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gmc396 · 08-27-2016, 10:55 AM

I've got a '68 GMC C2500 with a 396 and Rochester GMV carb and 4-speed. I was fine tuning the idle mixture screws and noticed some gas on the intake manifold after I drove the truck. It looks like the idle mixture screws are leaking a bit. Is there a small donut gasket in the hole where the mixture screws go? Any suggestions on how to stop the leak? I finally got the truck set up and would rather not pull the carb. Thanks for your help.

08-27-2016, 10:55 AM	#1
gmc396 Registered User Join Date: Aug 2013 Location: Ephraim, WI Posts: 48	Idle Mixture Screws Leaking I've got a '68 GMC C2500 with a 396 and Rochester GMV carb and 4-speed. I was fine tuning the idle mixture screws and noticed some gas on the intake manifold after I drove the truck. It looks like the idle mixture screws are leaking a bit. Is there a small donut gasket in the hole where the mixture screws go? Any suggestions on how to stop the leak? I finally got the truck set up and would rather not pull the carb. Thanks for your help.