LT5 Assembly Project - ZR-1 Net Registry Forums

phrogs · 10-18-2008

I still have to pull up the BS flag on the head bolts...

Who else here has worked on a LT5 and replaced the head bolts?

just curious

10-18-2008

Quote:

Originally Posted by phrogs

I still have to pull up the BS flag on the head bolts...

Who else here has worked on a LT5 and replaced the head bolts?

just curious

Re used the bolts in my 368 build. For the 402 it will either be studs or new bolts.

Pete · 10-19-2008

I can't remember how many times my head bolts have been reused.

Also know a few other LT5's reusing head bolts more then once,they all run strong with no issues.

I will take all those junk used head bolts you guys have.heheheheheh
I will also call BS on this.
Pete

lbszr · 10-19-2008

Reused mine two years ago with no problems.

I can't find anywhere in the gm fmm where it says to replace them as it does for main and rod bolts.

If I remember right they didn't have any taper in the middle section so they didn't look like torque to yield bolts to me.

Zr1 Destroyer · 10-19-2008

Quote:

Originally Posted by phrogs

I still have to pull up the BS flag on the head bolts...

Who else here has worked on a LT5 and replaced the head bolts?

just curious

I re-used my bolts from my 368 for the 415 build and all is fine.......just turned them a few extra degrees with the wheel on the end of the torque wrench. I also re-used my head bolts on my old Z when I did the ported lpe heads from nj.

-=Jeff=- · 10-19-2008

Yeah but LGAFF has NO Head Bolts.. that is the issue

Zr1 Destroyer · 10-19-2008

Quote:

Originally Posted by -=Jeff=-

Yeah but LGAFF has NO Head Bolts.. that is the issue

Hmmm...nj has a surplus on these.....I'll ask him if he wants to get rid of some. He also has five extra sets of cams also he wants to punt.

LGAFF · 10-19-2008

It seems to me the tool is only needed to locate the proper hole, which I believe they state is at about 51 degress BTDC. The hole for cam timing is deeper that the others, and the pin tool drops flush in the proper notich. I would think that one could use a measured dowel to accomplish the same running a few rotations to ensure that you chose the correct notch.

LGAFF
92 ZR1
#234

Zr1 Destroyer · 10-20-2008

Quote:

Originally Posted by LGAFF

It seems to me the tool is only needed to locate the proper hole, which I believe they state is at about 51 degress BTDC. The hole for cam timing is deeper that the others, and the pin tool drops flush in the proper notich. I would think that one could use a measured dowel to accomplish the same running a few rotations to ensure that you chose the correct notch.

LGAFF
92 ZR1
#234

You could for sure do that, but the pin lock tool was in hand at the time of my build and made life easy for a moment during my last build.

10-18-2008	#1
phrogs Join Date: Jul 2004 Location: Kalamazoo MI Posts: 1,760	Re: LT5 Assembly Project I still have to pull up the BS flag on the head bolts... Who else here has worked on a LT5 and replaced the head bolts? just curious __________________ JOHNNY P Currently own 90 ZR-1 #845 DRM 500 engine package 90 #226 Parts car Hit me up if you need anything.

10-19-2008	#3
Pete Join Date: Dec 2003 Location: Chicagoland,IL Posts: 2,667	Re: LT5 Assembly Project I can't remember how many times my head bolts have been reused. Also know a few other LT5's reusing head bolts more then once,they all run strong with no issues. I will take all those junk used head bolts you guys have.heheheheheh I will also call BS on this. Pete __________________ '91 #1635 PoloGreen 350 LT5 11.09 @ 129.27 11.04 @ 128.86 474RWHP 400RWTQ http://www.youtube.com/watch?v=SFNFOhGGlR4 http://www.youtube.com/watch?v=ZlRIOMwaDYY https://sites.google.com/site/peteszr1garage

10-19-2008	#4
lbszr Join Date: Nov 2006 Location: dayton,ohio Posts: 424	Re: LT5 Assembly Project Reused mine two years ago with no problems. I can't find anywhere in the gm fmm where it says to replace them as it does for main and rod bolts. If I remember right they didn't have any taper in the middle section so they didn't look like torque to yield bolts to me. Last edited by lbszr; 10-19-2008 at 02:13 AM.

10-19-2008	#6
-=Jeff=- Join Date: Jul 2007 Location: Bartlett, IL Posts: 7,161	Re: LT5 Assembly Project Yeah but LGAFF has NO Head Bolts.. that is the issue __________________ 1990 Corvette ZR-1 #1051 Watson Headers (2" Primary) - Flowmaster Cats - Borla Catback Late Model IH - Plenum Coilovers - 4.10s Shelby Series 1 - Wilwood Brakes Custom Interior NCM Lifetime Member #978

10-19-2008	#8
LGAFF Join Date: Mar 2007 Location: Crystal Lake, IL Posts: 7,180	Re: LT5 Assembly Project It seems to me the tool is only needed to locate the proper hole, which I believe they state is at about 51 degress BTDC. The hole for cam timing is deeper that the others, and the pin tool drops flush in the proper notich. I would think that one could use a measured dowel to accomplish the same running a few rotations to ensure that you chose the correct notch. LGAFF 92 ZR1 #234