28Q29U Plymouth Forum

General Category => General Discussion => Topic started by: Touring29 on March 31, 2023, 03:39:27 PM

Title: Motor 28 or 29?
Post by: Touring29 on March 31, 2023, 03:39:27 PM
The motor I mentioned in the previous post has this #Spare motor number.jpg
It has a 4 1/4" stroke which is correct for a 29. The seller said his car was a 29. I am thinking its a 29 motor made in late 28. I pulled the head and it has no scoring and very little ring groove. I pulled the side cover and its pretty sludged up in there. The bore isn't standard according to a pair of calipers. I'll mic it later to see what it is. I think it was a inframe rebuild. Back then they bored motors with a portable boring bar and never pulled them out of the car.

What do Y'all think?
Title: Re: Motor 28 or 29?
Post by: chetbrz on March 31, 2023, 04:24:42 PM
Definitely a 29U. The 29 U engine started with serial number U999 and ran to U110000

The 28Q was a Maxwell engine.
Title: Re: Motor 28 or 29?
Post by: Russ T. Fender on March 31, 2023, 05:55:18 PM
Looks like you should be able to salvage some waffle washers from that rear end!
Title: Re: Motor 28 or 29?
Post by: Touring29 on April 01, 2023, 12:19:45 AM
Quote from: Russ T. Fender on March 31, 2023, 05:55:18 PMLooks like you should be able to salvage some waffle washers from that rear end!
Yep when we were loading it up my wife said "look waffle washers"! How many women know what a waffle washer is?