1990 Toyota Celica Timing Belt

Hi Robb1,

When the timing belt sheared off some teeth, some valves could have been fully open so when the pistons hits them, it will not turn.

They say my engine 5S-FE is a non-interference engine. But when I got the timing belt off the teeth were ripped off the belt at the main crank gear.But the Belt seemed to be in good condition other than that.Tried to get the engine on TDC the top main cam gear will not make a complete revoloution around, it hits and will not turn. So Im thinking bent valves but they say my engine is non-interference
So what's going on?

Hi Robb1,

Non interference is when belt broke, the valves are either fully or almost closed. Turning th camshaft with the piston at TDC would become an interference engine. When turning the camshafts some valves need to fully open so it will touch the piston top.

Turn pistons away from TDC then turn camshaft to desired position. After that only turn to TDC.

I tried what you told me and I got the same result.

Hi Robb1,

Did you turn the crankshaft away from TDC far enough? If not the pistons would still be very high.

Turn crankshaft 90 degrees away from TDC. Even if the valves are bent, you should be able to turn the camshaft if the pistons are not too high.