mgs
[Top] [All Lists]

Re: Compression Test deciphering

To: mgs@autox.team.net
Subject: Re: Compression Test deciphering
From: gmccann@pcug.org.au (Graham McCann)
Date: Mon, 18 Sep 1995 10:04:28 +1000
>Well, in order to try to track down the oil consumption in my new
>Midget, I performed a compression test this afternoon.  The results
>are:
>
>  First Test
>  ----------
>
>No. 1  No. 2  No. 3  No. 4
> 160     54     50    155
>
>  After adding oil to the low cylinders thru the spark plug holes
>  ---------------------------------------------------------------
>
>No. 1  No. 2  No. 3   No. 4
> XXX     56     55     XXX
>
>XXX = didn't take a reading
>
>
>As you can see, 2 & 3 are pretty weak, and adding oil to the cylinders
>does not seem to help.  I was under the impression that if rings were
>going, adding a bit of oil should bump the compression up just a bit.
>If this is the case, what do my readings likely indicate?
>
>At any rate, this sure explains why the #2 plug loaded up with oil
>after a long jaunt on a forest road last night.
>
>Thanks in advance,
>
> -Matt (who doesn't mind if he is to rebuild the whole engine as long
>        as there is no bodywork involved!)
>
>--
>|                Matt Liggett <mliggett@indiana.edu>                 |
>|              http://seven.ucs.indiana.edu/~mliggett/               |
>|--------------------------------------------------------------------|
>|  1974 Ford Bronco Ranger   1970 MG Midget   1978 Honda Civic 1200  |
>
Matt,

Don't give up yet.  It does sound like rings but compression is also greatly
affected by the sealing of the valves- and indeed the cylinder head.  I
would take the head off first and review further action then.
Regards 
Graham McCann  Rivett, ACT. Australia
gmccann@pcug.org.au
06 2889055
______________________________________________________________


<Prev in Thread] Current Thread [Next in Thread>