> I have a larger spread between coolant and oil temperatures than you report.
> I drilled and tapped the oil filter mount plate to accept the oil temperature
> sensor; it senses the oil temp as it leaves the engine enroute to the cooler.
> At 65 MPH/level road/calm wind, the coolant temp is normal at 195F (I use a
> Robertshaw 330 -195 thermostat) but the oil temp readout is 260F.
>
> I have long been concerned that the close proximity of the exhaust manifold
> may be influencing the oil temperature sensor. The clearance between the oil
> filter mount plate where the sensor is located and the exhaust manifold is
> about 1.5 ". The engine is the OEM 403 CID.
>
> I would appreciate your views on my diagnosis. Also, where did you locate
> your oil temperature sensor?
>
> 'Regards,
> Fred Hudspeth
Fred,
You didn't ask for my input, but here it is anyway. I mounted my oil temp sensor
in a "T" right at the oil filter and in the oil line leading from the filter to
the oil cooler in the radiator. I also am concerned about the close proximity to
the exhaust manifold. I have not looked lately but I would guess I have a little
more then the 1.5" clearance that you report on my OEM 455 CID engine.
As I mentioned in an earlier posting my oil temperature seems to run at around
220 at 60 MPH and 250 at 70+ MPH. My water temp ranges from 190 (190 degree
thermostat) at 60 to 210-220 at 70. My fan clutch is suspect so I'm going to be
replacing it soon.
Richard Waters
> I drilled and tapped the oil filter mount plate to accept the oil temperature
> sensor; it senses the oil temp as it leaves the engine enroute to the cooler.
> At 65 MPH/level road/calm wind, the coolant temp is normal at 195F (I use a
> Robertshaw 330 -195 thermostat) but the oil temp readout is 260F.
>
> I have long been concerned that the close proximity of the exhaust manifold
> may be influencing the oil temperature sensor. The clearance between the oil
> filter mount plate where the sensor is located and the exhaust manifold is
> about 1.5 ". The engine is the OEM 403 CID.
>
> I would appreciate your views on my diagnosis. Also, where did you locate
> your oil temperature sensor?
>
> 'Regards,
> Fred Hudspeth
Fred,
You didn't ask for my input, but here it is anyway. I mounted my oil temp sensor
in a "T" right at the oil filter and in the oil line leading from the filter to
the oil cooler in the radiator. I also am concerned about the close proximity to
the exhaust manifold. I have not looked lately but I would guess I have a little
more then the 1.5" clearance that you report on my OEM 455 CID engine.
As I mentioned in an earlier posting my oil temperature seems to run at around
220 at 60 MPH and 250 at 70+ MPH. My water temp ranges from 190 (190 degree
thermostat) at 60 to 210-220 at 70. My fan clutch is suspect so I'm going to be
replacing it soon.
Richard Waters
