Kerry Kukucha
Member II
Hello All & Greetings from the Great White North!
Well here is a twist! Contrary to the usual complaints of a 5432 running too hot, the latest oil analysis I had done back in Sept. indicated that we had an increased soot level & that the engine could be "[FONT=Arial-Narrow+1]AFFECTED BY A/F RATIO, INTAKE RESTRAINT, LOW ENG.TEMP, HIGHER LOADS, OIL DUTY". [/FONT]
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[FONT=Arial-Narrow+1]I am assuming that engine temp is the culprit, insofar as the engine has only been running at 160F, ever since we had the heat exchanger boiled out last summer (brought the previous temp down from 190+ & solved an overheating problem). Am I correct in assuming optimal temp should be around 185F? In reviewing many other posts, the conventional wisdom seems to be that a hotter engine is a happy engine? [/FONT]
[FONT=Arial-Narrow+1]During a 3 week trip in August, where we put on over 100 engine hours (typically at 2200 rpm = 80% of top end) including a 13 hour run with all tanks & the boat fully loaded, as well as running against some challenging tides (running at 2500 rpm), the temp. gage never went beyond 165F! [/FONT]
[FONT=Arial-Narrow+1]I've ordered up a new thermostat in hope that it may increase the running temp, but have been told that the standard Universal thermostat is set at 160F? Does anyone know if there are any after market thermostats available at higher temp settings? Curious side note, the existing thermostat (stamped 160F) has a pair of holes drilled on it's perimeter housing base - mechanic said this might be changing coolant flow & impacting temp?[/FONT]
On the other indicated problem sources per the oil analysis, I'm not sure what an "A/F RAtio" is?
As for "Intake Restraint", my mechanic did provide me with a new air filter (new non-Universal filter foam that replaced the oily original filter foam within the filter housing). I wonder if the KN Air Filter upgrade that Rob Thomas did might have a positive impact?
I would greatly appreciate any & all thoughts, comments & suggestions!
I'd also like to thank everyone here for their great insight & wisdom shared over the past year & extend to all, best wishes for a Happy & Prosperous New Year!
cheers,
[FONT=Arial-Narrow+1]
[/FONT]
Well here is a twist! Contrary to the usual complaints of a 5432 running too hot, the latest oil analysis I had done back in Sept. indicated that we had an increased soot level & that the engine could be "[FONT=Arial-Narrow+1]AFFECTED BY A/F RATIO, INTAKE RESTRAINT, LOW ENG.TEMP, HIGHER LOADS, OIL DUTY". [/FONT]
[FONT=Arial-Narrow+1][/FONT]
[FONT=Arial-Narrow+1]I am assuming that engine temp is the culprit, insofar as the engine has only been running at 160F, ever since we had the heat exchanger boiled out last summer (brought the previous temp down from 190+ & solved an overheating problem). Am I correct in assuming optimal temp should be around 185F? In reviewing many other posts, the conventional wisdom seems to be that a hotter engine is a happy engine? [/FONT]
[FONT=Arial-Narrow+1]During a 3 week trip in August, where we put on over 100 engine hours (typically at 2200 rpm = 80% of top end) including a 13 hour run with all tanks & the boat fully loaded, as well as running against some challenging tides (running at 2500 rpm), the temp. gage never went beyond 165F! [/FONT]
[FONT=Arial-Narrow+1]I've ordered up a new thermostat in hope that it may increase the running temp, but have been told that the standard Universal thermostat is set at 160F? Does anyone know if there are any after market thermostats available at higher temp settings? Curious side note, the existing thermostat (stamped 160F) has a pair of holes drilled on it's perimeter housing base - mechanic said this might be changing coolant flow & impacting temp?[/FONT]
On the other indicated problem sources per the oil analysis, I'm not sure what an "A/F RAtio" is?
As for "Intake Restraint", my mechanic did provide me with a new air filter (new non-Universal filter foam that replaced the oily original filter foam within the filter housing). I wonder if the KN Air Filter upgrade that Rob Thomas did might have a positive impact?
I would greatly appreciate any & all thoughts, comments & suggestions!
I'd also like to thank everyone here for their great insight & wisdom shared over the past year & extend to all, best wishes for a Happy & Prosperous New Year!
cheers,
[FONT=Arial-Narrow+1]
[/FONT]