Correct Reproduction Oil Pan for '69 BB?

[Douglas P.]

Hello All,

Since my original oil pan is in rough shape (rusted/dented) and may not be salvageable I'd like to know if any of the Corvette parts suppliers sell a correct reproduction for my '69 BB (L71/435HP) application.

Thanks in advance,

Doug

[Joe L.]

Re: Correct Reproduction Oil Pan for '69 BB?

Hello All,

Since my original oil pan is in rough shape (rusted/dented) and may not be salvageable I'd like to know if any of the Corvette parts suppliers sell a correct reproduction for my '69 BB (L71/435HP) application.

Thanks in advance,

Doug

Doug-----


The bad news is that there is no "reproduction" oil pan, per se, available for 1965-74 Corvette big blocks. The good news is that there is an oil pan still available from GM which is about 99%+ correct for your application. You can order one under GM #14091356 and you should be able to buy it for less than 150 bucks. If you add oil pan rail corner reinforcements to this pan (available from most of the Corvette parts vendors) you will have a pan that's virtually identical to the original. You don't need to spot weld the reinforcements to the rails; the oil pan bolts will retain them nicely. The fact that this pan is still available from GM is a real boon to 65-74 Corvette big block owners. One of these days, when it's gone, folks are going to lament its "passing".

[Douglas P.]

Re: Correct Reproduction Oil Pan for '69 BB?

Doug-----


The bad news is that there is no "reproduction" oil pan, per se, available for 1965-74 Corvette big blocks. The good news is that there is an oil pan still available from GM which is about 99%+ correct for your application. You can order one under GM #14091356 and you should be able to buy it for less than 150 bucks. If you add oil pan rail corner reinforcements to this pan (available from most of the Corvette parts vendors) you will have a pan that's virtually identical to the original. You don't need to spot weld the reinforcements to the rails; the oil pan bolts will retain them nicely. The fact that this pan is still available from GM is a real boon to 65-74 Corvette big block owners. One of these days, when it's gone, folks are going to lament its "passing".

Joe,

Thanks for the advice. I ordered one today.

Doug

[Dick W.]

Re: Correct Reproduction Oil Pan for '69 BB?

Biggest noticeable difference is the part number stamped in the pan. Scuff the paint of in that area, carefully fill the numbers in with JB Weld and paint engine color. Problem solved.

[Joe L.]

Re: Correct Reproduction Oil Pan for '69 BB?

Biggest noticeable difference is the part number stamped in the pan. Scuff the paint of in that area, carefully fill the numbers in with JB Weld and paint engine color. Problem solved.

Dick-----


Yes, earlier versions of this pan did not have a part number stamped on them but those available for the last several years do. After 50+ years of rarely, if ever, stamping part numbers on oil pans, GM FINALLY "wises up" and, as luck would have it, it turns out to be a detriment for us.

By the way, the number stamped on the pan is not 14091356. That's because 14091356 is the part number for the unit which includes the oil pan, windage tray and instruction sheet. The number stamped on the pan is the actual part number of the pan, itself, which is not available separately.

[Mark E.]

Re: Correct Reproduction Oil Pan for '69 BB?

The replacement pan 14091356 apparently has the drain plug on the driver's side of the sump. The drain plug on the existing pan of my 1970 LS-5 is along the rear edge of the sump, facing the flywheel.

Which is "correct"?

[Edward B.]

Re: Correct Reproduction Oil Pan for '69 BB?

Mark, take a look at the pictures I posted on THIS THREAD.

Ed

[Joe L.]

Re: Correct Reproduction Oil Pan for '69 BB?

The replacement pan 14091356 apparently has the drain plug on the driver's side of the sump. The drain plug on the existing pan of my 1970 LS-5 is along the rear edge of the sump, facing the flywheel.

Which is "correct"?

Mark------


If you're looking at a GM #14091356 oil pan that has a side oil drain, then you're NOT looking at a GM #14091356. Either it's mis-boxed or otherwise mis-identified. The GM #14091356 has an oil drain on the rear of the pan, slightly offset to the left. This is exactly the same as all original 1965-74 Corvette big block oil pans. 1965-69 Corvette oil pans had corner reinforcements; the 14091356 does not (but they can easily be added). Also, 1965-69 Corvette big block oil pans had the internal baffling designed for a 3.76" stroke crankshaft. 1970-74 Corvette oil pans as well as the 14091356 have internal baffling designed for a 4" stroke crankshaft. So, when the 14091356 is used on 1965-69 applications, the external baffle (windage tray) supplied with the 14091356 should be used.

Actually, 14091356 is not the actual part number of an oil pan. It's the part number of a UNIT which includes the pan, external baffle, and instructions. The part number of the oil pan is 14095703 but it's not available separately under that part number.

[Mark E.]

Re: Correct Reproduction Oil Pan for '69 BB?

Thanks for the help guys. The confusion is from the photos of 14091356 shown on many of the parts vendors' web pages. They show the same stock photo with the drain plug on the left side of the sump. I even called one store, and they erroneously confirmed (probably by looking at the photo, not the part) that the drain plug is on the left.

I later found several threads on this forum stating that the drain plug for 14091356 is indeed along the rear edge of the sump, and that the photos used by suppliers is often wrong.

Mystery solved, but you would never guess how much time this wrong photo has cost me. Sometimes working on an old Corvette is a bit like being a detective and problem solver all in one. I wonder how many other folks will stumble through this confusion before the photo is corrected?

[Joe L.]

Re: Correct Reproduction Oil Pan for '69 BB?

Thanks for the help guys. The confusion is from the photos of 14091356 shown on many of the parts vendors' web pages. They show the same stock photo with the drain plug on the left side of the sump. I even called one store, and they erroneously confirmed (probably by looking at the photo, not the part) that the drain plug is on the left.

I later found several threads on this forum stating that the drain plug for 14091356 is indeed along the rear edge of the sump, and that the photos used by suppliers is often wrong.

Mystery solved, but you would never guess how much time this wrong photo has cost me. Sometimes working on an old Corvette is a bit like being a detective and problem solver all in one. I wonder how many other folks will stumble through this confusion before the photo is corrected?

Mark------

The oil pan they picture is most likely a GM #14103141. This is the non-Corvette Mark IV big block oil pan and it does have a side drain.

[Mark E.]

Re: Correct Reproduction Oil Pan for '69 BB?

I ordered and received 14091356 the other day, and I can confirm that the pan looks identical to the original on my 1970 454. The kit includes:

- Oil pan with drain plug fitting located along rear edge of the sump (as original)
- Drain plug
- Oil baffle for 454 (4" stroke) welded in place
- Oil baffle for 3.76" stroke loose in box
- Instructions about which baffle to use.

$118 at Jegs with free shipping and no sales tax. Not a bad deal.

As you guys noted, it did not include corner reinforcements. Also, I didn't see any numbers stamped into the pan; maybe they stopped the practice of stamping the pn.

[Mark E.]

Re: Correct Reproduction Oil Pan for '69 BB?

1970-74 Corvette oil pans as well as the 14091356 have internal baffling designed for a 4" stroke crankshaft. So, when the 14091356 is used on 1965-69 applications, the external baffle (windage tray) supplied with the 14091356 should be used.

I wanted to correct my last post and emphasize the quote above by Joe from an earlier post. The 14091356 oil pan "kit" includes:

- Oil pan with drain plug fitting located along rear edge of the sump (as original)
- Drain plug
- Oil baffle welded in place that looks identical to the baffle in the old oil pan in my 454
- A windage tray loose in box
- Instructions stating that the windage tray (instructions call it the "upper oil baffle") is for 1969 and earlier applications (I assume this means for 3.76" stroke engines)

[Mark E.]

Re: Correct Reproduction Oil Pan for '69 BB?

After removing the old oil pan from my 1970 LS5 454, I discovered that it has a windage tray installed (what the instructions for 1409135 call the "upper oil baffle") that is identical to the windage tray provided in the 1409135 kit.

But from the posts above, and from the instructions, it sounds like the 454 should not have a windage tray. Is this correct, and should I not reinstall the windage tray? Or do some/all 454 engines have a windage tray installed?

[Joe L.]

Re: Correct Reproduction Oil Pan for '69 BB?

After removing the old oil pan from my 1970 LS5 454, I discovered that it has a windage tray installed (what the instructions for 1409135 call the "upper oil baffle") that is identical to the windage tray provided in the 1409135 kit.

But from the posts above, and from the instructions, it sounds like the 454 should not have a windage tray. Is this correct, and should I not reinstall the windage tray? Or do some/all 454 engines have a windage tray installed?

Mark------

ALL 1965-74 Corvette big blocks were originally equipped with an external baffle ("windage tray"). If you have a 454, the external baffle installed is, as you have observed, exactly the same as the one supplied with the GM #14091356 oil pan. There is no need for you to replace the currently installed external baffle with the one supplied with the pan. However, you can if you want to. Assuming your current baffle is in good condition, nothing will be gained by replacing it. These baffles are not what one would consider a "wear part".

[Mark E.]

Re: Correct Reproduction Oil Pan for '69 BB?

Thanks Joe. What throws me off is that the instructions and your earlier comment say the upper oil baffle (aka, windage tray) is only used 1965-69.

This is one of those "might as well" projects. This started as replacing a leaking rear main oil seal. Since they are being removed to do this, I "might as well" replace the beat up oil pan, and "might as well" rebuild the starter. So that's why I need to R/R the upper oil baffle.

Have you ever had a "might as well" project get out of hand? I also need to install the missing tunnel insulation that's under the floor hump. Since I'm removing the exhaust and transmission, I "might as well" install new seals/bearings/synchros in the M20, replace the clutch and u-joints, install a correct exhaust, detail the underside area, ...