Question about 2003 Saab 9-3

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2003 saab 9-5 replaced head gasket because of overheat

Sent out head to be resurfaced put it all back with new head bolts and gasket now has p300 misfire on idle only 1500 rpm and up no miss can be felt

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  • Saab Master
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Disconnect computer and drive it ,if it drives ok then nothing wrong with it,after test drive put your hand held plug in gizmo under wheels and drive over it for what use it is.Skimmed head and new head bolts ?you must have more money than sense didnt you check it with a straight edge first??then clean it with a flat bed sander.head bolts ?? more expense .only expense should have been head gasket and antifreeze with a tube of instant gasket.Have you put all the little vac pipes back on that open the flaps on the air con and left the one off on the valve between the inlet and exhaust manifolds.Also did you remove and grind in the valves ??

Posted on Dec 19, 2008

  • don friar Sep 05, 2011

    this guys a ****. i wouldn't seek any advice from him.

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Yes, you can just do one head gasket, although I wouldn't recommend it.
If the head gasket has failed, it's usually because the engine has overheated. If you know that the engine has overheated, it would be best to do both heads.
When an engine overheats, the head warps a little. It doesn't take much to change the internal pressures on the gasket, and when the gasket area between the cylinders starts to lighten up a little, the gasket fails.
To do the job properly, take the head(s) to a qualified automotive machine shop and have the head resurfaced. Even a slightly warped head will be unable to keep a head gasket.
After a head has been resurfaced, it's relatively easy to put it back together.
NOTE!!
The machine shop will tell you the proper torque and torque sequence. Usually start from the center and work your way out evenly, going from side to side, and top to bottom, but get specific information for YOUR engine from the machine shop.
NEVER replace a head gasket without having the head resurfaced.

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1 Answer

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This can be done without removing the engine, but it is a bit tricky. Very tight getting the head off to the front. If you have done some mechanics, can be done. I have done this once. It did take a bit.

Please let me know if you still have the car and we can talk.

Could be a few other issues, but these are very rare. Cracked head, etc...

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