5 GT Turbo Renault 5 gt turbo head bolt torque

[Adey]

Ok people what have you torqued your head bolts too, stock head bolts and up-rated? just interested to see what people have done on their gtts/c1j's

 

[Number 11]

65 ft pounds,
Had a 12.9 hexagonal caped bolt snap at 90 ft pounds, ....
Most important is the retourqueing sequence, heat cycle , next day retourqe in order, then a week of driving , again when cold....

 

[James5]

80nm on c1j with 12.9 and thicker H/G, i didn't re-torque either (Learn't this from scoff many years back) also set the tappets 20/20 on a 285 cam sounded fine and no probs upto 7800 rpms.

I have done 90nm before on decent unbrako branded headbolt's

 

[Number 11]

I must ad, I only run 15 pounds of boost , the joy of going to the end of the Richter scale isn't for me now....
I'm old.... 65 ft pounds is 88 NM ish..

 

[Brigsy]

1. No need to flog them down. 12.9s slightly over stock (mine are 55ft/lbs) is more than adequate. I ran the van at stock settings for many years no issues, only went slightly tighter after a minor oil leak out of the gallery. The crucial bit is retorque after a heat cycle. If you go too tight you risk cracking the oil gallery in the head.

 

[Red21]

Also if you go to far with the clamping pressure the gasket could squeeze out around the liners or put to much stress on the actual liners that they become prone to failure which I have seen before.

 

[Mart]

80nm, correct sequence with the 12.9 tensile bolts. No need to cold retorque, etc.

 

[Number 11]

Sorted, 5 different answers, I bet they all work......... :ag:

 

[Adey]

Indeed. Tight enough to hold it down but not so tight they snap lol

 

[solinakias5gtt]

in an old c1j i had 12nm with no problems.now in this engine i have 90nm.i always re check after 1.000km with cold engine if all bolts are still tha same kilos

i would also like to ask if someone has ever tried with std camshaft anything else in valve clerance except 20/25 ?

 

[Bob]

65Nm is more than enough.....anything more and you just damage the cylinder head.