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Can't remove crankshaft bolt for timing belt change

1992 Mazda Protege 1.8L. Trying to remove the crankshaft bolt so I can change the timing belt. Tried breaker bar/extension pipe/5thgear/brakes combo - forced clutch to slip with my 200 lbs bouncing at 3 and 1/2 feet leverage point. Tried impact wrench at 95 psi, repeatedly, - nothing. Tried breaker bar braced against ground while trying the starter (including while using jumper from another car to be sure there was plenty of power) - nothing. Looking for a special tool to hold the crankshaft by the pulley bolts, but I can only find for mazda up to 1991 - mine's a 1992. Are there more effective tricks I haven't tried? Or does someone know where I can get a STRONG crankshaft bolt removal tool?

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  • Neanderthal
    Neanderthal Mar 20, 2014

    No, I asked about reverse threading. Mazda shop says no, it has standard threading. They also said they never had one they couldn't loosen with either an impact wrench or the breaker-bar/starter method. I found a reference on the web last night to a possible Mazda crankshaft tool part number. I'll try to stop by the Mazda parts desk today and see if they have it in their system.

  • Neanderthal
    Neanderthal Apr 16, 2014

    A tool supposedly exists for holding the crankshaft by the pully bolts while you use a breaker bar on the crakshsft bolt. Mazda could not find it in their parts system, probably because it was too long ago. I finally went back to the starter method with the braced breaker bar on the crakshaft bolt. I had to charge the battery to make sure I had maximum power to the starter. I bumped it a few times, checked the socket to make sure it wasn't slipping off, bump a few more times, took the socket and breaker bar off and turned the engine to a new position and repeated all that in 3 or 4 crankshaft positions, so I wouldn't be hitting the same spot on the flywheel every time. After about 40 bumps with the starter, the bolt finally came loose.

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  • 17 Answers

Is it reverse thread?

Posted on Mar 20, 2014

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Posted on Jan 02, 2017

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SOURCE: can't remove crankshaft timing belt pulley BOLT!

You will have to brace the crankshaft somehow, either by way of the flywheel, or the pulley. The trick to getting the bolt to break is "heat". Propane will sometimes work, but it's generally not hot enough. You want to get that bolt glowing if you can, and hit it with air impact then. Be careful not to burn yourself!

I hope this helps you, and I wish you luck on your repair.

Posted on May 12, 2009

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