Autoricambi

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.

ConeCrasher

iTrader: (1)

Flyin Miata crank tool is the answer. I built my own. It was the only way I could get one loosened up a few years ago. I think I ended up with about 6’ cheater bar on a 3/4 breaker bar. I understand your frustration.

WigglingWaffles

My secret sauce for super stuck anything is freezing, sometimes i heat and let it cool first too.
A can of computer duster upside down works great but avoid the fumes because they're loaded with bitterants.

Arca_ex

iTrader: (2)

Either borrow or buy a Milwaukee M18 Fuel 1/2" hi-power impact and get a weighted crank bolt impact socket for it. I've never seen that combo fail.

DNMakinson

iTrader: (3)

Wow, never heard of the counterweighted impact socket before. Is the Ingersol Rand one any better than the Lisle style?


@technicalninja

Arca_ex

iTrader: (2)

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.

rleete

iTrader: (21)

Wow, me neither. That's pretty impressive.

patsmx5

iTrader: (16)

Couple ideas.

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.