Engine Serial number.

[Guest BusinessC]

I have a 47 Dodge D24, and have got engine parts that will not fit when buying distributor-cap, rotor and points. The same thing happened when trying to put a new temp gauge sender into the top.

I have now found out that the engine number is P25-134567, and I am afraid the engine might be out of a Plymouth of another year han mine car.. Is anyone out there familiar with the block-numbers, I would be very pleased to know what year and what model to buy engine parts for in the future. Thanks.

[BobT-47P15]

Yes.....a P25 is a Plymouth number. Dodge should begin with a D.

Someone else will have to say what year Plymouth it is.

[TodFitch]

P25 would be for a 1954 Plymouth.

[Don Coatney]

If your Dodge has fluid drive you may have a serious problem. Plymouth engines have a 4 bolt crankshaft hub and Dodge has an 8 bolt. The 8 bolt is required with a fluid drive.

[Guest BusinessC]

I have a 47 Dodge D24, and have got engine parts that will not fit when buying distributor-cap, rotor and points. The same thing happened when trying to put a new temp gauge sender into the top.

I have now found out that the engine number is P25-134567, and I am afraid the engine might be out of a Plymouth of another year han mine car.. Is anyone out there familiar with the block-numbers, I would be very pleased to know what year and what model to buy engine parts for in the future. Thanks.

I have a fluid-drive in my car, and until now, it has worked just fine.

What could be the problem?

[Normspeed]

Your P25 number says it's a 54 Plymouth block. During model year 1954, Plymouth increased size from a 218 to a 230 cubic inch displacement. The 230 has a longer stroke (different crankshaft and rods). At home I have the serial number list that tells which numbers were 218s. I'll look that up and post it later.

[Don Coatney]

You may be fortunate and the engine builders who did your car swapped the Dodge crankshaft into the Plymouth engine. The fluid drive will bolt up to the Plymouth crankshaft but the 4 bolts will shear off as 8 bolts are required.

[Plymouthy Adams]

Yes..Plymouth went to the larger 230 but only after serial number P25-243001...looks like you stuck with a 218...unless someone threw a 230 crank and rods into it.

[greg g]

my 56 engine is a 230 and had a 6 bolt crank flange. The rotating mass of the fluid drive is heavier than the regular clutch set up, as such it requires a bit more attaching hardware than the regular standard drive train. With 6 of eight yer prolly ok. Put the engine so that number one cylinder is at TDC, then pull the distributer after marking the rotor position in reference to the block. then take the distributor number off the Data plate to the parts store with you. There are several distributors available that will work across the MOPAR Flat 6 engine line but there are some differences in the internals and caps. The number should start with IAT or IDT. I have a 54 truck dizzy in my 56 engine. Its points are mounted on the opposite side of the breaker plate from the original but is works fine as long as the internals and cap are for the right Dist.

[Don Coatney]

my 56 engine is a 230 and had a 6 bolt crank flange.

Greg;

Is six bolts correct? Is that what your crankshaft has? Does your flywheel have 6 bolt holes?

[wayfarerstranger]

i have a 54 plymouth motor with no #`s stamped on the side but had the 8 bolt pattern , but i`m using a non fluid drive standard 3 spd . it`s in a 49 woodie .. and another 54 with the serial # 340374 so i guess they are both 230`s ?? but it only has the 4 bolt s ... was going to put it in my 50 dodge wayfarer with fluid drive , looks like i got it backwards... i guess i`ll use a stanard 3 spd. on it too and not have fluid drive in the dodge .. which shouldn`t be an issue ..

[greg g]

yep 6 on an offset pattern.

[Don Coatney]

yep 6 on an offset pattern.

I did not know a six bolt pattern was used. The 4 and 8 bolt patterns are also offset but a 4 bolt flywheel will work on an 8 bolt crankshaft but only bolts on one way. Was your flywheel drilled for 6 bolts or did you use the 4 bolt P-15 flywheel?

[greg g]

Used all the 56 engine bits, with the clutch cover and friction disc off the 46 as there were relatively new. As far as I know the set up was as it came. But can't say for sure.