Deadpurpledog Posted November 19, 2023 Share Posted November 19, 2023 Not heavily, however, don’t like the mess and will replace. Are there other things I should address while vehicle is apart, please? Link to comment Share on other sites More sharing options...
EmTee Posted November 19, 2023 Share Posted November 19, 2023 Which end? Both? Link to comment Share on other sites More sharing options...
Deadpurpledog Posted November 20, 2023 Author Share Posted November 20, 2023 Both Link to comment Share on other sites More sharing options...
jrbartlett Posted November 21, 2023 Share Posted November 21, 2023 Should also replace the front seal in the transmission if you are pulling the engine out. 1 Link to comment Share on other sites More sharing options...
Deadpurpledog Posted November 21, 2023 Author Share Posted November 21, 2023 Thanks JR. Link to comment Share on other sites More sharing options...
edinmass Posted November 21, 2023 Share Posted November 21, 2023 Excessive main bearing wear can and is usually the cause of the leak………if you pull the engine, check the bearings………of course, it can open up a big can of worms. Go slow, drive the car for a year. Tearing it apart is easy, getting it back together is not. 4 1 Link to comment Share on other sites More sharing options...
Pfeil Posted November 21, 2023 Share Posted November 21, 2023 (edited) Just some food for thought. For rear mains. Do not use a rope seal. Use a Viton seal. I deal mainly with Pontiac and there are two types of Viton seals for Pontiac one is the split type, and the other is single piece type. I'm not sure about Buick but if they have the single type I would use that one. The single type requires the crank to come out. Edited November 21, 2023 by Pfeil (see edit history) Link to comment Share on other sites More sharing options...
Deadpurpledog Posted November 23, 2023 Author Share Posted November 23, 2023 Thanks Pfeil. You and others are preparing me with lots of questions to help insure a good outcome. Link to comment Share on other sites More sharing options...
Deadpurpledog Posted November 23, 2023 Author Share Posted November 23, 2023 Please provide more information re why so difficult to put back together, edinmass. What are the challenges? Link to comment Share on other sites More sharing options...
edinmass Posted November 23, 2023 Share Posted November 23, 2023 Mr Purple…….challenge is today people are busy, and assembly is usually ten hours for every one hour of disassembly. If the mains are worn, you can bet the rest of the engine is tired. Resealing an old engine often just makes the blow by push out a gasket in a new spot. There is no free lunch. If you leak is small, just drive the car and enjoy it. I was encouraging you to use the car for a while before jumping in with two feet to take it apart. 3 Link to comment Share on other sites More sharing options...
EmTee Posted November 24, 2023 Share Posted November 24, 2023 Maybe try a one of the motor oils formulated for 'high-mileage' engines first. I have no experience with them, but it could stop, or slow your leaks and delay the day when you need to make permanent repairs. My Riviera has a couple of leaks, but I have a piece of cardboard on the floor and I check the oil to keep tabs on the level. It only loses maybe a quart during the driving season (500 ~ 1000 miles). Check the valve cover gaskets - mine were leaking at the rear (by the bellhousing) and oil running down the back of the block can mimic a rear main seal leak. Link to comment Share on other sites More sharing options...
Deadpurpledog Posted November 24, 2023 Author Share Posted November 24, 2023 Interesting. Don’t think that’s my issue. . .yet, who knows? Link to comment Share on other sites More sharing options...
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