However the process to get to the rear main seal to replace it often requires removal of the entire engine and transmission from the vehicle a job that can only be done by very skilled mechanics and even then can take 6-10 hours. If the crankshaft is scratched the entire crankshaft must be replaced or new leaks will develop.
There are many reasons you should regularly change your engine oil.
How to replace a rear main seal without removing the transmission. 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. Easy Steps Step 1. If you do not have a seal remover you can use a common screwdriver to pry the seal out.
Pay attention to how deep it is. Remove gearbox to engine mounting bolts. Take EXTRA care to not damage either the seal housing or the crankshaft.
Take care not to scratch or nick the polished surface of the crankshaft. Do not hit it hard. Press the new tail housing seal in as far as possible making sure it is perfectly straight.
Match The New Rear Crankshaft Seal. Carefully pry the rear oil seal out its bore in the exposed end of the engine block using the seal removal tool or a large screwdriver. The first thing you need to do when replacing the Chevy 350s rear main seal is to disconnect the battery.
A how to video on replaceing your rear seal on the 4l60e this applys to about all 2wd rear wheel transmissions. Clean and prep the mating surfaces on the block and seal housing so. You can get my favorite seal puller from Amazon HERE.
Jan 26 2014 Gently tap the seal in. Un-bolt the rear main seal housing. Without a regular oil bath your rear main seal can become dry and hard causing it to not seal properly around the rotating crank shaft.
If you are planning on replacing the old rear main seal with a new one you need to match the new choice to the old unit ensuring they match inside. Like the th350 turbos and 700r4s and more. The seal fits snugly around the crankshaft.
Take your time and keep it as even as possible as it goes in. Jun 27 2009 your better off to pull the motor but in any case remove oil panremove rear main assymain bearings and loosen all others a couple turnspull. You need to remove the seal using a gentle prying technique.
Remove starter motor tucking wires up out of the way. I always use a wire tie for thisits cheap fast and works super Remove exhaust system attachment to gearbox. Nov 06 2001 Rear Main Seal replacement tips.
Yes a lift was involved but there engine and transmission is still in t. Take care not to scratch the surface of the transmission where the seal rides else you will have a leak that cannot be fixed without replacing the tail shaft. Now remove the rear main seal by hand from the hub.
Some cars may require removal of the exhaust system from the rear of the catalyctic converter on back. Sep 03 2019 Replacing the rear main seal in a 351c without removing the engine or transmission. How to replace Rear Main Engine Seal if vehicle has no removable flange around seal.
Apr 20 2020 Sometimes the rear main crankshaft seal can get stuck. Use the old seal on top of the old one to help. You dont want to pound it in so much that it starts to bend and break the seal.
How to Replace Rear Main Seal Chevy 350. Things like sand salt or road grime can cause premature failure of your rear main seal from the outside in.