She's Come Undone, off with her head!

Spent a little time Saturday getting Jennifer's Jag ready for the head to be removed so today was the big day!  What were we going to see?

After removing the cam oil feed line and the 6 nuts at the front of the head that attach it to the timing cover I was ready to undo the head bolts.  Turning the nuts 1/4 turn at a time starting at the center and going out in a centripetal manner the nuts were all removed then expecting a great deal of difficulty started trying to lift the head off.  Much to my surprise it came off relatively easy lifting each end just a bit (to avoid binding) I got it up about an inch and then lifted it off. 

The head and block look to be in very good condition however I think that the coolant leakage was coming from the head gasket as there is 'staining' on either side. 

Cams removed and shims measured 

Tappets and shims laid out in order

Cams

Top of the block after removing the head and studs

Head

Another shot of the head, cleaned up and ready to measure for warpage

Measurement revealed 0.003" 'sag'  and about 0.004" warp in the y-y' plane with a bit less in the x-x' direction.
I think this may be within acceptable limits but will need to do some research

Picture of the cam sprockets showing why they are often replaced,  this version of the sprocket was reportedly prone to failure because of the cut out design.  Earlier and later versions had a solid center piece with more teeth.  I'll try to find a picture of the better ones and post it later.

 At this point I need to do some research and find out what the max. tolerance is for warpage and plan from there.  The head and block look to be in very good condition suggesting that this car received good care over the years with frequent coolant changes.

That's all for now.

Cheers,
Lynn


6 hrs.