Timing chain damper bolt size?
Thread Starter
TECH Resident
Joined: Jun 2013
Posts: 814
Likes: 231
From: Nebraska, The Good Life
Timing chain damper bolt size? Does anyone know what the bolt size is for the bolts that hold the timing chain damper block to the front of the engine block on an LS2? Better yet, does anyone have a pair of those bolts they don't need and would be will to send my way?
Last edited by Rich-L79; May 24, 2024 at 08:54 AM.
Those bolts are the same bolts as the front cover bolts basically. I buy ARP bolts in bulk, and use the same bolt for the front and rear covers, valley plate, oil pan (minus the two rear long ones), the block-style chain damper as your using, etc. I’m fairly sure I use the same bolt for the cam sprocket also…
M8 x 1.25 x 30 or a 34? I can’t remember what I ordered in length…
M8 x 1.25 x 30 or a 34? I can’t remember what I ordered in length…
Thread Starter
TECH Resident
Joined: Jun 2013
Posts: 814
Likes: 231
From: Nebraska, The Good Life
TECH Addict
Joined: Dec 2017
Posts: 2,191
Likes: 977
Right: the factory bolts are the same as the later style front cover bolts. Not that ones like the earlier ones "won't work" or can't be used; just, the factory used the later ones. They're 8mm std thread (not fine) whatever that is, about 40mm long. The block is a good 20mm thick right there so the length isn't super critical.
Thread Starter
TECH Resident
Joined: Jun 2013
Posts: 814
Likes: 231
From: Nebraska, The Good Life
Well, if it matters this will be going onto an LS1 block. The later blocks have the holes drilled and tapped but they just didn't put the damper in. Am told the LS2 damper is a drop in fit as long as the block is already drilled and tapped which this one should be as it was built in Feb. 2004, right towards the end of the LS1 run.
But I can pull one of those bolts off my LS2 and go shopping for a similar size bolt so I have them ahead of time for the LS1 build.
But I can pull one of those bolts off my LS2 and go shopping for a similar size bolt so I have them ahead of time for the LS1 build.
Trending Topics
TECH Addict
Joined: Dec 2017
Posts: 2,191
Likes: 977
Doesn't matter if the holes are there or not. It's extremely eeeeeezzzzy to drill & tap it. No great precision is required. I put one on my LQ9 block that didn't have the holes, if I can do it and not screw it up, it's GOT TO BE eeeeeeeeeeeeezzzzy. 
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
