Head torque settings

[sm-slider]

Hi Guys

I need a bit off information,1996 Mercedes 312d 2.9 TD, 602 engine 5 cylinder head torque settings, or point me in the direction of an online manual??

Thanks

[mbdoc]

In my MB tech book all 602 engines have the same torque settings for the cylinder head.

you torque the head in 5 stages!
1) 15nm
2) 35nm
3) 90deg rotation of the bolt
4) wait 10 minutes
5) 90deg angle of rotation
Usa a solid breaker bar to do the angle of rotation stages

Start in the middle & work back & forth across the head working to the outside.

A little secret, after the first two stages put a paint dot on each bolt facing the intake. after the first angle(stage 3) the paint dots will be pointing forward & after stage 5 they will be towards the exhaust! That way you will be assured that they all got the same torque!

[sm-slider]

big thanks

[hodad]

Hello Sir, mine is a 93 300D 2.5 which is a 602, I replaced gasket and
I see your response what is the settings on the torque wrench or you just saying last 2 stages are 1/4 turn, wait 10 minutes then 1/4 turn again?
I am assuming

Originally Posted by mbdoc

In my MB tech book all 602 engines have the same torque settings for the cylinder head.

you torque the head in 5 stages!
1) 15nm
2) 35nm
3) 90deg rotation of the bolt
4) wait 10 minutes
5) 90deg angle of rotation
Usa a solid breaker bar to do the angle of rotation stages

Start in the middle & work back & forth across the head working to the outside.

A little secret, after the first two stages put a paint dot on each bolt facing the intake. after the first angle(stage 3) the paint dots will be pointing forward & after stage 5 they will be towards the exhaust! That way you will be assured that they all got the same torque!

[Hirnbeiss]

After step 2, torquing to 35 NM, you don't need a torque wrench. Use a breaker bar or long ratchet to turn the bolts. Try to be as precise on the 1/4 turns as you can. You are stretching the bolts to pre-determined amounts to achieve a specified clamping force.