I'm not sure if mine is fixed or not- I have a leaky valve cover that tends to muddy the results. Maybe someone who has a good non leaky valve cover that has done the BRM "O" ring replacement method could chime in? I can say however that anything would have been better than the squared off, worn down plastic feeling "O" ring I removed though! In a couple weeks I plan to get my Valve cover leak sorted out, and realign my drivers side cam bearing cap(since it is slightly misaligned causing potential oil leak path) and I should know results shortly after that.josh8loop,
Mine's leaking, too....:>(
Well, I am behind on positing my findings as it has been a long process of trying this or that. The replacement O-ring from the BRM filter appeared to be the fix but it wasn’t too long and the small leak was back.
At first I thought it might be my value cover gasket so I added some DIY gasket in that corner including in the corners of the cam bearing seals near vac pump.
Nope, still the same issue, so before trying to install my new vac pump I purchased from BoraParts, oh did I mention I did replace the vac pump seal twice. I took the vac pump off again, clean the surfaces, thought I saw a few nicks or scratches that could cause a leak so I added some DIY gasket around the entire vac pump only, reinstalled and started driving.
BINGO !! After several attempts at various tests, this one appears to have done the trick !!! So far to date 06/25/2012, no leak. When I get time I will post a few pictures of what I saw and what I ended up doing with hopes this might help someone like a lot of you have for me. Thanks everyone !!
Well, it appears I spoke too soon, as of last night I noticed a small leak again and will start monitoring it more closely to see if the issue has come back !! Sorry guys, thought by chance I got lucky but I see I am joining a few that have been down this road seeing same results. Back to the drawing board.......
When you removed that end cam bearing cap, did you place a small dab of rtv under the cap ends against the head? If you dont it can leak from between the head and cap.Don't feel too bad, mine still weeps a bit also. I think it's has lessened though. You mentioned the nicks on the sealing surfaces. I went to the extreme of using some really fine grit wet/dry sandpaper attached to a straight block and wet sanded all vac pump mounting areas cautiously. I need to inspect it again to see how things look now and will try to report back.
I went to buy an oil filter kit for the BRM engine, and was handed the same filter and O-ring set I get for my ALH engine.Anyone have an update on finding the proper O ring for a leaking vacuum pump? A guy in this thread says he has found one that works.
Can't remember if I did that or not. I know I loosened the cam bearing end cap to realign so the vac pump to head/cap bearing cap mating surface was as flush as I could get it. Then I followed that by using some really fine sandpaper to ensure the entire sealing surface was true. Come to think of it, I'm not convinced I did add sealant to the bottom section of the cam bearing end cap. Drat! At least the oil leak is at worst annoying(just some oily wetness) and certainly doesn't demand immediate action.When you removed that end cam bearing cap, did you place a small dab of rtv under the cap ends against the head? If you dont it can leak from between the head and cap.