Author Topic: Stud to replace the crank bolt? (Read 8870 times)

jtanguay · « **on:** December 07, 2008, 09:05:46 am »

Just a thought... you could get wayyy more clamping force with less actual torque required that way. i guess the problem is finding a place that sells something that big?

thoughts?

jtanguay · « **Reply #1 on:** December 07, 2008, 06:22:22 pm »

nobody??? virtually eliminate crank failures here!!! :lol: or is that just an absurd idea?

truckinwagen · « **Reply #2 on:** December 07, 2008, 06:58:44 pm »

not an absurd idea at all, if you can find a stud that would fit.

go forth and find one!

jtanguay · « **Reply #3 on:** December 07, 2008, 09:17:43 pm »

what about those guys getting head studs from fastener companies? they must be able to supply something to suit!!!

the main reason for my inquiry is because i'm assembling my motor (1.9 1Z TDI) and the crank bolt isn't that cheap (considering it has to be replaced everytime its taken off, as well as the substantially high torque required to properly tighten it.

just taking a guess here, but with a special moly lube, 70-80 ft/lbs should be good enough (and actually produce MORE clamping force than the stock bolt torqued at nearly double, if not more), and that is sooo easy to achieve (no fancy tools needed-just hook up the tranny and put it in gear)

my initial thoughts on problems with this idea are that removing the pulley(s) with the stud installed would be quite difficult... therefore a solution would be required; by cutting a slot into the end of the stud, or having a hex style nut shape ground in, so that a normal socket could fit on-space permitting of course. this 'extra' step of removing the stud shouldn't be that bad. a good few 'taps' would help loosen it up.

maybe the TDI crank fix wouldn't be necessary on a vehicle using a stud type fastener on the crank pulley???

thanks

jtanguay · « **Reply #4 on:** December 08, 2008, 02:51:15 am »

maybe even a stud to replace the camshaft pulley bolt too? virtually eliminate he possibility of it slipping, without over tightening? :wink:

zukgod1 · « **Reply #5 on:** December 08, 2008, 06:52:06 am »

I like your thinking.

I would be willing to bet ARP has something already you could use. Give them a call with the dims/ thread pitch etc.

AudiVWguy · « **Reply #6 on:** December 08, 2008, 08:29:16 am »

Why don't you call ARP?

jtanguay · « **Reply #7 on:** December 08, 2008, 12:35:15 pm »

i'll contact them, but off chance does anyone have the proper dimensions/thread pitch for the crank bolt & camshaft pulley bolt??? if not i suppose i could go out and measure.

thanks

lord_verminaard · « **Reply #8 on:** December 08, 2008, 01:01:31 pm »

It's an M14x1.5x47 I think. Very hard to find studs in that size. It just so happens that there are wheel studs made to screw in to VW hubs to replace the bolts that are M14x1.5x50, but they are double-ended. Might be worth a try though. I think they were grade 8.8.

Brendan

cyrus #1 · « **Reply #9 on:** December 08, 2008, 05:29:22 pm »

You could probably also use a long set screw. It would then have the socket head.

AudiVWguy · « **Reply #10 on:** December 08, 2008, 09:00:15 pm »

Check this out.

http://www.bildon.com/catalog/DetailsList.cfm?ID=M14.DE.Stud&Nav=10&SubNav=none

Imagine what kind of torque this baby can take! :shock:

jtanguay · « **Reply #11 on:** December 09, 2008, 01:11:37 am »

Quote from: "AudiVWguy"

Check this out.

http://www.bildon.com/catalog/DetailsList.cfm?ID=M14.DE.Stud&Nav=10&SubNav=none

Imagine what kind of torque this baby can take! :shock:

hmmm very interesting!!! i was hoping to find a stud with a low thread pitch to increase the clamping force, but this seems like it would be perfect!

truckinwagen · « **Reply #12 on:** December 09, 2008, 08:51:22 am »

good find!

so have we agreed that both bolts are 14x1.5?
I just want to make sure before I go and buy something.

jtanguay · « **Reply #13 on:** December 09, 2008, 12:45:23 pm »

Quote from: "truckinwagen"

good find!

so have we agreed that both bolts are 14x1.5?
I just want to make sure before I go and buy something.

well if brendan is right... :wink:

considering that race guys torque their wheel nuts down to more than 150 ft/lbs, i think the crank pulley would be going NOWHERE if cranked down to that (especially with some moly lube)

actually i just opened etka and its saying M14X1,5X33 (1.6's at M14X1,5X33) so i think we're in business :twisted: just need someone crazy enough to try this!!! :lol: i think i might...

truckinwagen · « **Reply #14 on:** December 09, 2008, 01:28:26 pm »

I will jump on this later today!

so both the crank and camshaft bolts are 14x1.5?
if so I will buy two and go for both!