sounds scary to me. I would NOT want to torque the studs as the bentley says to do the stretch bolts. I think the ARP tech is not what it should be. I could be wrong, but when the torque to yeild bolts start "yeilding" it sounds bad...if you did that with a 8740 chromemoly stud I think the head or gasket would be screaming instead. Probably wouldn't be good on the blocks threads either, but I as I am not the expert I would be more inclined to listen to the raceware people.Sorry for not being more helpful on where to find the undercut stud in the original post.
When useing ARP or Raceware studs do you hand thread them in to the block and thats it or are the torqued?
I don't think I would feel secure with only 50 ft. lbs holding my head on.I torqued my ARP Ford Cosworth Sierra/Escort Head Studs to 30-50-65-80 ft lb increments.Any head stud or and head bolt needs to be torqued down gradually to prevent the aluminum cylinder head from warping. That is what I thought "multi-torquing" meant anyway. Sometimes you can loosen and re-torque to break any friction that messes up the final torque value.
I just pulled out the installation instructions for my ARP Ford Cosworth Sierra/Escort Head Stud (251-4701). It says to torque the nuts to 80 ft. lbs. w/ ARP moly assembly lube and 120 ft. lbs. w/ 30wt motor oil.
Ok guys, I have the studs and I am going to get my head drilled to allow the larger 12mm studs.Now I am faced with the problem of finding washers to fit the new 12mm bolt recess holes. I lost my old washers and my new arp washers are too large. I found a spare washer that fits in but seems a little too small.Are tight fitting washers important?
...BTW your Bieber avatar is awesome.-Malone
I guess to maybe shed some light to what I meant was....The head bolts for the vw are torqued then torqued and then through the series of 1/4 turn and 1/2 turn and 1/4 turn then the 1,000 mile 1/4 turn ...... I don't have my bentley in front of me but just from my memory that is something like it, I might have an extra 1/4 turn in there but the point is.....That is what the manufacturer calls for on their head bolts, to my knowledge there is no torque value for the head bolts. If there is let me know. If ARP or whoever says " just do what the manufacturer does for the head bolts " I think it would be too much. After the 1/2 turn I think things would start to get difficult and ugly. This is what I was thinking in my response earlier, no offense to anyone, but just the way I was thinking. The 8740 chromemoly wouldn't yeild and the aluminum head or head gasket probably would or the threads in the block might not like it. Like everything else I am probably overthinking and wrong, but I hope I am a little more clear on what I meant earlier is that ARP probably shouldn't say just do what the stock bolts call for. Lucas