vacuum leak question
Thread Starter
Racer
Joined: Jan 2008
Posts: 299
Likes: 4
From: Surprise AZ
vacuum leak question
66 427 390, changed the carburetor base gasket (mr. gasket type) looked a little thin, reused the metal baffle plate and have a vacuum leak now. Are those metal baffle plates reuseable? Thanks 
Team Owner
Joined: Feb 2003
Posts: 54,139
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From: Sitting in his Nowhere land Hanover Pa
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Yes the metal baffle is reusable. Did you put them in the correct order. Did you check and make sure the mating areas are flat and true?
Team Owner
Joined: Feb 2003
Posts: 54,139
Likes: 9,447
From: Sitting in his Nowhere land Hanover Pa
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2015 C2 of Year Finalist
not sure without looking in the AIM that I don't have around me. if something is warped you would need to get it planed off. did you make sure the metal baffle was cleaned off.
also did you make sure your vacuum advance can is in working order
also did you make sure your vacuum advance can is in working order
Melting Slicks
Joined: Jun 2012
Posts: 3,115
Likes: 196
From: Wilton Ca.
Could be a warped carb base. Are you sure you didn't have a leak before? I ask because you don't say why you replaced the gasket. If not, try tightening the base nuts a bit more but NOT real tight then check it again.
Melting Slicks
Joined: Jun 2012
Posts: 3,115
Likes: 196
From: Wilton Ca.
You might get lucky with a thicker gasket. BTW, did you check your advance can as Nowhere Man suggested? If so, I would remove the carb, since it sounds as though you've confirmed that's the location of the leak, and run a straight edge across the underside of the base plate, checking across the bolt holes as well, and intake. If in fact the base is warped which, btw is quite common, I'd recommend sending it out to Eric Jackson for a rebuild since it most likely needs a few other things addressed. If its the manifold you could have it planed at a machine shop.
Last edited by Gary's '66; Sep 10, 2014 at 10:30 PM.
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Drifting
Joined: Apr 2011
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From: Australia
They're thick, but if the base is warped, it probably wont fix it
Corvette America # 33150 $5.00
Team Owner
Joined: Feb 2003
Posts: 54,139
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From: Sitting in his Nowhere land Hanover Pa
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Also there is no need to mail order gaskets. They are very common size and any decent parts store will have them