DAWeeksy Posted December 20, 2017 Share Posted December 20, 2017 I have a all Original 1930 Plymouth U with a Flat 4 196 Cid engine. I have one connecting rod which the rabbit is pretty torn up. Looking for a good used replacement. Any help would be great. Ive attached some pictures for reference. Thanks Dave Link to comment Share on other sites More sharing options...
broker-len Posted December 21, 2017 Share Posted December 21, 2017 buy your picture is seems your crank is in bad shape---------it may tare up a replacement if you find it Link to comment Share on other sites More sharing options...
Taylormade Posted December 21, 2017 Share Posted December 21, 2017 You have several problems here. First, in the very unlikely event that you found a replacement, the Babbitt on the rod will probably not match the circumference of the crank. Your best bet is to have the rod rebabbitted and bored to match the crank. Second, the crank appears to be scored and in poor shape. Based on your picture, I wonder what the rest of the rods and the crank look like. I hate to say it, but I think you're going to have to have the crank turned, have new Babbitt poured in the rods and mains, and have everything line-bored. Anything less and the motor could self-destruct at any time. 1 Link to comment Share on other sites More sharing options...
DAWeeksy Posted December 21, 2017 Author Share Posted December 21, 2017 Thank you for pointing that out. I was also looking at that. Ideally I would have it rebuilt as you said, but that is a significant cost that I'm not sure I'm ready to spend. It's not a show car but I completely understand your point. All of the scoring you see in the picture is mostly superficial I think except one ring which is not ideal. I wiped it off and snapped another picture for you guys to look at. Link to comment Share on other sites More sharing options...
Guest Posted December 21, 2017 Share Posted December 21, 2017 If you mic's the crank you might find a rod that would work for a while but you are looking at a self destructing engine in this condition. You might drive it occasionally for a few miles or a few thousand or it could self destruct in a hundred yards. Then it is a waaaay more expensive to repair. Do it right and do it once. Looks like a great car, Good luck with it. By the way it is a L head four or a flat head four. A flat-four or horizontally opposed-four is a type of four-cylinder engine, a flat engine with four cylinders arranged horizontally in two banks of two cylinders on each side of a central crankcase. Link to comment Share on other sites More sharing options...
Plyroadking Posted December 22, 2017 Share Posted December 22, 2017 My 30U has insert bearings, I've got several spare engines and all of them are also inserts. Link to comment Share on other sites More sharing options...
JACK M Posted December 22, 2017 Share Posted December 22, 2017 19 hours ago, Tinindian said: I like this chart. Link to comment Share on other sites More sharing options...
DFeeney Posted December 26, 2018 Share Posted December 26, 2018 i have a 30-u used short block. All I know is the crank turns. Link to comment Share on other sites More sharing options...
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