Help with m103 rocker arm bearing bracket damage

[knarf]

Greetings Forum Members,



Several months ago the valve train on my 1987 190e 2.6 became very rattlie and the car started running rough.
I'm just now getting around to investigate the sudden onset of the problem.
Today I removed the valve cover and discovered to my supprise that I had 2
loose rocker arm bearing brackets. So loose that the threads in the head were stripped and 5 bolts could not be tightened.
One exhaust valve spring was detached from the valve and the retainer clip could not be found.
A couple valve spring plates and ball sockets appear damaged.
The repair seams to be a straight forward replacement of the damaged parts and helicoiling/rethreading the bolt holes.
Where might obtain the tools to reinstall the valve springs and rethread the bolt holes?
Any advice on this repair job would be most appreciated.

Thanks

Knarf

[stevebfl]

The holes are in an awkward position and getting it right is quite different than most rethreading. The only easy part is that it is aluminum. if a retainer is off I would really be surprized if the valve isn't bent. That of course will change everything.

The tools necessary to do valve guide oil seals are what you will need to reinstall the retainer which is the first thing I would do. To do this requires holding the valves up with air pressure through the spark plug whole. If you can pressurize the cylinder the valves will probably be all right. If you get air out the exhaust pipe - listen for it, the head needs to come off. If that is the case fixing the bolt holes will probably be easier with it off.