head bolt idea

MA70-3.0GT · 12-12-2010, 05:03 PM

why helicoil? didn't see anything about stripped threads???

Anyway I'd say don't do anything if it's not blown. (and certainly DON'T take the bolts out one at a time or in any other order than by the book!!!) Just wait till the first signs of it going (and it will eventually) and then follow the tsrm replacement guide but either use upgraded bolts/studs following their torquing instructions, or use new stock bolts (which are fine) just following the upgraded torque level & not the original 58lb rubbish

And when done, remember to burp the cooling system unless you enjoyed it so much you wanna do it all over again next week...

Green7mgte · 12-12-2010, 10:46 PM

why helicoil.. so they don't back out. or something else along those lines.
don't see why thats such an awful idea.
here.. buy concrete lag bolts and shove those babys in there.. they won't back out. hows that for bad ideas.

there is no problem with re torquing your head bolts. if you want to do it, just do it correctly. waiting untill you see signs of a BHG to start applying fixes is two steps backwards in theory and in pocket. if re torquing them now will save you failure in the future i see no reason not to do it, besides the guy above me saying not to.. =)

907mge · 12-13-2010, 12:53 AM

Helicoils don't stop bolts from coming back out. They are for when the threads are no longer useable and you still want to use the same bolt size as the original. They work well but the hole must be drilled out larger.

It is hard to say though without the milage and age to see if the hg may have already been done. Since a 20 plus year old car can get passed around alot over the years.

Green7mgte · 12-13-2010, 08:34 PM

yes im well aware of what they are. just stating they are a solution if your having problems with your bolts backing out..

so uh

. yea if you can get away with the same size bolt do it.. but if you have to retap them to a larger size just be slow and careful with it. make sure your bit is level for god sakes.

is the op even reading this thread any longer?

907mge · 12-13-2010, 09:26 PM

It can suck if you have to go with a larger size though if the hole for the bolt in the head is not large enough for the new bolt. I unfortunatly learned alittle on the subject when my brother and I did the hg on a 93 cavalier and snaped off 2 head bolts in the block.

I don't think the op is on here anymore. It seems we get quite a bit of new people that post a few times and dissapear.

Green7mgte · 12-13-2010, 09:48 PM

i have a stripped exhaust bolt. i just used a concrete lag bolt lol..

907mge · 12-13-2010, 09:51 PM

What ever works for you. Me personally, am a bit of a perfectionist and that would bother me.

12-12-2010, 05:03 PM	#1
MA70-3.0GT 12psi boost Join Date: Oct 2009 Location: Crewe, England Posts: 356	why helicoil? didn't see anything about stripped threads??? Anyway I'd say don't do anything if it's not blown. (and certainly DON'T take the bolts out one at a time or in any other order than by the book!!!) Just wait till the first signs of it going (and it will eventually) and then follow the tsrm replacement guide but either use upgraded bolts/studs following their torquing instructions, or use new stock bolts (which are fine) just following the upgraded torque level & not the original 58lb rubbish And when done, remember to burp the cooling system unless you enjoyed it so much you wanna do it all over again next week... __________________ '89 MA70 Supra GT aero 3.0turbo JDM, Rebuilt motor, K&N intake, 3" stainless turbo-back. New turbo and braided line kit... '89 Honda NC27 400, NC23 cams, open pipe, PC36a shock & possibly Showa USD forks... '83 Yamaha 29R XJ750E-II, number 69 off the line, only runner in the country? Original except Koni shocks '95 Honda PC26 CB500R, Winter hack, hateful, trying to sell it I'm not paranoid, they really ARE after me!!!

12-12-2010, 10:46 PM	#2
Green7mgte Supra Forum Moderator Join Date: Nov 2009 Location: Green-Ohio Posts: 1,297	why helicoil.. so they don't back out. or something else along those lines. don't see why thats such an awful idea. here.. buy concrete lag bolts and shove those babys in there.. they won't back out. hows that for bad ideas. there is no problem with re torquing your head bolts. if you want to do it, just do it correctly. waiting untill you see signs of a BHG to start applying fixes is two steps backwards in theory and in pocket. if re torquing them now will save you failure in the future i see no reason not to do it, besides the guy above me saying not to.. =) __________________ 92 Ma71 7mGTE Auto. SafcII Supra FAQ Supra MKIII FAQ Classified Section guidelines : Last edited by Green7mgte; 12-12-2010 at 10:52 PM.

12-13-2010, 12:53 AM	#3
907mge 20psi boost Join Date: Dec 2009 Location: Harrisburg Posts: 759	Helicoils don't stop bolts from coming back out. They are for when the threads are no longer useable and you still want to use the same bolt size as the original. They work well but the hole must be drilled out larger. It is hard to say though without the milage and age to see if the hg may have already been done. Since a 20 plus year old car can get passed around alot over the years. Last edited by 907mge; 12-13-2010 at 12:56 AM.

12-13-2010, 08:34 PM	#4
Green7mgte Supra Forum Moderator Join Date: Nov 2009 Location: Green-Ohio Posts: 1,297	yes im well aware of what they are. just stating they are a solution if your having problems with your bolts backing out.. so uh . yea if you can get away with the same size bolt do it.. but if you have to retap them to a larger size just be slow and careful with it. make sure your bit is level for god sakes. is the op even reading this thread any longer? __________________ 92 Ma71 7mGTE Auto. SafcII Supra FAQ Supra MKIII FAQ Classified Section guidelines : Last edited by Green7mgte; 12-13-2010 at 08:37 PM.

12-13-2010, 09:48 PM	#6
Green7mgte Supra Forum Moderator Join Date: Nov 2009 Location: Green-Ohio Posts: 1,297	i have a stripped exhaust bolt. i just used a concrete lag bolt lol.. __________________ 92 Ma71 7mGTE Auto. SafcII Supra FAQ Supra MKIII FAQ Classified Section guidelines :

12-13-2010, 09:26 PM	#5
907mge 20psi boost Join Date: Dec 2009 Location: Harrisburg Posts: 759	It can suck if you have to go with a larger size though if the hole for the bolt in the head is not large enough for the new bolt. I unfortunatly learned alittle on the subject when my brother and I did the hg on a 93 cavalier and snaped off 2 head bolts in the block. I don't think the op is on here anymore. It seems we get quite a bit of new people that post a few times and dissapear.

12-13-2010, 09:51 PM	#7
907mge 20psi boost Join Date: Dec 2009 Location: Harrisburg Posts: 759	What ever works for you. Me personally, am a bit of a perfectionist and that would bother me.

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