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Old 09-08-2006, 02:25 PM
rsd rsd is offline
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Join Date: Sep 2006
Posts: 17
OM621 cold start problem

Hi all
I have a question to the respectable members of this form.
I recently bought an old 1967 200D diesel OM621 diesel , about a year ago . to make long story short the engine is supposed to be about 60K miles (I can't verify this but prev. owner claims the car been parked in his neighbor's backyard for more than 20 years ).
I've managed to drive my 200D for about 7000 miles so far,once she started she runs good , smooth idle, does her 80 miles per hour, 30-32 miles per gallon ,45 psi oil pressure, compression test approx. 3 month ago seems like all 4 cylinders give more than 300 psi ..
my question regarding cold start; seems like it is quite hard to start the engine up sometimes the start is relatively easy , just 2-3 cranks after long preheat , but sometimes it doesn't want to start at all and only after long cranking with starting fluid eventually and a lot of frustration it starts... (now she is doesn't want to start without starting fluid at all)
for example I could start this car during the day without problem now lets say she is parked for 2-3 days so it is almost impossible to start after that. but the hot engine starts up right away...
seems I've checked that ever I could , all the lines , changed filters. tried to run her from the small fuel container in the engine compartment instead of fuel tank, valves adjusted, serial glow plugs changed 4 month ago , no any difference in cold start whatsoever
every new day is a big puzzle: cold start or not to start at all.
I realize this is a 40 y.o car .. I don't mind working on such a dinosaur diesel so any advice would be greatly appreciated
Thanks for all the inputs
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