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Crankshaft key busted out broke crank key slot on one side.

The crankshaft key that goes between the pulley and the crankshaft busted out ,and bent one side of the crankshaft slot and broke the bolt off is there any way to fix crankshaft slot with out having to have to get a new one?? Also the crankshaft makes a banning noise when i start the engine. please help..

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Sadly there is no fix but a total new crankshaft .

Posted on Jan 06, 2018


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Posted on Jan 02, 2017

  • 393 Answers

SOURCE: Crankshaft pulley (vibration damper) moved forward.

the pulley is also a dampener often times they seperate from each other. replace pulley/dampener.

Posted on Nov 18, 2008

  • 1 Answer

SOURCE: crank shaft inner pulley lose on 2003 Exterra 3.3

I don't have one. I have the same problem can someone help?

Posted on Nov 22, 2008

  • 1 Answer

SOURCE: geo metro 1998 crankshaft pulley.

Man my bes advcice is to take the engine dow, cuting a hole on the fender dosent soun very practical. Lowering the engine dow is no big deal anyways.

Posted on Dec 09, 2008

  • 89 Answers

SOURCE: Crankshaft pulley bolt broke. How do i get it out????

You will have to drill the bolt out completely. You could first try an extractor set, it will have to be drilled to the size on the extractor set, use a product called PB Blaster and let it soak for a few days reapplying every 12 hours or so. If it broke off you may not be able to get it out with an extractor set but use the biggest extractor that will fit. If you have the head of the bolt and any threads showing you will have to fid a HSS Drill bit a little smaller than the outer diameter of the threads. then carefully drill the bolt out, it will take forever so take your time, I have set up drills with blocks and bungee cords so it will drill itself without you being in atendance, but the drill has to be positioned precisely as to not damage the inside diameter of the threads for when you install the new bolt. I even went so far at times at home to install a video camera to a small tv inside the house so I could monitor if the drill had changed position. I recently had to do exhaust bolts (6) and a spark plug that had rusted and broken off inside the motor, just the threaded portion of the spark plug was all that was there.

Posted on Feb 12, 2009

SOURCE: which way do you turn the crankshaft pulley bolt to loosen it?

It turns left (counterclockwise) to remove. An impact wrench is best if you can get one on it.

If you don't use an impact wrench, you may need to somehow keep the crank from turning when you loosen the bolt.

One way is to pull the belt tighter to put more tension on the crank pulley.

There are other creative ways I've used. If you have any trouble let me know.

Posted on May 31, 2009

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Some engine lay outs there isn't enough room: then you really have to get creative, either lowering engine enough to get to pulley, or raising engine out. But most engines are positioned where the crank pulley can come off easily, with enough room to get the puller on.
The pulley may have a woodruff key in a slot on the crankshaft, and a corresponding notch on the pulley, for proper positioning of the pulley to crank. Don't lose the woodruff key.

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Oct 06, 2009 | 2000 Daewoo Lanos

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Gear on timing belt(Guide gear) seized

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Sep 18, 2009 | 1988 Honda Civic 2 Door

1 Answer

The belt broke so I need to know where the timing marks should be in order to replace a broken cam gear and belt on 98 hyundai accent sohc

First you need to find out if this is a "safe" engine, a few are but most bend some valve when the belt goes (you could try turning gently by hand using the alternator belt) proceed as follows:-remove the drive belts, water pump pulleys, crank pulley, and the upper and lower timing covers.  You'll also need to remove the motor mount if 
You'll need to move the tensioner for installation of the new belt.  Loosen both the pivot and clamp bolts on the tensioner.  Pry the tensioner up and toward the back of the car, and when at the rearmost position, tighten the clamping bolt.

You'll also need to line up the camshaft and crankshaft to TDC.  There's a small hole in the camshaft sprocket that lines up with a notch in the front camshaft bearing cap.  The hole should be pretty much straight up when aligned.  There's a notch in the crankshaft sprocket that lines up with a *** on the front case of the engine.  If I recall correctly, this puts the Woodruff key at about 3:00 when aligned.  

Then install the timing belt with all the slack on the tensioner side.  Loosen the tensioner clamping bolt to release the tensioner, let it self-tension with the spring force, and retighten the clamping bolt.  Turn the engine clockwise with the crankshaft two crankshaft revolutions (1 cam revolution).  This will make sure you have the proper amount of slack on the tensioner side.  Recheck to make sure your marks are still aligned.  Then loosen the tensioner clamping bolt once again to let it self-adjust, and tighten the clamping and pivot bolts.  

After that, it's just a matter of putting everything back that you took off, but before doing anything, you may wish to consider that it's likely engine damage was done when the timing belt broke.  You may wish to pull the plugs and examine before you start anything mentioned above.  Evidence of anything hitting the plug is a sign of a valve broken off and probably a need for an entire engine.  You may also, after installing the timing belt, wish to bolt the crank pulley back on and see if the engine starts.  If the engine cranks quickly (lack of compression) and won't start, you've at least bent some valves and will need to remove the cylinder head. 

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The one item determining if this can be repaired is the condition of the keyway on the crankshaft and pulley. (the slot where the locating key goes) If the slot is severely damaged on either the crank or pulley, you will need to replace the damaged item. (if it's the crankshaft, its a really big job.) If it's not terrible, you can file it back to shape with a small flat file and get a new woodruff key. Chances are the majority of the damage is at the pulley. That should be changed. Otherwise, putting it back on is just a matter of sliding it on and tightening it up. (if you do this with hand tools, bring it to a shop afterwards and ask them to put an air gun on there to finish tightening.) You can usually get another pulley from any scrapyard far cheaper than a new one from dealer.

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