kjr442

Is the 455 and 350 oil pan the same?

Allan R

I would have to say no because they are listed as separate part numbers in the GM Parts Manual. Group 1.426
350 - 68-74 - part number 555137
455 - 68-72 - part number 560174

Must be something to do with design because both the 350 and 455 use identical volumes of oil on changes.

Convertcrazed

Hey Allan...I just finished reading your thread in 2011 where you asked the same ?....As far as I can tell they are different, but will fit?
Eric

Convertcrazed

So Allen...did it fit?....LOL!
Thanks
Eric

Allan R

I have an oil pan from a 73+ 455 that I cleaned up. Far as I know the bolt pattern is the same. The 455 pan I have also has an oil capture flange to prevent oil from sloshing forward when the car is stopping suddenly. Wonder if that's the reason for the difference. I don't have a pre 72 455 pan to compare it to. Anyway, that's just a guess at best.

kjr442

I have a 350 pan that is rusted out. I will take it off tomorrow, and compare it to a 455 pan, if I can find it. I know it's somewhere in all my stuff.

Convertcrazed

Ok Kevin....Sounds good...thanks Also thanks to Allan Erichttp://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=5&cad=rja&u act=8&ved=0CDgQFjAE&url=http%3A%2F%2Fwww.ebay.com% 2Fitm%2F64-80-Oldsmobile-350-455-Chrome-Oil-Pan-Baffled-5qt-330-400-425-V8-Olds-%2F330846199974&ei=2j67VKDiAoSiyQTAi4KIBg&usg=AFQj CNG4giHOH-nz3l0UnGvcBYjXLXo8TA&sig2=ttzy9Kzt_WN33SUeRfC5pA

Convertcrazed

Opps...I guess I didn't do the link right.....anyway it will fit
Eric

2blu442

I was going through my pictures trying to find an example of each and struck out. I've only got pictures of the 455 on my photobucket site. Yes, as the other guys said they will bolt up as will the Toro oil pan. All big blocks back to 1965 have the baffle and are a different shape than the small block. John


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Allan R

Interesting pic John. My 455 pan looks a lot different than that.

2blu442

At the risk of being accused of hijacking your thread Kevin, I now have some pictures I can post. These will all bolt up to any 330, 350, 400, 403, 425, 455 from the 1960's into 1970's for sure, likey into the 1980's but I'm not familiar with those vintage cars/engines.

Allan, I'm not sure which oil pan you have, but here's some different ones from different years/applications. The first set of three are from left to right, 1965 400 (note the big oil drain plug needing the special tool or 1/2" ratchet to remove) 1970 455 and the last I believe to be from mid 1970's 455. They all have the same baffle and generally the same shape.

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Now here's three more starting with a 1967 425 Toronado pan on the left, 1970 455 in the middle, and 1968 350 on the far right. The 350 pan does have a large dent in the bottom, not factory! The Toronado has a different baffle in the pan and also had two pieces that attached to main caps.

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Octania

"They all have the same baffle and generally the same shape. "


In much the same way, my wife is just like Christie Brinkley. Pretty much the same parts and shape. Not much difference.

:-)

kjr442

Thank you for all the pictures John.

455man

As far as i know the baffle is the only difference between the 350 and the 455 oil pans. 455 have em and the 350 dont. The toro pans are shaped different and hold more oil and have a crank scraper but no baffles attached to the pan.

joe_padavano

Look again. The middle pan in this photo is a BBO pan, the far pan is an SBO pan. The difference is the two bulges in front of the sump. You can physically bolt either pan to either block, but they are different. Of course, the near pan is a Toro.

DSCN2564.jpg

455man

Ok. I see the difference. Joe do you know what the purpose of the bulge is for? They hold he same capacity, right?

joe_padavano

They are both rated the same, but obviously the total volume in the BBO pan is greater. That means for the same five quarts, the level in the BBO pan would be slightly lower. I suspect that this is an attempt to reduce the windage loss from the larger crank throws and counterbalance weights on the BBO crank by lowering the oil level relative to the crank centerline, but that's just a guess.

455man

That makes sense.

nsnarsk65cutlass

They bolt up the same the only difference is frame requirements.

joe_padavano

NOOOOOOOO.....

There is no difference it the "frame requirements". Any Olds oil pan will bolt to any Olds block and will fit in any RWD Olds frame, period.

And if you are referring to the frame pads for motor mounts, you haven't been paying attention.

nsnarsk65cutlass

They are different getting back to OPS question. Fitting any oil pan into any rear wheel drive olds vehicle not sure on that one.Not referring to motor mounts.

joe_padavano

Well, be sure about it. There were NEVER any frame differences to accommodate different oil pans. Both the BBO and SBO pans will fit on either block into ANY 1964-1990 Olds factory RWD chassis that originally came with an Olds V8. That means that there are NO frame differences for oil pan on any RWD A-body, B-body, C-body, F-body, G-body, or X-body.

The Toro pan also clears the A-body chassis. I cannot vouch for it's clearance in any other RWD chassis, but I suspect it will work just fine.

73aussie455

good info here.

at the risk of sounding like a noob,
is the depression in the toro pan for clearance of the toro cross member, necessary for clearance in an A body rwd?

wr1970

No it will fit fine in a A body RWD.

joe_padavano

The divot in the Toro pan is for clearance of the RH axle shaft where it passes under the oil pan and is irrelevant when this pan is used in an A-body.

73aussie455

So a good sheet metal guy could beat that divot out allowing the oil held back to run freely and not affect the fit or clearance.

joe_padavano

Heck, a crappy sheet metal guy could do it.

joe_padavano

Which looks exactly like a BBO pan.

wr1970

For the amount of oil that is dammed up by the divot why do anything After all it isn't much! Use as is. It is your pan do what you want.

455man

Here what I did to my toro pan.