Still working on my 036. I finally got the test gauge in, and got an adapter made out of an old spark plug. Initially, the adapter had an internal leak, but I was able to drill part of it out and refill it with JB weld to seal it up. Then the adapter leaked on the OD. I found the washer on my sparkplug had a big nick in it, so I took it off an replaced it with an o-ring. After that, I did a pressure test and it held 8 psi with absolutely NO leak. Next I tried to do a vacuum leak test but no joy. I can't get it over about 0.5 bar, and in about a second or two it bleads down to around .25 bar and holds. I can see where I could have a vacuum leak without having a pressure leak, but it seems odd that the leak is so bad when it holds pressure just fine. Is it normal to have a substantial vacuum leak at anything above the smallest of vacuum, but no pressure leak at all?
It just now dawned on me mid-sentence to deadhead the vacuum pump and make sure it's not the problem, so I'll try that tonight.... Still curious if what I'm seeing is common with vacuum leaks though.
Thanks,
Mark
It just now dawned on me mid-sentence to deadhead the vacuum pump and make sure it's not the problem, so I'll try that tonight.... Still curious if what I'm seeing is common with vacuum leaks though.
Thanks,
Mark