Mechanics

INTAKE MANIFOLD

1991 GMC Suburban

Engine Performance problem
1991 GMC Suburban V8 Two Wheel Drive Automatic 223450 miles

How can I tell if the intake manifold gasket is leaking?
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Taco56
August 17, 2009.



Spray it with soapy water on the intake manifold mating surface if it bubbles up and the idle is steady the leak is right there or use propane also the vacuum gauge method

Rasmataz
Aug 18, 2009.