63 L84 oil pan

[Todd L.]

Hey guys,

The NCRS technical information manual and judging guide (6th edition) states that the L76 and L84 oil pan is six quarts with two dimpled depressions on each side. Everything I have seen out there with the 6 qt, 13-1/2" long sump has three dimples on the drivers side, and two on the passenger side, similar to the 10-1/2" long sump L75 pan. Am I missing something here? I believe the GM part # was 359942. I would appreciate the help with this.

Todd

[Joe L.]

Re: 63 L84 oil pan

Hey guys,

The NCRS technical information manual and judging guide (6th edition) states that the L76 and L84 oil pan is six quarts with two dimpled depressions on each side. Everything I have seen out there with the 6 qt, 13-1/2" long sump has three dimples on the drivers side, and two on the passenger side, similar to the 10-1/2" long sump L75 pan. Am I missing something here? I believe the GM part # was 359942. I would appreciate the help with this.

Todd

Todd------

The 1963 L-76 and L-84 oil pan was part of a 6 quart system. The pan had 3 vertical depressions on the left side and 2 on the right side.

The original part number of the pan was GM #3820001. The 359942 is a 1975 replacement for the original. It is identical except that the front gasket radius is 2-3/8" instead of 2-1/4" for the 3820000. A 1975-79 gasket set must be used with the 359942 oil pan.

[Todd L.]

Re: 63 L84 oil pan

Thanks Joe,

So are you saying the judging manual is incorrect, since it states only two dimples on each side?

[Michael J.]

Re: 63 L84 oil pan

I hear rumors the manual will soon be updated.......

[Joe L.]

Re: 63 L84 oil pan

Thanks Joe,

So are you saying the judging manual is incorrect, since it states only two dimples on each side?

Todd------


If that's what it says and if we're talking about the same features described as "dimples", then I'd say it's incorrect. I've not seen a pan with 2 "dimples" on each side but I've certainly not seen everyone ever made.

[Michael J.]

Re: 63 L84 oil pan

Well, I have 1 '63 and 3 '64 L84s, I just went to look and all of them have oil pans with 2 of the long depressions or dimples on each side of the pan. So they must exist as the TIM&JG states, all have been through NCRS judging on multiple levels as well and no deductions for the oil pans.

[Joe L.]

Re: 63 L84 oil pan

Well, I have 1 '63 and 3 '64 L84s, I just went to look and all of them have oil pans with 2 of the long depressions or dimples on each side of the pan. So they must exist as the TIM&JG states, all have been through NCRS judging on multiple levels as well and no deductions for the oil pans.

Michael------


I think there must have been a change in the configuration of the GM #3820001 which added the left side "dimple" sometime during the years of its manufacture (1963-1974).

I have a known-original, 1969 GM #3820000, the 5 quart pain, and it has 3 "dimples" on the left side and 2 on the right. I now wonder if early versions of the 3820000 had only 2 "dimples" on each side?

[Michael J.]

Re: 63 L84 oil pan

Michael------


I think there must have been a change in the configuration of the GM #3820001 which added the left side "dimple" sometime during the years of its manufacture (1963-1974).

I have a known-original, 1969 GM #3820000, the 5 quart pain, and it has 3 "dimples" on the left side and 2 on the right. I now wonder if early versions of the 3820000 had only 2 "dimples" on each side?

I think that is correct Joe, I remember when one of my '64s was being restored and the engine guy said he had to look long and hard to find the original '64 L84 oil pan.

[Joe L.]

Re: 63 L84 oil pan

I think that is correct Joe, I remember when one of my '64s was being restored and the engine guy said he had to look long and hard to find the original '64 L84 oil pan.

Michael-----


After 1964 the "6 quart" pan was used only for 1965 L-76,and L-84, MAYBE some 1965 L-79, all without power steering, of course. Then, it was not used again until it was used for early 1970 LT-1 and 1970-72 ZR-1. It was never used again after 1972.

Does anyone have a car with one of the above that they are reasonably sure it has its original oil pan? Maybe we can determine about when the change occurred.

Also, does anyone have a 1963-64 with the "5 quart" pan that they are reasonably sure has its original oil pan? I'm very interested to know what number of "dimples" (actually, impressed vertical ribs) they have.

[Harry S.]

Re: 63 L84 oil pan

Here ya go. 2.25 Inch opening. This pan has the nut welded on the inside. I know the one on my April 63 has the nut plate welded inside, but I can't get to car to look. It's in storage for the winter.

IMG_1972.JPG

IMG_1966.JPG

IMG_1967.JPG

IMG_1968.JPG

IMG_1969.JPG

[Joe L.]

Re: 63 L84 oil pan

Here ya go. 2.25 Inch opening. This pan has the nut welded on the inside. I know the one on my April 63 has the nut plate welded inside, but I can't get to car to look. It's in storage for the winter.

[ATTACH=CONFIG]103477[/ATTACH]

[ATTACH=CONFIG]103478[/ATTACH]

[ATTACH=CONFIG]103479[/ATTACH]

[ATTACH=CONFIG]103480[/ATTACH]

[ATTACH=CONFIG]103481[/ATTACH]

Harry------


Do you know what year Corvette this pan came off of?

[Harry S.]

Re: 63 L84 oil pan

Harry------


Do you know what year Corvette this pan came off of?

Nope, but I'm sure it's not a 63. If I can get to my April 63 I'll let you know what is there. I do believe it's a 3820000.

[Harry S.]

Re: 63 L84 oil pan

Picture of right side just after paint. I'll look for the left side. This is the April 63 with the nut plate welded in the pan. Making it an early pan.

Engine Right.JPG

[Dick C.]

Re: 63 L84 oil pan

1965 L79 42000 miles (204XX)
IMG_1799.jpgIMG_1798.jpgIMG_1800.jpg

[Joe L.]

Re: 63 L84 oil pan

1965 L79 42000 miles (204XX)
[ATTACH=CONFIG]103487[/ATTACH][ATTACH=CONFIG]103488[/ATTACH][ATTACH=CONFIG]103489[/ATTACH]

Dick------


Good! So, the "5 quart" pan had the 3 left side "dimples" at least as far back as 1965.