Headers on a 454 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

ghostflyer · 03-27-2012, 08:59 PM

I'm in the process of putting a set of headers on my 86 1-ton. I removed the factory SS headers with great difficulty. (every bolt was seized). I'm wondering about the torque for the header bolts. The manual says to torque cast iron manifold to 18 lb-ft and the SS ones to 40 lb-ft. Quite a difference!

Since the headers are built with a plate like the factory SS manifolds, should I use the 40 lb-ft for the headers also. Seems like a lot for those small bolt heads (3/8").

Thanks,
Les

03-27-2012, 08:59 PM	#1
ghostflyer Registered User Join Date: Oct 2011 Location: Olympia, WA Posts: 23	Headers on a 454 I'm in the process of putting a set of headers on my 86 1-ton. I removed the factory SS headers with great difficulty. (every bolt was seized). I'm wondering about the torque for the header bolts. The manual says to torque cast iron manifold to 18 lb-ft and the SS ones to 40 lb-ft. Quite a difference! Since the headers are built with a plate like the factory SS manifolds, should I use the 40 lb-ft for the headers also. Seems like a lot for those small bolt heads (3/8"). Thanks, Les



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