Torque Settings For Head Bolts

[swinney88 0]

i'm just about to put the head back on my engine after replaceing a nackard valve and looking through haynes manual for the type of head bolts that i have on my car the torx type. it tells you to tighten the bolts to 20nm slacken off then tighten up by 300 degrees. i was wondering if anyone know's the value this is e.g 90nm.

Edited November 11, 2008 by swinney88

[Pob 1]

i'm just about to put the head back on my engine after replaceing a nackard valve and looking through haynes manual for the type of head bolts that i have on my car the torx type. it tells you to tighten the bolts to 20nm slacken off then tighten up by 300 degrees. i was wondering if anyone know's the value this is e.g 90nm.

 

I thought it was 60nm, slacken off 20nm then 300 degrees?

 

Although as documented on the Puma racing engine website

 

http://www.pumaracing.co.uk/PUG2058V.htm

 

Never used this method so carn't comment, but I'm sure someone on here has. I might use this method when I do the head on mine

 

Dan

Edited November 11, 2008 by jackherer

[DamirGTI 344]

Now , personally im using this one :

 

1. stage - 30Nm

2. stage - 55Nm

3. stage - loosen each bolt 1/8th turn and re-tighten back to 55Nm

4. stage - 80Nm

5. stage - 95Nm (70lbf ft)

 

http://forum.205gtidrivers.com/index.php?s...6&hl=torque

 

Damir

Edited November 11, 2008 by jackherer

[jord294 94]

i always torque to 60nm, slacken off, torque to 20nm, and then 300 degrees, and then a gentle nip again with bar

 

never had any problems with that way of doing it

[pug_ham 245 3 Cars]

I used the autodata torque figures & method on mine;

 

Torque to 60nm, slacken off, torque to 20nm, and then 300 degrees but for the final 300' stage I do each bolt 100' at a time in order & as yet its been fine on the three engines I've done.

 

Graham.

[jeremy 71]

When you do up the head bolts, DO NOT just do the first one up by 300 degrees as this will then most likely shear speaking from experience. Do them all up gradually in sequence, as this way they will then all do up 300 degrees.

[matty_gti 20]

I used the pumaracing method and thats been fine for me.

[CosKev 16]

i always torque to 60nm, slacken off, torque to 20nm, and then 300 degrees, and then a gentle nip again with bar

never had any problems with that way of doing it

 

LOL,you should try to undo the fookers though!!!!!!!!

Broke two torx bits in the process

 

I used the pumaracing method and thats been fine for me.

 

Thats what I am doing