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M119.980 piston ring replacement problem

jaloliddin

New Member
Joined
Jan 14, 2025
Messages
1
Location
Tashkent, Uzbekistan
Car
1996 W140 S500
Hello everyone, I own a 1996 W140 originally with the M104 engine, in the process of trying to swap a M119 5.0 into my car.

I am having trouble with finding new piston rings for my W140. I am doing an engine rebuild on a M119 5.0 engine with code 119.980. Everywhere I look the dimensions for a piston ring kit is (1.75mm 001IF CRP KV1 / 2.0mm 005IW CR P KV1 / 3.5mm 231 CR P GOE13). I ordered a replacement Goetze piston ring kit (08-182700-00 - Piston Ring Kit) but it doesn't fit. The rings removed from my engine are little bit slimmer and the thickest one is 3mm instead of 3.5mm which is mentioned as the standard size when ordering parts.
I have to admit that my engine comes from a car in Dubai, but the engine is 119.980 so it is the same engine in 1996-1998 W140. What might be the reason that the piston rings with sizes according to spec, doesn't fit my engine? Any ideas would be appreciated.
 

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