Industrial crankshaft question

[plymouthdeluxe]

I have recently bought a rebuilt engine for my p-15. This engine has an industrial grade crankshaft instead of the standard issue one. Measuring the crankshaft on the original engine versus the rebuilt one, I have found that the industrial shaft sticks out 3/16 inches further. Will this work with the original flywheel and transmission?

Photos of original crankshaft

Photos of Industrial crankshaft in rebuilt engine

[Don Coatney]

Good question and I cannot answer it. However I can tell you what I had to do to make my combination of a Desoto long block engine, P-15 bell housing, and P-15 flywheel work. I was faced with the same problem. The Desoto 8 bolt crankshaft also extended further out the back than the stock P-15 crankshaft. The 4 bolt P-15 flywheel did bolt up using 4 of the 8 holes in the Desoto crankshaft. But I had to find the right combination as it will only line up one way.

The biggest problem I had was the starter using the stock P-15 configuration would not engage the flywheel as the flywheel was now sitting around 3/16" further back. My "fix" was to machine around 3/16" off of the "boss" where the starter motor bolts to the bellhousing as pictured below. This in effect moved the starter motor into the correct position so it would mate with the flywheel correctly. As I said this was my fix and before you do the same you must take careful measurements to insure this will work for your application.

I hope this information is helpful to you.

[plymouthdeluxe]

Thanks for the info on your solution Don. That definitely seems like it could work.

I was talking with a friend of mine and he suggested that perhaps a truck flywheel would be inset enough to make up for 3/16 extra. I've been looking for some information on truck flywheels but haven't come up with much yet on the measurements where it bolts on.

I've been thinking some of just switching out the industrial crank for the standard one and skipping out on machining anything anymore than I have to. Still in the information gathering stage though, so every idea is still an option.

[Dodgeb4ya]

I have done a few oddball industrial engine jobs-car to truck-truck to car -forklift ect. I don't think you will have a problem. Just put it together,make sure it all fits and the starter cranks it over before putting the engine/bell housing/flywheel and clutch back in the car. Have never had to do any major modifications.

Just get the proper flywheel bolts installed correctly for your application.

Bob

[37plymouth]

A flywheel from a1955 plymouth will sit back .200 thousands, just what you

need. This flywheel is about 8 pounds lighter than the P15s, might rev faster.

[KaptainRiktastik]

From what i understand the truck flywheel has a 3/16" difference to put the ring gear teeth in the right spot- otherwise the starter wont engage.

are you positive that's a 218 crank/rods and not a 230? they used many 230s in forklifts/other industrial.

I'm still learning up on this -my boy and I are picking up a 51-52 dodge truck from a coworker clearing off her late parent's farm.

If you want to get rid of that crank/rods, i may be interested -if not, are there more where you got that one?

rick.

[Andydodge]

Just went & checked the 230 Industrial engine I have and it also has an 8 bolt crank, the engines dissassembled at present and I'm not able to fit the crank into the block but I'd say the 230's at least are like this.........andyd

[Don Coatney]

The flywheel bolts you need must be grade 8 and have a shoulder long enough to insure the shoulder and not the threads are positioned at the shear point. Pictured are the bolts I used. I had to cut them to length and the nuts go on the engine side. If you cannot find the correct bolts locally let me know and I will send you some at shipping cost.

A 4 bolt flywheel will bolt up to an 8 bolt crankshaft but it will only fit one way. You must find the correct way in order to get all 4 bolts in.

[plymouthdeluxe]

I did find a guy here on forum that has a crankshaft out of a 218cid t-306 truck. I'm curious to know if that crankshaft is too long or if they were the same length. So if it has an 8 bolt pattern, does that mean it's an industrial?

Thanks everyone for your help!

From what i understand the truck flywheel has a 3/16" difference to put the ring gear teeth in the right spot- otherwise the starter wont engage.

are you positive that's a 218 crank/rods and not a 230? they used many 230s in forklifts/other industrial.

I'm still learning up on this -my boy and I are picking up a 51-52 dodge truck from a coworker clearing off her late parent's farm.

If you want to get rid of that crank/rods, i may be interested -if not, are there more where you got that one?

rick.

[Merle Coggins]

The T306 engine is from a '51 or '52 1/2 or 3/4 ton truck, and if it has 8 holes in the flange the truck would have had Fluid Drive. It was an option in the '50 - '53 trucks with standard 3 or 4 speed transmissions behind it.

Merle

[Young Ed]

The T306 engine is from a '51 or '52 1/2 or 3/4 ton truck, and if it has 8 holes in the flange the truck would have had Fluid Drive. It was an option in the '50 - '53 trucks with standard 3 or 4 speed transmissions behind it.

Merle

Merle do you know if the engine I got from you came out of a fluid drive truck? It has an 8 bolt crank. Dodge may have drilled them all for 8 bolts so that further down the assembly line tehy wouldn't have to worry about it.

[Merle Coggins]

That's a possibility. I don't know the history of that engine, except that it came out of a B3C truck. It didn't have FD from the time I had it. It would certainly make sense regarding parts commonality and reduced inventory.

Merle