My engine build thread

duratothemax

<--- slippery roads
Aug 28, 2006
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Wyoming
how come the flywheel is on it? AFAIK the duramax is an internally balanced engine.

Looks good Josh, good luck and keep us updated!!
 

duratothemax

<--- slippery roads
Aug 28, 2006
7,139
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Wyoming
hmmm they balanced mine without the flywheel and it runs smooth as glass at all rpm ranges? Oops...? :eek:
 
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JoshH

Daggum farm truck
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Feb 14, 2007
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I was told it was externally balanced, so I gave the guy all my stuff. I figure he knows what he's doing so he can get it balanced regardless. I was talking to him last weekend, and he said he got all the rods balanced to within 1/10th of a gram so it should be pretty smooth.

I'm getting pretty anxious to have it back up and running. :driving:
 

malibu795

misspeelleerr
Apr 28, 2007
8,110
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in the buckeye state
look like he pull lot of wieght out of the counter weights :cool2:

should rev pretty fast now :D

the shop i talked too said OEM spec is +/- 15 grams on most V-8 applications
 

ripmf666

Active member
Sep 20, 2006
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when they balanced mine they just needed the weights of the dampener and the all 8 bolts and the flex plate.Adam they drilled the heck out of mine and it does rev faster.
 

paint94979

Beer Nazi
Sep 18, 2006
11,715
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when they balanced mine they just needed the weights of the dampener and the all 8 bolts and the flex plate.Adam they drilled the heck out of mine and it does rev faster.

sorry to go OT but henry when are we gonna see a video and new 1/4 times of your truck?

Looks awsome Josh keep us up to date.
 

ripmf666

Active member
Sep 20, 2006
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Wentzville Mo
sorry to go OT but henry when are we gonna see a video and new 1/4 times of your truck?

Looks awsome Josh keep us up to date.


Was going to be tonight but were here starting a build on a 02 LB7.I can go out and do a nice big smokin burnout lol for you in front of the house.
 

Trippin

SoCal Diesel
Aug 10, 2006
663
2
0
The Duramax is externally balanced, which means there is counter weights added to the flywheel and/or the damper. In this case both.

According to the GM print for the crank, the out of balance allowance is 25g/cm
 

sweetdiesel

That's better
Aug 6, 2006
10,390
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Thailand
I was told it was externally balanced, so I gave the guy all my stuff. I figure he knows what he's doing so he can get it balanced regardless. I was talking to him last weekend, and he said he got all the rods balanced to within 1/10th of a gram so it should be pretty smooth.

I'm getting pretty anxious to have it back up and running. :driving:


When mine was balanced they used the flywheel and old bolts
I kinda wish I got a better flexplate and Dampner before they balanced everything
 

JoshH

Daggum farm truck
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Feb 14, 2007
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When mine was balanced they used the flywheel and old bolts
I kinda wish I got a better flexplate and Dampner before they balanced everything
I just got my new SoCal FluidDampr that I forgot I ordered :eek: so my buddy is going to have to rebalance everything. Oh well, I guess I get to make him earn his money :D
 

sweetdiesel

That's better
Aug 6, 2006
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Simon, if i want to run a dampner i should get one to Ted before he rebuilds my motor?

Yup, Call Trippen ASAP

IIRC there is a way to do it after the fact,but would be better now

Josh, thanks for all the pics and best of luck with your build
 

JoshH

Daggum farm truck
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Feb 14, 2007
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Well, another update. I got everything back from the machine shop last weekend and started putting it together. I've been working on it a few hours each evening after work. It's going slow but steady. I have the crank, rods, pistons, and cam in. I'm going to try to get the heads put on it tonight. So far it seems pretty straight forward.

I owe Henry a BIG thanks for posting all the torque specs and sequences for everything and for posting all the pictures of his build. I've been referencing both quite a bit. :thankyou: :yourock:
 

blksmok

New member
Apr 28, 2008
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Josh,
I had no idea your engine blew. Sorry to hear that man. :( I'll watch this thread for updates. Good luck on the build up.