How to Remove a Stuck Crank Pulley Bolt Without an Impact

By Scott Lear
Jul 20, 2018 | Posted in Shop Work , Drivetrain | From the June 2015 issue | Never miss an article

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1. Loop the old accessory belt around the crank pulley.

2. Run both sides of the belt over an available accessory pulley.

3. Anchor the other end of the loop on a third pulley.

4. Rotate the crank pulley and take up the belt slack by letting the crank pulley end pinch the belt under itself.

When the last of the slack is gone, the belt should immobilize the crank pulley completely, allowing you to apply gobs of bolt-loosening torque.

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View comments on the GRM forums
AWSX1686 GRM+ Memberand Dork
7/20/18 8:59 a.m.

Neat trick!

impulsive Reader
7/20/18 11:50 a.m.

-set socket/breaker bar in place oriented in a manner that has the breaker bar braced against the floor or chassis.

-bump starter.

-remove socket/breaker bar and unthread crank bolt by hand.

doesn't get any quicker & easier than that.


Jerry From LA
Jerry From LA SuperDork
7/20/18 12:37 p.m.

Don't know if I'd bump start this rig.  I'd be worried about snapping off the water pump snout.  Then again, I'd probably have a pipe on the breaker bar.....

BikingEngineer New Reader
7/24/18 8:10 a.m.

This, plus a torque multiplier (used for Semi-Truck lug nuts) is the easy button. That'll give you a 1.5:1 increase in torque applied (give or take), and remove the need for the big piece of pipe slipped over the breaker bar (the shorter pipe will do).

Torqued New Reader
7/24/18 1:01 p.m.

Or a home made strap wrench made from an old fan belt and axle shaft:

7/24/18 5:43 p.m.
Torqued said:

Or a home made strap wrench made from an old fan belt and axle shaft:

Very simple and effective idea...I like that very much!

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