timing belt skipped teeth

[tsi87889095]

I am rebuilding my head and when i disassemble the timing belt i rotated the motor so that all the timing marks lined up and i noticed that the belt had skipped to teeth. I got lucky but i want to know what caused this. I did all the timing about 20000 miles ago with all new hardware. Do you think my tinsionor is bad or did i mess something up when i put it all back together 20000 miles ago. Thanks for the help.

 

[thomcasey]

Did you also replace the tensioner when you performed the timing belt work? IF you did, it is possible that you were already off a bit. I found it worked best that when I changed my timing belt, I used two medium folder clips and used those to hold the belt on the cams with the belt tight on them and the dowels set properly. If there was any slack up there when you installed the belt, then it could have already been off.

Otherwise, even with a good tensioner, if you did not get it tight enough before releasing the pin, then it may not have set the belt tight enough.

 

[Friend-O]

No way to tell specifically but a loose belt could jump possibly. Just be sure to check the tension to spec after install with a ruler or caliper. The exhaust cam has a tendency to want to rock back two teeth upon belt install so that may have been the cause too. Goo thing the valves are ok !

 

[jtalton626]

If you need any assistance, I live 30 minutes down the road in mocksville.