LT5 Assembly Project - Page 2 - ZR-1 Net Registry Forums

tomtom72 · 10-18-2008

raising my hand from the back of the class.......I'd be right along side TomC taking notes & downloading stuff!

Thanks for taking the time to ask and do this for us!

Tom

HIZNHRZ · 10-18-2008

Unless I become independently wealthy in the very near future, my plans for going deep inside of an LT5 are to watch you do it. With that said, I'd really appreciate the opportunity to watch and learn.

Chris_32212 · 10-18-2008

i shall make a peagan sacrifice to please the LT5 gods

so you may have good fortune during the project.

good luck buddy

Chris

LGAFF · 10-18-2008

I am watching the LT5 training video right now, wondering WTF was I thinking.

This should be fun, I am going to start with some pics tomorrow of what I have and some of the issues I am facing with regard to repairs, etc.

I picked up a set of ported LT5 heads, and the matching block. The block ingested a screw, so there is some damage to a few pistons, I think I will only need 1 liner and 1 piston. The heads are another story, they have 1 crossed threaded IH bolt, and they are ported alittle too much where the IH meets the head, so there is some welding warranted to make sure the IH seals properly.

LGAFF
92 ZR1
#234

WB9MCW · 10-18-2008

Soundz like a nice winter project. Maybe if you invite us we might swing by for a garage visit and some bench racing too boot. ???

phrogs · 10-19-2008

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

10-19-2008

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

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.

LGAFF · 10-19-2008

OK here is the skinny on the block/heads.

Engine is out of 90 #702. I bought the heads, they were ported with a valve job. The short block has about 40K miles on, although it seems like it has more). Notice the port is siamesed, and althought the 2ndry port is over 36mm the primary port needs to be opened some. Also notice that the porting left little sealing surface area where the IH bolts on.

10-18-2008	#11
tomtom72 Join Date: Dec 2004 Location: Jacksonville, FL USA Posts: 4,645	Re: LT5 Assembly Project raising my hand from the back of the class.......I'd be right along side TomC taking notes & downloading stuff! Thanks for taking the time to ask and do this for us! Tom __________________ 1990 ZR-1, Black/grey, #2233, stock. ZR-1 Net Reg Founding Member #316 & NCM member

10-18-2008	#12
HIZNHRZ Join Date: Apr 2004 Location: Germantown, MD Posts: 738	Re: LT5 Assembly Project Unless I become independently wealthy in the very near future, my plans for going deep inside of an LT5 are to watch you do it. With that said, I'd really appreciate the opportunity to watch and learn.

10-18-2008	#13
Chris_32212 Join Date: Sep 2008 Location: Vancouver Posts: 224	Re: LT5 Assembly Project i shall make a peagan sacrifice to please the LT5 gods so you may have good fortune during the project. good luck buddy Chris __________________ [SIZE=1]1993 Corvette ZR-1 #137, 1990 Yellow 6speed coupe, and 1991 6speed coupe.[/SIZE]

10-18-2008	#14
LGAFF Join Date: Mar 2007 Location: Crystal Lake, IL Posts: 7,194	Re: LT5 Assembly Project I am watching the LT5 training video right now, wondering WTF was I thinking. This should be fun, I am going to start with some pics tomorrow of what I have and some of the issues I am facing with regard to repairs, etc. I picked up a set of ported LT5 heads, and the matching block. The block ingested a screw, so there is some damage to a few pistons, I think I will only need 1 liner and 1 piston. The heads are another story, they have 1 crossed threaded IH bolt, and they are ported alittle too much where the IH meets the head, so there is some welding warranted to make sure the IH seals properly. LGAFF 92 ZR1 #234

10-18-2008	#15
WB9MCW Join Date: Dec 2003 Location: McHenry, Il. Posts: 6,607	Re: LT5 Assembly Project Soundz like a nice winter project. Maybe if you invite us we might swing by for a garage visit and some bench racing too boot. ??? __________________ http://i119.photobucket.com/albums/o...9mcw/SIG-2.jpg http://i119.photobucket.com/albums/o128/wb9mcw/vcm.gif "The Budget should be balanced, the Treasury should be refilled, public debt should be reduced, the arrogance of officialdom should be tempered and controlled, and the assistance to foreign lands should be curtailed, lest Rome will become bankrupt. People must again learn to work instead of living on public assistance." - Cicero, 55 BC " We the people are the rightful masters of both Congress and the courts, not to overthrow the Constitution but to overthrow the men who pervert the Constitution." - Abraham Lincoln

10-19-2008	#16
phrogs Join Date: Jul 2004 Location: Kalamazoo MI Posts: 1,753	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	#18
Pete Join Date: Dec 2003 Location: Chicagoland,IL Posts: 2,679	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	#19
lbszr Join Date: Nov 2006 Location: dayton,ohio Posts: 425	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. __________________ [FONT=Comic Sans MS][COLOR=red]"I wanna go fast!!"[/COLOR][/FONT] [FONT=Comic Sans MS][COLOR=#ff0000]-- Ricky Bobby[/COLOR][/FONT] Last edited by lbszr; 10-19-2008 at 03:13 AM.