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Old 02-18-2006, 02:11 PM
Join Date: Feb 2006
Location: Penticton, BC Canada
Posts: 1
M-B 900 Diesel Quandry

I have a 2003 Freightliner bus in my fleet. It has a M-B 900 series motor. Motor has great power and is matched to an allison auto transmission. It is a great match.

However, cannot get engine up to normal operating temperature. In cold weather, coach is cold. Engine temp will not go over 135-140. I have tried a grill cover. No change. Next venture will be a new thermostat. If that doesn't work; no more suggestions. Have had the engine reprogrammed as well by an MB authorized agency.

On deceleration, downhill, bluesmoke when accelerating after coasting. On fast idle, distinct fuel smell. Suggestions anyone. My technical advisor is scratching his head as well

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Old 02-18-2006, 05:32 PM
t walgamuth's Avatar
Join Date: Apr 2005
Location: Lafayette Indiana
Posts: 36,293
good plan

tstat is first suspect

tom w

[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.
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