2

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

Improve this question

2 Answers 2

Reset to default
3

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.
Improve this answer
8
  • Awesome, thank you. Mind if I ask where you found it.
    – gSamp
    Dec 26, 2013 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.
    – Pᴀᴜʟsᴛᴇʀ2 ♦
    Dec 26, 2013 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, 2013 at 22:11
  • @Paulster2 These are not required to be replaced, they can be reused.
    – Move More Comments Link To Top
    Dec 26, 2013 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.
    – Move More Comments Link To Top
    Dec 26, 2013 at 22:17
0

The general consensus when tourqueing is to use a pattern that will flatten from the middle to the outside edges allowing a complete flat seal and equal pressure which will assist in straightening any small warping that may be present

Improve this answer

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .