romancommander

iTrader: (1)

So I went to throw the oil pan on my 4.8 yesterday and noticed that the block is missing an oil pan hole. It was never drilled or tapped, and my new aftermarket pan has a hole there. It seems like it should be there. Was it just a flaw? Is it supposed to be there?

Left side of the pics second pan hole down from the filter.






Thanks

Rob WS6

iTrader: (16)

Theres definitely supposed to be a tapped hole there... never saw anything like that before!

kelsey_canard

iTrader: (6)

Lol thats acctually pretty awesome. I bet somebody would pay for that block! auction it off. Sounds like a mess I would get into.

romancommander

iTrader: (1)

The stock 4.8 pan doesn't have that hole either, yet the gasket on the pan does. Weird.

Paul Bell

iTrader: (9)

This is pretty common. My 1999 LS1 block was also missing it.

Carefully drill & tap it for the correct thread. Make sure you get it square.

https://ls1tech.com/forums/pontiac-f...l#post18250492

romancommander

iTrader: (1)

Drilled and tapped it. Man the cast iron is easy to drill and tap.

Tranz Zam

I've ran into that before. I never bothered to drill and tap it.

Its weird how GM decided to not drill out one bolt.