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Crankshaft Pulley replacement help needed

462 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.

Crankset Bicycle tire Automotive tire Bicycle frame Automotive lighting
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See if you can just slip the new pulley onto the crankshaft. But first, check for the woodruff key. The key is set into a slot in the crankshaft. It prevents the pulley from spinning around. You can see on the pulley there is a matching slot for the key. If the key is not on the crankshaft, you can buy a replacement key. I can't recall whether on this engine it's possible for the key to drop down behind the timing cover. On some other engines, that can happen. That would not be good. If the key is not in the slot where it belongs, there is some possibility it's behind the timing cover. My suspicion is it dropped down there and the mechanic never knew it when they put the pulley back on. That would explain how the pulley came off. But if the key is still right where it belongs, you're good.
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.
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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.
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.
Check your oil level to see how much oil has been lost.
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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.
The rubber seal seals against the pulley. If you remove the pulley there is a gap between the seal and the crankshaft. Out of this gap, any oil being flung around for splash lubrication behind the timing cover can splash out. So in other words, the rubber seal is there, but it is not providing any seal, because of the sizable air gap between the seal lip and the crankshaft. Look at your own photo, the gap is about 1/4-inch. When the engine is not running, any oil behind the timing cover flows down by gravity into the oil pan sump, so nothing would come out from this gap. But if you look while the engine is running, you would see oil splashing out. The oil is not under pressure behind the cover, so it does not spray out with force, it just splashes out randomly. The further you drive with the pulley off, the less oil splashes out, because more oil has splashed out already, until there is not enough oil left to splash out. At that point, if you run the engine, and you see nothing coming out, then you know that you are possibly in quite serious trouble. Hope this helps.
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You can use the same pulley, even though they are not exactly the same. They are the same dimension but the damper is constructed differently.
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