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| Marine CAT 3116 coolant gone |
| Author |
Message |
    
jk higgins
Visitor
| | Posted on Monday, May 22, 2006 - 04:31 pm: | 
|
I have 3116 TC's (fresh water cooled)in my Tollycraft. I noticed unusual steam coming out the back of the boat while at cruise power. The temp indicator indicated 220 so we shut it down to investigate. The coolant was gone. There was no coolant water in the bilge. The oil does not show any signs of water. The heat exchanger has been removed and pressure tests ok. The sea water pump checks OK. The coolant level was checked before operation the day of the event and was full. The engine was operated for less than 30 minutes before the incident occured. Where else can the fresh water coolant be injected into the exhaust system to cause the steam and to lose the coolant? By the way I have two over-temp warning systems, one on the fresh water coolant system and one on the exhaust water discharge system, neither one went off. Seems like a weak link in the warning system. If there is no coolant, then what does the probe measure? The one on the exhaust side is measuring the coolant flow (temperature)of the sea water discharge. Since the sea water pump was ok it did not go off. |
scott stephens
Member
Username: scott_s
Post Number: 40
Registered: 05-2006
| | Posted on Monday, May 22, 2006 - 11:55 pm: |
|
check your turbo. if you find holes in the water jacket, you probably have a leaky exhaust riser. sea water leaks, lays in turbo, and eats hole. usually big hole. can probably test by blowing in one hose blocking other. coolant goes out with exhaust. DONT NEGLECT RISER CHECK. coolant won't eat your turbo. |
Dwight Brooker
Member
Username: sailmaster
Post Number: 6
Registered: 05-2006
| | Posted on Tuesday, May 23, 2006 - 01:43 pm: |
|
Check your head gaskets. If your head gasket is blown your coolant can exit through the exhaust valves, that would explain the steam. |
Darel McCormick
Member
Username: sardog
Post Number: 6
Registered: 02-2006
| | Posted on Tuesday, June 13, 2006 - 04:47 pm: |
|
3116's are NOTORIOUS for cylinder head problems. You probably have a blown head gasket and or cracked cylinder head. Good luck
Darel |
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