packjh Posted May 13, 2007 Report Share Posted May 13, 2007 Unfortunately im slow and didn't finish my cam today, the auto hobby shop on base is only open 12 hrs on Saturday. I took my time to do everything right. Which i did find a pretty damn easy way to get the pulley off without the use of the bolt. The problem is that we thought we striped out the crankshaft but we didn't the bolt threads in about 7 turns and we can press the pulley in but its way more difficult than either one of us and are experience think so. The question is that once it gets hard we do a few turns and start to press in then we pulled it out and it looks like the first couple threads on the bolt are getting slightly chewed and and we get metal shavings out from the threads. We are going to try and clean the threads up tomorrow with a 16 mm tap and die set just to see if we can get the threads to straighten up. Its not eating the whole bolt which is confusing the hell out a of us. Its just the first 2 or 3 then its fine. Looking for other ideas? Quote Link to comment Share on other sites More sharing options...
JAMEST Posted May 13, 2007 Report Share Posted May 13, 2007 Unfortunately im slow and didn't finish my cam today, the auto hobby shop on base is only open 12 hrs on Saturday. I took my time to do everything right. Which i did find a pretty damn easy way to get the pulley off without the use of the bolt. The problem is that we thought we striped out the crankshaft but we didn't the bolt threads in about 7 turns and we can press the pulley in but its way more difficult than either one of us and are experience think so. The question is that once it gets hard we do a few turns and start to press in then we pulled it out and it looks like the first couple threads on the bolt are getting slightly chewed and and we get metal shavings out from the threads. We are going to try and clean the threads up tomorrow with a 16 mm tap and die set just to see if we can get the threads to straighten up. Its not eating the whole bolt which is confusing the hell out a of us. Its just the first 2 or 3 then its fine. Looking for other ideas? YOU NEED TO BUY A NEW CRANK BOLT ANY TIME YO PULL IT OUT. THERE CHEAP. THEY ARE MADE TO BE TORQUED ONCE. JAMEST Quote Link to comment Share on other sites More sharing options...
packjh Posted May 13, 2007 Author Report Share Posted May 13, 2007 (edited) i did buy a new one i just dont wanna chew the first couple threads up on it when we start to torque it Edited May 13, 2007 by packjh (see edit history) Quote Link to comment Share on other sites More sharing options...
packjh Posted May 14, 2007 Author Report Share Posted May 14, 2007 We just re tapped the crankshaft worked great so everything works great. Quote Link to comment Share on other sites More sharing options...
pnblwzd Posted May 14, 2007 Report Share Posted May 14, 2007 You need a longer bolt to press the balancer back on, then when it bottoms out you remove it and install a stock bolt. If you don't use a longer bolt, you risk stripping the first few threads on the crank. Quote Link to comment Share on other sites More sharing options...
CNE Posted May 15, 2007 Report Share Posted May 15, 2007 (edited) There is a tool made to press the pulley back on. It can be made easily. You take a bolt the same size but longer, screw on an extra nut, slip on a beefy washer that will cover the hole in the center of the balancer, screw the bolt into the crank with the balancer started on the crank, then start turning the nut while holding the bolt head using the nut to press the balancer on. This way, you don't have to worry about the longer bolt bottoming out in the crank or damaging the threads because you use the nut to press it on so there is no turning pressure on the crank tthreads. GM supplies a tool to those of us at the dealer but this is easily made. You also use the old bolt to torque it first, then retorque with the new bolt. Edited May 15, 2007 by CNE (see edit history) Quote Link to comment Share on other sites More sharing options...
Krambo Posted May 15, 2007 Report Share Posted May 15, 2007 ...Just adding my input: I put my crank pulley in the oven at 225*F for like 20 minutes. Pulled it out, smeared some 5W30 oil on the inside and slid her on. Didn't have to use the longer bolt to seat it. I have re-used the old bolt before by using some red loctite and TQ it to 250#'s and it held just fine. However the bolt is a torque to yield and is supposed to be a one time use item. For $4, I tend to agree. Quote Link to comment Share on other sites More sharing options...
packjh Posted May 15, 2007 Author Report Share Posted May 15, 2007 Yea, diffently a one time torque. If i have to pull the pulley again i will buying an arp bolt. I didnt have an oven where i was doing the work at tho. I did see that tip in an earlier thread you had posted in. I torque everything to the required amount and dont have all the tools at my house so i do it at the auto hobby shop on base. If i had an oven i woulda done it tho. Everything is good now. Quote Link to comment Share on other sites More sharing options...
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