You talk about the plastic fill cap on the radiator and A pipe plug will work in a pinch, but the straight shank plug is available. I can't find or even know what a straight shank plug is...I also got the low hose in the mail today. but it looks short with 2 more small hose coming out of the side. Is this the right hose for the D!? Thanks

 

I removed the plugs to check the condition of #6, due to a P0306 code. Decided to swap it with the #4. Did remove them all to check on them...
Diagnosing the plug what is normal to see? Is some oil to be expected?
Fuel? Obviously coolant is no good...
Pic without the socket on it is from the #6, the other was from #4. Threads on all the plugs had oil on them. cleaned the threads, new anti seize and replaced.
Opinions?

 

sorry, meant to start a new thread...woops. Not sure how to remove it...