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tuurbo · Posted: Thu Nov 29, 2007 12:39 am Post subject: Head re-torque questions

Hi there - I had my engine rebuilt in the fall and haven't had it re-torqued yet.

Question: Does it 'need' to be done if there's no problem?

Question: Do I just torque the bolt or do I loosen it first, then re-torque? I think the former is what I should do, but I just wanted to get some confirmation.

Thanks!

Smoothie · Posted: Thu Nov 29, 2007 1:44 am Post subject:

Tigger937 gives the procedure here, under "TIGHTENING SPECIFICATIONS FOR CYLINDER HEAD BOLTS - 924 TURBO" - http://www.924board.org/viewtopic.php?t=18369
If the rebuilder did this, there's no need to re-torque.
If you don't trust them, follow step #2 in that post with the engine cold.
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"..it's made in Germany. You know the Germans always make good stuff."

'82 924T, US version, dark green metallic, 5 speed Audi 016G gearbox

tuurbo · Posted: Sat Dec 22, 2007 8:26 am Post subject:

Ok I don't trust that 2 was done so I will do this:

2. Retighten cylinder head bolts after at least 60 minutes (to allow for setting of cylinder head). To do so, loosen bolt no. 1 (see tightening sequence) approx. 1/2 a turn and tighten to 110Nm. Repeat this procedure with the remaining bolts in the prescribed sequence.

Bring engine up to operating temperature (oil temperature approx. 80°C). Allow engine to cool and give cylinder head bolts a final tightening as described under 2.

Hope that's right - please let me know if I'm off the mark.

Thanks!
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1980 924 turbo, MSD, Meth. Inj, otherwise stock.

tuurbo · Posted: Sat Dec 22, 2007 1:54 pm Post subject:

I just got me a brand new 1/2" drive torque wrench 20 - 150 ft/lbs $18.99 - it doesn't get better than that! Woo hoo I can almost feel the boost now...

I hate paying for mechanics. Half the time they don't do a complete job, they leave stuff undone, lean on the paint, they don't check things like they give a damn.

I don't know how people keep these cars and pay mechanics for all the work - doing it yourself is the way to go if you can do it.
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1980 924 turbo, MSD, Meth. Inj, otherwise stock.

emoore924 · Joined: 13 Apr 2004 Posts: 2822

There are times when you want to spend a few bucks on a tool -- the torque wrench is one of those times. I'm not sure what you bought but I'd strongly recommend that you have it calibrated before you do something like torque your head bolts or you might have an "unpredictable results" situation to deal with.

Again, just a sugggestion.

tuurbo · Posted: Mon Dec 24, 2007 1:02 am Post subject:

Good point yeah - the wrench comes with a certificate of calibration done August 24/07 but it's certainly worth doing it again to be absolutely sure.

The last thing I want or can afford is to bust my head because I cheaped out.