5.7 ENGINE OIL PAN

[B.Ross2009]

I am building a Goodwrench 5.7 350 engine for my boat the old engine is an OMC 350 5.7 my new engine is a 2 piece rear main seal and the old engine is a 1 piece rear main seal. Is there a difference in oil pans should I buy a marine oil pan for my new engine or use the oil pan that is not a marine oil pan? what's the difference in the 2 oil pans?

 

[Bondo]

the old engine is an OMC 350 5.7 my new engine is a 2 piece rear main seal and the old engine is a 1 piece rear main seal.

Ayuh,..... Welcome Aboard,..... Why are you goin' backwards,..??

Yer gonna have more issues than just the oil pan not fitting,....
The flywheel, 'n coupler are also different,.....

The 1-pc. seal crankshaft is a 3" bolt pattern, 'n the 2-pc crank pattern is 3, 1/4",.....

 

[B.Ross2009]

Ayuh,..... Welcome Aboard,..... Why are you goin' backwards,..??

Yer gonna have more issues than just the oil pan not fitting,....
The flywheel, 'n coupler are also different,.....

The 1-pc. seal crankshaft is a 3" bolt pattern, 'n the 2-pc crank pattern is 3, 1/4",.....

It was what i could find at the time for an engine but it came with everything i needed have a swap just cant decide if im gonna use the pan i already have or buy a marine one

 

[Bondo]

It was what i could find at the time for an engine but it came with everything i needed have a swap just cant decide if im gonna use the pan i already have or buy a marine one

Ayuh,..... So long as ya got the dipstick figured out, go ahead, 'n use what ya got,.....

 

[B.Ross2009]

im pretty sure i will have room for the original dipstick set up could i use the marine oil pan or is it different between blocks?

 

[Bondo]

im pretty sure i will have room for the original dipstick set up could i use the marine oil pan or is it different between blocks?

Ayuh,..... Marine, truck, 'n car, are all the same blocks,.....

Some marine oil pans have the dipstick mounted in the pan,........ some don't,.......
Trucks, 'n cars might use the same exact pan,..... others don't,.....

The pickup/ car dipstick might interfere with the exhaust manifolds,.... or not,....

What did this replacement motor come out of, anyways,..??

 

[B.Ross2009]

The engine is a crate motor came out of a truck. i was told that the 1 piece rear main seal oil pan wont fit the 2 piece engine. the omc oil pan has the dipstick mounted on the bottom with the banjo bolt

 

[Bondo]

The engine is a crate motor came out of a truck. i was told that the 1 piece rear main seal oil pan wont fit the 2 piece engine. the omc oil pan has the dipstick mounted on the bottom with the banjo bolt

Ayuh,..... Hope the new pan has inch threads, 'n not metric,....

 

[Scott Danforth]

No way to use the old pan

 

[B.Ross2009]

will I have a problem using the pan on the engine? im not sure if the dip stick will be in the way

 

[Bondo]

will I have a problem using the pan on the engine? im not sure if the dip stick will be in the way

Ayuh,.... Donno,.... We can't see what yer lookin' at,....

 

[B.Ross2009]

I mean is there a difference between a 1 piece rear main seal oil pan and a 2 piece rear main oil pan? if there isnt then ill use the marine oil pan.

 

[Bondo]

I mean is there a difference between a 1 piece rear main seal oil pan and a 2 piece rear main oil pan? if there isnt then ill use the marine oil pan.

Ayuh,..... I answered that in post #2,...... NO,.... They will NOT swap,...

 

[B.Ross2009]

Ok thats what I thought and was told im going to find a marine oil pan for a 2 piece rear main engine. Any ideas on a good place to look?

 

[Bondo]

Ayuh,.... What's the problem with the pan that came on the new motor,..??

There is no "Marine" pan,..... just pans that fit yer application,....

 

[B.Ross2009]

Theres nothing wrong with the pan. I just wasnt sure if the extra oil would be better for the engine. I'm going to see if the dipstick with the banjo bolt will fit into the drain hole

 

[kenny nunez]

The Good Wrench drain thread is 1/2”-20. I used many of those engines as replacements for cracked blocks. Sometimes I had to drill out the drain plug and weld a female pipe thread fitting to it. Then make up a new dipstick tube with some 3/8” steel tubing.

 

[B.Ross2009]

The Good Wrench drain thread is 1/2”-20. I used many of those engines as replacements for cracked blocks. Sometimes I had to drill out the drain plug and weld a female pipe thread fitting to it. Then make up a new dipstick tube with some 3/8” steel tubing.

Thank you for the info im going to see if i can find a bajo bolt that could fit the oil pan with what i have as i dont have a welder to that. good to know the engine wont be an issue for the boat

 

[Lou C]

Before doing anything I’d see if the banjo bolt from the original engine fits the one you are replacing it with. Also and perhaps more important are the flywheels different? Will the coupler from the original engine bolt onto the one for the 2 piece main seal???
Cobra or Stringer?

 

[B.Ross2009]

Before doing anything I’d see if the banjo bolt from the original engine fits the one you are replacing it with. Also and perhaps more important are the flywheels different? Will the coupler from the original engine bolt onto the one for the 2 piece main seal???
Cobra or Stringer?

The flywheel and coupler is different i replaced both to match engine the dip stick was my issue but i found a banjo bolt that will work