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LS2 Timing Chain Dampner

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Old Mar 1, 2006 | 11:23 AM
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Default LS2 Timing Chain Dampner
Does the LS2 block have a different timing chain dampner than the ls1/ls6? If so, does anyone have the part #? I have heard that it is much cheaper than the ls1/ls6 dampner. Can anyone confirm this?
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Old Mar 1, 2006 | 03:26 PM
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Found the part number. 12588670 LS2 Timing Chain Dampner
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Old Mar 1, 2006 | 05:16 PM
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Originally Posted by Z06kern
Does the LS2 block have a different timing chain dampner than the ls1/ls6? If so, does anyone have the part #? I have heard that it is much cheaper than the ls1/ls6 dampner. Can anyone confirm this?
Old below the LS2 is different and relatively free

From GM Parts Direct:
GM PART # 88958607

CATEGORY: Belt or Chain, Engine Timing

DESCRIPTION: DAMPENER

GM LIST: $117.30

OUR PRICE: $82.11
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Old Mar 2, 2006 | 01:17 PM
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Originally Posted by Z06kern
Does the LS2 block have a different timing chain dampner than the ls1/ls6? If so, does anyone have the part #? I have heard that it is much cheaper than the ls1/ls6 dampner. Can anyone confirm this?
All of the LS engines from 2004 & up use the same timing chain dampner. It is part# 12588670 and we sell it for $9.95.

Brian
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Old Mar 2, 2006 | 07:35 PM
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Will someone please measure and post bolt centerlines on part 12588670.
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Old Mar 4, 2006 | 08:31 PM
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Originally Posted by JC5
Will someone please measure and post bolt centerlines on part 12588670.
I'd like to know if the LS1 block can be drilled and tapped to accept the LS2 damper. I believe the block casting on the LS2 is "slightly" different from the LS1. Anyone have a template to properly locate the LS2 damper?
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Old Mar 9, 2006 | 12:42 PM
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Originally Posted by Hodge
I'd like to know if the LS1 block can be drilled and tapped to accept the LS2 damper. I believe the block casting on the LS2 is "slightly" different from the LS1. Anyone have a template to properly locate the LS2 damper?
Found this in a google search:

Originally Posted by Kurt
Yes. 12588670 = narrow black 1.762
88958607 = tan (older) 2.187

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Old Mar 9, 2006 | 01:29 PM
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I have a 05 Aluminum LS2 block 418cid.with the timming chain damper, the part no. i used is #(12588670) and fit perfect.
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Old Mar 10, 2006 | 07:40 AM
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From: Fort Smith, AR
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Checked my 2000 LS1 block last night. The LS2 timing chain damper WILL NOT work. The LS2 must have a revised casting to accept the narrow 1.762” bolt pattern damper. My LS1 block WILL accept the 2.187” damper IF I drill and tap the block.
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Old Mar 10, 2006 | 07:47 AM
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Originally Posted by Hodge
Checked my 2000 LS1 block last night. The LS2 timing chain damper WILL NOT work. The LS2 must have a revised casting to accept the narrow 1.762” bolt pattern damper. My LS1 block WILL accept the 2.187” damper IF I drill and tap the block.
I drilled and installed the early damp on my 2000. They give you template.
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Old Mar 10, 2006 | 10:06 AM
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Yeah, I knew they give you a template. I've thought about installing the damper but decided not to.
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Old Mar 11, 2006 | 02:27 PM
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So if I get an LS2 timing set from TSP for my 98 I will need a new damper? Hodge what do you mean you decided not to? you just went without?
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Old Mar 11, 2006 | 07:26 PM
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Originally Posted by SMonty
So if I get an LS2 timing set from TSP for my 98 I will need a new damper? Hodge what do you mean you decided not to? you just went without?
My car did not have one to begin with and I'm not paying $100 for the damper to fit my block. The timing chain has nothing to do with it. If you are still running your OEM '98 block, you'll need the earlier damper too... if you want to run one.

I figure I'll build a stroker motor BEFORE my new timing chain stretches.
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Old Mar 11, 2006 | 10:07 PM
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Why is LS1 dampener #88958607 so expensive (~$100) vs the LS2 piece (#12588670) which is only ~$10?
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Old Mar 12, 2006 | 09:50 AM
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Originally Posted by ShaunSG
Why is LS1 dampener #88958607 so expensive (~$100) vs the LS2 piece (#12588670) which is only ~$10?
My guess...

GM designed the LS1 for the damper but decided (at the last minute) not to use it. The tooling for the damper existed, so to pay for the tooling the part piece price is high.

My understanding is the LS2 uses the factory damper. Since thousands of LS2's have this, the part piece price is MUCH lower.
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Old Mar 14, 2006 | 01:39 PM
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Does anyone know which one will fit an alum 5.3L block?
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Old Mar 14, 2006 | 03:03 PM
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Originally Posted by Greg Fell
Does anyone know which one will fit an alum 5.3L block?
What year is the casting?
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Old Mar 14, 2006 | 03:18 PM
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Not sure....I'd guess an 04. Its the first year the 5.3 was offered as an aluminum version.
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Old Mar 14, 2006 | 03:32 PM
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Originally Posted by Greg Fell
Not sure....I'd guess an 04. Its the first year the 5.3 was offered as an aluminum version.
Should be an 05 Greg. I have the 5.3 aluminum in my truck.
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Old Mar 15, 2006 | 10:07 AM
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Originally Posted by Greg Fell
Not sure....I'd guess an 04. Its the first year the 5.3 was offered as an aluminum version.
I cannot say. Someone with more experience will have to tell you.
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