head bolts ?

M

merc40

Member
8ba engine. edelbrock heads, do i need different size bolts. i hear they need longer ones. stock bolts look like they are long enough to me. reguards dick t.
 
Play it safe and get new head bolts. grade 8 with hardened washers. I think ARP has them. I recall once I was reusing an 8BA headbolt and I actually felt it stretch as all of a sudden the torque wrench turned real easily. I carefully backed it out and could actually see where the OD thread dia. had begun to "neck down".
 
Torking the head bolts to 45/50 lb/ft of torque requires only a grade #5 bolt, unfortunatly these have 5/8 heads, the grade#8 have 11/16. When installing these in aluminum heads a hardened washer should be used and the bolts/studs should have a minimun of 7 thread engaugements. You must check for bottoming in the blind holes in the block over the exhaust ports. Caution torquing over 50 ft/lbs ann distort the block and is unnecessary.
 
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