1958 oil pan

[Justin B.]

Can anyone tell me if the 58' high performance (290 h.p.) oil pan has the flapper door in it?

[Joe L.]

Re: 1958 oil pan

Justin------

Yes, I believe that it did.

[Loren L.]

I don't think so - I believe the first

"trapdoor" appeared in the 60-1 HP engines - 58 was just a regular 3 step pan.

[Dennis C.]

Tend to agree w/Loren...

At least my 58 290 HP had no swinging oil door.

[Joe L.]

Re: Tend to agree w/Loren...

Dennis, Loren and Justin-----

I could very well be in error here. I thought that the GM #3736615 oil pan used for all 1958 Corvettes had the "trap door" baffle. However, the latter feature may not have come along until the GM #3769761, which was first used for 1960 with mechanical lifters.

I think that this may summarize the situation with these C1 oil pans:

GM #3736115---used for all 1957-61 Corvettes EXCEPT 60-61 with SHP---no trap door

GM #3769761---used for 1960-61 with SHP---has trap door

GM #3789629----used for all 1962 and all 1957-61 SERVICE---has trap door

GM #359937----SERVICE replacement for 3789629; has trap door and uses the 75+ style 0.41" thick front oil pan gasket instead of the 0.22" thick used for all of the above pans

I believe that all of the above oil pans are externally virtually identical except for spot welds and, possibly, other minor nuances.