blues/non stretch torque

Post Thu Mar 08, 2007 7:04 pm

as title ,gonna build up my spare engine and fit some metric-blues,with o.e gasket (f.i).stock bolts(hex)are 60-65 newts,what are you guys doing eem up to....80 rings a bell?

is a re-torque required,hex bolts need but torx dont?i am pressuming hex is non stretch bolt and later torx are stretch bolts?

Post Thu Mar 08, 2007 8:11 pm

i done mine to 70 ftb torque for my head bolts which are the same grade as metric blues

Post Thu Mar 08, 2007 9:05 pm

midnight wrote:i done mine to 70 ftb torque for my head bolts which are the same grade as metric blues

Did you retorque bolts after running?

Post Fri Mar 09, 2007 9:00 am

80ftlb's wound in on my 12.9's, gave them a good run up to temp and retested, they didn't need any nippng up afterwards.

Something I'll double check before I wind the boost up again tho

Post Fri Mar 09, 2007 9:41 am

fozzymonster wrote:80ftlb's wound in on my 12.9's, gave them a good run up to temp and retested, they didn't need any nippng up afterwards.

Something I'll double check before I wind the boost up again tho

not a case of a nip up Mark,loosen each bolt individual and retighten upto xx amount?

Post Fri Mar 09, 2007 9:47 am

75 or 80 Graham... mines 75, that was after i done them to 80 on my 2.7 block and tore the block threads apart..

... havent checked them since...

Post Fri Mar 09, 2007 9:57 am

right seems 80 is the magic figure...got some of that vht copper cement the u.s lads use...so should hold a bit.
think ill retorque mine thinkin about it....best practice...thx all

get busy with my car/engine build

Post Fri Mar 09, 2007 10:04 am

gcorky wrote:
fozzymonster wrote:80ftlb's wound in on my 12.9's, gave them a good run up to temp and retested, they didn't need any nippng up afterwards.

Something I'll double check before I wind the boost up again tho
not a case of a nip up Mark,loosen each bolt individual and retighten upto xx amount?

Graham,

I just checked them to see if they'd slackened off at all, nothing obvious was showing, having had it running for a few hours now I may recheck them when I find some free time.

I've not come across any info that said to undo then retighten them after a warm up tho.

Have I missed something?

Post Fri Mar 09, 2007 10:10 am

"have i missed something"

no m8 just using non stretch bolts it is normal to retorque bolts after a certain period....seems you guys aint ...not a problem ,but i will retorque mine.

Post Fri Mar 09, 2007 1:12 pm

gcorky wrote:"have i missed something"

no m8 just using non stretch bolts it is normal to retorque bolts after a certain period....seems you guys aint ...not a problem ,but i will retorque mine.

Guess what I'll be doing at the weekend now then