09-09-2009 01:02 PM
I have twin cat 3160s in a 36' Hattaras. The starboard engine has 2500 hours on it and it runs hot at a temperture of 210 degrees
at 8 knots. If I push it any faster it will boil over. The port engine is fine and runs at 180 degrees.
Here is what we have done:
1. Cleaned out the sea strainer
2. Rebuilt raw water pump
3. Put all new hoses
4. Installed new risers
5. Installed new injectors
6 Adjusted valves
7. Had water circulation pump inspected by Cat dealer
8. Installed 2 new thermostats.
9. Replaced radiator cap
10. Rebuilt heat exchanger
11. Removed and inspected port exhaust manifold. (the port side only of the starboard engine overheats)
12. replaced the heat sensor and new gauges.
13. We verified the overheating with a laser thermometer
14. Flushed the system with automobile radiator flush
15. Injected water into the engine and oil cooler and transmission cooler to ensure free flowing water.
Any help would be greatly appreciated.
09-14-2009 03:08 PM
Pull the port head check the head gasket and the head for cracks. The head gasket can allow exhaust gases to blow into the cooling system and cause over heating. If you don't find any cracks in the head have it checked for flatness. A cracked head would probably allow coolant into the cylinder it is affecting but you did not mention that so I would think it is the head gasket and or a head that is not flat. They can leak buy and still not allow coolant in or very little that you would never notice until it gets real bad.
09-16-2009 01:49 PM
12-09-2011 10:32 AM
why the injector tube ??, I have a 35 bertram 1979 with 1990 3116 300 hp cats i just clean ther heat exanger change the stranier did oil, oil filter, fuel filter and water separator filter and still above 2000 rpm the will run 190 and over 2400 rpm 210 i was thinking my thermostat are jam but why would you says the injector tube ???