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C-9 cooling issues

Yahoo Message Number: 30105
I previously wrote about our 2005 Allure with strange cooling issues which were a mystery to those who tried to resolve them.
The final fix was to tell the local CAT dealer to chanage the two thermostats at my expense, and now all is peaceful. As I understand the configuration, the two units are in parallel in a chamber, with the small one working during warm up, and the other when the engine is close to normal temp.

Best guess is that the small one was sticking and creating the high temps at warm up and driving the sliver leaf and the fan nuts.
The $ 300 was well worth it.

Re: C-9 cooling issues

Reply #1 –
Yahoo Message Number: 30107
The main question remains, or possibly resolved by moving the sensors, is/was the engine and transmission over heating or are the sensors located in a position which give false readings, do the temps always run hotter in these locations?
I've recently had my coach in for the 10k mile service, oil change etc... they also did the recent firm/software update on the C9 (fixed the jerking at low speeds). I asked the tech if the motor reached abnormal temperatures, said they never logged any temps which were considered to high, never met the thresh hold, thinging back what is the thresh hold, what's normal?
Anyway the reason I asked was once last summer I was in Duluth Mn which has some rather steep hills and my readings on both the tranmission and C9 were over 250 degrees according to the analog dash readings.

Mike 06 Inspire

chuckr_34994 wrote:
 

Re: C-9 cooling issues

Reply #2 –
Yahoo Message Number: 30124
I just bought VMSpc and found my analog dash gauges were reading +20 to +25 degrees. Also had those 250 degree readings during climbs, but no over temp condition registered by the ECM. Virtually everyone says the analog gauges dish out bad poop. However a recent post (don't remember the owner) said he installed a separate ground wire on his analog gauges and now they read same as Silverleaf. You might try that if you don't want to add a version of Silverleaf.
VMSpc (minimum expense) is $395 and I thought that a lot to pay just for a little "peace of mind". But I have enjoyed watching all the data points of engine and transmission performance as I drive. So I have no buyers remorse. Of course I am a recovering accountant so data causes strange things to happen in my brain!

Bob Amory

2002 Allure 30760

--- Mike Robertson pcnetmmr@...> wrote:

Quote
The main question remains, or possibly resolved by
moving the sensors, is/was the engine and

transmission over heating or are the sensors located
in a position which give false readings, do the
temps always run hotter in these locations?

I've recently had my coach in for the 10k mile
service, oil change etc... they also did the recent
firm/software update on the C9 (fixed the jerking at
low speeds). I asked the tech if the motor reached
abnormal temperatures, said they never logged any
temps which were considered to high, never met the
thresh hold, thinging back what is the thresh hold,
what's normal?

Anyway the reason I asked was once last summer I
was in Duluth Mn which has some rather steep hills
and my readings on both the tranmission and C9 were
over 250 degrees according to the analog dash
readings.

Mike 06 Inspire

chuckr_34994 c.rudning@...> wrote:

I previously wrote about our 2005 Allure
with strange cooling issues

which were a mystery to those who tried to resolve
them.

The final fix was to tell the local CAT dealer to
chanage the two

thermostats at my expense, and now all is peaceful.
As I understand the

configuration, the two units are in parallel in a
chamber, with the

small one working during warm up, and the other when
the engine is

close to normal temp.

Best guess is that the small one was sticking and
creating the high

temps at warm up and driving the sliver leaf and the
fan nuts.

The $ 300 was well worth it.

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