Rebuilding the heads
 

These guys are clearly not seating.

http://986forum.com/forums/uploads02...1755144784.jpg

Not surprisingly four of them are bent.

http://986forum.com/forums/uploads02...1755144796.jpg

Luckily the valve guides are not damaged.

http://986forum.com/forums/uploads02...1755144804.jpg

So fresh valves instead of the bent ones should fix it.

http://986forum.com/forums/uploads02...1755144816.jpg

Using some grinding compound to improve seating of the new valves.

http://986forum.com/forums/uploads02...1755144945.jpg

Lapping.

http://986forum.com/forums/uploads02...1755144955.jpg

I had to go back to these ones 2 or three times.

http://986forum.com/forums/uploads02...1755144967.jpg

But finally they were sealing.

http://986forum.com/forums/uploads02...1755144974.jpg

Inspection for potential deterioration/warpage. Measured with the feeler gauge and a straight edge the difference everywhere was lower than 0.03mm. In the shop manual this is exactly the highest tolerated value for a freshly resurfaced head. The tolerance for a used head that you still can put back on is 0.05mm. Great news, no resurfacing needed.

http://986forum.com/forums/uploads02...1755144986.jpg

Coming along.

http://986forum.com/forums/uploads02...1755144998.jpg

Timing, variocam, lifters
 

I took apart, cleaned and reassembled each lifter. I can't stand lifer ticking.

http://986forum.com/forums/uploads02...1755494272.jpg

Soaking overnight in engine oil.

http://986forum.com/forums/uploads02...1755494282.jpg

Back again.

http://986forum.com/forums/uploads02...1755494291.jpg

Variocam teardown.

http://986forum.com/forums/uploads02...1755494316.jpg

New pads and chain.

http://986forum.com/forums/uploads02...1755494336.jpg

Reassembled.

http://986forum.com/forums/uploads02...1755494344.jpg

Setting the timing and camshaft position.

http://986forum.com/forums/uploads02...1755494359.jpg

http://986forum.com/forums/uploads02...1755494370.jpg

http://986forum.com/forums/uploads02...1755494382.jpg

Almost there!

http://986forum.com/forums/uploads02...1755494400.jpg

Interesting project and thank you for posting the progress with images :cool: