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I am trying to find the head bolt sequence for a 2004 Chevy 4.3L V6 S10 truck. I have managed to find the torque specs but the site I found them on does not list the order they should be removed or installed. The only site that has mentioned anything about order is ehow.com, but the page was generic for 4.3L engines instead of specific to my make and model, which makes me nervous. As I understand it, there should be a very specific order the head bolts need to be removed and replaced in.

The site I found the torque specs on: Link
The site I found a sequence on but am unsure about: Link

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1 Answer 1

up vote 3 down vote accepted

Here is the sequence

enter image description here

Preferred Method is as follows

  • All bolts first sequence 22 ft. lbs.
  • Long Bolt Final Pass in Sequence 75 degrees
  • Medium Bolt Final Pass in Sequence 65 degrees
  • Short Bolt Final Pass in Sequence 55 degrees

Optional Method

  • First Pass in Sequence 26 ft. lbs.
  • Second Pass in Sequence 44 ft. lbs.
  • Final Pass in Sequence 66 ft. lbs.
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Awesome, thank you. Mind if I ask where you found it. –  gSamp Dec 26 '13 at 22:05
    
@gSamp ... these are torque-to-yield bolts. Ensure you are using NEW bolts when you put things back together, as the old (original) ones only have one use in them. –  Paulster2 Dec 26 '13 at 22:08
    
@Paulster2 Thank you for that, I had already decided to replace the bolts since we were going to have it open anyway. Nice to know that was a good decision. –  gSamp Dec 26 '13 at 22:11
    
@Paulster2 These are not required to be replaced, they can be reused. –  Larry Dec 26 '13 at 22:15
    
@gSamp That engine as been around for a while and the diagram can be found online in many places including forums. Auto Zone has free service information as well. I did look up the specs in a manual to confirm they were correct. –  Larry Dec 26 '13 at 22:17

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