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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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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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If the belt is removed or skipped this is an interference engine, valves and or pistons could be damaged by turning crankshaft, seek professional help.
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Do i need to remove camshaft bolt to remove camshaft pulley on 1996 Mazda Protege

1 Locate the crankshaft pulley on your vehicle. This is usually on the driver's side, but may be on the passenger's side if your timing belt is located on the passenger's side. Place the end of the tire wrench over the lug nuts of the appropriate wheel of your vehicle and turn the wrench about 45 degrees. 2 Put your emergency brake on. Then use the floor jack to jack up the vehicle's front jack point (an extension of the frame).3 Put the jack stands under the frame of the vehicle. Then, lower the vehicle onto the jack stands. 4 Continue to loosen and remove the lug nuts, and pull the wheel off.5 Remove the plastic rivets that hold the splash guard in place in the wheel well. To do this, you need to wedge the screwdriver in between the rivets and the splash guard and pry them out.6 Locate the crankshaft pulley. It will be right behind the splash guard you just removed.7 Remove the crankshaft bolt using the crankshaft bolt remover tool. Place the tool over the crank pulley bolt in the center of the pulley. This device prevents the pulley from rotating while you loosen the bolt.8 Place the socket end of the impact wrench over the crankshaft bolt remover tool. Set the impact rench to turn counterclockwise and turn on your air compressor. Wait until the compressor is fully charged. Then, work the bolt loose. It may take a while as this bolt normally requires in excess of 800 ft lbs of torque to remove.9 Attach the arms of the crankshaft pulley removal tool over the pulley and tighten the tool to the pulley using the tool's supplied bolts. Continue to tighten the tool using the bolts until the crankshaft pulley is pulled off the crankshaft.

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Replacing a timing belt on a 1994 Ford Ranger

Instructions Things You'll Need:
  • Drain pan
  • Ratchet
  • Ratchet extension
  • Socket set
  • Small standard screwdriver
  • Phillips screwdriver
  • Timing belt tensioner wrench No. T74P-6254-A
  • Large standard screwdriver
  • Torque wrench
  • Timing belt
  • Timing belt cover gasket
  1. Place a drain pan under the radiator and drain the coolant from the radiator.

  2. Squeeze the spring clamp holding the upper radiator hose to the radiator fitting with a pair of rib joint pliers and slide the clamp towards the engine.

  3. Twist and pull the upper radiator hose off the radiator.

  4. Remove the fan blade using a ratchet, ratchet extension and socket.

  5. Rotate the belt tensioner pulley using a breaker bar and remove the drive belt.

  6. Detach the water pump pulley using a ratchet, ratchet extension and socket.

  7. Pry off the access plug from the upper part of the timing belt cover using a small standard screwdriver.

  8. Set the transmission to Neutral and apply the Parking brakes.

  9. Rotate the crankshaft pulley with a ratchet, ratchet extension and socket to align the "O" mark on the crankshaft pulley and the "O" mark on the belt cover.

  10. Look through the cover access hole. If you see another timing mark on the camshaft sprocket aligned with the mark on the inner belt cover, cylinder number 1 is at Top Dead Center (TDC). If not, rotate the crankshaft one complete turn again and check for the alignment marks.

  11. Removing the Timing Belt
  12. Unscrew the four mounting bolts and the Phillips screw next to the access plug from the timing belt cover using a ratchet, ratchet extension and socket and Phillips screwdriver.

  13. Detach the crankshaft pulley using a ratchet, ratchet extension and socket and remove the belt guide (large washer) from behind the crankshaft pulley. You may need a pulley remover to take the crankshaft pulley off. If so, you can rent one from most auto parts stores.

  14. Loosen the adjusting bolt on the tensioner pulley assembly using a ratchet, ratchet extension and socket.

  15. Rotate the tension spring rollpin (this is the screw next to the adjuster bolt on the tensioner pulley assembly) away from the timing belt using timing belt tensioner wrench number T74P-6254-A. As you hold the timing belt loose, tighten the assembly adjuster bolt to lock the tensioner using the ratchet, ratchet extension and socket. Now remove the tensioner wrench.

  16. Remove the timing belt.

  17. Installing the New Timing Belt
  18. Install the new timing belt starting at the crankshaft sprocket. Route the belt in a counterclockwise direction over the auxiliary and camshaft sprockets. Properly engage the belt lugs on the sprockets' teeth and keep any slack on the belt to the right side, between the crankshaft and camshaft sprockets. Make sure not to rotate any of the sprockets as you install the timing belt.

  19. Loosen the adjuster bolt on the tensioner pulley assembly so the tensioner rolls against the belt. If necessary, push the tensioner pulley against the belt with a large standard screwdriver to remove any remaining slack on the belt.

  20. Make sure the transmission is in the Neutral position and the Parking brakes are engaged.

  21. Rotate the crankshaft two complete revolutions so that cylinder No.1 is back in TDC. This will help to tighten the timing belt on the sprockets.

  22. Tighten the adjuster bolt on the tensioner pulley assembly between 14- and 21-foot lbs. (19.0 to 29.0 Nm) using a torque wrench.

  23. Tighten the tension-spring bolt between 28- and 40-foot lbs. (38.0-54.0 Nm) using the torque wrench.

  24. Install the belt guide (large washer) and the crankshaft pulley. Tighten the pulley bolt with the ratchet, ratchet extension and socket.

  25. Install the timing belt cover with a new gasket using the ratchet, ratchet extension and socket and Phillips screwdriver.

  26. Reinstall the water pump pulley, drive belt, fan blade and upper radiator hose.

  27. Refill the cooling system with coolant.

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1 Answer

Crank shaft bolt for timing gear wont come off so i can replace timing belt.

Use air impact wrench with about 150 psi or more, or place power handle brace against chassis or lower suspension and turn over engine with starter but do not start engine, this will break torque on bolt then you can remove with ratchet handle

Aug 20, 2010 | 1992 Mazda Protege

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