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-   General Q & A (https://www.offshoreonly.com/forums/general-q-20/)
-   -   Carb HP500 Oil Overheating? (https://www.offshoreonly.com/forums/general-q/254539-carb-hp500-oil-overheating.html)

blue thunder 05-27-2011 07:37 PM
Originally Posted by Poker~N~Run (Post 3414430)
Not engine thermostat people stop saying that. When your ac goes out you don't fix the furnace. OIL Thermostat. And lean wouldn't really do it either only other thing too much timing or dist gear out.
Lean will do it fast. Makes the pistons hot.

Fool Throttle22 05-31-2011 02:02 PM
I'm pretty sure I have a bad gauge or gauge connection. The eng oil seem like it should have got a little burnt or darker color but still looks like honey. I'm going to put a temperature laser on the oil filter and a few other places to confirm.

Budman II 05-31-2011 02:25 PM
Originally Posted by Fool Throttle22 (Post 3416471)
I'm pretty sure I have a bad gauge or gauge connection. The eng oil seem like it should have got a little burnt or darker color but still looks like honey. I'm going to put a temperature laser on the oil filter and a few other places to confirm.
Any chance you could just swap sensors between the engines? Or an easier check might be to swap the wire connections - you could probably fab up a couple of extensions from some wire and solderless terminals. If the other gauge starts reading high, you have isolated your problem to the sender. However, it's unusual for a sender to go bad like that. Laser temp gun might tell you something, but it can give a false reading as well. Maybe you could get a comparative reading between the two engines. Point it at each oil pan, and see if you get a significantly higher reading.

arizonamuscle 07-16-2012 11:34 PM
carb HP500 oil temp very high
 
carb HP500..do these engines come with oil thermostats? if so, where are they located? I have good water temp, good oil pressure, just oi temp goes high quickly, other motors run cool oil temps??

arizonamuscle 07-16-2012 11:36 PM
Originally Posted by Fool Throttle22 (Post 3414244)
Water Presure is at 20psi just like port eng, Water temp is 130 degrees just like Port eng but Oil temp stays at about 220-230 at cruise and got up to 280 at full throttle. I immediately came to idle and it went back down to 220. Port eng never gets above 180 degrees. Where should i start to look for this issue? Sticking Thermostat? Trash clogging water impeller pump? Any help would be appreciated. Also, I just had the oil changed and since it got up to 280, do you think the oil is now bad?

Thanks.
did you ever find your high oil temp issue solution?? I am having the same issue with one of my HP500's

Ran-Dom 32 05-19-2015 12:17 PM
OLD thread... but having similar issue, if the oil t stat sticks closed can someone confirm the oil is not sent through the cooler ? & result in high oil temp?

Unlimited jd 05-19-2015 12:42 PM
Yes and yes, and if you remove it oil dead heads in the cooler. So you have to have a good functioning tstat in that housing.

Eliminator28 05-19-2015 01:07 PM
Originally Posted by unlimited jd (Post 4306294)
yes and yes, and if you remove it oil dead heads in the cooler. So you have to have a good functioning tstat in that housing.
x2.

Ran-Dom 32 05-19-2015 01:15 PM
ok, thanks guys... the t stat had some crud on it, I ordered a new one.. but may not have in time for the weekend , I did clean up the old one & it now expands in a pot of boiling water .. should get me by for now


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