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Re: 318 rear main seal question.... #114122 09/02/08 11:33 PM 09/02/08 11:33 PM
Joined: Jan 2003 Posts: 1,586 Tampa, FL tpabayflyer OP pro stock
tpabayflyer OP pro stock Joined: Jan 2003 Posts: 1,586 Tampa, FL	I thought my leak was the pan gasket as well but it looks like it was the seal. I am not going to cut the gasket and rotate the seal as others have suggested. I am going to install it with the rubber tips inserted into the cap as designed. I will use a dab of rtv on the parting line area of the seals. It just looks to me that the seal is in fact designed to be installed just 1 way....... TBF

Re: 318 rear main seal question.... [Re: tpabayflyer] #114123 09/03/08 07:33 AM 09/03/08 07:33 AM
A Anonymous Unregistered
Anonymous Unregistered A	also rtv the tabs that extend out in the notch in the cap. let me know how easy it is to get that old rear main seal out

Re: 318 rear main seal question.... #114124 09/03/08 10:12 AM 09/03/08 10:12 AM
A Anonymous Unregistered
Anonymous Unregistered A	i am installing a rear main in my 318 tonight and i am scared to death i will have to pull this motor again if its not right. i just want to stop my james bond smoke screen. any tips on a flawless install? i will be working on it hanging from the engine crane.

Re: 318 rear main seal question.... #114125 09/03/08 04:07 PM 09/03/08 04:07 PM
Joined: Jan 2003 Posts: 1,586 Tampa, FL tpabayflyer OP pro stock
tpabayflyer OP pro stock Joined: Jan 2003 Posts: 1,586 Tampa, FL	Let us know how it goes... I won't be able to get back to my project until saturday... good luck... TBF

Re: 318 rear main seal question.... [Re: tpabayflyer] #114126 09/06/08 05:54 AM 09/06/08 05:54 AM
Joined: Dec 2007 Posts: 2 Australia A ap6valiant member
ap6valiant member A Joined: Dec 2007 Posts: 2 Australia	was original seal out of detroit gasket set as i had same problem with mine years ago then put new fel pro in and no probs

Re: 318 rear main seal question.... [Re: ap6valiant] #114127 09/06/08 10:05 AM 09/06/08 10:05 AM
Joined: Jan 2003 Posts: 1,586 Tampa, FL tpabayflyer OP pro stock
tpabayflyer OP pro stock Joined: Jan 2003 Posts: 1,586 Tampa, FL	I think I bought a gasket set for a 318 magnum engine as I was putting magnum heads on my LA block. It looks like the rear main seal is different and was the cause for the leak. I also did get a fel-pro seal for a 70 318 so hopefully it will work.... TBF

Re: 318 rear main seal question.... #114128 09/06/08 04:48 PM 09/06/08 04:48 PM
Joined: Aug 2004 Posts: 3,333 MARYLAND 69Cuda340S master
69Cuda340S master Joined: Aug 2004 Posts: 3,333 MARYLAND	Quote: also rtv the tabs that extend out in the notch in the cap. let me know how easy it is to get that old rear main seal out The upper half will come right out without loosening all the main caps. You just push on one side and the other side comes out then just pull it out. Clean block and main bearing mating surfaces with Brake Parts Cleaner and clean paper towels then put a small film of RTV on that area before assembly. Put a small film of oil on the seal lip so it doesn't get burned up on initial start up. I run a Fel Pro rear main in my 340 and it has not leaked one drop in years.

Re: 318 rear main seal question.... [Re: tpabayflyer] #114129 09/08/08 07:44 AM 09/08/08 07:44 AM
A Anonymous Unregistered
Anonymous Unregistered A	turns out my rear main seal wasnt the reason for the leak in my motor. it was the rubber pan gasket at the back of the pan. I am running a milodon 7 qt pan and the gasket there sits up much too high. I figured it would smush down when I torqued the bolts but it apparently split. I put a new seal on and trimmed it with a razor blade even with the side gaskets and it seems to have worked.

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