Two-Piece Rear Main Seal Installation

A leaking rear main seal can lead to severe oil loss that can have a damaging effect on your vehicle. When it's time to replace the two-piece rear main seal, check out this video from Master Technician Mark Isaac of Garage Gurus for the advice you need to complete the job.
Using a Ford big block engine, Mark shows the process for replacing this seal with the crank in and the crank out of the engine. You'll appreciate Mark's helpful tips in this instructive video. Count on Garage Gurus to help you get your vehicle repair done right.



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[mikeb]

MARK!!!! Great video. It's Mike B, I'm going to give you a call. I'm replacing the rear main on the GP.

[xXGuNNyXx]

took a while to find the info i needed. this video gave it to me. THANKS!

[terryhill]

They make a wire tool with a ring in one end and a tiny screw in the other end to screw into top seal to extract it and to put the new one in, most of the time they come with 2- piece seals

[dharmakissoon]

tips n tricks on the caps seal, thanks

[MrZdvy]

I'm doing this now on a Chrysler 440, engine still in the car. Can I install the two seals flush with the bearing cap and block?
I understand it will seal better when it's offset, it's just a struggle laying on the floor and the bearing cap already in place. I figured I can put some sealer on the ends(?) instead of having to worry about the seal popping out or getting misaligned when I install the cap.

[lburkee]

So is the 351c the same as the 351m to do?

[tumashedrick]

I have a 78 caprice 350 motor im sure the rear main seal is leaking i dont want to pull the motor out of the car to do the seal can i do it in the car ?

[robjackson]

Never loosen all main bolts, oil seal an can be rotated into the block without issues,

[mountainmyst]

The video talks about the seal installation but never does

[OBSSmediaAaronWoodruff]

You don't show where the two black rubber pieces go? They sort of look like a comma in 3-d. What are they and where do they go? There are the 2 halves of seal, 2 plastic sleeves, and 2 blue side rail straight seal pieces. what about the 2 gray rubber pieces that look like commas?

[johnrwhite]

I’m having to reinstall the rear main oil seal on my ford 460 which is in my 32 ft R.V I’ve pulled the transmission and had to raise the engine up to make clearance to the rear of the oil pan I then pulled the rear cap ! My question is how would you go about extracting the top seal is there a way to do this ? Also I’ve only been able to take off only the rear cap but haven’t been able to remove the oil pan entirely so I’m not able to loosen the other crank bolts only the rear !

[denverkenyon]

Where you put the sealer on the cap would not keep oil from getting out of the engine. The oil will now follow that straight to the back of the block and still leak

[JCcanU]

Dodge Dakota 3.9L Magnum is the same .

[florianmeier]

Hey Gurus I have the Fel Pro rear main seals and the recommend to put some RTV on the end of the seal. Can I use also the Loctite 518. Thanks for Help

[Samwise]

Didn’t show how to ensure proper crush clearance.

[tazaxxbazaxx]

The way he put the sealer on the cap just doesn't look right..