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bad idle when hot C220d 2005

seapcat

New Member
Joined
Jan 14, 2020
Messages
5
Location
Norwich
Car
C220d cdi
When my 2005 C220d cdi gets to 80 degrees temp it idles badly , ok before that and when temp comes down again , still drives ok with no loss of power ???,
 
Remove the dipstick and check the oil condition, also remove oil filler cap, is there any foam or does the oil look ok?
 
no foam , dont have dipstick , u thinking head gasket ?
or cracked head, which would expand when hot opening the crack but cooling down would close it again, but if the oil is ok, coolant ok not loosing any, no steam/water vapour from the exhaust, then hopefully something simpler and cheaper to repair.
 

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