Guest TurboSedan Posted June 17, 2005 Report Share Posted June 17, 2005 i am going to be putting the TGP heads back on my 3.1 later this week. i will be using Fel-Pro head bolts and Fel-Pro head gaskets. should i cover the head bolts in a light coating of motor oil before installing them? last time i put them in dry, and torqued them to 90ft/lbs. is 90ft/lbs too tight? thanks Quote Link to comment Share on other sites More sharing options...
19Cutlass94 Posted June 18, 2005 Report Share Posted June 18, 2005 I dont know about using the motor oil on the head bolts, dont know of anyone whose done that before, if anything, a little lock-tight would be good. As far as 90ft/lbs, I dont even tighten my lug nuts on my wheels that much, there only 75-80ft/lbs, 90ft/lbs seems a little high to me..... Quote Link to comment Share on other sites More sharing options...
Guest TurboSedan Posted June 18, 2005 Report Share Posted June 18, 2005 yeah i've heard some people lightly coat them in oil and some don't. so far i'm thinking i'll install them dry again and torque them to 80 ft/lbs. anyone else want to chime in? i will probaby be installing the heads within 2-3 days... damn i can't wait to drive this car again!! Quote Link to comment Share on other sites More sharing options...
Brian P Posted June 18, 2005 Report Share Posted June 18, 2005 The head bolts aren't torqued to a value altogether. It's done to 30 or 33 I can't remember, but you then tighten them all an additional 90 degrees. As for using oil on the threads I didn't do that, but I did put RTV on the threads and below the base of the head of the bolt. Quote Link to comment Share on other sites More sharing options...
Canada Posted June 18, 2005 Report Share Posted June 18, 2005 Josh, use oil. Do NOT use RTV or locktight.....or anything like that, those are all bad ideas. Here is why.... A torque spec is given to get a certain clapping load....thats it. However, this is based on the fact that the threads can turn as free as possible....adding anything that shouldn't be there (RTV/Locktight) increases the amount of torque it takes, thus the bolt doesn't have as much as it properly shoud. Threads of the bolts should be cleaned with a wire brush or wheel and then dipped in good old engine oil and installed via spec in the proper order. I believe 60degreeV6 has these specs listed. Any of GM's 5 or 6 bolt wheels that use 3/4"/19 mm wheel nuts should be torqued to 100 ft-lbs. That is the specification via GM, use anything else and you might loose a wheel. Quote Link to comment Share on other sites More sharing options...
Guest TurboSedan Posted June 18, 2005 Report Share Posted June 18, 2005 thanks guys. i just picked up a set of Fel-Pro 9471PT head gaskets today and i pick up new head bolts tomarrow. i have the next three days off work so i should make alot of progress. btw, last time i did the head gaskets i think i torqued them to 30 ft/lbs plus an additional 90 degree turn (and i tightened them in the proper sequence of course). before i tightened the bolts an additional 90 degrees, i set the torque wrench to 90 ft/lbs to see if it actually got that high. most of them did, so i simply torqued all of them to 90 ft/lbs. i'll probably be posting new pics in my thread in the Member's Rides section later this week. i hope to be driving this car by July 1st, and make it to the track with sl3196, timg, and my brother sometime in July Quote Link to comment Share on other sites More sharing options...
DaveFromColorado Posted June 19, 2005 Report Share Posted June 19, 2005 .. here's a rule of thumb... always use a light coating of 10w30 motor oil on the head bolts UNLESS they go into the water jacket, in which case, you use a LIGHT coating of RTV if you follow that procedure, you will almost never have a problem with torquing the bolts, if you do NOT follow that procedure, you will be more likely to have a premature head gasket failure. --Dave. Quote Link to comment Share on other sites More sharing options...
Guest TurboSedan Posted June 19, 2005 Report Share Posted June 19, 2005 ok i finally found my old post back when i did this job last January....i tourqued the head bolts to 33 ft/lbs with an additional 90* turn, which was basically 90 ft/lbs... http://www.w-body.com/forum/viewtopic.php?t=24846 however, the 60*V6 site says to tighten them to 41 ft/lbs plus an additional 90* turn. that almost seems too tight. i think i'm just going to lightly coat the new head bolts in 10w30, then tighten them to 33 ft/lbs with another 90* turn and call it good. thanks Quote Link to comment Share on other sites More sharing options...
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