Engine water & oil temp indication- 90sp36

[williamcharrison]

Merry Christmas and happy New Year to all.

I just had the turbo replaced on my bird and the Cat dealer commented
on the low temp readings after a lengthy test ride. They both read in
the normal range before the work was done -190 to 195 water and ~220
for oil. After the turbo job the water temp would not go above 160
and oil would not go above 190. I assumed bad grounding or a stuck
thermostat and decided to attack the problem in the spring but I just
had to go to the unheated storage area to fire her up and now the
guages do not move at all (tapping does not help) until I shut off the
engine and then they move to just above zero.
I need to know where the temp sending units are located so I can
bypass the wiring to go directly to the guage.

Thanks,

William C. (Chuck) Harrison
90 SP36
Akron, Ohio

[mrdonut12]

Chuck,
Let's try this the easy way first. After the engine has run a
few minutes, put your hand on top of the radiator. If it's warm at
all, the thermostats are sticking open and the engine really IS cold.
This simple, easy test can be done on any liquid-cooled engine
and is very reliable.
The radiator should stay totally cold until the guage approaches
180 degrees.
You can do this test faster than you can find the sending units. :o)
Thermostats generally wear out in 5 years or less.

George Witt (lazy mechanic)
81 FC 35
Lincoln, Nebraska



--- In WanderlodgeForum@yahoogroups.com, "williamcharrison"
wrote:
>
> Merry Christmas and happy New Year to all.
>
> I just had the turbo replaced on my bird and the Cat dealer commented
> on the low temp readings after a lengthy test ride. They both read in
> the normal range before the work was done -190 to 195 water and ~220
> for oil. After the turbo job the water temp would not go above 160
> and oil would not go above 190. I assumed bad grounding or a stuck
> thermostat and decided to attack the problem in the spring but I just
> had to go to the unheated storage area to fire her up and now the
> guages do not move at all (tapping does not help) until I shut off the
> engine and then they move to just above zero.
> I need to know where the temp sending units are located so I can
> bypass the wiring to go directly to the guage.
>
> Thanks,
>
> William C. (Chuck) Harrison
> 90 SP36
> Akron, Ohio
>