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1999-2000 6.0L Lq4 questions, just bought one, iron heads

Old Apr 12, 2009 | 09:22 PM
  #21  
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Gotcha, misread that. I don't recall us using any loctite on my flexplate bolts. Just torqued them down in the star pattern, 3 step torquing pattern. No problems yet lol.
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Old Apr 12, 2009 | 09:25 PM
  #22  
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Yeah sometimes you get lucky. I forgot to use red thread locker on my cam bolts and retainer bolts. Didnt use a torque wrench either but so far so good, i'll be taking it back apart to re-do it though here shortly before something does loosen up.

I dont think you'll be as likely tohave them back out with an auto, you have far less vibrations and the locating pins really do hold alot.
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Old Apr 12, 2009 | 09:36 PM
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Originally Posted by Shawn MacAnanny
No the LS1 4l60e is too long. The LT1 4l60e is shorter so is the 700r4, the TH350, the TH400. These transmissions require spacers with the standard short crank LS1. I know because i was going to run a TH400 behind my 68s Ls1. The 99-00 6.0Ls used the SBC/BBC crank length to use the 4l80e which is based on a TH400 platform. Rather than using a spacer they just machined the crank longer. The 700r4, TH350, TH400, LT1 4l60E should ALL fit from everything i know. I am questioning if an LT1 t56 will fit.
Oh OK, I misunderstood...well from the info you provided it seems as though it should fit, just don't know of anyone around here who has done it though. Did learn something new today though...
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Old Apr 12, 2009 | 09:38 PM
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Originally Posted by Shawn MacAnanny
Yeah sometimes you get lucky. I forgot to use red thread locker on my cam bolts and retainer bolts. Didnt use a torque wrench either but so far so good, i'll be taking it back apart to re-do it though here shortly before something does loosen up.

I dont think you'll be as likely tohave them back out with an auto, you have far less vibrations and the locating pins really do hold alot.
My cam and retainer bolts have been chugging along for 23K w/o loc-tite or the use of a torque wrench either FWIW
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Old Apr 12, 2009 | 09:50 PM
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Originally Posted by budhayes3
My cam and retainer bolts have been chugging along for 23K w/o the use of a torque wrench either FWIW
shame on you
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Old Apr 13, 2009 | 04:56 AM
  #26  
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I'll let you guys know how it works out. It'll be a litlte while until i start doing bolting things together though. I'm gonna get the enigne running and come a compression/leak down etc.

Who here thinks its safe to start an engine on a regular engine stand? Like the one you bolt to the bell housing bolts? I think it'll be fine as long as i dont rev the **** out of it.
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Old Apr 13, 2009 | 08:56 AM
  #27  
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Default Crankshaft measurements

Here is a cut and paste of 1 of my posts from the PPE forum.

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this is a list that shows the differences in flywheel flange thicknessess.

Crankshaft Replacement Caution For
1998-2005 GM 4.3, 4.8, 5.3, 5.7 & 6.0L Engines

The AERA Technical Committee offers the following information on crankshaft replacement caution for 1998-2003 GM 4.3, 4.8, 5.3, 5.7 and 6.0L engines. Design changes in the flywheel flange thickness have been made to some crankshafts used in the above-mentioned engines. This bulletin is being re-published with additional information.

The later crankshafts are shorter on the flywheel flange as seen in the listing below. These changes are due to the many different vehicle / transmission combinations being built by GM.

A flywheel spacer ring GM Part #12563532 and a longer bolt set GM Part #12563533 is required when using a thin flange crankshaft to replace a thick flange crankshaft. Also, if the crankshaft is being used in a vehicle, which is a standard shift application, you also need pilot bushing GM Part #12557583 or 12479894.

Note: GM part numbers correct as of 12-18-04.

Years Liters Casting # Trans Flange Thickness

1998 early 4.3L 236, 255 V-6 1.62 thick flange
1998+up 4.3L 236, 255 V-6 1.500 thick flange
1999-2000 4.8L 312 V-8 M/T 1.250 thick flange
1999-2000 6.0L 215 V-8 1.250 thick flange
1999-2005 4.8L 482 V-8 A/T .857 thick flange
2001-2005 4.8L 482 V-8 M/T .857 thick flange
1999-2005 5.3L 216 V-8 A/T .857 thick flange
1997-2005 5.7L 216 V-8 .857 thick flange
2001-2005 6.0L 216 V-8 .857 thick flange

All GEN III crankshafts used in Camaro, Corvette and Firebird have a .857 thick flange and also have a freeze plug installed at the bottom of the pilot shaft hole. The 4.8, 5.3 + 6.0L don?t have the freeze plug. The drilled hole thru the centerline of the 5.7L LS1 & LS6 crankshafts allows a path to balance crankcase pressure within the lower crankcase. Doing so has eliminated possible oil consumption when the engine is operated over 4800 RPM.

Caution: Early crankshafts use a flat reluctor wheel and late have a recess. Recess will work on all years. Do not use a flat reluctor on late applications as it will cause an engine misfire.

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Here is some info on the parts needed to install different transmissions behind different engines. Some links wont work.
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Installing GEn 3/4 engines behind non GEn 3/4 trans&vice
If you want to install a GEn 3/4 engine in a 96-99 truck you can use the existing 4l60e by using this flexplate spacer
http://www.crateenginedepot.com/stor...2-P1343C0.aspx

and 6 of these longer bolts
http://www.crateenginedepot.com/stor...3-P1344C0.aspx

EDIT With this flexplate from a GEn 3/4 truck that used a 4l80e trans
http://www.crateenginedepot.com/stor...7-P1342C0.aspx


if you want to keep your 305 or 350 but have a more modern 4l60e/65e/70e that was behind a 4.8,5.3,6.0 or 6.2L engine then you need this kit.
http://www.crateenginedepot.com/stor...-P1812C43.aspx


This flexplate adapter from HUGHES will allow you to use an older 4l60e behind a GEN 3/4 engine as well.
http://www.exoticperformanceplus.com...html?item=1091
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Hope this helps some.

peace
Hog
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Old Apr 13, 2009 | 08:25 PM
  #28  
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Originally Posted by GMCtrk
shame on you
I turn the rachet clockwise until my right wrist goes "click" lol I torque head bolts, rod bolts, mains, transmission valve body bolts, etc, but I'm pretty confident about most others
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Old Apr 13, 2009 | 09:01 PM
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Great info hog! I didnt know about the reluctor wheel issue though, i was hoping to test fire this engine on the stand with my MSD 6010 box and i know they are picky about reluctor wheels.
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