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Crankshaft Pulley replacement help needed

465 Views 21 Replies 7 Participants Last post by  MerryFrankster
2zz-ge engine, 2001 body.

I'm going to keep this short and save you all some second hand frustration. I picked up my car this weekend after 4 months of being repaired. New alternator, tensioner belt, PCV bleeder and some solenoid for VVTLI. After driving it for 1, one, hour at speeds between 55 to 75, I heard a loud clunk, looked in my rear view mirror to see if I ran over anything, and see the crankshaft pulley sailing away at ample speed. Took the next exit, looked at the engine, and yep its gone. Somehow the belt was intact too...Got a tow, and now car is at a friend's house.

My questions are:

1. Will this do any permanent damage to the engine?
2. Can I just get a new pulley and put it on there, route the belt and be fine?
3. Is there any way that I can see if the timing is incorrect without dropping the engine and removing the timing chain cover and looking at the teeth? Maybe through the OBD port?

I know a pulley tool can be rented from amazon and have all the manuals...just debating on calling an import/enthusiast shop in town and see what they charge because I live 40 minutes from where the car is located so I can't take other photos.

Open to suggestions/advice and thank you.

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I think that it will depend on how and why it came off. For example, is there a broken bolt in the crankshaft? Did the car overheat while the pulley was off? I doubt that the timing would change as long as the chain tensioner was good to begin with.
It didn't overheat much...temps got to 215 F and I ran the fans with the engine off, opened the frunk and lid. I think the bolt must have worked its way out of there. The nut/bolt was loose and I tightened it as best I could but wasn't torqued down...which I was counting on the person who worked on it to do that.
Hard to tell without a proper examination. Good thing you stopped at the earliest chance.
There is an oil leak from the picture. The timing chain cover may have to come out anyway. you mentioned to me that your mechanic was trying to fix an oil leak, did they by any chance remove the timing chain cover?
No, this was not removed. The leak was only from the PCV breather tube...I think that is the name of the tube near the backside of the valve cover at least.
PS. The crankshaft pulley does not affect the valve timing in any way shape or form. It's just along for the ride on the crankshaft. The timing chain is set onto a gear that is behind the timing cover.
Oh thank you so much, that makes me feel better already, Frank! The oil seal is there and I believe that is where the leak is coming from.
I assume you did not recover the pulley. The crank shaft looks a little buggered, but with some filing/polishing, a new keyway, bolt and seal, you might be good to go. Internal engine damage would be related to overheating if you ran it without the drive/serpentine belt turning the water pump too long. That said, your alternator would also not be driven so your electric fuel pump would have drained your battery pretty quickly, so I’m gonna guess that you didn’t overheat.
I was going 75 pulleys were recovered lol. The overflow tank cap did not pop out but the bottle was steaming a bit. The engine was run for less than 5 mins total after the pulley flew off. Temps never reached above 220 F from my readings with my code reader. (one was a few mins after the other so I guess it had cooled off 5 degrees from the first reading)
yeah pal you better believe it if you run the engine with the pulley off then oil is gonna gush out of that big gaping hole. There is oil lfying around in every direction back there, that's why the put a seal around the pulley.
Well, yes of course. But there is still a rubber seal present from when I looked at the hole. Oil wasn't on the ground when I parked the car and for the proceeding 6 hours until a tow truck came.
My opinion it is critical to know what happened to the Woodruff key. Potentially it could drop into the oil pan Which would not really be an issue. If on the other hand it is laying around with something that can get caught in the timing chain it would be very bad. Ask Frank mentioned your camshaft timing will not change. You will need the pulley, Bolt, key and seal at the minimum. Good luck
Very good, time to source those parts!
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