Moving over from the buying thread (
http://www.peachparts.com/shopforum/showthread.php?t=257294) to the Tech forum.
1991 350SDL 188k, one owner, dealer serviced since new. (The service manager said he had 158 service records for that car, too many to print out for me.)
Lost the drive belt and overheated enough to melt the core of the temp sending unit. It starts and runs fine, it just blows the coolant out the overflow bottle as soon as it starts. No oil in water, or water in oil. No smoke out the tail pipe. Leads me to think head gasket and/or warped head.
I am getting ready to pull the head. I have never done that on this type motor. My biggest concern is maintaining the timing of the crank, injection pump, and cam. I will not be removing the cam from the head. I will zip tie the chain to the cam gear once I get the crank to TDC.
From what I have read I will:
remove the whole chain tensioner assembly from the lower passenger's side.
remove the upper chain guide by pulling the pin (advice on how best to do this?)
I assume the cam gear and chain will pass out the bottom of the chain passageway as the head comes off.
Is it necessary to lock the cam and the injection pump? if so, how?
What is the order for loosening the head bolts?
What else do I need to know to get the head off safely?
Once the head is off I can see if it is worth fixing. I bought it assuming that the motor would need to be replaced with a 603.961 or 617, but I will at least take one run at fixing it before I pull it out.
I already have the intake manifold, fuel lines, and valve cover off.
Thanks,
Greg