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Confusing timing issue

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mantega4g63

10+ Year Contributor
332
22
Apr 15, 2012
Charlotte, North_Carolina
So, when I did my timing i took off the crankshaft pulley to replace the leaking seal. I noticed before i took it off the crankshaft key was a degree below 9aclock, just one notch. But the pulley lined up correctly to the timing cover degree. Can anyone make sense of this? I put it back how it was and my idle is rough, i know i have a boost leak and other issues but i upgraded the roll stops, changed all water hoses + pump, and oil
 
Since you had to take everything off to get to the seal, you should have had the belt sprocket timing marks aligned back up with the timing mark on the oil pump housing (which contains the main crank front seal) and the two cam alignment marks. And we have to include the autotensioner tab adjustments as well. These are what you really need to pay attention to, not the notch on the crank pulley along with the cover marks.

What I do before I do a teardown like that is to have the timing marks at TDC - just to make it easier on me when I reassemble knowing that I have the crank at TDC and redoing the timing is a breeze.

Sounds like your timing marks didn't all match up on when you put the belt back on - why of the bad idle.
 
Guess what? I just thought of this.

I bet your Harmonic Balancer pulley is beginning to fall apart.

The outer part of the pulley is beginning to slip around the inner section causing this unique key placement issue. Thus, you're timing the unit on a mark on the pulley that is not in its original place. you're timing it very retarded and not knowing it.

The rubber is getting tired and not holding the two metal sections in their respective places.

Check this one out. - good luck .. DSM
 
Guess what? I just thought of this.

I bet your Harmonic Balancer pulley is beginning to fall apart.

The outer part of the pulley is beginning to slip around the inner section causing this unique key placement issue. Thus, you're timing the unit on a mark on the pulley that is not in its original place. you're timing it very retarded and not knowing it.

The rubber is getting tired and not holding the two metal sections in their respective places.

Check this one out. - good luck .. DSM

This is an excellent post/response, sounds like this would be my issue. Any other ideas though?
 
It sounds like you guys are talking about ignition timing and mechanical timing as if they are the same thing. Mechanical timing has nothing to do with the harmonic balancer. The marks on the sprockets/pulleys have to be right underneath the cover. There are no exceptions. The key doesn't matter either. It just keeps the sprocket and plate in line. The plate does have to go on correctly, there is only one correct way. You have no way to change ignition timing on a 97 so a bad harmonic balancer wouldn't cause this problem because you didn't change ignition timing. Double check your timing marks, they are probably wrong. Double check your tension also. This is not a shot but are you 100% sure you know how to complete this job correctly? If you're not 100% sure I'd get some help.
 
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I'm 90% sure but ive had help from the start from my dad who restores cars and used to own his own shop. Hes old school but knows his stuff no doubt. The key was out of alignment the whole time but the pulley lines up right, and cams are correct on timing along with the oil pump. We went by the haynes manual, so idk its clearly an issue with my car
 
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I'm 90% sure but ive had help from the start from my dad who restores cars and used to own his own shop. Hes old school but knows his stuff no doubt. The key was out of alignment the whole time but the pulley lines up right, and cams are correct on timing along with the oil pump. We went by the haynes manual, so idk its clearly an issue with my car

What do you mean that the crankshaft key was out of alignment. It slides into the groove in the crank and the pullies slide over it. There is only one way for it to fit in the crank and only one way for the pullies to fit on it. The separator plate is the only thing that can be put on wrong.
 
How is it even possible to do that. The harmonic balancer and cover are removed to do this job.

I think some people are confusing the cam timing with ignition timing. That is the only reason that i could think people could some how relate the mark on the timing cover with installing a timing belt.
 
Some of us do have a CAS unit that needs to be adjusted when doing base timing.

What the OP needs to do is go back to square one since he has the cover off: Get all marks aligned back up -both crank sprocket and cam sprockets (and BS sprocket marks if used) and see if there is any differences with the marks on the sprockets all aligning up to their respective marks and go from there...and not worry on that fool crankshaft key since it's not' going to move or go anywhere.

DSM
 
I would double check you r mechanical timing, but you probably have it right since it runs. Most likely your CAS kust needs adjusted. You can either use you timing marks on you timiming cover like it sounds like you did to set it to 5°you or you can use an adjustable timing light and set it 5°a and adjust thr CAS till your cam gear marks line up exactly. Ill post a link so you can see what I'm talking about.
 
It has to be mechanical timing. On 2g's a timing light is not needed and I am sure he didn't touched the cas to replace the t-belt.. if timing marks are 100% fine then look elsewere.. boost leaks, spark plugs/wires..
Pics of the marks would help a lot!
 
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