To cut to the bottom line -- what is the minimum acceptable top temperature rating for hose to be used for a wet diesel exhaust
Last we prettied up our 4JH2E with new hoses, 5 years ago in Australia
, the yard recommended and we accepted "oil suction hose" by an unknown manufacturer. It seems to have held up well for the last 5 years / 3000 engine
hours, in fact looks nearly new and remains flexible. We are now in Malaysia
, again replacing all hoses, and looking at specs a bit more closely. And have not been able to find any true "marine exhaust
hose" here locally.
suction hose is manufactured here in Malaysia
and when other (Aussie) cruisers in the yard ordered it as exhaust hose, we jumped on board. Research
into generic hose of this type showed it should be good up to 100C/210F. After the hose arrived and I could see exactly what I had bought, I looked up the specs and saw that the hose was advertised as good up to 70C / 158F max. Called the factory to make sure the web site was correct, and they curtly said "yep, just 70C."
run to Singapore
we visited a shop where we were told we could get good exhaust hose by the Steyr distributor --long story short, the store told us that their Alfagomma hose is good up to 100C but I have not been able to verify this (no written specs, nothing stamped on the hose).
The only time we've had problems with exhaust hose was with "official" Trident marine
hose -- a bubble developed just before the waterlock. So I don't know that simply spending more money
means more safety