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Old 05-08-2015, 06:02 AM
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Stretch Stretch is offline
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Join Date: Sep 2009
Location: Somewhere in the Netherlands
Posts: 14,461
Any body ever measured hydraulic tappet clearance on a M102/M103?

G'day Folks,

A few people have (rather rudely) asked me if my W201 is a diesel!

I know that that's possible but it has a nice little M102 in there.

I've had a look at the engine and all seems as I remember it before I took it to bits...

...oh dear(!)...

...but I can not help but to wonder if I have the correct height ball socket feet fitted between the hydraulic element and the valve stem. To check this (and the operation / clearance of the hydraulic elements) there's a procedure in chapter 05-214 (in the FSM).

It all looks kind of gucci with a special tool that fits onto the rocker arm =>

102589042100 - only 10 left in the world and costs about 230 euros from the dealer (cheapest price I can find)

I think the special tool essentially is a clamp that is used to compress the top of the hydraulic element.

I was wondering if anyone here has seen or used this special tool.

I was also wondering how loose the rocker arms feel on a M102 / M103 engine with the hydraulic follower touching the lowest part of the cam lobe.
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1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!
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