Head bolts?

I have a new set still in boxes I could measure but at work tomorrow untill late

They are stretch bolts arent they .... i cant seem to find what length oe studs are new ....

That would be cool if you could measure a new set, then i would have a reference to work too. cheers dudes...

just noticed ive made 100 posts in 2 years........... im fookin useless lol ;-)

Not everyone is cut out to be a postwhore  

The online workshop manual has the correct lengths in which is acceptable as they are stretch bolts.

As Bucky says. I'm sure the manual states you only measure the threaded section of the bolt to determine if they are reusable.

As a general rule tho if they have only been torqued down once they will be ok to use again

The manual shows you measure the full length of the bolt not just the threaded section (not the bolt head though) on page 207, but it only gives sr20de lengths not sr20det lengths.I dont mind buying new ones but would like to reuse the originals if i can.

So it does in that case no idea, I just bought new ones to be on the safe side

nomad wrote:Not everyone is cut out to be a postwhore  

Number 1 post whore ^^

Hello all,
I'm bring this thread up again to ask if anyone has ever reused their DET head bolts?
I've got 20 of them and have just been to the gage labs where i used slip rings.
If i set the slip rings to 180.43mm, 10 of the bolts are under this length and 10 of the bolts are over this length,
So, could i re-use the 10 bolts that are less then 180.43mm in length?
Its a shame to bin them all and it'll save a few quid with my rebuild costs

I would reuse them, i've used one set at least 3 times. they don't show specs so would assume they not tty bolts. for a big power build I would be fussy but for most stuff reusing bolts has no problems .

Mr B wrote:I would reuse them, i've used one set at least 3 times. they don't show specs so would assume they not tty bolts. for a big power build I would be fussy but for most stuff reusing bolts has no problems .

Well bugger me
Never thought id see the day that Mr B says re-use old parts,
I was on the verge of ordering new ones aswell, now im not sure.

If my experience of std bolts is correct the lengths are usually specced to the nearest 5mm, so these bolts wouldve originally been 180mm long so they've stretched ~0.43mm, about 0.24% which naff all i suppose,
Is it common knowledge that these are re-used?

We re used mine when we rebuilt my engine in 2009. Its still going strong

Stu wrote:We re used mine when we rebuilt my engine in 2009. Its still going strong

Well thats decided then, ill re-use them
Same goes for the flywheel and main cap bolts,
Cheers

Standard head bolts get reused a lot without issue, it one of the extra durable bits of the 54C along with the standard conrods, worth putting in set of arp conrod bolts though .