Not good. Max differential between the highest and lowest readings should be 10%; so 135psi X 10% = 13.5psi as the max allowable difference between the highest and lowest cylinder readings, your MIN should be 121.5psi. Your lowest reading is 95psi = not good. Now to determine where the pressure's escaping; valve(s) or rings (or even a cracked head). A differential compression (leakdown) tester will show your mechanic where it's leaking, and then you can determine a course of action from there. Teardown is the other alternative..... I'm afraid to say, but it's a probably a valve job at least, a top-end or complete overhaul at worst. Mike B.
----- Original Message ----- From: "BJ Feddish" <bfeddish@NETREACH.NET> To: <vanagon@GERRY.VANAGON.COM> Sent: Wednesday, March 19, 2008 5:04 PM Subject: Still running like crap, the saga continues - Compression Test
> OK, my mechanic has had my van since last Friday and he called to tell me > it's done. Anyway he did a allot tests and some other work. Details on > that > later. He said the compression varied from 95 to 135. How bad is that? > What > have I got a month, year, decade left on this engine? > > Thanks, > Bryan > |
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