5.3 lifter replacement torque spec

[Swervin Erv]

I have a 2015 GMC Sierra 5.3 C engine; replacing some lifters and need to know the head bolt touque specifications.  Can anyone help?

Edited July 28, 2020 by 99silveradoz71

[M1ck3y]

On 7/26/2020 at 2:14 PM, Swervin Erv said:

I have a 2015 GMC Sierra 5.3 C engine; replacing some lifters and need to know the head bolt touque specifications.  Can anyone help?

Its not that simple. do you have it apart already.

[Swervin Erv]

Oh yeah, and ready to go back up with it.  Had a stuck lifter on #7 cylinder , I guess this AFM systm is hard on them.  I almost started o do a complete DOD delete on it.  It is my grandson's truck he  JUST bought  and had this running problem and a tune didn't fix it.  He  is in a rush for it,  I got a hold of the dealer he bought it at and they were helpful and gave me the head bolt torgue specs.  They were

1.  59 ft lb  then 90degree  and 60degree final torque.     It has been an experience not like the older cars .

[flyingfool]

call up your chevy dealer they'll tell you.   I like to do a stage torque pass in 3rds, before hitting the final torque spec. then do the final degree torque  pass

 

i would suggest switching to 5w-30  or 5w-40 oil , stop using the watered down 0w-20 stuff,  

Edited July 29, 2020 by flyingfool

[hollywoodsle]

 

Sorry it's grabbing both of my screens ignore the top portion

 

 

Edited July 28, 2020 by hollywoodsle

[amxguy1970]

1 hour ago, flyingfool said:

call up your chevy dealer they'll tell you.   I like to do a 3 stage torque pass before hitting the final torque spec. then do the final degree torque  pass

 

i would suggest switching to 5w-30  or 5w-40 oil , stop using the watered down 0w-20 stuff,  

So with how tiny the passages are and how the oil is vital to access and control you suggest going thicker versus the hundreds of thousands of hours of testing with engineers who have degrees specifically in the field and have been working and testing specific failures and results?   It isn't like tolerances have gotten much tighter over the years since 5-30 was the norm  Kind of wondering about your name now...

 

Tyler

[flyingfool]

gm engineers built a great product, GM analyst come up with ways to limit the lifespan of the trucks, so you go buy another one in 5-8 years, instead of keeping the truck for 30 years

 

one example is the trans t-stat that is wreaking havock on these trucks and thier reliability  to function over 80,000 miles

Edited July 28, 2020 by flyingfool