Can anyone tell me the best exhaust manifold bolts to use on my 390? I'm keeping the stock manifolds, but will eventually get headers one day. Just don't want to go through the problem with broken bolts again. Thanks for any help!
Isn't the ARP brand considered among the best? Lots of good torque info there too. http://www.arp-bolts.com/
If you want to keep bolts, use only grade 8 bolts with never seize on the bolt threads. Chase the threads in the cylinder heads before you reinstall them.
Stay away from stainless steel bolts. The will not stay tight. Standard grade 8s with anti-seize work just fine.
I fold the towels, the sheets, and there are many folds. Too late now to change the language, but even olde english had manifold expressions for some words, not engine plumbing. In fact, I don't think other languages use a similar word for what is a multi-branch piece of plumbing. (Male PMS?) Yeah, the plumbing and HVAC industries use it, but only because the automotive industry were first to describe it using what was basically an adjective to describe several options for a word, an article (including these multi-fingered pieces of tubing. Exhaust Header sounds correct(er).
Thanks for the info guys, but... stupid question... where can I get these grade 8 bolts? My local Autozone has the kit, but it doesnt say grade 8. Does somebody carry the bolt kit or is this a hardware store run? Thanks again!
Yup, they WON'T stay tight I'm a bit confused, did you ask them if the bolts were grade 8 and do they have grade 8 on the shelf/nuts "n" bolts rack? Just seems wierd that a auto parts store does'nt have grade 8s, I can get them in here (auto store) no problem
http://www.smithfast.com/bolts.htm This page has a chart that shows the different markings on the cap. Grade 8's have 6 marks, one on each corner. Oh here's a better chart: http://www.americanfastener.com/technical/grade_markings_steel.asp
Some hardware stores carry them as does Tractor Supply if you have one of those in your area. Industrial supply places also carry them or a dedicated fastener store. (we have 2 of those around here) As previously mentioned, they have six equally spaced hash marks on the bolt head, and are usually (but not always) gold anodized.
