Replacing valve guide bushings (Mercedes-Benz S-Class W140)

Non-ferrous metal guide bushing (m104.990 engines of the first version)

Engine valve guide bushing M104.990 (first version). The dimensional characteristics of the bushing are given in Specifications.

Metal-ceramic guide bushing for M104.990 engines (second version) and M104.944/994

Metal-ceramic guide bushing for M104.990 engines (second version) and M104.944/994. The dimensional characteristics of the bushing are given in Specifications.

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The article has been verified: Polyakov Zakhar Grigorievich

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S-Class W140 / Petrol engine V6

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Removal and installation camshafts
Removal and installation the camshaft adjuster
Crankshaft Sprocket — Installation Details
Timing Drive — General Information, Component Maintenance
Removal and installation the timing chain cover

Replacing valve seats
Removal and installation pistons
Replacing piston rings
Checking the condition of the connecting rods
Checking the condition of the crankshaft

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W140 (1991-1998)