beast69camaro

iTrader: (14)

Does anyone know any part numbers for the LT1 front oil galley plugs?

I bought a freeze plug kit for a gen1 SBC from the local autozone and the included plugs were not the proper size. I read across a fellow's post on this forum who had the same issue and had to order an LT1-specific kit from GM, but I can't find that post anymore.

On the old plugs which were removed, two lifter galley plugs are ~0.57" OD with small holes drilled in them and the main feed galley is ~0.47" OD with no hole. Naturally, the local GM dealership parts counter is not open on weekends when I have time to work on my car.

blackz93

iTrader: (2)

Pretty sure mine were 1/2" for the two with holes in them.

wrd1972

iTrader: (12)

I had threaded plugs installed in mine. They were then drilled ~.030" just like OE spec.

gsdave

Same here. Although finding someone to drill them was difficult.

beast69camaro

iTrader: (14)

Threaded plugs are all fine and dandy, but that doesn't answer my question.

Took an hour out of my work day to hit the local dealership and got the info myself:

-The two big lifter galley plugs (with .025" holes in them) are definitely ~9/16" and are GM part# 10110897

-The single small plug for the main oil galley (no hole) is GM part# 14091563

RallyBoy

iTrader: (1)

Not to hijack, but are the holes necessary? I have screw in galley plugs with no holes drilled in them.

beast69camaro

iTrader: (14)

I have read they aren't absolutely necessary, but they do provide a little extra lubrication to the cam sprocket thrust surface and timing chain which gives me a little peace of mind. And I don't imagine GM put them there from the factory for no reason.

blackz93

iTrader: (2)

More oil on the water pump gear is what I was told.