After running for several hours, the alarm buzzer sounds and the light comes on. Overheating right?
But I monitor the engine with a laser heat gun. I read the oil filter, mixing elbow, several spots on the heat exchanger and the thermostat housing.
All the readings are close to normal and lower than I have seen in the past when pushing the engine.
If I throttle back to idle, the alarm will stop after a minute or two. I can continue to run for several hours at half throttle with no alarm. I let it cool and throttled up 3 times over a 4 hour period and got the same result each time. Finished the day at half throttle for 2 hours.
So it seems I have an overheating issue but nothing appears overly hot. What gives?
Checked oil level, full. Checked coolant, up to normal level. I tend to think it's on the coolant side.
This is a perkins 4.154. TAD tells me not to overfill the coolant, it will just burp out. I did add extra coolant yesterday and afterwords found some in the collection pan under the engine. Water is coming out the exhaust at the back. But it would be hard to tell if it's the 'normal' amount. Strainer looks clean.
If I picked up growth, barnicles, in the seawater intake, why don't I see any rising temps?
But I monitor the engine with a laser heat gun. I read the oil filter, mixing elbow, several spots on the heat exchanger and the thermostat housing.
All the readings are close to normal and lower than I have seen in the past when pushing the engine.
If I throttle back to idle, the alarm will stop after a minute or two. I can continue to run for several hours at half throttle with no alarm. I let it cool and throttled up 3 times over a 4 hour period and got the same result each time. Finished the day at half throttle for 2 hours.
So it seems I have an overheating issue but nothing appears overly hot. What gives?
Checked oil level, full. Checked coolant, up to normal level. I tend to think it's on the coolant side.
This is a perkins 4.154. TAD tells me not to overfill the coolant, it will just burp out. I did add extra coolant yesterday and afterwords found some in the collection pan under the engine. Water is coming out the exhaust at the back. But it would be hard to tell if it's the 'normal' amount. Strainer looks clean.
If I picked up growth, barnicles, in the seawater intake, why don't I see any rising temps?