larryconnors Posted August 2, 2013 Report Share Posted August 2, 2013 Plymouth switched over from 217's to 230 engines in the middle of the 1954 model year Feb 24th. How can you tell from looking at an engine if it's a 217 or a 230? I'm thinking of putting one in my P15. Quote Link to comment Share on other sites More sharing options...
Scruffy49 Posted August 2, 2013 Report Share Posted August 2, 2013 Block casting date? I know the spare engine for my truck has a 1955 casting date (230), the current engine has a 1948 casting date (218). Both came out of Plymouths... Quote Link to comment Share on other sites More sharing options...
Plymouthy Adams Posted August 2, 2013 Report Share Posted August 2, 2013 depends on the production date of the engine...the transition year 1954 used both 218 and 230..the very identifier for the P25 stamped engine is the presence of a diamond emblem in the block serial number which denotes the 230.. Quote Link to comment Share on other sites More sharing options...
steve3050 Posted August 2, 2013 Report Share Posted August 2, 2013 The Plymouth Owners Club judging information for 1954 says that the last 218 engine was P25* 243000 and the first 230 engine was P25* 243001. This changeover happened at the same time that Hy-Drive transmission option was phased out and the Powerflite came in. Quote Link to comment Share on other sites More sharing options...
larryconnors Posted August 2, 2013 Author Report Share Posted August 2, 2013 The engine number is Diamond P25 Star 346043 Star making it a 230. I could't read the block casting date but it says 5.7.54 on the head. If I may say so, you guys are amazing. Quote Link to comment Share on other sites More sharing options...
greg g Posted August 2, 2013 Report Share Posted August 2, 2013 The 230 is a worth while change. I can attest to withthe change to my 56 model 230. Quote Link to comment Share on other sites More sharing options...
Mark Haymond Posted August 2, 2013 Report Share Posted August 2, 2013 A-MAZING. I just hurried to the garage to look at the engine I have taken out of my P-15. It is number diamond-P25-star-300170-star so it must be a 230 rather than a 218. I have had that engine 20 years and did not know it was a 230. Thanks guys. Quote Link to comment Share on other sites More sharing options...
Dodgeb4ya Posted August 3, 2013 Report Share Posted August 3, 2013 (edited) There is no diamond before the P25...Guess it's a 217. I went out and measured the stroke at 4-3/8". Bob Edited August 3, 2013 by Dodgeb4ya Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.