Rear Sump oil pan question

[Big-Daddy]

Reading another post here on this board, I just learned the 425's have a rear sump pan. It also says "it does not go all the way back like an eldorado" [?]

I guess my basic question is this. Will a RWD 425 pan work in a swap just like an eldo pan? My eldo pan is scraped up pretty good, but the local recycler has a bunch of complete 425's sitting around.

By the way, it's going [back in to] a 71 Pontiac LeMans [GTO clone], I'v also got a 1977 Chevy Nova project on the back burner that will be receiving Cad-power sometime in the future. 425 pan work? Or do I need another eldo unit?

Thanks guys :D

[dave_brode]

Big-Daddy,
The rwd '77-'79 425 [and '80-'84 368 rwd] pan is more of a mid sump pan. Sort like a 340 mopar pan. I doubt that it'll work for your LeMans swap.

Fyi - I'm pretty sure that the '77 and '78 fwd 425 pan is same as '76 and older pfwd ans. You might want to gather all of them you can, esp the pu tubes, since the tubes are no longer available new.
Dave



"]Reading another post here on this board, I just learned the 425's have a rear sump pan. It also says "it does not go all the way back like an eldorado" [?]

I guess my basic question is this. Will a RWD 425 pan work in a swap just like an eldo pan? My eldo pan is scraped up pretty good, but the local recycler has a bunch of complete 425's sitting around.

By the way, it's going [back in to] a 71 Pontiac LeMans [GTO clone], I'v also got a 1977 Chevy Nova project on the back burner that will be receiving Cad-power sometime in the future. 425 pan work? Or do I need another eldo unit?

Thanks guys :D[/quote]

[68C15]

I have a 425 pan & getting ready to tryit along with my 68 472 into a 68 GMC. I may have to do a little fab work on the drain plug, but I believe it will work.

[dave_brode]

68C15,

Yes, the mid sump rwd pan works for most GM truck swaps, as the bottom of the pan's sump is actually above the bottom of the frame crossmember. Only when depth is added to that pan [for more oil] does sump to frame crossmember clearance become an issue on the truck swaps. Most GM midsize cars will require a rear sump pan though.
Dave


"]I have a 425 pan & getting ready to tryit along with my 68 472 into a 68 GMC. I may have to do a little fab work on the drain plug, but I believe it will work.[/quote]

[Big-Daddy]

You might want to gather all of them you can, esp the pu tubes, since the tubes are no longer available new.
Dave


If only I could find some to gather up :roll:

Thanks guys, I appreciate it very much

[~JM~]

Don't forget the 368 rear sump pan.

Those are pretty easy to find.

~JM~

[dave_brode]

JM,

Does the rear sump 368 pu tube work on 425-500s?
Dave


~"]Don't forget the 368 rear sump pan.

Those are pretty easy to find.

~JM~[/quote]

[~JM~]

JM,

Does the rear sump 368 pu tube work on 425-500s?
Dave

That, I don't know.

The pan is a nice shaped pan though.

~JM~

[fast large one]

Hey, speaking of pans, I've got a rear sump pan for my GM A-body swap and I was wondering if anyone had any swap experience with the type I have. I know there are two kinds, and mine is the one that looks sorta funky because it actually is welded from the factory in the sump area. If you didn't know any better, you'd think someone extended the sump in their home garage.

From pictures I have seen it appears this pan's sump hangs a bit lower than the other type. Anyone got some feedback on that?

Thanks,
flo

[dave_brode]

flo,

Afaik, the welded sump pan is what's referred to as a 368 fwd pan, but it may've been used on '79 425" powered fwd cars too. Not certain of that. I assume that '79-79s are 425, and '80-'84s are 368".

Not sure what pu tube the '79 425" powered fwd cars used, if there were 425" fwd powered cars in '79. Afaik, the 368 pu tube will not work on 425-500s. Perhaps the '79 fwd pu tube is one year only?

Anyone knows, let's hear it.
Dave




quote="fast large one"]Hey, speaking of pans, I've got a rear sump pan for my GM A-body swap and I was wondering if anyone had any swap experience with the type I have. I know there are two kinds, and mine is the one that looks sorta funky because it actually is welded from the factory in the sump area. If you didn't know any better, you'd think someone extended the sump in their home garage.

From pictures I have seen it appears this pan's sump hangs a bit lower than the other type. Anyone got some feedback on that?

Thanks,
flo[/quote]

[fast large one]

Hmmm...sounds like I've screwed myself. Naturally, I don't have a PU tube for it.

[~JM~]

Hmmm...sounds like I've screwed myself. Naturally, I don't have a PU tube for it.

If you can't find or fab one you can buy a fancy one here:

http://stores.ebay.com/PROTOTYPE-ENGINEERING_500-cadillac-parts_W0QQcolZ4QQdirZ1QQftidZ2QQtZkm

~JM~

[fast large one]

*flo smacks forehead* :roll:

Wait a minute! I was thinking "dipstick tube" and writing "PU tube." I DO have the pickup tube that goes with it.

[dave_brode]

flo,

Does it fit the 425/472/500 blocks?
Dave


*flo smacks forehead* :roll:

Wait a minute! I was thinking "dipstick tube" and writing "PU tube." I DO have the pickup tube that goes with it.

[fast large one]

Dave,

Glad you asked. It didn't even occur to me that the pickup tube for this oil pan might not fit my 500. I'll need to do some research. If it doesn't...does that mean I need a custom pickup that will work with a 500 engine and a 368 pan? Doh. :roll:

[dave_brode]

flo,

Afaik, the 368 was '80 up, and the 425 was '77-'79.
The last year for the really big fwd eldo was '77 -or was it '78?
So, the "368" pan should also be on the fwd cars after the body change.

I'm assuming much here: that the "368" pan was also used on the '79 eldos, which I assume had a 425. If so, the pu tube from the downsized 425" eldo pan should work, since it's same as the 368 pan.

I might be all wet here though. I have a list of all the different aftermarket pu tubes somewhere, but I can't put my hands on the copy.I posted it here some time ago.
Dave


Dave,

Glad you asked. It didn't even occur to me that the pickup tube for this oil pan might not fit my 500. I'll need to do some research. If it doesn't...does that mean I need a custom pickup that will work with a 500 engine and a 368 pan? Doh. :roll:

[KJC]

I'm not completely sure, but I think I remember reading that the hole for the pickup tube on a 368 is on the opposite side than that on a 500. :?:

[DV8]

In my g-body swap ('81 Grand prix) I am using a 425 pan on a 500.

It comes close to the crossmember. You will have to move the drain plug to the side or rear of the pan, and taking a little out of the front edge of the sump wouldn't hurt either, depending on how low your engine sits.

Definitely sounds like a 368 pan you have there. The pickup tube does go on the "wrong" side as compared to a 500/472/425.

I'd use the 368 pan with a modified 425 pickup. Time to break out that welder or just mock it up and take it to someone who does weld. Pickups aren't that complicated....

The 368 pan might need "clearanced" with a BFH to keep the crankshaft from slightly bumping it, be sure to check before buttoning everything up.
It doesn't take much, but does need checked and tweaked if necessary.

Chris

[Big-Daddy]

In my g-body swap ('81 Grand prix) I am using a 425 pan on a 500.

Chris

Is that a FWD or RWD pan your using???

[DV8]

It's a mid-sump.