Thread: 5.7 lt-1

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Hey guys I have been gone for awhile. I bought a 73 Challenger and have been in the (long) process of building it. Still a long way to go. In addition to that my wife and I are raising a 3 year old and at 63 and 57 that takes a lot of time and head scratching. You would think to second time around you would have all the answers but you dont. Anyway a totally different subject. I bought my dads last car, a 94 roadmaster 5.7 LT-1. Thought it would be great as a spare in case someone need a car while theirs was in the shop. Turned out to be a nightmare. The current issue is a big oil leak at the offset filter adapter plate. I have replaced the o ring and gasket twice and for some reason when we have a freeze it starts leaking again. I have checked the LT-1 site and have not found a solution yet. Just checking here to see if someone has had similar issues.

what do you mean by off set filter adapter??????????? You should be able to just use a standard GM filter-------


If you are talking about an oil cooler between block and filter --------------????

Post a picture of what you've got, if you can get one from an angle that shows the parts & pieces.

Jerry GM put the cats on the rm so close to the oil filter they used an off set adapter and a smaller filter that tucks back in the corner next to the block and transmission cover. As Roger suggested I will get some pics tomorrow and post.

my suburban has 5.7 with an adapter from GM that uses a smaller filter and its on an angle because its 4x4. Its a pain to change but never leaked? Maybe you can check there filter adapters

What I found out was that there is a torgue spec (17ft.lbs.) for the two allen head bolts that hold the adapter on and the factory Oring is a little larger than the doorman replacement part. so far not leaking.