5.3 vortec head bolt problem PLEASE HELP

Reply Subscribe

Thread Tools

Search this Thread

Jun 25, 2014 | 07:22 PM

209SlowLS1

Thread Starter

Teching In

iTrader: (1)

Joined: Mar 2011

Posts: 37

Likes: 0

From: Stockton, CA

5.3 vortec head bolt problem PLEASE HELP

So I'm in the process of installing the heads on my 05 silverado but Ive run into a problem. I torqued it exactly as specified in the manual which was something like 22ft lbs then 90degrees then another 90 but they don't feel tight enough. I didn't have to put any elbow grease into it. Someone please help. =(

Jun 25, 2014 | 08:07 PM

AKAFRED

Launching!

iTrader: (1)

Joined: Jul 2005

Posts: 278

Likes: 0

did you clean all the crap out of the threads in block? no water or dirt in there?

Jun 25, 2014 | 08:19 PM

209SlowLS1

Thread Starter

Teching In

iTrader: (1)

Joined: Mar 2011

Posts: 37

Likes: 0

From: Stockton, CA

I cleaned them out with a air nozzle I'm going to pull one tomorrow and check the threads I think that might be the case. Ive heard of people getting false readings with a little bit of crud in them. I was just thinking it was weird that they all are doing the same thing.

Jun 25, 2014 | 08:22 PM

209SlowLS1

Thread Starter

Teching In

iTrader: (1)

Joined: Mar 2011

Posts: 37

Likes: 0

From: Stockton, CA

I was thinking it might be that the torque wrench I used wasn't calibrated correctly and that I started lower then the 22ft lbs.

Jun 25, 2014 | 08:51 PM

ZONES89RS

In-Zane Moderator

iTrader: (25)

Joined: Jan 2007

Posts: 11,941

Likes: 33

From: Conroe, Texas

I use the Chinese head studs. Then it's no problem.

Jun 25, 2014 | 08:55 PM

AKAFRED

Launching!

iTrader: (1)

Joined: Jul 2005

Posts: 278

Likes: 0

if you pull bolt you have to replace bolt.. factory style bolts are one time use.

Jun 25, 2014 | 10:27 PM

fleetmgr

TECH Addict

Joined: Jun 2009

Posts: 2,012

Likes: 0

From: Tulsa, OK

^^ Just what I was going to say. Anytime you have a torque spec that is measured in degrees of rotation, you're dealing with a single use bolt that goes in the trash the next time it gets removed. The process is called torque to yield, and depends on bolt stretch to attain the required clamping force.