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#1
07-10-2001, 11:37 PM
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The head gasget on my 1987 300E suddenly decided to blow. I know of no apparent reason why. Does anyone know if the engine has a steel or an aluminum head?
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Earl  1993 190E 2.3 2000 Toyota 4x4 Tundra 
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#2
07-11-2001, 08:12 AM
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The OM603 engines like yours has an aluminum head, not cast iron.
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MERCEDES Benz Master Guild Technician (6 TIMES) ASE Master Technician Mercedes Benz Star Technician (2 times) 44 years foreign automotive repair 27 Years M.B. Shop foreman (dealer) MB technical information Specialist (15 years) 190E 2.3 16V ITS SCCA race car (sold) 1986 190E 2.3 16V 2.5 (sold) Retired Moderator
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#3
07-12-2001, 07:55 AM
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Are you sure the head gasket blew? Last year, when it appear that I had blown a head gasket, it turned out to be corrosion between water jacket and combustion chamber was the problem.
You won't know for sure until you pull the head off. Best of luck,
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#4
07-12-2001, 09:26 AM
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With due respect to Doc, I'm quite certain that you have an M103 engine in your car, as it's not a diesel automobile. The head of an M103 motor is indeed aluminum.
Do a search-M103 Head Gasket issues have been discussed at length. I suggest that you do a full valve job (if not already done), if the head has to come off anyway.
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"If God had meant for us to walk, why did he give us feet that fit car pedals?" Sir Sterling Moss Michael 2014 E63S Estate 2006 SLK55 1995 E500 1986 Porsche 944 turbo
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