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Torque spec needed

Tiny
GEOVANNY
  • MEMBER
  • 2007 CHEVROLET SUBURBAN
  • 5.3L
  • V8
  • 4WD
  • AUTOMATIC
  • 210,000 MILES
Cylinder head torque and rock arms please.
Saturday, November 28th, 2020 AT 4:01 PM

11 Replies

Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
I attached all the torque specs for the head and those that attach to it plus the rockers. Let us know what other info you need. Thanks
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Saturday, November 28th, 2020 AT 4:53 PM
Tiny
GEOVANNY
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Thank you.
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Saturday, November 28th, 2020 AT 5:39 PM
Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
You are welcome. Please come back to 2CarPros in the future if you need some info. Thanks
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Sunday, November 29th, 2020 AT 9:25 AM
Tiny
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  • 6 POSTS
1 question. Is it normal that some intake valves (1, 4, 7) open less than the others or not?
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Thursday, December 3rd, 2020 AT 11:36 AM
Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
It is possible but there is no specific reason for that. So the question is, how much less are they opening? If it is significant then we need to inspect the components that are responsible for opening them and that is primarily the cam lobe. If you have a wiped out cam lobes then it will not open as much as the others.

Maybe get some pictures of the difference. If you have a micrometer set to measure the different would be great as well. If not, a millimeter ruler should work.
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Friday, December 4th, 2020 AT 4:00 PM
Tiny
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Yes please, and thanks.
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Friday, December 4th, 2020 AT 4:20 PM
Tiny
KASEKENNY
  • MECHANIC
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Sorry. Maybe I don't understand but I am asking you to get some pictures of the valves open to show the difference and if you can measure the opening of the valve at full lift.

So rotate the cam so that the valve is at full open and then measure it's distance from the surface of the head. This way we can see what the difference actually is. Thanks
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Friday, December 4th, 2020 AT 5:18 PM
Tiny
GEOVANNY
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  • 6 POSTS
Okay, I'll take some pictures and send them to you.
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Friday, December 4th, 2020 AT 5:35 PM
Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
Thanks. We will wait to hear back.
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Saturday, December 5th, 2020 AT 12:31 PM
Tiny
GEOVANNY
  • MEMBER
  • 6 POSTS
Okay, I think the intake valve problem is resolved. But now I have tightened the screws of the exhaust valves 1 2, 7, 8 and also the intake valves 1, 3, 4, 5 and I want to turn the crankshaft 360 degrees but it gets very hard shortly before reaching 360 degrees. It only rotates 270 degrees. I hope you can help me.
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Saturday, December 5th, 2020 AT 12:46 PM
Tiny
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Sounds like it is binding when you reach that point. Is it hitting something solid or does it just get tight?
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Sunday, December 6th, 2020 AT 2:47 PM

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