Not even sure where to start. acquired a 1986 528e a couple years ago. cylinder head was bad so took it all apart replace with a different head which came with camshaft, rocker arms, etc. jump to now....I've almost got it all back together and went to do a valve adjustment and could not get one of the rocker arm eccentrics to close the gap like all the others. so either the valve is stuck and not closing all the was leaving an un-closable gap or something is up with the rocker arm. After looking very closely, i noticed that rocker arm in question had slightly different numbers stamped on ti than all the others. could the mismatch in numbers mean that the one rocker arm is just a little different than the rest?
I feel like i'm going to have take it all back apart to remove the head and either check to see if the valvle is stuck or replace the rocker arm in question. which totally Sucks! the silver lining is that i obviously have all the parts and know how it goes back together now. I feel like the smart, smaller, part of my brain should stop and and just go back but not sure if my rocker arm theory is correct. Anybody know anything about the numbers stamped on the rocker arms?
The pictures below show the numbers stamped on the rocker arms. The first photo shows the number stamped on all the rocker arms that seem to be correct. They have the "8.2" stamped below the part number.
The second photo shows the numbers stamped on the rocker arm in question. Instead of 8.2, it has 2.3 stamped below the product number. Could this be the issue?
