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#1
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OM642 OPERATING TEMP
What is the correct operating temperature for the OM642 engine in 2009 E320? The temp on the dash gauge is 60 to 70C. I am suspecting this is too low.
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#2
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Depends on the ambient temperature
If that was a true reading at say 20 degrees C then I'd say yes too low. If it was -20 C then I'd say put some cardboard in between the grill and the radiator
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1992 W201 190E 1.8 171,000 km - Daily driver 1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone 1965 Land Rover Series 2a Station Wagon CIS recovery therapy! 1961 Volvo PV544 Bare metal rat rod-ish thing I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior Don't leave that there - I'll take it to bits! |
#3
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Thermostat time.
Surprised it’s not throwing a code for that. My three 642s run at 85 to 90 deg C all year round. Although I live in SC where a 30 deg F day is a cold day.
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The OM 642/722.9 powered family Still going strong 2014 ML350 Bluetec (wife's DD) 2013 E350 Bluetec (my DD) both my kids cars went to junkyard in 2023 2008 ML320 CDI (Older son’s DD) fatal transmission failure, water soaked/fried rear SAM, numerous other issues, just too far gone to save (165k miles) 2008 E320 Bluetec (Younger son's DD) injector failed open and diluted oil with diesel, spun main bearings (240k miles) 1998 E300DT sold to TimFreeh 1987 300TD sold to vstech |
#4
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I installed a new thermostat today. I bought a laser thermometer first to verify the actual temperature. Didn't know if I had a thermostat or dash thermometer problem. The dash thermometer is accurate.
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#5
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80-85c
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#6
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Replacing mine tomorrow. It's barely hitting 80C and regens are too frequent. Hope this helps the regen frequency.
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2014 GL450 76K - Wife's DD 2013 GL350 123K - My DD 2002 ML320 300K hard miles (workhorse) 2001 Z3 105K the 4 weeks a year ride 1995 E300D 189K - Rarer ALL options one ortho seats & all Past ones 2015 XC70 2008 V70 2003 XC90 2.9 (POS) 1998 Wrangler (sporting a SBC 388) 1995 E300D 500K - Should have kept it! 1985 E300DT 1984 E300DT-T 1984 240D Gray market |
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