What's this? Open Throttle? I haven't done that. Why would I have to apen
the throttle?
Mike
-----Original Message-----
From: HFC [mailto:froggi@cdsnet.net]
Sent: Tuesday, May 04, 1999 2:34 PM
To: Jeff Boatright
Cc: spridgets@autox.team.net
Subject: Re: Poor Compression
You are checking compression with the throttle opened fully, right!?!
WFO Herb
Jeff Boatright wrote:
> Did you check with the engine hot? I've found that for accurate
compression
> check, I need to bring the engine up to running temp, shut down, and check
> asap. Weare gloves to protect against burns. Also, how much do you trust
> your gauge? At a recent AHCA tech session, I found that one gauge was
> consistent, the other gave occassional oddball readings in comparison. The
> inconsistency is what led me to chuck it.
>
> Jeff
>
> At 9:42 AM -0400 5/4/99, Michael Graziano wrote:
> > So last night I had two options for things to do. 1. Do my laundry as
I
> > had no more work clothes, or 2. Check my compression for no apparent
reason.
> >
> > Of course I check the compression. And now the results.
> >
> > Cyl 1: 130
> > Cyl 2: 130
> > Cyl 3: 110
> > Cyl 4: 130
> >
> > So now I'm concerned about #3. About 500 miles ago, they were all
around
> > 125 to 130. Now the 125 ones are @ 130 and a 130 cyl is at 110. I put
in
> > 5cc's of 20W50 and redid the test on #3 with no change. 5 more cc's (10
> > total) and the PSI jumped to 125 from 110. During that 500 miles, I've
> > changed from SAE 40 to 20W50. Could that have contribute towards the
> > difference?
> >
> > Could I have botched the valve adjustment, or is this simply a sign of
worn
> > rings? If the latter, is there anything I could do (other than not
drive
> > the car) that will prolong the problem. Probably not.....
> >
> > Michael
> >
> > '78 Midget 1500 (Who performed quite well on the 150 mile trip to
Britfest)
> >
> > PS: I wound up doing the laundry too..... Not as much fun, that's for
> > sure.
> > _____________________________________
> >
>
> Jeffrey H. Boatright, PhD
> Senior Editor, Molecular Vision
> http://www.molvis.org/molvis
> Mailto:jboatri@emory.edu
> 404-778-4113
|