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Re: Viggen Engine Destruction
Posted by RobInfo [Email] (more from RobInfo) on Mon, 19 Sep 2005 19:17:34
In Reply to: Re: Viggen Engine Destruction, Fast_Ed, Thu, 15 Sep 2005 13:24:06
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Doesn't the computer record thing like overevving, I though OBDII saved all sorts of stuff regarding "exceptions"?
FWIW, my viggen lost compression on a cylinder because of overheating in the head. Apparently, overheating can cause the valve seat, which is a basically a hardened metal ring pressed into the head, to move in the head, thus preventing the valve from seating properly. Although my car never indicated any sort of overheating (i.e. temp guage never showed anything), we figured it was some sort of "localized" overheating in the valve area caused buy low coolant. I ended up getting the head rebuilt, new rings and a cylinder hone.
The only good news from the excersise was the rebuilder said the pistons, cylinder walls and bottom end looked perfect when he pulled it apart. He also said the car was scarey fast, even while taking it easy on the new rebuild. He had no idea saab made a car that ran like that, he he he...
Good luck with it.
posted by 68.36.15...
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