Boat oil pan?

[dyeager535]

Anyone know if anything is different about the boat pans that would preclude them from being used on any other SBC? Obviously one piece rear main is '86+, which I have, passenger dipstick, but other than that, any real differences that wouldn't allow them to fit in a K5 if I wanted to go that route?

Didn't know these existed soon enough, already have another en route from Summit, but for the price thinking one of these might be too good to pass up, just to have: http://www.ebay.com/itm/Mercruiser-...ash=item27df5e66ca:g:SWoAAOxy-WxTC8cV&vxp=mtr

I suspect the threads are 12MM, not 14 (not that it matters) and from what I could find elsewhere, they are probably 6 quart pans. More than necessary, but GM quit making their 5qt pans apparently, so either high dollar for better race-oriented pans like Milodon, or chinese stampings for not a bunch.

 

[Bent77]

Honestly looks like it would work

 

[ryoken]

yup, same stuff basically, stamping, steel, etc.... as long as the dipstick config is the same... they are actually 5 qrt usually... but with marine remote filtering and such, it usually equals 6 in the end....

 

[dyeager535]

yup, same stuff basically, stamping, steel, etc.... as long as the dipstick config is the same... they are actually 5 qrt usually... but with marine remote filtering and such, it usually equals 6 in the end....

Looking at the Dorman replacements for that pan, they indicate an 8" depth. I'll probably pass, but it's tempting. I'd rather just stick with the stock depth.

BTW, the vendors aren't real consistent...found the same pan part numbers listed as 4, 5, and 6qts. But I suspect it to be 6. Found one Dorman listing that said it was, sump is a 1/2" deeper, and stepped area forward of the sump would seem to increase capacity over this, which is a 5qt: https://www.summitracing.com/parts/sum-g3503x

Appreciate the input!

 

[1-ton]

If those are Factory GM oil pans, then they would be a screaming deal, but for the price they are asking...I would not be so sure of that. I have found that all the specifications claimed by the people selling oil pans are "out to lunch". The pan I bought from Dorman had a lot of similar claims about specification that where not true. What I did find was that the depth of the 5-QT pan I bought for my new crate small block Chevy had the exact same depth as the 4-QT pan my crate engine came with. The only difference was the second step in the pan, which is what gives the pan the increased capacity.

 

[AV8TER]

I've used a couple marine Gen VI big blocks in my K5. The first one was a KEM engine and the front of the pan was so deep the front diff would hit it. Had to cut a chunk out of the pan to clear. The second was a Mercruiser I/O and the rods that go from the motor mount to the bellhousing would hit the back of the pan. It took some modifications with a kinetic pan modifier. It had enough room to clear the front diff but that was also after a lift and longer bump stops.

 

[dyeager535]

If those are Factory GM oil pans, then they would be a screaming deal, but for the price they are asking...I would not be so sure of that.

Yes, for $55 I'm pretty sure it's not a GM part. GM pans run $100+ from what I was able to find.

Got the summit pan in my hands last night, and I suppose I shouldn't be too hard on it's quality. Haven't put a straightedge on it yet, but overall looks pretty good. But don't put bare skin anywhere near the front/rear seal surfaces, whoever made it has never heard of deburring. All the spot welds on the baffle look good, no obvious bends or dents that aren't supposed to be there.

I'll go ahead and make some measurements while I have both pans off, once I get a dipstick I'll probably figure out actual capacity.

I've got what I believe is a 5qt in the truck now, I'll try and remember to check the relationship to the front diff before I yank the motor. It's never hit, but a longer, deeper pan may get just close enough.

 

[1-ton]

I've got what I believe is a 5qt in the truck now, I'll try and remember to check the relationship to the front diff before I yank the motor. It's never hit, but a longer, deeper pan may get just close enough.

I am not sure what type of truck you are working on, but with my 1-ton crew cab the pan comes nowhere near the diff. The very front of the pan, right at the timing cover, rest just above the engine cross member, and the deeper sump part of the pan is far behind the diff.

 

[dyeager535]

I was responding to AV8TER, who said his BBC pans hit. I could be wrong, other than being longer, I figured the pan "hang down" was about the same for a BBC and SBC. If there are pans out there deep enough to hit with a BBC, I assume it must be possible with a SBC.

I'll look, but I agree, it would most likely have to be a very goofy pan to hit with a SBC.

 

[1-ton]

I was responding to AV8TER, who said his BBC pans hit. I could be wrong, other than being longer, I figured the pan "hang down" was about the same for a BBC and SBC. If there are pans out there deep enough to hit with a BBC, I assume it must be possible with a SBC.

I'll look, but I agree, it would most likely have to be a very goofy pan to hit with a SBC.

I guess I did not read the post close enough. I thought you where talking about the pan you just bought. The small block Chevy is such a small engine in a large truck engine bay that they sit pretty far back on the engine cross member. Since the Big Block is a larger engine, they sit more farther forward on the engine cross member, and the second step on a larger capacity oil pan could interfere with the cross member.

 

[1-ton]

After looking closer at the my K30 with a 454, it too has the front of the pan sitting over the cross member like the small block, but the deep sump part if it is wider, and closer to the front diff pinion area than a small block pan.

 

[nvrenuf]

A pan for Mark IV K30 will have a notch in it for the diff, it's not much but it's there.