Quote:
Originally Posted by latief
I don't know if this applies to the 103, but on the m104, removing the intake first was a huge mistake....having both intake and exhaust manifolds in place during assembly makes placing the head in place correctly a much easier job. it was a pain today without the manifolds because there was nothing to hold-on to while installing the head....
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As far as this job goes, the M104 is a completely different animal.
There are several specifics that one should be aware of when doing a valve job on an M103:
o You should be aware of the torquing procedure for the torque to yield head bolts. Torque to specified value in sequence then angle torque through the sequence. Either mark the bolts with paint or go through the sequence with no interruptions or you will lose your place and not know which bolt has been turned and which one not. Study up on the procedure and eat your Wheaties. I consider myself to be in pretty good physical condition, but this is a work out for me.
o When putting the rocker assembly in place, start all the bolts and then turn them all a turn or so at a time going all around. Tightening any bolt or pair of bolts all the way instead of taking them all down evenly can break the rocker arm assembly.
o Reset the chain tensioner before installation.
Replacing the entire engine in almost all cases is a completely needless thing to do. The bottom ends of these engines are bullet proof. Unless something serious has gone wrong, or it has been SERIOUSLY neglected, the bottom of these engines are probably good for a couple of valve jobs before they need attention.
BTW, don't even DREAM of only replacing the head gasket at this point. Do a thorough valve job replacing valve guides if it is at all necessary. A fresh valve job and tight valve guides will make you think that you put in that new engine.