Well we're on our way. Valve cover off, turbo off. Having some difficulty with bolts on the intake. The 3 inside on the middle three cylindes are stuck tight. They are soaking in PB blaster right now (hope it helps).

I am wondering about the Timing Chain. Thank you gxsr for the right up on how to check for stretch. I will do this before I remove the head. My question is how do you remove the chain from the sproket so you can remove the head? There is a funky looking splined nut on the sproket. Is this what needs to come off to take the sproket/Chain off?. What size is this nut? Must be a special socket to use on this.

Once the chain is off and the head bolts removed can the head be pulled up with everything intact ie. cam shaft, valves. What is the best way to release the head from the block? Will it be stuck to the block?

I am hoping to take the complete intact head to the machine shop and have them go over it. Will it cost more if it is not dissassembled?
Thank you for all the help

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1992 300D OM602

Ben