How to find TDC?

Tiny
JEWELSLYNNE79
  • MEMBER
  • 2007 CHEVROLET AVEO
  • 1.6L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 135,874 MILES
How do I find the TDC on the vehicle listed above LS?
Friday, September 15th, 2023 AT 11:58 AM

3 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,320 POSTS
Hi,

To determine the top dead center, you need access to the crankshaft timing gear behind the timing cover.

There is a mark on the gear that aligns with a mark on the rear timing belt cover. Take a look at the picture below.

Let me know if that helps. Also, if you have other questions, let me know.

Take care,

Joe

See pic below.
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Friday, September 15th, 2023 AT 9:25 PM
Tiny
JEWELSLYNNE79
  • MEMBER
  • 11 POSTS
What do I do if the belt slipped when removing the motor mount? And we marked all the spots, but the belt had slipped so that would make it off time? Right? And how do we know if it's on compression or the exhaust side? So, if we reset the whole timing how do we do that? How many rotations can we do by hand on the crankshaft? Is it more than two?
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Sunday, September 17th, 2023 AT 1:46 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,320 POSTS
Hi,

If you align the marks, the number one cylinder will be at TDC. Also, I'm not sure why you would need to turn the crankshaft more than 180 degrees to achieve TDC.

As far as the belt slipping, yes, you need to make sure it is properly timed. If it slipped, the timing would be off.

Let me know.

Joe
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Sunday, September 17th, 2023 AT 1:21 PM

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