DutchEdwin Posted March 29, 2007 Report Posted March 29, 2007 Hi all, who can help me on my head bolts, I understood these are grade 4 bolts. I like to have new ones. Hotheads has grade 8 but only for hemi's. Mine is shorter. the size is, 1/2 inch bolt. (115mm) 4.5 inch long. See drawing. Quote
Norm's Coupe Posted March 30, 2007 Report Posted March 30, 2007 Edwin, Try your local shops over there. Take one of your old head bolts in with you and try to match it up with some other engine. For example for our flathead 6 cylinder engines we can use Chevy 350 head bolts. Chevy 350's have two different sizes though. Maybe that other size will fit your engine because some of the 350's have taller heads than the others. If that fails you might find head bolts at Totally Stainless. They have all kinds of bolts for engines. I just looked at their online catalog index and they do list the Early Small Block Mopar engines. I didn't go any further because the catalog is 128 pages and would take me forever to download on dial up. Their web site is http://www.totallystainless.com Quote
1just4don Posted March 30, 2007 Report Posted March 30, 2007 I am NOT familiar with grade 4 bolts ,,,here anyway. Either we buy grade 2's , 5's, or 8's here,,,never saw anything inbetween. Might be special bolts above grade 8 but not in the real world. Anything else you will get an eyebrow roll from our great educated kid store keeper dont knows,but will ask,,,,get back to ya laters. If a mature knowledgeable fellow applied for same position,,,doesnt get a stray blink. My guess is probably a grade 5,,dunno for sure. Standard way to tell is grade 2 generally has no marks on the head,,,grade 5 has three marks on head,,,and generally grade 8 has 6 marks on the head of the bolt. Never saw any different 'here',,, except metric bolts which have a system all of their own!!! Now it is said there are alot of foriegn bolts counterfited thru the USA by copying the same marks but not having the right properties. It is legal to make counterfiet bolts overseas and selling them here after going thru a half dozen bolt brokers for cleansing purposes,,,then they are all made in the USA!!! Manufactures also have there own marks. Point of this whole tirade is,,,make sure what you are using,,,bad place for bad bolts. -d- Quote
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