Worried about my head bolts

[dub-disaster]

Yup me too, but I used the g40 gasket although I can't vouch for reliablilty as I havnt run it yet !!

[Robin]

You will certainly get less clamp load using non G40 bolts. Tps decided to supply me 9 G40 head bolts instead of the 10 I ordered so out of desperation I used 1 Gsf bolt. With all of the bolts torqued to the correct sequence I did an over checked with 100nm on the torque wrench and all the G40 bolts clicked off but the GSF bolt didn't and kept going.

[dub-disaster]

next time the head comes of, be it from head gasket faliure or for any other reason i will defiantly be swapping to genuine bolts but the gsf ones will stayy in untill somthing goes wrong now

[Andy]

You will certainly get less clamp load using non G40 bolts.

?

[hayesey]

surely if you torque them the same then it's the same clamp load?  But the weaker ones are more likely to break

[Jake G 4 0]

What's the right torque load anyway??

I torqued mine up 60nm then 2x90 degrees or 1x180 degrees??

[Jezza-7]

Yeah thats right 40nm 60nm then 2x90 or 1x180

[Jake G 4 0]

Just had a quick scout on a couple of websites and I believe I got my bolts from bar-tek-tuning so they should be proper g40 spec bolts and they are torqued correctly cheers jezza.

So hopefully they should be fine (fingers crossed).

cheers for all the post's lad's

[PeteG40]

surely if you torque them the same then it's the same clamp load?  But the weaker ones are more likely to break

maybe not the same clamp load if they stretch more???

[hayesey]

hmm maybe actually since the last stages of torqueing are angles rather than lb/ft

[Robin]

Pete is correct.

Instead of clamping more the bolt is actually stretching instead.