Anyone know of any diagrams and/or a complete list of parts associated with an LS1? I searched through LS1Tech and found some diagrams but they dont show everything. I mainly want to find out what the big threaded hole is for on the drivers side of the engine. It's a fair sized hole, I'd say 1 3/8" in diameter with threads. Looks like a block heater would go there, but I am unsure as I cannot find anything about block heaters on LS1Tech. Can I use a plug to screw into it maybe? Rubber expansion plug maybe? I will try and get a pic tomorrow if nobody knows what I am talking about.

 

This one?

 

Nope, it's on the drivers side front (behind where the alternator would be).

 

??? I dont recall seeing a threaded hole that big in the block...got a pic?

 

If it's an LS1 , it won't be a block heater. Now if it's an iron truck block, it very well could be. My 6.0 had a block heater on it and it was on the driver side. Get a picture so we know what we're looking at.

 

Here is a picture of it:



Also, whats the thing above the oil filter used for (in Pocket's / Jon's picture)?

The one in your picture Jon is non-existent on my block. Mine is from a '99 Z28. And it is an LS1, aluminum 5.7.

 

My 98 aluminum LS1 has one near the front like in your pic

Same thing as above, just moved. I took a pic of my 5.3 because it was easier to see

 

Hmmm, odd. I don't recall seeing it on my engine - but maybe I've just overlooked it, or they might have phased it out by '08...

 

Have you come across this parts list from LS1tech.com?