thanks for the input, fellers.

questions:
1. does it matter that the springs on that cylinder look the same as on the others? or that i can see the valve stem inside of them, and what i imagine is the (white?) stem seal the same as on the other cylinders? (see attached photos for a couple different views of the area)

2. can i remove and test the valve spring without having to remove the camshaft housing? and can i remove it without a special spring compressor, magnetic lifter for collets, and the other special tools it says are required in the service manual?

3. is there an easy way to tell if you've got a hole in the piston? or if the valve guide or seat dropped, is there anyway i tell without removing the danged camshaft housing (which sounds like it might be a little out of my league, requiring lots of special tools, etc.)

Attached Thumbnails

   

__________________
-lee
'83 300CDT (286k)

former proud owner of:
'85 mercedes euro 300TD
'80 mercedes 300TD
'77 mercedes 280e
'80 mercedes euro 250
'82 mercedes euro 250