Question about 1998 Buick Century

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1996 gmc with a 5.7 vortech. how can i tell if the intake gaskit is leaking

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Spray carb cleaner around gasket. detect change in idle. if no change it is not leaking. also listen for hi pitched squeal at idle that decreases with accelaration

Posted on Apr 12, 2009

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I'd be willing to bet your intake gaskets are leaking. Does the truck have a 4.3L vortec motor? If you get underneath it and the transmission bellhousing is wet with coolant it's probably leaking out the back of the intake. Intake gaskets were a very common failure on those motors and GM has actually redesigned them using different materials. I just did one thursday, about $50 in parts and about 5 hours in labor.

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1998 gmc jimmy


If your engine is a Vortech, most likely you have an intake leak going on. This is very common with the 5.7L Vortech and the 4.3L Vortech. A leaking intake will causing one side of the engine to lean and the other side will be normal.

Oct 24, 2008 | 2000 GMC Jimmy

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