engine temperature

[mderlick]

I own a 41 DC with 653 engines, rebuilt 5 yrs ago, with approx 450 hrs since rebuilding.

Last summer I noticed a temp. variation on stbd. engine. At rpm range 1600-1850 rpm, the temp range is in the 175-180 range. At 2300+ rpm, the temp is showing 180-190.

What could be the cause of the increase in temp. ? Is this dangerous at this temp. range?

Thanks for looking

martin

 

[DCMY #92]

Are these 6V53 naturals or turbo?

 

[Pascal]

I don't know about the 6v53 but 180-190 at 2300rpm (assuming that s the rated rom on a 6v53) is fine. Now if it keeps creeping beyond 190-195 then yes you need to look into it starting with the basic... impeller, clean the raw water side,etc...

 

[mderlick]

Are these 6V53 naturals or turbo?

these engines are naturals....

 

[kelpy]

Pascal is right on. Do not ever ever let them get above 195 deg. Not even for a minute.

 

[DCMY #92]

My 6V53 naturals are regulated at 180. Is this a new condition, or has one engine always differed from the other? If a new condition, I would first check the raw water strainer, if it's unobstructed, service the raw water pump, if it's OK inspect/clean the heat exchanger, if OK test/replace the thermostats (there are two - one on the front end of each exhaust manifold).