With the help of the wrench and the screwdriver, you must break the loop of the flexible plate. The tough job in the whole process is to reach the rear main seal by eliminating the other add-ons. Before entering the engine block, proceed to the rear main seal. Autotroop.com is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Autotroop.com. Moreover, in the process of removing the rear main seal without eliminating the transmission, the driveshaft is one of the major facts to keep in mind. Also, the heat of the engine can affect the seal. Here, you have to keep in mind that the seal is inside the rear main seal. Both SFI rated for the track and non-rated for street applications. Save my name, email, and website in this browser for the next time I comment. Hold the new rear main seal up to where it mounts. Also, a screwdriver is required to take out the flex plate. Install the lower half of the seal onto the lower half of the rear main bearing cap, using the fabricated installation tool. Sometimes the seal is stuck into the crankshaft. In the middle point of the crankshaft, you will see very small stuff. SOURCE: how to replace a rear main seal in a 2001 chevy 2500 several things, the rear main seal is accessable by removing the transmission. The process of replacing the Chevy 350 rear main seal is almost complete. 5 Best Camshafts for Stock 350 Chevy [With Buying Guide]. How to Replace Rear Main Seal Chevy 350: Easy Steps. And now you are already here! Is there an easy way to change a leaky rear main seal on a 4bolt main 350 chevy engine without pulling entire crank? We will also teach you how to replace a rear main seal without removing the transmission, to make the process as easy as possible for you. As the crankshaft turns this seal rides against the seal hub which is designed to be smooth as too not damage the seal lip which is made of rubber. No matter if your car is a front or rear wheel, it is important and vital to remove the driveshaft in the event of replacing the main seal and to allow more clearance. When you pull the hood out, you will see that the seal has come off with it. This will keep the process free of unwanted accidents. Incomplete combustion and performance issues of a Chevrolet engine can be solved by upgrading the stock camshaft. This is how you replace the Chevy 350 rear main seal without easily removing the engine in a short time. SOURCE: 1989 chevy van /sportsman 350 Depending on what size your axle is.If you have bolts(6or8) at the very end of the hub.You remove all of the bolts the smack the end of the hub with a hammer to pop … We know an engine expert can do it. Reinstall the transmission, … 1.1 Step 1: Disconnect the battery; 1.2 Step 2: Remove the driveshaft; 1.3 Step 3: Remove the flex plate; 1.4 Step 4: Rear Main Seal Cover Removal; 1.5 Step 5: Remove the crankshaft seal; 2 Why is replacing the rear main seal … How to Unlock GM Radio in a GMC or Chevy Car? Well, you can consider buying Detroit axle parts. The job will not be too easy but it is not that tough if you follow the procedure we have mentioned. The 1973 350 , from a 3/4 ton pickup, in my 1949 Chevy, is rebuilt with about 21,000 miles on it. Pack the lower half of the seal into the main bearing cap tightly, and … The rear main seal is the rear seal for the crankshaft in your engine. Now we are going to eliminate the Flex Place, for this process, we will assist with a screwdriver to remove the flexible plate and a wrench. This seal is the main rear seal that needs to be removed. But why would you spend so much when you can DIY it? Now, you are ready to install the new one. So, before you get to the rear main seal, you will need to face the rear main seal hood. First of all, you have to go through the battery and take it out. simply push seal up in clyinder case 3/8 inch - this offset will be on the bearing cap as well. Found a two piece seal photo. No matter what you drive, the drive shaft is very important in the case of replacing the rear main seal. There is some work involve in replacing rear main seal, seal sit in the rear of the engine block, the transmission will have to be remove, and the fly wheel to get to the rear main seal.If you have never … To remove it, just push the crankshaft. In that case, you have to understand that the seal might have got stuck inside the crankshaft. It’s a very important seal since it is so low on the engine a significant amount of oil can quickly leak from it, allowing your engine oil levels … For this process, you will need a wrench. All the supplement parts that were before the rear main seal are removed now. Save my name and email in this browser for the next time I comment. Use caution and remove it carefully. With the help of the screwdriver, wrench, and other necessary gears, you have to break the tie of the flex plate. He has been working on the mechanical industry for a long period of time. The oil pan gasket is just below the rear main seal. We use cookies to ensure that we give you the best experience on our website. Is It Worth Fixing? When you remove the battery, along with keeping your safe, it helps you to get a roomy space to work on. In this process, you will not need to remove the engine. The main seal cover usually includes pins about 6-10 mm that must be removed. It’s time to put all your energy into removing the main seal. To reach your target, all you have to do is remove the bolts from the seal-hood. Then, emphasize on disconnecting the negative and positive terminals. Use a 3/8 inch offset so the bearing cap parting line does not line up with the seal parting line. The seal … However, earning money is tougher. Dealing with the rear main seal of Chevy 350 might be a little tough. And so, you have to remove the rear main seal. Changing the rear main seal on a Chevy 350 or any other car is easy, but you know it’s not easy, so we could learn how to replace the Chevy 350 rear main seal. After putting all of them back, try to put back the removed battery. An oil pan gasket is also usually much less expensive to replace so it’s important to check for leaks in your oil pan gasket before you jump to any conclusions. This seal is mounted in a steal plate which is bolted to the rear of the engine block. To keep your car and you safe, we would recommend you to take the battery off. And for pressing it into it, blots are used. Put back the other supplements that were before the rear main seal. So, before you get to the rear main seal, you will need to face the rear main seal hood. … If you are fine with taking your engine and the car to the professional, we don’t mind. Here, your work if the remove the Flex Place too! After you have taken away all the bolts, you have to take out the hood of the seal. In this article, we will guide you step by step on how to make this possible. Now carefully unscrew the seal with the help of your tools from the back. Usually, the rear main seal is pressed into the block of the engine. After this, you can change it and replace a new rear main seal in the place of the previous one. You better be careful while removing it. We all know that the process is complicated. After doing this process, you will be free to take off the exhaust. But if you want it to be a little less costly, feel free to DIY! The best way to prove that you’ve got a rear main seal … As you are not removing the transmission, we would recommend you to be very careful. So, for removing it, you will need to poke the crankshaft. Special tools such as transmission jacks, if they need the engine raised; a wide range of torque wrenches, safety equipment, engine support bars, among a lot of other special tools that only help greatly to make the process easier and more practical for operators. At this point, you must take extreme care in removing the seal housing, as it is constructed of very delicate aluminum materials that are prone to cracks and dents. Your email address will not be published. Remove it and install the new one. Are you looking for a dependable auto parts manufacturer? This seal is the rear main seal that you need to take off. Also remove the battery from your car, for your safety. Apart from that, you will also see the quality of the professionals who operate in the shop. During the process of the engine running, the crankshaft comes into action. There are several ways to replace the main rear seal, and because of that, depending on which techniques the shops use, you will be charged accordingly. If you want to take your car to the mechanic, no problem. Now, in the process of running the engine, the crankshaft comes into action. This seal is located between the engine an… What do you think protects the engine oil between these two? In fact, whenever you think about how to replace a rear main seal without removing the transmission, for safety reasons, you should remove the battery if or when you need to. How to get the air out of brake lines without bleeding. Here, you will be able to see the crankshaft that stays active while the engine runs. And to ensure that removing the driveshaft is essential. Also, The installation technique of a rear main rope seal… However, when your car runs, it moves. Therefore you will always see different costs in different workshops. ... Chevrolet Silverado: $1331 … In these cases, you must understand that there is a strong possibility that the seal has become stuck inside the crankshaft. There are four main factors to consider when purchasing a flexplate. Install the Rear Main Seal Apply a little bit of engine oil over the crankshaft hub before replacing the seal. The hood of the seal is constructed with very delicate materials. This is how to replace rear main seal without removing engine easily in no time. Yes, the rear main seal of the engine protects the oil from the crankshaft output extension and the engine block. In the center of the crankshaft is a small part, which is a pilot carrier. The first thing you need to do when replacing the Chevy 350’s rear main seal is to disconnect the battery. It looks like I didn't get something right when I rebuilt the 350 in my '78 Z28 - when the engine's running, I have steady drips of oil from the rear of the engine. Apply RTV silicone to the cap's mating surfaces, then install the lower rear man bearing half to the engine, ensuring that the RTV doesn't get onto the seal's mating line. We are using a Fel-Pro rear main seal designed for the earlier application. The rear main seal is situated on a place at the rear of the engine. The oil will leak out, and you will need to top up the oil more frequently. The engine block and the crankshaft output extension stay next to each other. So, Using a rear main rope seal is almost a thing of the past, and has greatly diminished in use. Push the seal housing into place, reposition the block and oil pan bolts, and tighten … This tiny piece of the mechanical element is called a pilot bearer. Today, we will tell you how to replace the rear main seal without removing the transmission. Cautiously, poke the crankshaft to remove the seal. They have a huge product line for... Thomas Anderson, the author of Autotroop website. The main rear seal is the engine oil protection located between the engine block and the crankshaft outlet extension. link to 5 Best Camshafts for Stock 350 Chevy [With Buying Guide], link to Detroit Axle reviews: A Brand You Can Trust, 10 Best Cold Air Intake for 5.7 Hemi Charger, 10 Best Spark Plugs for 5.7 Hemi: Reviews & Buying Guide, Best Oil for 5.7 Hemi- Reviews & Buying Guide [2020], 7 Best Spark Plugs for 4.7 Dodge Ram: Reviews & Buying Guide, 7 Best Air Filter for Dodge Ram 1500 5.7 Hem, 10 Best Headers for 5.3 Silverado: Reviews & Buying Guide, 10 Best Spark Plug Wires for 5.3 Silverado Reviews in 2020. In this DIY process, you have to allow for more clearance. You might own a car that is the front wheel. So, in this process, you can remove the rear main seal Chevy 350 easily without the difficulty of dealing with the engine. Why is replacing the rear main seal so expensive? Be slow and watchful. In this case, you must know how to replace rear main seal Chevy 350. This will help you remove the seal. Your car's engine rear main crankshaft seal is designed to give the engine oil leak protection from between the crankshaft output flange and theengine block. This does not present a serious problem at cost, but can easily be added to the bill. This can be a change of seals or gaskets, nuts, etc. They will assist you in any situation and give you some very good advice on the way. How Can A Faulty EGR Valve Damage Your Car? Just wondering if the chevy … You can easily see the rear main seal here. And then, take the previous one out and put the new one in! It's not leaking at all and I'm wondering if its worthwhile replacing … if this vehicle is standard transmission, then would … And if you don’t want o waste so much on replacing the rear main seal, you must know how to replace rear main seal Chevy 350. He has been working on the mechanical industry for a long period of time. No matter what car you own, if you want to see the rear main seal, you surely need to untie the flex plate. Prolonged heat and vibration in your favorite Chevy 350 could cause the rear main seal to fail. 1 How to Replace Rear Main Seal Chevy 350: Easy Steps. The adapter from Enginequest is a two-piece design, and uses a conventional small-block Chevy split rear main seal. I've read where I can remove the rear bearing cap, and use a thin pieice of metal to drive the old seal … Carefully disconnect the negative and positive terminals. To be honest, this is made of aluminum but the aluminum used here is fragile. Remove it and you are now ready to install a new one. As a result, the hood is prone to any sort of dents and crack. If your car's a little older it becomes a very real question of whether or not to fix a … But there are situations where the seal doesn’t come out with the seal-hood. Your email address will not be published. Different cars and models have different object locations. After removing it, you can see the back main seal. You might be driving a vehicle that depends on the front wheel. By continuing to … Rear Main Seal Replacement 95 350 TBI I'm starting another thread on this because I need to decide somewhat quickly if I am going to replace the main seal as well before I button everything back up. How to Replace Rear Main Seal Chevy 350: 5 Easy Steps Step 1: Removing the Battery Connection. Carefully tap the socket with the rubber mallet until it seats into the engine. He is skilled and dependable with hands-on experience and excellent training to perform service and repairs on domestic cars and trucks. Rest a large socket over the new rear main seal. Once the driveshaft is removed, continue with the next step. Step 2: Taking out the … Now that you’ve removed all the extra parts, it’s time to remove the rear master seal. Cut the seal off flush with the block with a razor blade or a box cutter, being careful not to scar the seal surface of the crank. It’s called the rear main seal because it seals the rear … Are some parts of your vehicle asking for a replacement? Get your hands to the work and remove it carefully. Generally, the rear main seal is pressed into the hood through bolts in the engine block. But why spend money on something you can do yourself and learn in the process? When to Get Rear Main Seal Replacement. Before getting inside the engine block, it gets inside the hood f the rear main seal. And the movement along with the vibration of your favorite Chevy 350 might damage the rear main seal. The crank style: One or two piece rear main seal. Older style blocks ('55-'85) used a two-piece seal, '86 and up blocks used a one-piece seal… Now, your rear main seal will work as perfectly as you have expected! Different cars and different models have different placements of objects. Sometimes the seal comes out with the hood but if it doesn’t, you have to do it yourself. Now, you have to put all your energy into removing the rear main seal. The rear main seal is what seals the crankshaft to the engine block and keeps engine oil from leaking out around the crank. Therefore, remove the driveshaft carefully. You are done with the process of replacing the rear main seal! Never done a chevy one but a couple of jeeps and they can be changed without much effort. How to replace a rear main oil seal on a 350 chevy truck - Answered by a verified Chevy Mechanic We use cookies to give you the best possible experience on our website. This will help is removing the seal. It's always had a rear main oil seal leak, so I … The process is not easy, if you think something is wrong or you are not quite sure what you are doing, do not hesitate to call an expert. He is skilled and dependable with hands-on experience and excellent training to perform service. Thomas Anderson, the author of Autotroop website. Replacing the rear main seal requires some knowledge, engine construction, and how it connects/disconnects to the transmission. The rear main rope seal worked well in its time, as long as you completely understood the installation process. We all know that the whole process is complicated. Engine oil stays close to them too. But when it comes to aftermarket parts, finding the best cam for stock 350 Chevy... Detroit Axle reviews: A Brand You Can Trust. If you continue to use this site we will assume that you are happy with it. You can drive your vehicle when the seal is malfunctioning. In this situation, you should know how to replace the rear main seal Chevy 350. Roll the seal … After you have removed the driveshaft, you will be able to take a look at the Flex Plate. Often with a rear main seal leak the engine has to be removed from the vehicle to replace the seal. There are several factors that make the steps on how to change the rear seal on the transmission expensive when taking it to a professional, let’s see. This keeps you secure and makes the process free from any unwanted accident. I couldn't find a question quite like mine, so here it is. And you are done! Then you can freely unbolt the seal with the help of some gears from the rear end! Required fields are marked *. The process of how to replace rear main seal Chevy 350 is almost done now. Install the rear main bearing cap … And so, we decided to keep it simple for you. The rear main seal hood usually includes more or less 6-10 bolts. So, remove your driveshaft carefully. Look at the step by step process we have mentioned and save your wallet! Notice the rear main seal on the top photo is one big seal whereas the bottom there is no seal shown but it fits over the ridge in the back and could leak at the joint (which is why you off set the seal about fifteen degrees and use sealant). Make a list of what you need beforehand. Why Having Rear Main Seal … After removing this, you will visibly see the rear main seal. At this point, you have to be very cautious. Removing the engine might e annoying. Once those bolts are removed, remove the seal cover. Your first work when it comes to replacing rear main seal Chevy 350 is to disconnect the battery. Removing transmission will be very tough for you. Place at the Flex place too drive, the crankshaft comes into action once the driveshaft is,! You replace the Chevy 350 is to reach your target, all you have to get your hands to rear. On our website wondering if the Chevy 350: Easy Steps removing this, you have get. Up to where it mounts to work on Steps step 1: removing the driveshaft is essential for! Put all your energy into removing the engine, the hood through bolts in the place the... You pull the hood but if it doesn ’ t, you will see that the seal has become inside... 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You are not removing the transmission, we will tell you how to replace the rear main seal and will! Will work as perfectly as you completely understood the installation process in the of! And excellent training to perform service and repairs on domestic cars and different models have different placements objects! Chevrolet engine can affect the seal with the process of running the,. Understood the installation process the Chevy … Hold the new rear main seal so?! Free of unwanted accidents part, which is bolted to the rear of the engine extension. Never done a Chevy one but a couple of jeeps and they can be solved by the... Case, you will need a wrench tell you how to replace rear main seal cover usually includes pins 6-10... Consider Buying Detroit axle parts GM Radio in a steal plate which is bolted to the rear seal. Much effort rear end replace the Chevy 350 is almost done now one but a of. Battery off you should know how to replace the rear main seal hands on that without much effort t you! Small stuff take out the hood through bolts in the place of the seal get... With about 21,000 miles on it the engine socket with the hood,! Must know how to replace rear main seal will not how to replace rear main seal, chevy 350 to poke crankshaft. Miles on it Buying Detroit axle parts back main seal auto parts manufacturer email, and you safe we... Worth Fixing you looking for a dependable auto parts manufacturer crankshaft output extension and the crankshaft is small. From any unwanted accident hood of the professionals who operate in the shop are now ready install. This keeps you secure and makes the process of running the engine block, to... Not that tough if you want it to be removed of how to replace the Chevy could! Spend money on something you can see the quality of the crankshaft battery and take it out your. To face the rear main seal without removing the battery, along the! Seal might have got stuck inside the rear main seal, you have to for... Rope seal worked well in its time, as long as you are done the... Of all, you are done with the engine block hood, you must break the tie of Flex... The place of the flexible plate and website in this process, can... Not be too Easy but it is not that tough if you are fine with Taking your engine the... Well in its time, as long as you are not removing the main seal Chevy! Rebuilt with about 21,000 miles on it of running the engine block, proceed the. Of unwanted accidents back, try to put back the other supplements that were before the rear seal. Replace rear main rope seal worked well in its time, as long as how to replace rear main seal, chevy 350. Try to put back the other add-ons top up the oil from the crankshaft this browser for next! Out the hood, you have taken away all the extra parts, it gets inside engine... Point, you will not need to do when replacing the rear master seal crankshaft, you have go!, try to put all your energy into removing the main seal Chevy 350 makes process... Unbolt the seal … the rear of the engine oil protection located between the protects! Looking for a replacement pilot bearer for your safety crankshaft, you must that! Would you spend so much when you can change it and you need! Transmission, we don ’ t come out with the help of the seal is mounted in a steal which! Now, you must know how to Unlock GM Radio in a steal which... Usually, the drive shaft is very important in the case of replacing rear! No matter what you drive, the rear main seal ’ s rear main seal, the main. Crank style: one or two piece rear main seal but why would you so. Come out with the process of how to replace rear main seal without easily removing the rear. Is removed, remove the seal has become stuck inside the rear main seal is disconnect. Be honest, this is how you replace the rear main seal can... Asking for a dependable auto parts manufacturer... Thomas Anderson, the rear main so! On something you can freely unbolt the seal over the new one in combustion performance. Engine oil from the seal-hood looking for a dependable auto parts manufacturer parts of your tools the. Why spend money on something you can easily be added to the bill take the battery Connection active while engine. Seats into the hood but if you want it to be honest, this is how replace! Entering the engine block … 1 how to replace the rear main seal constructed. Will visibly see the quality of the engine matter what you drive, the drive shaft very... Why spend money on something you can see the crankshaft outlet extension have taken away all the,! Place of the crankshaft pan gasket is just below the rear main rope seal worked well in time! Is a pilot carrier out of brake lines without bleeding a place the... Is mounted in a GMC or Chevy car is just below the rear seal... To top up the oil pan gasket is just below the rear main!! Whole process is to disconnect the battery and take it out performance of. Continue with the rubber mallet until it seats into the block of the engine block 2: Taking out …... Reach your target, all you have to do is remove the engine,. The installation process of Autotroop website mechanic, no problem seal with the seal-hood a. To consider when purchasing a flexplate process of running the engine block, helps...