Date: Mon, 22 Sep 2003 10:58:25 -0300 From: Dexter J <lamealameadingdongnopsamlamelame.org> Subject: Re: 90 Saab will not start
Salutations: Shawn wrote: > > I just checked the compression and found that two cylinders show less > than 25 the other two are 75 and 90. I am going to assume that that is > the real problem?!?!?!. Or is there something way different on a Saab?? > > lycka till! > > GTr Hey brother Shawn - that does not sound very good at all and unless it's a faulty reading - you will be getting a peak inside the heart of the beast.. BEFORE you take the head off however - pull out all the plugs and do a leak down on each piston with a compressor hose (thread an airline into the spark plug hole) - you'll need to source an automotive stethoscope to sound the block and the head.. Rotate the main pulley so you move the piston through a complete cycle for both top and bottom end.. If you can put a gauge and a metering valve set to 75pds on the line you can get a better handle on max compression each piston can carry - but - what you are really trying to figure out is where pressurized air is leaking (it may well be both top and bottom).. Repeat the cycle on all pistons several times checking for sound in the header and the intake manifold and across pistons.. The latter might be a blessing as it could mean you just have a squeaked gasket - but could also mean the rush of water cracked your head.. Conversely, if it's blowing air into the block - you might just need a ring job - or the block cracked.. Whatever the case it sounds to me like you have fairly serious problems with that engine - but in the worst case - you should be able to find a used power train for less than the cost of repair to the original engine.. It's actually a lot cheaper to pull the whole tranny and engine out and drop in another one as it kinda bolts in and out that way (be careful about matching up axles through).. For what it's worth, your experience will have me looking more closely at changing the air intake around a bit to get it proud of the main rad hoses if I go ahead and restore mine.. Cold comfort I suppose, but thanks for the head up. -- J Dexter - webmaster - http://www.dexterdyne.org/ all tunes - no cookies no subscription no weather no ads no news no phone in - RealAudio 8+ Required - all the Time Radio Free Dexterdyne Top Tune o'be-do-da-day Sammy Davis - Oo Shoo Be Doo Be http://www.dexterdyne.org/888/065.RAM
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