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Old 03-30-2003, 10:09 AM
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tvpierce tvpierce is offline
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Join Date: Feb 2002
Location: Portland, ME
Posts: 612
W201 Crankcase Ventilation

('92 190E/2.3)

I have some oil present on my engine around the valve cover gasket and around the crankcase ventilation lines. While investigating this, I found that if I remove the oil filler cap with the car at idle, oil "spatters" out of the filler hole. Shouldn't there be vacuum present that prevents this?

Further investigation revealed an electrical component that appears to be part of the crankcase ventilation system. It is positioned between the intake ports of cylinders 3 & 4.

So I have 3 questions:

1) How does the crankcase ventilation system work on this car?

2) Is mine working properly?

3) What is that electical component?

Thanks in advance for any insight you can offer.

Jeff Pierce
Jeff Pierce

Current Vehicles:
'92 Mercedes 190E/2.3 (247K miles/my daily driver)
'93 Volvo 940 Turbo Wagon (263K miles/a family truckster with spunk)
'99 Kawasaki Concours
Gravely 8120
Previous Vehicles:
'85 Jeep CJ-7 w/ Fisher plow (226K miles)'93 Volvo 940 Turbo Wagon
'53 Willys-Overland Pickup
'85 Honda 750F Interceptor
'93 Nissan Quest
'89 Toyota Camry Wagon
'89 Dodge Raider
'81 Honda CB 750F Super Sport
'88 Toyota Celica
'95 Toyota Tacoma
'74 Honda CB 550F
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