Correct Oil Pan Drain Plug Location on a 73 L48?

[Jimmy P.]

My L48 oil pan drain plug is located in the rear center. I don't think my pan was replaced. However, the 73-74 JM says the drain plug is located on the driver's side on the L48 and L82 cars, and the plug is located in the rear on the LS4. Is the manual in error or is my pan not correct?

[Russ S.]

Re: Correct Oil Pan Drain Plug Location on a 73 L48?

The manual is incorrect. Plug should be center rear.

[Jimmy P.]

Re: Correct Oil Pan Drain Plug Location on a 73 L48?

Thank you Russ.
is it also in the center for the L82?

[Russ S.]

Re: Correct Oil Pan Drain Plug Location on a 73 L48?

Yes Jimmy. It is.

Thank you Russ.
is it also in the center for the L82?

[Joe L.]

Re: Correct Oil Pan Drain Plug Location on a 73 L48?

Thank you Russ.
is it also in the center for the L82?

Jimmy------


Center rear for ALL 1963-74 Corvette small blocks---every single one ever built.

[Jimmy P.]

Re: Correct Oil Pan Drain Plug Location on a 73 L48?

Thank you Joe,
So the JM has these reversed?
Then all LS4's drain plugs should all be on the driver's side of the pan?

[Russ S.]

Re: Correct Oil Pan Drain Plug Location on a 73 L48?

Jimmy, My 74 LS4 is center rear also.

Thank you Joe,
So the JM has these reversed?
Then all LS4's drain plugs should all be on the driver's side of the pan?

[Jimmy P.]

Re: Correct Oil Pan Drain Plug Location on a 73 L48?

Thanks again Russ and Joe for clarifying this for me and for sharing your wealth of knowledge. Made notes of these corrections (along with the BB & SB dip stick clarifications from another post) in my judging manual. Hope it won't be an issue in the spring when I plan to have the car judged at our chapter meet.

[Joe L.]

Re: Correct Oil Pan Drain Plug Location on a 73 L48?

Thank you Joe,
So the JM has these reversed?
Then all LS4's drain plugs should all be on the driver's side of the pan?

Jimmie-------


No Corvette big block ever used an oil pan with a side drain. None. Other Chevrolet models with big block did, though.

[Russ S.]

Re: Correct Oil Pan Drain Plug Location on a 73 L48?

The 73-74 judging guide is very old so it will most likely be an issue at a chapter meet along with other items.

Thanks again Russ and Joe for clarifying this for me and for sharing your wealth of knowledge. Made notes of these corrections (along with the BB & SB dip stick clarifications from another post) in my judging manual. Hope it won't be an issue in the spring when I plan to have the car judged at our chapter meet.

[Mark E.]

Re: Correct Oil Pan Drain Plug Location on a 73 L48?

So it sounds like we're saying all '63-74 Corvettes, small block and big block, had rear facing oil drain plugs.

[Joe L.]

Re: Correct Oil Pan Drain Plug Location on a 73 L48?

So it sounds like we're saying all '63-74 Corvettes, small block and big block, had rear facing oil drain plugs.

Mark-------


Yup, that's how it is.

From 1963-96 only the following used a side oil drain:

1) All 1975-79

2 1990-95 ZR1