aren't you running a vortech supercharger too? You wouldn't run a UR underdrive pulley with one - unless they make a stock diameter pulley - do they?

 

No that was my G. Z was TT'ed now is stock.

 

Keep in mind that the tightening procedure from the KJR install instructions that I included above are from the Factory Service Manual. It's not something made up by KJR.

 

UR does have a lightweight non-underdrive pulley.

 

Any time there is a situation where a bolt backing out will cause catastophic failure, use Lok-Tite. If the installer didnt use it, he was an idiot, and idiots dont back up their work so forget it as far as going back. Burn his house down after u fix it.

 

I shipped out the crank pully this morning. Goodluck on the fix OP.

 

Don't wanna get too much more OT but we have bucket tappets that don't require adjustment. No lifters in a VQ.

 

I know the 2jz toyota motors torque the crank pulley bolt to 239 ft/lbs. So i'm sure 150 is fine, I just saw 80ft/lbs in the instructions and didn't think it was right.

 

OK, Section EM page 64 of the service manual. In the pic on the page it shows #9. It then gives a breakdown of the #'s. #9 say Valve lifter. These caps come in different sizes that allow for adjustment.

 

Ok yep its a UR.

 

I'm familiar with the FSM and very familiar with the makeup of the VQ's valvetrain. I've taken a few apart. VQ's don't have lifters in the traditional sense like pushrod or OHC engines that use rocker arms to actuate the valves. We have direct-acting bucket tappets. Sure, you can select different buckets to set the valve clearance but they do not need periodical adjustment like some types of lifters do. The valve clearance is set for the life of the engine, unless you introduce aftermarket camshafts that change the valve clearances.

 

that sucks for the UR. I wonder if any crank pulley would have had the same issue though if it wasn't tightened right - not that I know if that was the case here or not

if my KJR ever messes up, I'll probably get a non-underdrive UR pulley

 

I think the general logic is the KJR and other all aluminum pulleys are more prone to this since the key way is softer, but the URs steel sleeve will still become damaged if loose.

 

Are you typing to impress yourself or something? Bro I think we ALL know what I was talking about. I called it what the FSM calls it. In the end I dont care whats its called or what it does nor do I care how it works. All I know is the crank pulley is fugged up. One of the main reasons for posting this in the first place was to warn others that have after market pulley's installed to check them after a few thousand miles.

 

I apologize for going OT. To add my $.02, i don't think you would have had any issues had the pulley bolt been tightened to spec per the FSM. The procedure involves angle tightening which most installers don't bother doing. Hope it works out for you.

 

Thanks.
Its just frustrating because I do all my own stuff. I installed cams in this car and wasnt happy with the tapping from the clearance of the caps. They were in spec but just a little loud for me. So I took it to a well known Z shop and pay to have everything pulled a part and new new caps put back in. This is what I get!

 

i got UR underdrive pulley. No issues running for at least two years. It was torqued by an impact wrench. The new belts were re-tightened in two weeks to get rid of the squeal.

 

Congrates on doing it urself, your going to screw up time to time but dont give up. A screw up is a learning experience in disguise. Hang in there

 

Did you ever get it fixed yet?

 

We have seen this happen on a stock pulley, on a car that was done by a shop in Michigan.The guy purchased the car used, from a guy in Michigan who had the car done there at a half assed shop (Not GRD, and Not Charles's shop) and they never titened the crank pulley bolt, it was hand loose. He also drove it from Michigan like that. To properly install a crank pulley bolt is a PAIN and required 2 people to do it right. The good thins, aside from beating up the softer pulley, the crank should be ok and is internally balanced..So damage was most likely contained to a minimal.