TQ spec for head bolts?

[pgriffith]

WHats the torque spec for head bolts on the 3.8? I forget?????????

[Andy H]

well for a 1998 in my book it says, step 1 torque 37 foot lbs. step 2 turn additional 130 degrees. step 3 turn center 4 bolts only an additional 30 degrees. here's a picture that shows the sequence. pic1

[pgriffith]

why do they say to turn 130 degrees past that. Why cant they just give an exact Tourque number?

[Andy H]

They want you to do this in 3 steps and follow the torque sequence for each step. They want you to tighten each bolt a little bit at a time not all at once. I guess they could have said something like step 1 torque to 37 and step 2 torque on up 90 or whatever. I got this info from a haynes repair manual. Maybe someone else has a book that gives an exact number?

[pgriffith]

<blockquote>quote:</font><hr>Originally posted by Andy H:
They want you to do this in 3 steps and follow the torque sequence for each step. They want you to tighten each bolt a little bit at a time not all at once. I guess they could have said something like step 1 torque to 37 and step 2 torque on up 90 or whatever. I got this info from a haynes repair manual. Maybe someone else has a book that gives an exact number?<hr></blockquote>


3 steps? 3 steps of what? Dude spell this out for me. Dont tell me my head gasket leaks because last time I tightend them 37 ft. pounds then 130 degrees and left it at that. Please spell this out for me.

[Andy H]

ok
step 1. follow the sequence from the pic i posted and tighten all bolts to 37 foot lbs.

step 2. follow the sequence and tighten all bolts an additional 130 degrees.

step 3. follow the sequence and tighten center bolts 1-4 only an additional 30 degrees.

that's it. hope this helps [img]smile.gif[/img]

[pgriffith]

<blockquote>quote:</font><hr>Originally posted by Andy H:
ok
step 1. follow the sequence from the pic i posted and tighten all bolts to 37 foot lbs.

step 2. follow the sequence and tighten all bolts an additional 130 degrees.

step 3. follow the sequence and tighten center bolts 1-4 only an additional 30 degrees.

that's it. hope this helps [img]smile.gif[/img] <hr></blockquote>

Ok so center 4 bolts are an additional 160 degrees total between the two different steps right?

[Andy H]

yes that's correct

[pgriffith]

Andy your so much help thanks buddy, And what do I use to measure the degrees? Or do I just eyeball it?

Last time I eyeballed it and screwed up so maybe this time I should get a tool.

[Andy H]

I would just eyeball it, im not sure where you would get a tool for it.

[kaygee08]

<blockquote>quote:</font><hr>Originally posted by pgriffith:
Andy your so much help thanks buddy, And what do I use to measure the degrees? Or do I just eyeball it?

Last time I eyeballed it and screwed up so maybe this time I should get a tool.<hr></blockquote>

Use a torque angle gauge, here is an example:
http://cgi.ebay.com/ws/eBayISAPI.dll...tem=2046121251

[Magnus]

I eyeballed mine.. but a tool is recomended.

[DEE97GTP]

<blockquote>quote:</font><hr>Originally posted by Andy H:
I would just eyeball it, im not sure where you would get a tool for it.<hr></blockquote>

Autozone, napa, should all have one. Only like $10 or so. Well worth it.

DEE

[pgriffith]

I have been told to retourqe them after the engine has been hot. Is this neccassary?

[DEE97GTP]

<blockquote>quote:</font><hr>Originally posted by pgriffith:
I have been told to retourqe them after the engine has been hot. Is this neccassary?<hr></blockquote>

That is nowhere in the manual. How much would you retorque them anyway? Being that you turned them a certain number of degrees. I think that is BS.

I never heard that on head bolts, but I know for instance if you are using rockers with non torque to yield bolts, that it is good to tighten them down one you get the engine warm. We do this on my friends racecar, a bit of a PITA.

FWI, I didn't, and it has stood up to 13psi and all.

DEE