Good News Everyone ! This might be the last blog entry about engine cooling for at least a few weeks ! I know: you’re gonna miss the frequent posts on this really exciting subject. – I too will miss the excursions into the depths of the engine room every morning but it seems that new developments will shift my energy into different areas…
After I did a lot of testing, the final changes I made was to replace two more hoses, clean and polish the old waterpump, getting two new impellers (also for the bilgepumpe !) and finally connecting both pumps in parallel to increase the waterflow through the engine. And it seems to work as during the last test-trip from Savusavu to the Resort, the engine DID NOT overheat ! Ok. I was only putting along with 1500 revs but still. Also one has to take the water temperature into account and that settled at amazing 31˚C (!!) during the last weeks ! With that temperature, all watercooled gadgets will run into slight problems. I borrowed a nice infrared-thermometer from Dieter and now I could verify that the engine indeed doesn’t overheat: After running for one hour, the cylinderhead measured 62˚C and the water coming from the exhaust 52˚C. All good.
And as usual: when one thing is repaired, the next one will break. Our next patient is just beside the engine in the bilge: the watermaker suddenly wouldn’t build up any pressure. I suspected a seized valve which I took out and restored. Then the pre-pumpe wouldn’t start anymore so now I have to figure out how to get all the air out of the system. Well, well… next project.
In the mean time the rainy season went into action and the first cyclone ‘Ian’ (upgraded to category 5) missed Fiji and went over Tonga. Right now the storm is heading south where it will disappear over colder waters. The next one is just about to form in between Vanuatu and New Caledonia while here in Fiji the weather slowly returns to ‘normal’.