Stuck crank bolt
#1
Stuck crank bolt
Greetings yall! Long story short my timing belt snapped and I have to replace it. I cant get my crank bolt off to save my life. So far ive tried taping my starter, PB blaster/ Liquid wrench for 2 days. 4 different impacts and every type of breaker bar combo with heat you can think of. How can I get it off?
Yours truly, A man who might have to sell the miata.
Yours truly, A man who might have to sell the miata.
#5
Retired Mech Design Engr
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Wow, never heard of the counterweighted impact socket before. Is the Ingersol Rand one any better than the Lisle style?
@technicalninja
@technicalninja
Last edited by DNMakinson; 07-03-2021 at 09:14 AM. Reason: Added video
#6
Wow, never heard of the counterweighted impact socket before. Is the Ingersol Rand one any better than the Lisle style?
https://youtu.be/E_Ib30lfDOU
@technicalninja
https://youtu.be/E_Ib30lfDOU
@technicalninja
The IR one is three times the price of the Lisle, and I don't think it works three times better so I went with the cheaper one. Honda crank bolts are notorious for being hard to get out and with my Milwaukee 1/2" impact it zipped it off my K24 immediately, didn't even struggle. About the same amount of effort as a normal lug nut, I was pretty impressed.
#8
Greetings yall! Long story short my timing belt snapped and I have to replace it. I cant get my crank bolt off to save my life. So far ive tried taping my starter, PB blaster/ Liquid wrench for 2 days. 4 different impacts and every type of breaker bar combo with heat you can think of. How can I get it off?
Yours truly, A man who might have to sell the miata.
Yours truly, A man who might have to sell the miata.
1. Use jumper cables and a running vehicle to prop up the battery voltage while using the starter motor. If the starter ends up with 13V instead of 10V, that's a 69% increase in torque for the extra 3V.
2. When you setup your breaker bar/pipe on the bolt before using the starter motor, try and set it up so that instead of it resting on teh ground, have it propped up a few inches (holding it up with a small string for example). This will give the starter motor time to get the motor spinning, and dumping energy into the rotating mass of the crank/flywheel/clutch before the breaker bar hits the ground. The IMPACT of this will far exceed any hand held impact wrench you can buy.
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