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Plenum Gasket

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  #1  
Old 03-01-2005, 04:03 AM
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Default Plenum Gasket
How do I tell if i need a new plenum gasket? I look down thru the throttle body, and the bottom of the pan looks wet. Is this unspent fuel? Oil? Or should it look dry as a bone down there?
 
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Old 03-01-2005, 01:50 PM
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Default RE: Plenum Gasket
you will see oil on the bottom of the plenum, look down the throttle body to see it. there is a TSB on it as well with a test that DC gives but I hear it's not that conclusive... Plenum Leak TSB
 
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Old 03-01-2005, 02:36 PM
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Default RE: Plenum Gasket
Oh, that looks like a bitch to change....
 
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Old 03-01-2005, 02:51 PM
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Default RE: Plenum Gasket
It's easy... just takes time and patients...
 
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Old 03-01-2005, 07:50 PM
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Default RE: Plenum Gasket
I ran the test and i got 15 lbs at the breather. with the pcv port on the intkate blocked off.
 
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Old 03-01-2005, 08:53 PM
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Default RE: Plenum Gasket
also, does this effect gas mileage, and power?
 
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Old 03-01-2005, 09:21 PM
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Default RE: Plenum Gasket
yes, it affects both milage and power, you have a vacuum leak... both will suffer.
 
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Old 03-01-2005, 10:30 PM
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Default RE: Plenum Gasket
Ok, next question, how hard is the intake to get off, i am a mediocre mechanic, but i have never pulled one off a 318 truck, does the dist have to come out, or just the cap?
 
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