Setting Top Dead Center?

2003 CHEVROLET SILVERADO
266,000 MILES • 5.3L • 4WD • AUTOMATIC
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HD2424
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  • 190 POSTS
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
Oct 2, 2022 at 10:00 PM
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STRAILER
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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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Oct 3, 2022 at 8:37 AM
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HD2424
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  • 190 POSTS
Thanks.
Oct 3, 2022 at 8:54 AM
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HD2424
  • MEMBER
  • 190 POSTS
Thanks
Oct 3, 2022 at 8:54 AM
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STRAILER
  • ✓Experienced Mechanic
  • 55,267 POSTS
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Oct 4, 2022 at 6:51 AM
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