Timing belt was chewed up by the crank pulley

[cano86]

Hey guy I havent been in the forums in a while but I've been busy. Now for the problem please read below and help me.

-My car's turbo had shaft play in it so I knew it was going to go soon but before I could replace it, I was on my way home from work and the car started stalling and smoking so I knew it was the turbo that went. I opened the hood and checked the IC piping and they where filled with oil from the turbo as the shaft broke. So I close the car and next day I had it towed to my house.
-I bought a new T25 and started taking out the broken turbo and then put in the new one, Then after the new one was installed I checked if everything was ok and in place and everything seemed ok no leaks or anything like that.
-So I decided that since everything was ok to start it up. I tried cranking it and it felt like there were no spark so I checked the plug wires and they did had spark, then I told my dad to crank it while I look at it under the hood and thats when I notice that the crank was turning but the cams weren't which is weird because the timing belt was new and when I checked it the Timing belt was chewed up by the crank pulley area.

Now my main question is. What cause the timing belt to get chewed up just by the turbo breaking up? any help is highly appreciated.

 

[mindset]

It could be the timing belt tensioner. They are very common to go bad. Besure that you didn't mess up your timing the next time you go to start it up.

 

[cano86]

I havent had time to fix it, I already bought the timing belt but with this snow I cant do nothing right now. I'm going to have to remove the valve cover before installing the new timing belt just to make sure the valves aren't bent at this point it seems like they are ok because the engine cranked freely and there was no resistance on it or anything like that, so am hoping everything is ok.

 

[MrBoxx]

The oil pump could have seized, the balance shaft belt could have broken, the balance shafts could have broken/seized. You won't know until you take everything apart.

 

[cano86]

Hey I checked today for bent valves and thanks god, all the valves are ok. Thankfully when the timing belt got chewed up the cams where at the position that all the valve are close.

Now the tensioner is also in good condition and the oil pump did not seize either. Now am going to try and put it back together whenever I get a chance since is already going to snow tomorrow again darn it. I just hope the balance shaft didn't seize up since thats the only thing I havent been able to check. any opinions on anything else that might be wrong are welcome.

 

[DSM1G90]

Definitely sounds like something collapsed in the belt area for the belt to hop over the crank sprocket - in which, when the belt went slack , the cams automatically roll to the closed position to have all valves closed, and saving the head.

I had that happen to me a few moons ago on a SOHC motor - tensioner pulley bolt worked loose and shut me down very quick..with all valves closing.

NOW, here's a simple test to 'condemn' this area: Roll the crank to where you're 90* off TDC (get all the pistons at the same height in the block and away from the valves), put a 17mm wrench on those cams to see if they rotate completely..and freely. Why I say this is that you say that your tensioner and oil pump pulley is okey. Thus, you've already 'condemned' that section of the block.

Good Luck - DSM

 

[cano86]

Yeah I did that earlier today thats why am going to put everything back together. I checked the valves by rotating the cams and everything was fine