Pagoda SL Group

W113 Pagoda SL Group => Drive train, fuel, suspension, steering & brakes => Topic started by: Bill on February 27, 2024, 21:26:21

Title: 280SL rebuilt engine
Post by: Bill on February 27, 2024, 21:26:21

Installed a rebuilt(Robt Fenton)280SE short block engine in my ‘67 230SL, Starts  great and performs great but gets terrible gas Milage…i.e..maybe 12 miles per/gal. What’s happening? Installation done by Silver Star Motors in Sacramento,Ca.

Title: Re: 280SL rebuilt engine
Post by: rwmastel on February 27, 2024, 21:28:12

Was the mechanical fuel pump also rebuilt?

For the less initiated with engine rebuilds, does "short block" mean nothing in the head was rebuilt?  Just worked on everything in the block?

Title: Re: 280SL rebuilt engine
Post by: mdsalemi on February 27, 2024, 22:48:36

Quote from: rwmastel on February 27, 2024, 21:28:12

Was the mechanical fuel pump also rebuilt?

For the less initiated with engine rebuilds, does "short block" mean nothing in the head was rebuilt?  Just worked on everything in the block?

A reasonable explanation:
https://www.motortrend.com/how-to/difference-between-long-and-short-blocks/

Title: Re: 280SL rebuilt engine
Post by: rwmastel on February 27, 2024, 23:34:54

Right, so valve issues may exist that may partially contribute to the poor MPGs.

Title: Re: 280SL rebuilt engine
Post by: Bill on November 16, 2024, 18:37:12

Yah! Head rebuilt too.  New exhaust valves,springs, etc.. Just went thru the injector pump and installed a new “choke”(whatever it’s called) mechanism plus tuned the pump. Appear to have solved the rich mixture issue. Now getting normal milage and the spark plugs are now clean.,