crank pulley came off, threadlocker?
crank pulley came off, threadlocker? Join Date: Feb 2004
Location: Nor Cal, bay area
Posts: 724
threadlocker or not? Crank pulley came off.....
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Well I certainly felt smug after doing my own cam swap with a friend, and then after dynoing and driving around for a few days the crank pulley decided to come off.
Yeah this happened around 160 mph with a run in with a GSXR 600. Luckily the steering rack held it on for dear life, and I was able to limp it home without the main belt coming off or breaking. Lost a lot of oil out of the seal.
After some research, we have come to the conclusion that certain types of threadlocker MAY become a lubricant when heated, AWESOME.
Those who have had this happen, was threadlocker used? And what kind? Cause from what I gather red loctite works, and not whatever we used even though it was high temp.
Ive never pinned a crank before, but if its not to difficult Id certainly like to do it this time around.
So whats the verdict on threadlocker, and how do I pin this *****?
Location: Nor Cal, bay area
Posts: 724
threadlocker or not? Crank pulley came off.....
--------------------------------------------------------------------------------
Well I certainly felt smug after doing my own cam swap with a friend, and then after dynoing and driving around for a few days the crank pulley decided to come off.
Yeah this happened around 160 mph with a run in with a GSXR 600. Luckily the steering rack held it on for dear life, and I was able to limp it home without the main belt coming off or breaking. Lost a lot of oil out of the seal.
After some research, we have come to the conclusion that certain types of threadlocker MAY become a lubricant when heated, AWESOME.
Those who have had this happen, was threadlocker used? And what kind? Cause from what I gather red loctite works, and not whatever we used even though it was high temp.
Ive never pinned a crank before, but if its not to difficult Id certainly like to do it this time around.
So whats the verdict on threadlocker, and how do I pin this *****?
I used the recommended threadlock when I put in the new bolt after I did the ASP pulley install. Don't remember which threadlock it was but I have not had any problems. I haven't taken my car to 160 either. Those crank bolts are high torque + degrees. Did you do that during install?
It's supposed to be torqued to 240 ft/lbs reusing your old crank bolt. Then, remove the bolt and install the new crank bolt, torquing to 37 ft/lb. Once that's done, get a breaker bar out and try and turn it 140 degrees past where it is now. I got about 100 degrees turned on mine and have never had a problem, no loctite either, not sure where you heard you needed that for the stock GM TTY bolt.
Originally Posted by ArcticZ28
It's supposed to be torqued to 240 ft/lbs reusing your old crank bolt. Then, remove the bolt and install the new crank bolt, torquing to 37 ft/lb. Once that's done, get a breaker bar out and try and turn it 140 degrees past where it is now. I got about 100 degrees turned on mine and have never had a problem, no loctite either, not sure where you heard you needed that for the stock GM TTY bolt.
Are you sure you didn't toast your balancer? Mine eased off about 1/4" durning a dyno pull (dumped oil and frayed the belt) and the general consenses both on the forum, and from a vendor I asked, was to change out the balancer. I borrowed a pinning tool and will be pinning it this time!
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Originally Posted by BOTTLE ROCKET
Are you sure you didn't toast your balancer? Mine eased off about 1/4" durning a dyno pull (dumped oil and frayed the belt) and the general consenses both on the forum, and from a vendor I asked, was to change out the balancer. I borrowed a pinning tool and will be pinning it this time!
Where did you get the pinning tool from? I want to pin my crank pulley too, but dont know how.
Originally Posted by Dan_the_C5_Man
Pinning the crank is very easy and it is "the" solution to the "walking dampner" issue. I pinned mine simply so I wouldn't have to go through the crazy-highTQ non-sense, worked out great. 
Originally Posted by 777
Most likely new bolt was not used.
Now we WILL be torquing to 37 ft lbs+120 degrees, with red loctite #262.
This whole ordeal gave me the excuse to do this the right way, with an ASP underdrive pulley anyways. Thanks all for the replies.
I really don't like the idea of loctite on the threads, its not called for in the manual. With a new pulley and bolt, proper tightening procedure, I think you put yourself at risk of later problems if you have to disassemble again. Just my opinion though.
