I think I just screwed up my motor :(

[danny_l_2005]

First i'll start by showing my feelings ... . my newly bought 90 tsi awd just messed up on me. The motor was new. But the starter wasn't. I needed to push start it. So not even 15mins ago, we were push starting it and heard an ugly noise when we did. so we tried and tried, would turn on. When we got it back on the driveway, I decided to just try to see if the starter would for once work. So it did, it moved the flywheel. I told my friend to try to start it because it wouldn't start. I saw the most terrifying thing. The timing belt wouldn't move but the alternator belt did . So now cams aren't moving. Did a compression test and checked the first cylinder... 0psi . Ill show you where my cam timing marks look like. Before there were alot closer but not where they were suppose to be. Can someone tell me why does the timing belt doesn't move. (pistons move and pistons don't look damaged seeing it through the spark plug wells.)

 

[motomattxxx]

The keyway on the crankshaft timing belt cog is sheared or the timing belt teeth are stripped off on the timing belt at the crankshaft. DO NOT attempt to crank it any more! you will only do more damage, right now the valves and guides might not be that bad. You wont be able to see damage to the pistons through the spark plug holes because the valves hit the piston on the outside edges where you cant see it with the head installed.

 

[boosted92laser]

The timing belt might have broken inside the front cover. Take it off and see where it broke. Also make sure the tensioner and idler move freely.

 

[Defiant]

The crank sprocket chewed its teeth off the belt.

 

[spinz4]

Bad news for sure!

 

[luv2rallye]

Well you needed more practice doing another valve job anyway right?

 

[snox135]

You may have not bent any valves. The cam is just holding the valve open because they still are not turning.

 

[drewvr4]

well ill state the obvious...your 180 out on your exhaust, and if the motor ever did turn over your def. in for some new valves

 

[1gcrazy]

well ill state the obvious...your 180 out on your exhaust, and if the motor ever did turn over your def. in for some new valves

Not so true...I helped do a timing belt on a 2g a few weeks back and he had the belt on 180 out and fixed it and it ran fine....I thought it was wierd as all hell....Maybe it had some bendage but we didn't know it. I havn't seen the car run after that though so...

 

[danny_l_2005]

Today i'll be doing my first new timing belt job. I hope nothing bad happen (no bent valves) because the car wasn't running. But i was cranking it. I'll see from there

 

[BUCK]

& do yourself a favor & put a new Starter & CABLE on while you have the Head off - MUCH easier - Good Luck

 

[snox135]

well ill state the obvious...your 180 out on your exhaust, and if the motor ever did turn over your def. in for some new valves

Defintily not true, I skipped the belt real bad on my Laser while driving. I had the valves checks and they were fine.

 

[Splitpi]

Today i'll be doing my first new timing belt job. I hope nothing bad happen (no bent valves) because the car wasn't running. But i was cranking it. I'll see from there

Why don't you save yourself some effort and take the head off now, rather than do the timign belt, realize you have bent valves and have to take the timing belt off again.

 

[dsm-onster]

Because a valve job is tedeous at best and expensive at worst. . . It's 6 of one, a half dozen of another!

To the original poster, I've infact had my valves bend and then drove them around and they bent back straight again. This occured on my n/a 92 2.0 and my turob 1990. . . enough to record 145+ psi across the board! But don't take my word for it. Just replace the tuming belt because it doesn't involve a new head gasket and pulling the head. If it runs, run a compression check. and let us know what happens.

 

[Defiant]

Because a valve job is tedeous at best and expensive at worst. . . It's 6 of one, a half dozen of another!

To the original poster, I've infact had my valves bend and then drove them around and they bent back straight again.

No. You may have had no compression reading because the timing was that far off, but there is no way valve springs are going to be strong enough to straighten bent valves. No way.

 

[motomattxxx]

No. You may have had no compression reading because the timing was that far off, but there is no way valve springs are going to be strong enough to straighten bent valves. No way.

Rof.

 

[danny_l_2005]

Like always Defiant is always right. The timing belt teeth got chewed up by the crank sprocket. Sorry if I took long to update, but its because it has been raining til yesterday. So I got two options: Take off the head or put a new timing belt. Im going with changing the timing belt, because if I take off the head to know that the valves are fine it would be a waste of time. Now I won't be installing a new timing belt until Sunday or Monday, So i'll keep yall updated.

 

[Defiant]

Sorry to be right, but be prepared to take the head off. The valves are almost inevitably bent.

 

[motomattxxx]

The keyway on the crankshaft timing belt cog is sheared or the timing belt teeth are stripped off on the timing belt at the crankshaft. DO NOT attempt to crank it any more! you will only do more damage, right now the valves and guides might not be that bad. You wont be able to see damage to the pistons through the spark plug holes because the valves hit the piston on the outside edges where you cant see it with the head installed.

Whoa there! I think I nailed this one.

 

[danny_l_2005]

Let me just say... Opening the head wasn't a very good idea . I just took the head off, and well... valves look great. pistons were hit before maybe of a past incident. Now that I have the head off, what would you guys recommend on doing? I post pictures later tonite.

 

[dsm-onster]

Did you run a compression check? Valves can appear not to be bent. . . A quick "wet check" is probably in order.

 

[xceler8]

You don't necesarily know if the valves are all alright. If you just looking at the heads of them, You need to inspect one ata time and pull it out to be sure that it's not even slightly bent. Keep in mind that if you have marks on your pistons from hitting the valves, thenyour going to have some bent valves. Not necesarily noticably bent, but enough to cause problems. I would recommend taking your head to a machine shop and spending the money for a inspection on it. Won't be much, maybe $100.

 

[danny_l_2005]

So what other methods other than taking it to the machine shop is there to check the valves. dsm-onster how do I do that "wet check"? I can't do a compression check because I took off the head. I wouldn't like taking my head to the shop, thats why I took off the head by myself to reduce cost of labor. Oh by the way, I think the previous owner lied to me about having JE pistons... looks more like stock pistons to me.

 

[Splitpi]

Looks like stock pistons to me.

 

[talonracn49]

Wet check.

Turn head upside down. Fill area with valves full of a lightweight oil. Leave for a while and come back.

Did the oil drain out? Bad valves. If oil is still in, valves are good.

Just realize that there is more to the valve train than just valves. You may have torn up a guide or two also.

If it was my car, I would take the head and have it checked by a pro. This part of your car is the one that takes the brunt of high rpm beatings and you want it to be perfect.

Note: Looks like those are new marks on the pistons btw...(from valve contact)