BobnLesley
Well-Known Member
Having just motored 100+ miles down the coast of Colombia, our engine was running as sweet as the proverbial nut, this morning to express my gratitude I changed gear/engine oils and oil & air filters; re-started and still running sweet as a nut. I stopped the engine to check oil levels were still OK and do a general check over, during which I discovered a split in the waterpump's belt, so changed that and re-tensioned it and the alternator's belt.
That's it, end of my interference; however, when I restarted the engine again, it made an less than happy clattering sound, I stopped it, rechecked things but could see no obvious problem. Having tentatively tried it again I find that above 900-950 rprm (tickover is 850rpm), it runs as sweetly as ever, but below 900rpm it rattles like a bag of hammers; the rattle definitely coming from within the engine rather than transmission or some other ancillary. The only other symptom if you can call it that is that if you add physical weight to the engine (I stood on the heat exchanger to get up into the cockpit) with it running happily at about 950rpm, the clattering begins again.
I can't see that I've done anything to cause the problem and my best guess is that I've perhaps had an engine mounting fail though I can't see/feel a problem with any and a real mechanic pronounced them 'in good order' less thantwo months/50 engine-hours ago. To add to the difficulty, we are out in the boondocks, so to get any spare parts/outside assistance we will almost certainly need to use the engine to get us there.
All advice suggestions would be appreciated.
That's it, end of my interference; however, when I restarted the engine again, it made an less than happy clattering sound, I stopped it, rechecked things but could see no obvious problem. Having tentatively tried it again I find that above 900-950 rprm (tickover is 850rpm), it runs as sweetly as ever, but below 900rpm it rattles like a bag of hammers; the rattle definitely coming from within the engine rather than transmission or some other ancillary. The only other symptom if you can call it that is that if you add physical weight to the engine (I stood on the heat exchanger to get up into the cockpit) with it running happily at about 950rpm, the clattering begins again.
I can't see that I've done anything to cause the problem and my best guess is that I've perhaps had an engine mounting fail though I can't see/feel a problem with any and a real mechanic pronounced them 'in good order' less thantwo months/50 engine-hours ago. To add to the difficulty, we are out in the boondocks, so to get any spare parts/outside assistance we will almost certainly need to use the engine to get us there.
All advice suggestions would be appreciated.
