- Aug 24, 2021
- 39
- Boat Info
- 1997 400 sedan bridge
2x Cat 3116
- Engines
- Twin Cat 3116 Turbo Diesels
Hello All
We took a cruise up the lake yesterday on the "Pour Excuse" 97 40' Sedan Bridge. I ran the engines up to 2800 rpms for 3-5 minutes and then continued back to sightseeing at 1400 rpms.
A few minutes later the over-temp alarms went off. As we had never had an alarm go off it took a couple minutes for me to shut down the port engine. We were over 200 degrees on the port engine.
We returned to the slip on the remaining engine until we docked. I ran the port engine long enough to dock the boat. The temp remained bellow 180 degrees.
Doing some investigation :
I checked the strainer and it was clean.(so much for the easy stuff)
Raw water wast running freely from the exhaust
I checked the coolant level it was empty in the overflow and tank.
We restarted the unit and my son noticed red stuff(Cat Coolant) coming out of the exhaust along with the raw water at the start up.
We are not producing smoke of any kind
The oil does not show any sign of coolant contamination.
There is no sign of external leaking in the bilge.
I sure could use some expertise as to where to start on the troubleshooting. I am fairly proficient at wrenching and understand somewhat the cooling system(I think).
Possible Failure points?
Head gasket
Turbo housing
Heat exchanger
Exhaust manifold
I sure could use some help determining what the issue is and how to isolate the issue before I get the checkbook out.
Thank You
We took a cruise up the lake yesterday on the "Pour Excuse" 97 40' Sedan Bridge. I ran the engines up to 2800 rpms for 3-5 minutes and then continued back to sightseeing at 1400 rpms.
A few minutes later the over-temp alarms went off. As we had never had an alarm go off it took a couple minutes for me to shut down the port engine. We were over 200 degrees on the port engine.
We returned to the slip on the remaining engine until we docked. I ran the port engine long enough to dock the boat. The temp remained bellow 180 degrees.
Doing some investigation :
I checked the strainer and it was clean.(so much for the easy stuff)
Raw water wast running freely from the exhaust
I checked the coolant level it was empty in the overflow and tank.
We restarted the unit and my son noticed red stuff(Cat Coolant) coming out of the exhaust along with the raw water at the start up.
We are not producing smoke of any kind
The oil does not show any sign of coolant contamination.
There is no sign of external leaking in the bilge.
I sure could use some expertise as to where to start on the troubleshooting. I am fairly proficient at wrenching and understand somewhat the cooling system(I think).
Possible Failure points?
Head gasket
Turbo housing
Heat exchanger
Exhaust manifold
I sure could use some help determining what the issue is and how to isolate the issue before I get the checkbook out.
Thank You