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| GMC V6 and V12 Engines Engine repair and rebuilding | 
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			#1  
			
			
			
			
			
		 
		
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			Can anyone tell me what to torque the bolts to for an Intake Manifold on a 351 V6.  I have to replace the gaskets and I am struggling trying to find proper torque information.
		 
		
		
		
		
		
		
		
		
	
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			#2  
			
			
			
			
			
		 
		
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			I'll look in the manual tomorrow morning and let you know if I find anything. It's 29 degrees right now so no way I can get outside. If I don't find any specs, I'm sure you'd be OK with German torque specs...You know, "GutenTight". 
		
		
		
		
		
		
			![]() Maybe someone else will pipe up. I know alot of the old timers have done gaskets. 
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			#3  
			
			
			
			
			
		 
		
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			Greetings, makindust! 
		
		
		
		
		
		
		
		
	
	I'm pretty sure that the intake manifold bolts would be Grade five 3/8-16 NC bolts. This type of fastener is usually torqued to 35 foot pounds, although different applications call for different torque specs. If you go to Fastenal, I am quite sure they would be able to provide you with a bolt torque specification chart. Hope this helps.  | 
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			#4  
			
			
			
			
			
		 
		
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			I just tightened mine down snugly. lol Bout 25-30 foot pounds I think is common.
		 
		
		
		
		
		
		
			
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	"Excuse the rust I use my truck" 1964 GMC 1500 305E/sm420 4 barrel intake mod and dual exhaust. To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts. 1964 Chevy C20 292/SM420 1966 Chevy C10 292 hotrod 6/TKO600 My youtube channel aka Military Chevy: To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.  | 
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			#5  
			
			
			
			
			
		 
		
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			thanks for the input, I just didn't want to get carried away and over torque and crack the manifold.  I would probably have a hard time finding a replacement.  Thanks
		 
		
		
		
		
		
		
		
		
	
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			#6  
			
			
			
			
			
		 
		
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			Motor's Truck Repair Manual Engine Tightening Specs. 
		
		
		
		
		
		
		
		
	
	list 20-25 ft. Lbs. for V6-351 Intake Manifold  | 
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			#7  
			
			
			
			
			
		 
		
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			 Quote: 
	
 And dont forget to test your torque wrench before getting started either. Ask me how I know about that. P.S. Sorry for the slow reply. Big day yesterday. 
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			#8  
			
			
			
			
			
		 
		
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			Thanks, no problem about the dslay in response.  I wasn't able to get outside to work on my truck until this evening.
		 
		
		
		
		
		
		
		
		
	
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