1990 Toyota Celica Timing Belt

Tiny
ROBB1
  • MEMBER
  • 1990 TOYOTA CELICA
  • 4 CYL
  • 2WD
  • MANUAL
  • 295,000 MILES
I drove the car for about 10 miles, Everything was fine Shut the car off for about 30 minutes went to start the car, I got the starter grinding with the flywheel then finally the motor cranked over but the timing belt is not turning. I understand that the timing belt probably sheered off the teeth of the belt but why did it lock up?
Saturday, June 14th, 2008 AT 6:06 PM

5 Replies

Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
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.
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Monday, June 23rd, 2008 AT 12:46 PM
Tiny
ROBB1
  • MEMBER
  • 3 POSTS
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?
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Thursday, July 10th, 2008 AT 12:31 PM
Tiny
KHLOW2008
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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.
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Friday, July 11th, 2008 AT 8:16 AM
Tiny
ROBB1
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I tried what you told me and I got the same result.
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Saturday, July 12th, 2008 AT 2:14 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
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.
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Saturday, July 12th, 2008 AT 11:18 PM

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