A big compression increase could also happen if you add a "lot" of oil. Only
use a little bit, say a medium squirt or 5cc. It still will increase the
compression some, so you need to check another cylinder too, a suspected
good one. What you are really looking for is a bigger increase in the bad
cyl, vs the the good one, to spot a bad ring seal.
Adjust the valve first, to rule that out. Also, it could still be a burnt
valve. That can be tested by adding air to the spark plug hole, with the
valves shut. It'll "whistle" if the valve is burnt / not sealing. You should
be able to tell the three things apart long before you ever pull the head.
The only other possibility is a leaking head gasket, and that should show up
with a major (or minor) overflowing radiator or water in the oil.
Lee
----- Original Message -----
From: "Sean Simons" <sisimons@gmail.com>
To: "shotimes" <shotimes@autox.team.net>
Sent: Thursday, June 01, 2006 7:18 AM
Subject: Re: [Shotimes] HP & Torque Figures, and bad rings theory
> I know it has a weak cylinder because we ran a compression test on it. It
> *might* just be a tight valve because I still need to do a valve
adjustment.
> When we squirted some oil into the low compressing cylinder, the
compression
> numbers went up notably when we tested it again, possibly from the piston
> making a more complete seal with the cylinder.
>
> I don't think I can be sure until I pop that head off.
>
> -Sean Simons
>
> On 5/23/06, cmichaelo@optonline.net <cmichaelo@optonline.net> wrote:
> >
> > How did you know it had a weak cylinder and that it needs a new ring?
> >
> > What were the signs/symptoms?
> >
> > Michael
> > 94MTX,green,BOS+,Koni/Intrax,Baer,Corbeau
> > SHO items for sale: http://hometown.aol.com/cmichaelo/for_sale.html
> >
> > ----- Original Message -----
> > From: Sean Simons <sisimons@gmail.com>
> > Date: Monday, May 22, 2006 4:53 pm
> > Subject: Re: [Shotimes] HP & Torque Figures for 3.0 + 3.
> >
> > > You can get most info like this from the SHOtimes website. Here's
> > > a URL
> > > straight to what you're looking for:
> > > ***
> > > http://tinyurl.com/zrenk*
> > >
> > > The 3.2 is rated at the same 220 hp as the 3.0, but I think it
> > > makes it's
> > > torque earlier. Also, most commonly when people do a 3.2 swap (myself
> > > included) they put the 3.0 intake cams in. People have reported a
> > > 10 or 15
> > > hp gain. This makes sense mathimatically. It's like taking all the
> > > characteristics of the 3.0, but boring it out another 200 cc's.
> > >
> > > Mine didn't seem to have that big of an improvement, but then
> > > again mine has
> > > a weak cylinder. I wish I had re-ringed it!.
> > >
> > > Good luck.
> > >
> > > Sean
> > >
> > > On 5/22/06, Peter Maggiacomo <gtsrider@yahoo.com> wrote:
> > > >
> > > > Does anyone have the factory Hp & Torque figures for
> > > > the 3.0 and the 3.2. It would help me decide if the
> > > > swap is worth the effort. It's actually the torque I'm
> > > > looking for from the 3.2. In Florida I drive with the
> > > > AC on 365 days a year. IMO... the 3.0 is a dog with
> > > > the AC on, off the line. Any thoughts?
> > > > Pete
> > > > Tampa, Fl.
> > > > All Stock 95 MTX 93,000 original miles
> > > > _______________________________________________
> > > > Shotimes mailing list
> > > > Shotimes@autox.team.net
> > > > http://www.team.net/mailman/listinfo/shotimes
> > > _______________________________________________
> > > Shotimes mailing list
> > > Shotimes@autox.team.net
> > > http://www.team.net/mailman/listinfo/shotimes
> _______________________________________________
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