924Board.org

kaffine · Joined: 13 Jun 2003 Posts: 644 Location: Las Vegas

I just finished torqueing the head bolts on my 924. I must say I am glad they don't have to be retorqued, Had I relized how hard it was going to be I would have gotton my big ratchet from work a 3/4 inch drive. When I went through the first step in torqueing the bolts I thought this shouldn't be to bad the last head I installed the first step was the same torque value then go through and torque them to 75ft-lbs then the 90 degrees. Well when I was torqueing them to 47ft-lbs I thought this shouldn't be to bad I thought wrong apparently there isn't that many degrees between 47 and 75 ft-lbs. I was about ready to take the car off the stands for better reach I have it all the way up because this started with installing a new exhaust and didn't lower it when I pulled the head.

Tomorrow I get to install the exhaust and intake fill with coolant, set timing and fuel mixture. Then tuesday it's back to school double time.
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80 924
80 931

The best desciption of an atom boils down to something unknown is doing we don't know what.
Sir Arthur Eddington

Lizard · Posted: Mon Sep 05, 2005 12:20 pm Post subject:

good to hear,
however in regards to the torque specs,
the factory manual states, first torque setting 29ft lb, then 58ft lb, then 80ft lb and to let it sit between settings.
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3 928s,

kaffine · Joined: 13 Jun 2003 Posts: 644 Location: Las Vegas

My copy of the factory manual says for 80 and newer torque to 47ft-lbs then 90 degrees. Although I don't know how long the manual was on a shelf before I bought it so I don't know what updates it doesn't have. I should check into getting the updates.
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80 924
80 931

The best desciption of an atom boils down to something unknown is doing we don't know what.
Sir Arthur Eddington

Smoothie · Posted: Mon Sep 05, 2005 4:10 pm Post subject:

My books say 47ft-lb, then tighten an extra 180 degrees (not 90) for the torque to yield type bolts (bolts with internal serations). That's for new bolts - I'd assume you know these stretch bolts aren't supposed to be reused.

The other tightening procedure (29, 50, 80ft-lb) applies to the 931.
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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

Lizard · Posted: Tue Sep 06, 2005 11:05 am Post subject:

oops yah it was 50 not 58,
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3 928s,

kaffine · Joined: 13 Jun 2003 Posts: 644 Location: Las Vegas

It's a good thing I was reading the manual when I torqued them instead of relying on my memory. I did tighten them 180 degrees. I know they are 1 time use. I took a materials sience class last year that went into why they do that and the calculations behind it. It was a good class I only wish we got to spend more time in the lab.

I took longer than I thought to get everything back together though. I frogot to order the vacuum lines so I had to run out and get them. I did get the exhaust back on though. I need to put the timing belt and distributor on and set timing and fuel mix and then it should be a daily driver again:)

I'm waiting for my next class to start I've already been to 2 today this is definatly going to be a long semester. Hopefully I can get the 924 running tommorow between classes I only have 2 classes tomorrow so I should have enough time.
_________________
80 924
80 931

The best desciption of an atom boils down to something unknown is doing we don't know what.
Sir Arthur Eddington