RichardS
N/A
I did get quite excited about this, and took this morning off work, to travel to the boat and check that there was sufficient oil in the engine. It was slightly down, consistent with the earlier oil leak. Topped of, cranked lot's of times, compression issues are still there. Damn!
The rocker cover has been removed, timing on all cylinders appears to be correct. The Yard Manager although not an engineer, has far more knowlege and experience than me, thinks every is working as it should, and tappets having the correct clearance. Itw as by watching the valves opening and closing that we established that cyliner 2 had at least some compression.
Although I have not 100% confidentlyidentified TDC for cyl1, by watching the valve timings, and with a thumb over the injection hole feeling for compression, the valve and fuel injection timing appear to be correct, for that cyl at least seems to be correct.
Ont thing that I observed that may not be correct, both the oil dipstick and the air intake, appear to have some gas/smoke coming out of them when the engine is cranked over.
Looks like I am back a square one :-(
The yard are now going to engage a local diesel engineering company to take a look, which hopefully will initially take place on the boat.
I will update the post as soon as I have some news.
The engineer will be very quickly able to run a compression check on each cylinder which will identify where/if there is a compression problem.
The only experience I have with smoke coming out of the air intake is with older petrol engines if I'm setting the ignition timing by ear. If the ignition is advanced too far detonation takes place before the intake valve is fully closed and there is some firing through the intake. I'm not an expert on diesel engines but the equivalent would presumably be the intake valve timing being incorrect, the intake valve being bent/jammed or the intake valve clearance being much too tight.
As you've ruled out the first and the last, we would be stuck with the middle reason .... which is not good news so I'll shut up.
Richard