Setting Top Dead Center?

Tiny
HD2424
  • MEMBER
  • 2003 CHEVROLET SILVERADO
  • 5.3L
  • 4WD
  • AUTOMATIC
  • 266,000 MILES
When I set top dead center, I know the dots on cam and crank are aligned at 6 and 12 and number one piston is all the way up. My question is, when number 1 piston is up. Is supposed to be flush with top of block or supposed to be down about an 1/8 or so? Engine is 5.3.

Thanks
Monday, October 3rd, 2022 AT 5:00 AM

4 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 50,520 POSTS
Here are how the timing marks should line up in the images below and yes, the #1 piston should be at the top, not down at all.

Here is a video of the job being done as well:

https://youtu.be/mrp9YXPaYFg

Check out the images (below). Please let us know if you need anything else to get the problem fixed.

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Monday, October 3rd, 2022 AT 3:37 PM
Tiny
HD2424
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Thanks.
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Monday, October 3rd, 2022 AT 3:54 PM
Tiny
HD2424
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Thanks
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Monday, October 3rd, 2022 AT 3:54 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
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Use 2CarPros anytime, we are here to help. Please tell a friend.
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Tuesday, October 4th, 2022 AT 1:51 PM

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