Where can I get Head Studs in BC.?

[shox75]

I'm planning to convert to a metal 1.9 gasket, I'd like to install headstuds at the same time.
Another thing, how do you know how much to torque headstuds? Is there a general rule?

[vwmike]

I'm planning to convert to a metal 1.9 gasket, I'd like to install headstuds at the same time.
Another thing, how do you know how much to torque headstuds? Is there a general rule?

I'm not sure who sells them up there, but raceware is the only company I know of that makes the 12mm diesel specific studs. There is a whole sheet about installation and torqueing the studs, but to sum it up they are supposed to be torqued in 3 stages - 35, 50,  and 60 ft/lbs.

[shox75]

only 60 ft/lbs ?

[shox75]

also are 1.8L 8 valve studs usable in a 1.6L diesel, because arp doesn't list any for diesel.

[Audi80]

1.6 diesel has 12mm bolts and gasser engines has 11mm bolts. So you can not use those studs.

[vwmike]

only 60 ft/lbs ?

I think ARP says 65 ft/lbs for the gas studs so 60 is probably about right.

[fspGTD]

I believe the raceware torque specs are 50 ft-lbs max.  But yeah, you should look at and follow closely whatever instructions are provided with your studs.

[vwmike]

I believe the raceware torque specs are 50 ft-lbs max.  But yeah, you should look at and follow closely whatever instructions are provided with your studs.

I have the sheet as there is a set of head studs sitting behind me. 60 is the final torque spec  :wink:

[fspGTD]

Is your stud set the RT-106 (for the 4-cylinder VW Diesel w/ 12mm stud size?)  Because I have bought those years ago and specifically recall the max torque spec being 50 ft-lbs.  In fact I called Randy Hubbard (the owner of Raceware) a few months ago to ask if the torque could be safely increased.  He said that the very first sets of these studs that he sold used to come with instructions specifying 55 ft-lbs final torque, but that due to the large number of people that overtorqued them apparently due to inaccurate torque wrenches, that the spec was changed to 50 ft-lbs.

The 50 ft-lbs spec for the RT-106 is confirmed in this thread: http://www.vwdiesel.net/phpBB/viewtopic.php?t=344

[vwmike]

If it is/was 50 ft/lbs then something has changed.

[935racer]

I still can't seem to blow the stock 1.9 headgaskets with normal stretch bolts installed. 35 psi and tons of fuel all day long for months and it doesn't leak a pinch. I am building a compound setup for a guy right now we are gonna try 45 psi and appropriate fueling to see how much stock bolts and a 1.9 headgasket will hold, should be valuable info for all of us. So far in my experience, if your head is straight the 1.9 gasket with stock stretch bolts seems to be pretty indesctructable. I forgot to mention that I use edelbrock gasket sealer on all the headgaskets I do and I never re torque the head when warm.

[fspGTD]

If it is/was 50 ft/lbs then something has changed.

I'll be darned, it sure does say 60 ft-lbs.  Thanks for the info vwmike!  I also wonder if their product actually changed, or if it was just a change in their instructions.

[shox75]

thanks for all the info guys, that link to the head studs descussion also really helped.
I think i'm just going to stick to stock headbolts for now with a 1.9 headgasket, only planning on running upro 20psi boost.

BTW, can the extra volume you gain in each cylinder with the 1.9 gasket effect much? Loose compression?

Also like DVST8TR mensioned about using a gasket sealant, is that stuff like an adhesive spray, only light coat?

And isn't there any spec. to measure how much headbolts stretched to see if still within spec. ? I remember doing a heagasket on a Neon and reading a sepc. for measuring headbolts for re-useability!?

[935racer]

I haven't had any compression loss issues using 1.9 gaskets, there must be some but I have never noticed it and I have done about 5 1.9 headgaskets on 1.6's in the last 3 months. I did dvst8rs headgasket I use edelbrock gasket sealer and I coat both sides, the small can is much like PVC glue and has a cotton ball to apply it. The gasket sealer works so well that I don't even re torque the bolts after the engine is warm, these engines see 35psi everyday and are abused, no headgasket issues. These heads are totally straight though. I have never seen a stretch spec for vw bolts and I always just replace them with new ones. They are cheap, like under $20. Do it once do it right.

[Dr. Diesel]

my raceware insturction sheet says 20, 40 then 50 ft. lbs. There must have been a change somewhere along the line.