Are my valves bent?

[CurtTSI]

A few days ago, while driving my car, I heard a rubbing noise an a few seconds later the sound of a belt breaking. The car lost power and costed to a stop. I immediately assumed it was the timing belt. However, I removed the top timing belt cover and found it to be intact. Had it flatbedded home for further examination. I discovered that the crankshaft pully had seperated and stuffed the A/C belt inside the lower timing belt cover. B-belt was also still intact. When I aligned the timing marks on the 2 camshaft sprockets, I discovered that the timing mark on the crankshaft sprocket was positioned 5 belt ribs counter clockwise form the timing index on the engine. What do you think? Did this bend my valves? What should I check next?

 

[DSM4DSM]

You may have lucked out and got out of it unscathed. However, best bet is to perform a compression and leak down test. See if any air is escaping past any of the valves

 

[fivestardsm]

http://www.dsmtuners.com/forums/showthread.php?s=&threadid=115999

Leak down test link on this page. Check it out and youll find out.

Steve.

 

[CurtTSI]

Originally posted by DSM4DSM
You may have lucked out and got out of it unscathed. However, best bet is to perform a compression and leak down test. See if any air is escaping past any of the valves

Won't the compression test be affected by the piston stroke being somewhat out of sync with valve opening. After the crankshaft pulley came apart, I had the impression that the engine was still running, but producing very little power. At that point, I got off the gas and put it in neutral. At that point the engine just died. Is there any way to reposition the belt on the crank sprocket without having to take the whole thing apart, as in a complete belt replacement?

 

[CurtTSI]

Well, I figured out a way to slip the crankshaft sprocket, inside the timing belt and align the timing marks. Unfortunately, the engine tested no compression. Looks like I trashed the head. Don't know what to do with it now. Fix it, have it fixed, sell for salvage or part it out myself. Only has 81K miles on it and otherwise is in nice condition. Can someone who has had this done tell me the approximate cost. Guess my C5 Vette will become my regular driver now, but I still like the Talon.

 

[1992LaserRSAWD]

I just did mine last week. My balance shaft belt shattered and the pieces got logged in the main timing belt. That threw my timing off and bent all 8 of my intake valves and 1 of my exaust valves. I just bought a reman. head. I also replaced all of the timing components and the water pump while I was in there. Total for all the parts was around $700 and I did all the labor myself.

 

[leet]

700 sounds about right for a stock remanned head.

It's when you start upgrading the valvetrain and porting/polishing, that it gets expensive.