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 Re: GM Cleveland Model 248 engines
Author: Rick (---.sonic.net)
Date:   05-16-05 20:19

FYI: Since my original posting I've received the following information.

According to the index page of a WWII GM "restricted" main engine manual: U.S. Navy Contract No.# NOd 1367, NOd 1426, NOd 1487, notes that GM Model 16-248 engines were used on hull numbers SS 212-227, SS 240-252, and SS 265-274. However, while the index page notes those hull numbers, the manual's hard cover notes: SS 212-214, SS 215-226, SS 246-252, SS 265-274 which is a somewhat different group?

It very well may be that this was the original contract and intention but the situation changed operationally as the technology developed with the GM 278As?

Many responses to my postings were varied.

Response: Just a reminder that the 16-248 was being built before and early war. The 16-278a took it's place and was installed on most later boats. Some refits were also done, ie 278's replacing 248's. I'm sure the Cobia SS-245 (a low number for WWII) has 278's and I know Entemedor SS-340 had 16-278a engines. Difference is cubic inch displacement per cylinder, 248 vs. 278. So many parts are not interchangeable. Cylinder heads, valve gear, pumps and coolers probably are.

Response: Further investigation reveals that: SS265-SS274 were GM 248

Response: Manitowoc build boats SS361-SS378 used GM 278A engines.

Response: Fleet boats built by EB had them. Those built by Portsmouth and Mare Island had Fairbanks Morse. I don't know which Manitowoc boats had.

Response: Manitowoc boats had jimmies but I don't know if they were 248s and I haven't had a chance to check "the usual suspects" resources. The first Portmouth Balaos had jimmies.

Response: See here - http://www.subvetpaul.com/Engines.htm

Winton Engine Corp. (later the Cleveland Diesel Engine Division of General Motors): a 12 cylinder, 950 BHP 2 cycle vee, Model 201, with exhaust valves in the cylinder head for uniflow scavenging (i.e., for the scavenging air to flow one way, up the cylinder, rather than across and down, as in a Sulzer). Its unit fuel injectors combined the functions of fuel injection valve and fuel injection pump into one unit in each cylinder, operated by a single cam; and it was the first to use a welded steel housing. The 1,535 BHP 16-248 used larger cylinders at a sharper V-angle, with a stronger crankcase and more reliable pistons and rings. It was superseded by the 1,600 BHP (aluminum pistons) and then 16-278A (steel pistons). After WWII, Cleveland Diesel became The Electro-Motive Division of General Motors.
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 Topics Author  Date
 GM Cleveland Model 248 engines  new
Rick 05-14-05 14:04 
 Re: GM Cleveland Model 248 engines  new
Webmaster 05-16-05 17:14 
 Re: GM Cleveland Model 248 engines  new
Rick 05-16-05 20:19 
 Re: GM Cleveland Model 248 engines  new
Webmaster 05-17-05 18:32 


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