2004SSS

iTrader: (25)

is this on your lsx? i had a similar problem , the rear cover uses a small o ring and im not sure where mine was coming from but i know it was engine oil from the same area , never did find it hopefully it wont be there this go but imo it was something with the rear cover on the lsx block.

DrX

iTrader: (7)

Yes, this is my LSX block.

Here's a better shot of the seal lip which is mostly dry.



The bellhousing is dry and unstained on the outside, but this looks like/feels like Dexcool:

907TBSS

We sure it's not just a block porosity issue? I mean it is all aluminium and I know there has been a TSB out on other LS blocks for this.

DrX

iTrader: (7)

LSX block is iron.

The plug was in tight with lots of what appears to be teflon paste sealant. Didn't see any coolant oozing out until I got it about 3/4 of the way out?? No o-ring or aluminum washer on these plugs.

2004SSS

iTrader: (25)

headgasket pushing water possibly? really need to determine the type of fluid it is before any further diagnosis can be performed , taste it imo

DrX

iTrader: (7)

It was definitely fresh Dexcool on that plug. When I loosened the plug enough it started to dribble out along the same path as the reddish stains seen in the first photos I posted. Doesn't appear that anything was leaking from above the bellhousing.

2004SSS

iTrader: (25)

check for hydrocarbon , or pressure check the system , should find the source of the dribble

budhayes3

iTrader: (19)

So you're thinking that the plug is the leak? Should be an easy fix...

DrX

iTrader: (7)

Looks that way. Not sure why it would leak though as it was tight and had plenty of teflon goop on it.

budhayes3

iTrader: (19)

Could be some debris or oil/fluid on the threads not allowing the teflon goop to do it's job