'66 sb oil pan depth

[Peter T.]

Re: '66 sb oil pan depth

Larry,
I changed my plan and used a chemical stripper to do it myself. Followed by a hand sanding and a gumout spraying. I will do several high pressure water cleanings before I do the painting and installation.
Pete

[Joe L.]

Re: '66 sb oil pan depth

Larry,
I changed my plan and used a chemical stripper to do it myself. Followed by a hand sanding and a gumout spraying. I will do several high pressure water cleanings before I do the painting and installation.
Pete

Pete------


In the vast majority of the cases, and certainly in the case of the pan you pictured above, it is not necessary to use abrasive blasting to clean up an oil pan.

[Peter T.]

Re: '66 sb oil pan depth

Joe,I put my pan upside down on a flat service (rather than vica versa as I did before) and lo and behold it's 2 1/4"! I,m going to use Permatex Ultra Black at the where the seals meet the cork.
Pete

[Joe L.]

Re: '66 sb oil pan depth

Joe,I put my pan upside down on a flat service (rather than vica versa as I did before) and lo and behold it's 2 1/4"! I,m going to use Permatex Ultra Black at the where the seals meet the cork.
Pete

Pete-------


So, looks like my "eyeballing" of the radius was right!

I highly recommend using a 1 piece type oil pan gasket. Your chances of getting a leak-free seal, or, at the least, a minimal leak oil pan are much better with the 1 piece seal. For your pan the gasket is Fel-Pro OS34509T or Mahle OS32458.

[Gary B.]

Re: '66 sb oil pan depth

Pete-------


So, looks like my "eyeballing" of the radius was right!

I highly recommend using a 1 piece type oil pan gasket. Your chances of getting a leak-free seal, or, at the least, a minimal leak oil pan are much better with the 1 piece seal. For your pan the gasket is Fel-Pro OS34509T or Mahle OS32458.

Joe,

On Amazon it says the Fel-Pro is "Made with rubber and has a steel core". Is the Mahle gasket similar in composition? I'm not at all fond of the Fel-Pro bright blue. The Mahle looks like it's dark gray. If it's comparably made to the Fel-Pro, I'll chose the Mahle.

Gary

[Harry S.]

Re: '66 sb oil pan depth

Joe, I just started the C2's and I still continue to have an oil leak. One from the gasket and one from the plug. Anyway here is the question.

I'm not looking to spend time locating and fixing another original oil pan for a 63 with 300hp. What one piece gasket should I use on the 4qt oil pan that Keen Corvette Sells.

Here is a link ---> https://keenparts.com/corvette-parts...partnum=140406

Thanks

[Joe L.]

Re: '66 sb oil pan depth

Joe,

On Amazon it says the Fel-Pro is "Made with rubber and has a steel core". Is the Mahle gasket similar in composition? I'm not at all fond of the Fel-Pro bright blue. The Mahle looks like it's dark gray. If it's comparably made to the Fel-Pro, I'll chose the Mahle.

Gary

Gary------


I'm not sure if the Mahle 1 piece gasket uses a steel or plastic core. However, either way, I would consider the Fel-Pro and Mahle gaskets comparable and I would use the Mahle with no hesitation whatsoever.

[Joe L.]

Re: '66 sb oil pan depth

Joe, I just started the C2's and I still continue to have an oil leak. One from the gasket and one from the plug. Anyway here is the question.

I'm not looking to spend time locating and fixing another original oil pan for a 63 with 300hp. What one piece gasket should I use on the 4qt oil pan that Keen Corvette Sells.

Here is a link ---> https://keenparts.com/corvette-parts...partnum=140406

Thanks

Harry-----


I'm not sure if the Keen pan is a reproduction of the GM #3820000 (2-1/4" front seal radius) or GM #360866 (2-3/8" front seal radius). If it's the 3820000 then the 1 piece gaskets I mentioned above are the correct ones. If it's the 360866 use Fel-Pro OS34510T or Mahle OS30568.

[Mark P.]

Re: '66 sb oil pan depth

Harry and Joe - I bought the Paragon #5858 reproduction pan which is made by Keen. All measurements matched my original 1965 300HP pan. It has the 2 1/4" front radius seal so I used the Felpro 4 piece gasket. The listing says it is a repro of the GM 360866 pan so that means it should have had the 2 3/8" front radius seal. Maybe Paragon has the wrong GM part number. I applied the white paper below and it checked out. Don't remember where I got that white paper. Zip also gets their pans from Keen I have been told and they advertise an identical pan as "100% Correct. Excellent reproduction of the the original oil pans. Note to use the thin front oil pan seal, and highly recommend the use of the Fel-Pro one piece seal with this pan."

Does the photo of my engine and the other 2 photos look close to the original pan and use the 2 1/4" seal ?


Mark


White Paper:

To distinguish original SB oil pans GM #3820000 ("5 quart") and 3820001 ("6 quart") from their circe 1976 SERVICE replacements, GM #360866 ("5 quart") and GM #359942 ("6 quart"), do the following:Lay a straight edge across the front oil pan rails above the front seal radius. Then, measure from the BOTTOM surface of the straight edge straight down to the APEX of the seal radius (i.e. from the bottom of the straight edge to the CENTER of the front seal radius). If the measurement is 2-1/4", the the pain is of the original variety and requires the 63-74 style gasket or gasket set. If the measurement is 2-3/8", then the pan is the circe 1976 SERVICE replacement of the above-referenced part numbers and requires the 75+ style gasket or gasket set.
The same measurement can be used for C1 oil pans. If the measurement is 2-1/4", then the pan is an original and requires the pre-74 oil pan gasket or gasket set. If the measurement is 2-3/8" then the oil pan is the circe 1976 SERVICE replacement pan of GM #360867 (1956 only) or GM #359937 (57-62) and requires the 1975+ gasket or gasket set.

[Joe L.]

Re: '66 sb oil pan depth

Mark------


The pan looks very correct in all respects. I can't really tell about the front seal radius, though. However, if they say it's a reproduction of the GM #360866, then it should have the 2-3/8" front seal radius. It's VERY important to get this right in order to use the correct gaskets. If you use the 1955-74 gaskets with the 2-3/8"" front seal pan, you will have a massive oil leak when you run the engine.

[Mark P.]

Re: '66 sb oil pan depth

Thanks Joe - I will try to measure it as installed and will also check the tightness of the seal. I think it is very snug. I can also call Paragon.

Cheers,

Mark

[Mark P.]

Re: '66 sb oil pan depth

I reached out to Paragon and they confirmed the 5858 pan they sell works with their 13111K gasket set and I know that one has the thin seal. They have used this combination with some restorations and had no leaking.

[Harry S.]

Re: '66 sb oil pan depth

This is a two year old thread.

On the Mahle gasket, there is an OS30568, OS30568RLH, OS30568RRH and OS30568X. I would think the one piece needed for the 360866 pan is the OS30568RLH.

Also, I called Keen parts and they measured the front opening of their pan at 2 3/8. Confusing!!

Thoughts?

[Joe L.]

Re: '66 sb oil pan depth

This is a two year old thread.

On the Mahle gasket, there is an OS30568, OS30568RLH, OS30568RRH and OS30568X. I would think the one piece needed for the 360866 pan is the OS30568RLH.

Also, I called Keen parts and they measured the front opening of their pan at 2 3/8. Confusing!!

Thoughts?

Harry-----


Yes, the Mahle OS30568RLH is the one piece gasket for the 360866 oil pan as well as all the other 6 digit part numbered replacement oil pans released in the 1975+ period. Whatever type of gasket is desired, one should obtain gaskets catalogued for 1975-79 small blocks with left side dipstick.

If the Keen-supplied oil pan has a 2-3/8" front oil pan seal radius, then what they have reproduced is the 360866 and not the 3820000.

[Harry S.]

Re: '66 sb oil pan depth

Harry-----


Yes, the Mahle OS30568RLH is the one piece gasket for the 360866 oil pan as well as all the other 6 digit part numbered replacement oil pans released in the 1975+ period. Whatever type of gasket is desired, one should obtain gaskets catalogued for 1975-79 small blocks with left side dipstick.

If the Keen-supplied oil pan has a 2-3/8" front oil pan seal radius, then what they have reproduced is the 360866 and not the 3820000.

Agree. They advertise the pan as 63 - 79, that should be the 3820000. I said confusing because Mark said it's 2 1/4 and Keen measured 2 3/8.