9 replies to this topic

[Justin Fowler]

Just finished my engine rebuild and started putting on the timing belt. I got everything aligned and it looked great until I started spinning it over to make sure my marks are right on.

Seems when I turn the motor over the belt slowly moves backwards towards the rear of the engine and starts to rub against the plate that bolts behind the cam gears. I installed everything exactly how I removed it and before my rebuild I did not have this problem. The ONLY difference is the crankshaft pulley gear for the timing belt. I had to damage it to remove the old one so I got another one off of a guy here locally, same 1.8 engine and exact same pulley so I wouldn't think that is the problem. The old gear is the only thing I had touched and damaged during the tear down, any suggestions?

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[Keith Novak]

Possibly installed the pulley gear with the flanged side towards the front instead of the rear where it keeps the belt from slipping too far back?

[Justin Fowler]

thanks for the response, but the gear is put on correct. if the gear moves forward just a tad bit it aligns everything, but when it slides back after the crankshaft pulley is put on it will start making the belt rub.

[Keith Novak]

The gear moves backwards as the crank bolt is tightened? That shouldn't happen. It's a sandwich of flat steel plates and a big bolt holding them together. Nothing should move front to back when you tighten the bolt. If it's moving too far back, the backstop is the protruding edge of the crank. Thrust washers should be keeping that from moving front to back.

[Justin Fowler]

the crank itself is not moving, what I meant was when I only have the timing pulley on it will work fine if I do not slide it all the way down the crank, but when I put the crank pulley (the ac/alt pulley) on it will push the timing pulley down the nose of the crankshaft, I am about to double check everything once again to try and figure this out. I just don't get whats going on.

[Keith Novak]

Something really isn't making sense now. What year engine is that? I've been playing with my engine, and one I have half assembled looking at the gear and pulley when it struck me that thermostat housing doesn't look anything like my '95 1.8

[Justin Fowler]

well on this car it is a 93 1.8 swapped, this is my DD not my spec car. For some reason I feel it may be that my key is to far in when I installed it, idk why but thats what I think may be causing it. I will re-due all of this tomorrow morning and see if it comes out any better.

[davew]

You have an allignment issue with one of your pulleys. Inspect that everything is installed correctly. Especially the crank key. There is only one correct way to install the key and 7 wrong ones.

I had a water pump that was machined wrong. The flat parts, where the idler pulleys bolt on where not square with each other. This could be your issue.

Dave

[Justin Fowler]

What did you have to do on the water pump? Get a new one? I have a new one on there now maybe I should clean up and install the old one and give it a try. The pulleys were tightened after the belt was installed, maybe I need to completely tighten the idler before installed as for maybe it was slightly wedged, I am going to give this a try first.

[Justin Fowler]

Seems everything I try gives the same problem. I can't find my old waterpump to try a different pump but I have reversed the timing belt (a lot are directional), reinstalled all my pulleys, even tried putting shims between the pulleys and nothing is working. Looks like the engine may be sitting for another week