4 replies to this topic

[lanvid]

Hi

 

I used "search" but more i read less i understand. I am changing the head gasket (payen 450) on my 1275 A+ from an rover cooper 1991.

 

Can you please let me know if the 9 original studs have to be torquened down?if yes how much Nm? Or only tightened by hand, like i read in some posts?

 

Thank you very much

Edited by lanvid, 13 October 2020 - 06:22 AM.

[steeley]

Should be torqued down, check Haynes manual for sequence

Originally posted by cooperman, this what I have always done too


Torque up on initial fitting using the correct sequence to 30 lb.ft, then 40 lb.ft. then finally 50 lb.ft. Set valve clearances accurately using 'rule-of-nine'.
Run engine through a few heat cycles, or drive for around 100 to 200 miles, then loosen each nut in turn by 1/2 a turn and re-torque to 50 lb.ft. Just do one nut at a time, but still in the correct sequence.
Finally re-set valve clearances again, check coolant level and 'jobsagoodun'.

Edited by steeley, 13 October 2020 - 06:31 AM.

[lanvid]

Should be torqued down, check Haynes manual for sequence

Originally posted by cooperman, this what I have always done too


Torque up on initial fitting using the correct sequence to 30 lb.ft, then 40 lb.ft. then finally 50 lb.ft. Set valve clearances accurately using 'rule-of-nine'.
Run engine through a few heat cycles, or drive for around 100 to 200 miles, then loosen each nut in turn by 1/2 a turn and re-torque to 50 lb.ft. Just do one nut at a time, but still in the correct sequence.
Finally re-set valve clearances again, check coolant level and 'jobsagoodun'.

steeley thank you, these is the procedure for torquening the head bolts. my question was for the studs only. before putting back the head

[Spider]

The normal procedure is hand tight, however, I like to nip them a small bit so that down the track if the head has to come off and the top threads are a bit worse for wear, the stud stays put when undoing the Nut.

[Cooperman]

That is exactly what I do, using two nuts on the stud. I don't use a specific torque, just 'nip' then up a bit so that they are firm, but not too tight. It seems to work well.