Cat Products

[davidboat]

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.

[captjack]

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.

                                                                                             Capt. Jack

[Chuckied]

Before removing the head I would do what cat calls a bottle test. Get a clear bottle and fill it with water take the hose from the expansion tank and put it in the bottle of water and run the engine until it gets good and hot and check for air bubbles, if it has any then remove the head and have it inspected if not then make sure you do not have the coolant to rich, sounds funny but I had the same problem with a cat 3196.

[MarineMech]

If you have 3116 engines, the problem is more then likely the injector tubes.

[Guillaumec84]

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 ???