LS2 Timing Chain Dampener Modified & Installed on LS1 Block
01-14-2009, 01:32 PM
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LS2 Timing Chain Dampener Modified & Installed on LS1 Block A broken LS2 timing chain on my LS1 mild head/cam engine prompted me to install a timing chain dampener. I also put in a Katech C5-R timing chain manufactured by JWIS.
As many know the "beige" LS1 dampeners with ~2.1" bolt hole centers are no longer available. The "black" LS2 dampeners with ~1.7" centers are available. Problem is the bolt hole centers on the "black" dampeners don't match the bosses on the LS1 block.
The solution we came up with was to modify a "black" dampener. We milled out a little of the inner webbing on a "black" dampener and fabricated two 0.125" aluminum inserts and bushings. Measured proper bolt hole spacing and drilled the inserts.
Also had to drill and tap my block to install. Some early LS1 blocks came from the factory drilled. Mine did not.
Probably would have been easier to buy a chunk of nylon and trace out a pattern using a "black" dampener, however, we were unsure of the type of nylon to use which would stand up to the application....
Photos are provided below. I don't have a photo of an unmodified "black" dampener but a link to one is provided.
On a closing note, damage to my engine was limited to the heads. Had to replace all valves and have them milled. Lot of labor and money....
http://www.crateenginedepot.com/stor...P2276C119.aspx
Rick
As many know the "beige" LS1 dampeners with ~2.1" bolt hole centers are no longer available. The "black" LS2 dampeners with ~1.7" centers are available. Problem is the bolt hole centers on the "black" dampeners don't match the bosses on the LS1 block.
The solution we came up with was to modify a "black" dampener. We milled out a little of the inner webbing on a "black" dampener and fabricated two 0.125" aluminum inserts and bushings. Measured proper bolt hole spacing and drilled the inserts.
Also had to drill and tap my block to install. Some early LS1 blocks came from the factory drilled. Mine did not.
Probably would have been easier to buy a chunk of nylon and trace out a pattern using a "black" dampener, however, we were unsure of the type of nylon to use which would stand up to the application....
Photos are provided below. I don't have a photo of an unmodified "black" dampener but a link to one is provided.
On a closing note, damage to my engine was limited to the heads. Had to replace all valves and have them milled. Lot of labor and money....
http://www.crateenginedepot.com/stor...P2276C119.aspx
Rick
01-14-2009, 10:30 PM
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The link is WRONG. Block has raised bosses which get drilled for the bolts. No way to drill for the 1.7" holes of the LS2 dampener and get it to mount flush. Thickness of block off the bosses is also an issue.
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01-06-2012, 11:12 PM
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02-16-2012, 06:00 PM
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A broken LS2 timing chain on my LS1 mild head/cam engine prompted me to install a timing chain dampener. I also put in a Katech C5-R timing chain manufactured by JWIS.
Also had to drill and tap my block to install. Some early LS1 blocks came from the factory drilled. Mine did not.
Also had to drill and tap my block to install. Some early LS1 blocks came from the factory drilled. Mine did not.
02-17-2012, 06:17 PM
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My 02 LS6 block has the bosses tapped from the factory. I ordered a GM dampener from Katech. They have some of the factory dampeners still in stock. Your dampener style looks great and im sure I will have to do the same on my next build. Keep us posted on how it works out.
