Stuck harmonic balancer/crank pulley bolt
03-19-2019, 01:29 PM
#1
Stuck harmonic balancer/crank pulley bolt
I'm removing the timing cover and I got everything off expect for the crank pulley. The bolt will not move even with a 3/4" drive impact (although I did have a reducer from 3/4 to 1/2 and a universal to get to the area). I tried to heat it up with propane and then later soaked it in PB blaster but the bolt will not loosen.
Last edited by Erick_; 03-19-2019 at 01:29 PM. Reason: Correction
03-19-2019, 03:57 PM
#2
Senior Member
Originally Posted by Erick_
I'm removing the timing cover and I got everything off expect for the crank pulley. The bolt will not move even with a 3/4" drive impact (although I did have a reducer from 3/4 to 1/2 and a universal to get to the area). I tried to heat it up with propane and then later soaked it in PB blaster but the bolt will not loosen.
03-19-2019, 05:23 PM
#3
Junior Member
I"m not sure how tightly that bolt is torqued on to. One of my cars needs that bolt to be torqued to 250 lb ft. which requires a huge amount of leverage to break loose. I have a 4 ft piece of pipe in my garage that is used solely as a cheater for my breaker bar to get that bolt out. You might try that. I also have the emergency brake set and someone in the car pressing on the brake (probably overkill).
03-19-2019, 09:46 PM
#5
Starter.
Although although a 3/4 inch impact wrench should be doing a thousand plus foot pounds. My stepson has a 1500 lb impact wrench. If it's a cheap one , or insufficient air supply, it might no have anywhere near its claimed torque.
I've never had the starter trick not work. Use a 6 point socket.
Although although a 3/4 inch impact wrench should be doing a thousand plus foot pounds. My stepson has a 1500 lb impact wrench. If it's a cheap one , or insufficient air supply, it might no have anywhere near its claimed torque.
I've never had the starter trick not work. Use a 6 point socket.
03-21-2019, 11:15 PM
#7
Senior Member
I always reuse them. Just put a dab of Loctite on it, and send it.
Trending Topics
03-22-2019, 09:09 PM
#10
I would say it would all depend on the reason why it was so difficult to remove as to whether or not replace the bolt. If it was stuck due to some corrosion and the threads look good, then reuse it, if it was stuck because it was way over torqued, then replace it. If it was way over torqued, then the bolt was stressed and stretched, particularly the threads which is the weakest part of the bolt and could fail by either snapping or stripping, and that usually happens at the least convenient time such as a hundred miles away going 70 down the highway. It's not that expensive. A few bucks to have peace of mind.