If this is your first visit, be sure to
check out the FAQ by clicking the
link above. You may have to register
before you can post: click the register link above to proceed. To start viewing messages,
select the forum that you want to visit from the selection below.
I’m looking at used e30’s and I know that when people get used cars inspected they often get a compression test. What does bad compression mean? Major work?
Ohhh, dunno about rebuilding it at that point. It would probably be easier to just get another.
I think Metric Mechanic welds on a thick aluminum plate on the back there to reinforce and support the part below the camshaft seal to prevent the crack. I guess you could do that to cover the crack but I wouldnt want a crack there at all....
A measure of the inability of a cylinder to hold compression. Instead of measuring pressure, like a compression test, a leakdown test measures pressure loss.
"See, we're adding a little something to this month's sales contest. As you all know, first prize is a Cadillac Eldorado. Anyone wanna see second prize? Second prize is a set of steak knives. Third prize is you're fired."
Is a leakdown test something that any specialized German car shop will be able to perform?
If the car I’m looking has shows bad leak down should I walk away?
Thanks for all the help guys...I don't want to buy a lemon :?
Is a leakdown test something that any specialized German car shop will be able to perform?
If the car I’m looking has shows bad leak down should I walk away?
Thanks for all the help guys...I don't want to buy a lemon :?
-Spencer
Yes on the shop question.
Not necessarily on walking away.
Look for less than 25% leakage. However, *most* e30's have ~ 25-30% on at least one cylinder.
EDIT: be suspect if they do the leak down and its all good, except for 1 cylinder. IE: 12%/12%/15%/35%/18%/19% that'll cause problems later on. Its better to have uniform leakage/bad compression across the board, then to have 1 cyl that is very bad.
They will be able to tell you if its past the rings, or through the head.
One way to tell for yourself: blue smoke on COLD start-up = leaky valve guides.
Comment