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post #1 of 4 (permalink) Old 01-24-06, 12:01 PM
inag99@netzero.com
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92 ranger compression test

hello,

i have a 92 ranger 2.3l and i think the head gasket is blown. i did a
compression test and got the following results: 105,105,60,165. just
wondering if it could be more than a bad head gasket. why would the
pressure in #3 be so low and in #4 so high? is the compression from #3
leaking into #4? any thoughts will be appreciated.



 
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post #2 of 4 (permalink) Old 01-24-06, 12:01 PM
CJB
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Re: 92 ranger compression test

I once had a head gasket blow between cylinders, so that is possible.
However, the numbers you describe don't seem to indicate that at all. If
two side by side cylinders had an opening between them, both would have low
compression numbers. Besides, if you had a gasket blown between cylinders,
you'd hear a peck, peck, peck as the air was forced back and forth from
cylinder to cylinder.

It looks more like you either have a valve problem, or, more likely, a
problem in the cylinder. It might be the compression rings in that cylinder
are broken, or the cylinder wall is scored, or even a burned piston.

I'm no expert, by any means, so take this message as my somewhat educated
opinion. Someone else could tell you how to troubleshoot the situation
further.

CJB



<inag99@netzero.com> wrote in message
news:1138125874.083966.32390@f14g2000cwb.googlegroups.com...
> hello,
>
> i have a 92 ranger 2.3l and i think the head gasket is blown. i did a
> compression test and got the following results: 105,105,60,165. just
> wondering if it could be more than a bad head gasket. why would the
> pressure in #3 be so low and in #4 so high? is the compression from #3
> leaking into #4? any thoughts will be appreciated.
>



 
post #3 of 4 (permalink) Old 01-24-06, 01:01 PM
JR
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Re: 92 ranger compression test

Try removing plug for #3, squirt some oil in it, re-install plug , re-test
compression. If it goes up, that is usually a sign that rings are worn out or
broken.
JR

CJB wrote:

> I once had a head gasket blow between cylinders, so that is possible.
> However, the numbers you describe don't seem to indicate that at all. If
> two side by side cylinders had an opening between them, both would have low
> compression numbers. Besides, if you had a gasket blown between cylinders,
> you'd hear a peck, peck, peck as the air was forced back and forth from
> cylinder to cylinder.
>
> It looks more like you either have a valve problem, or, more likely, a
> problem in the cylinder. It might be the compression rings in that cylinder
> are broken, or the cylinder wall is scored, or even a burned piston.
>
> I'm no expert, by any means, so take this message as my somewhat educated
> opinion. Someone else could tell you how to troubleshoot the situation
> further.
>
> CJB
>
> <inag99@netzero.com> wrote in message
> news:1138125874.083966.32390@f14g2000cwb.googlegroups.com...
> > hello,
> >
> > i have a 92 ranger 2.3l and i think the head gasket is blown. i did a
> > compression test and got the following results: 105,105,60,165. just
> > wondering if it could be more than a bad head gasket. why would the
> > pressure in #3 be so low and in #4 so high? is the compression from #3
> > leaking into #4? any thoughts will be appreciated.
> >


 
post #4 of 4 (permalink) Old 01-25-06, 08:01 AM
Al Bundy
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Re: 92 ranger compression test

My thought is that you have three bad cylinders. I'm sure it runs badly
and you have other symptoms too. Perhaps sharing the whole story would
help you.

 
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