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[QUOTE=Spoolin,Sep 27 2010, 02:41 AM] It's not supposed to be torqued to 90 ft lbs with the molylube, its supposed to be torqued to 80 ft lbs per ARP. I just did a buddies head with ARP headstuds and confirmed the torque on the sheet they sent with the studs.
Well when I put in a new HG, I'm going to torque them to 142 ft lbs lol. I will make sure they are 90 ft lbs for sure. Now I just gotta find some ARP moly lube I think I might have some left over. Is there a shelf life on the lube?
Should I take the studs out of the block and re install them? I don't think it would make a difference since they are already in there pretty tight.
Originally Posted by 1SlowSi,Sep 27 2010, 05:55 AM
Well when I put in a new HG, I'm going to torque them to 142 ft lbs lol. I will make sure they are 90 ft lbs for sure. Now I just gotta find some ARP moly lube I think I might have some left over. Is there a shelf life on the lube?
Should I take the studs out of the block and re install them? I don't think it would make a difference since they are already in there pretty tight.
Run a clean-out took (tap) through the threads to make sure they are clean of any debris.
There are only a few things that cause a h/g to fail.
We know it wasn't the head lifting, unless you didn't tq it correctly, nor did you overheat.
So unless your deck isn't straight, it's detonation.
One other thing I ensured was to use a airgun with a rag and blow any engine oil out of the holes for the headstuds and there will usually be alot of oil that ran into these when taking the head off. Otherwise when you put the head on and screw in the headstuds, you have oil spewing out all over the HG before it even gets a chance to seal itself.
The motor had 4k miles on it when he put the HG on but he may have torques to Honda spec and not arp, it will remain uncertain. The pistons/plugs show no sign of detonation. Being that it was an Acura tech that did it maybe he went off of OEM spec. No one will ever know what really happened so now it's a fresh start. I'm sure the head is fine so I'll probably just buy the HG today an get it all back together. I will do a visual inspection and use a straight edge with feeler gauges to test but only 4-5 pulls and pop of the headgasket, I highly doubt the head got warped or damaged in any way.
o'malley. im usually with ya my brother, but you are only half right bro.
here is ARP's chart directly from their website. they explained to me that they find the recommended torque value based on stretch in the block the studs are going into. weather it has a 1mm spacer or a 7mm spacer, the stud will still stretch the same so the values will remain the same.
they rate their studs in PSI tensile strength. our studs are rated at 195,000-200,000. and accordingly, they are listed at 80ftlbs.
the same sized stud in a 220,000 psi stength is listed at 90. but the 220,000 stud isnt sold for the s2000.....
so, as per your request, i called ARP. and the guy said to "follow the values listed on the paper inside the box the studs came in". i told them someone had one with a 90ftlb rating and someone else with a 80ftlb rating. he said, "unless you bought 220,000 psi studs that werent model specific, the paper for ANY s2000 should list 80ftlbs". ALSO, I think his name was zack or something... i forgot, he said "there are 2 different types of lube listed for those 80 or 90 specs. if you have a set that is very outdated, it may have come with "Ultra Torque" lube which would require 90ftlbs. but every kit that has been sold in the last 5-7 years has been listed and sold with "MOLY" Lube and an 80ftlb setting for your studs".
I think I might have some left over. Is there a shelf life on the lube?
