Exhaust manifold nearly hitting frame - The 1947 - Present Chevrolet & GMC Truck Message Board Network

AirSpeed · 12-17-2009, 02:25 AM

I was looking at the engine in my new to me 72 GMC 4X4 and noticed the passenger side exhaust manifold was sitting only a 1/4 inch from the frame, the drivers side is about 1/2 inch way. I had my wife rev the engine to see if it moved or came in contact with the frame and it does not. How common is this? Should I change the motor mounts?
Thanks! Aaron

**kwmech** · 12-17-2009, 04:20 PM

That's where I would start

mindhive · 12-17-2009, 04:37 PM

If its not hitting anything I wouldnt worry about it. My BB headers have less room than that, but I havent ran it yet to see how much it moves with new engine mounts. If it does touch I will just clearance the frame a bit.

Tim

12-17-2009, 02:25 AM	#1
AirSpeed Registered User Join Date: Jul 2007 Location: Fall River California Posts: 2,026	Exhaust manifold nearly hitting frame I was looking at the engine in my new to me 72 GMC 4X4 and noticed the passenger side exhaust manifold was sitting only a 1/4 inch from the frame, the drivers side is about 1/2 inch way. I had my wife rev the engine to see if it moved or came in contact with the frame and it does not. How common is this? Should I change the motor mounts? Thanks! Aaron

12-17-2009, 04:20 PM	#2
kwmech Senior Member Join Date: Mar 2003 Location: Colfax-California Posts: 8,650	Re: Exhaust manifold nearly hitting frame That's where I would start

12-17-2009, 04:37 PM	#3
mindhive Registered User Join Date: Jul 2003 Location: Mountain Home ID Posts: 85	Re: Exhaust manifold nearly hitting frame If its not hitting anything I wouldnt worry about it. My BB headers have less room than that, but I havent ran it yet to see how much it moves with new engine mounts. If it does touch I will just clearance the frame a bit. Tim



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