I started reassembling my 1998 LS1 and noticed a hole in the front of the the Block above the timing crank gear. Can someone tell me if I need a plug for this hole? I don't remember it being open. The machine shop may have removed it. If I do need a plug for it does someone have a part number.

 

Hi, this hole is for block breathing, leave it open.

Please install the Black Cam Chain Dampener and post that picture.

Lance

 

i have a 1998 so the black timing chain dampener doesn't fit without drilling and tapping. I ordered one from BTR that's a direct bolt on. I'll post pics when installed. I'm waiting on some parts now.

 

the red one looks nice

 

Looks like the one I ordered.

 

Melting chain and sprockets. Arp bolts and RDE timing chain dampener.

 

LOL "Melting chain and sprockets"
I know, you mean Melling.... uhh... you do, right??

 

Damm spell check. Let's hope they never melt.

 

Yeah if that should happen there are OTHER things to check into...... lol

 

Hi Troy, this IS the type of QUALITY "tech" that will put LS-1 Tech at the top.

GOOD WORK !

Now to add, this hole in EARLY AL blocks is a WEAK area allowing cracking.

My guess is that the GM engineering was OK for a 400HP engine NOT GREATER.

The cracks I have seen are between the shown hole AND the Main Saddle.

Lance