Quote:
Originally Posted by 350sdl300sdl
I have attached the pictures from the head removal. The vehicle was sitting about 3 weeks before the head was removed. The head gasket showed no signs of a break or compromised integrity . This worried me greatly, since it narrows the causes down to a possible costly realization.
From the pictures you can see that #4 cylinder is full of antifreeze. Also the valves for that cylinder seem to be cleaner than the rest. Brake cleaner was sprayed on that area to see if any visual cracks were present. Feeling the valve surface it was realized that there was a lip near the outer edge. So it maybe that a head gasket replacement had occurred but the head wasn't serviced. That could explain the poor seal and leaking of coolant. The old owner has passed on, so no one to ask about the service history.
If you look at the exhaust side, you can see 3 of the ports with antifreeze. This makes me feel that the head maybe cracked. I will find out soon enough on the head when the machine shop tests compression.
I havent checked the clearance on the pistons and will be re-buying MB FSM. That should help determine my course of action along with the head status. Any suggestions and interpretations are appreciated.
 |
With all that coolant in the cylinder, it should have hydro locked, unless you just happened to catch it before bending a rod. I also have a few questions about the procedure. Please do not think I am trying to ridicule you by asking them. I am a diagnostic nerd and love the figuring out part only to be confirmed as correct during tear-down.
1) Did you drain the coolant before pulling the head?
2) Did you perform a cooling system pressure test or cylinder leak down test before you pulled the head?
3) Was this engine running when you acquired it?