| [GMCnet] WATER IDIOT LIGHT [message #186502] |
Fri, 05 October 2012 20:39  |
larry erd
Messages: 132
Registered: August 2010
Karma: 0
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Senior Member |
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I took the GMC out for a test run today before I drive it 48 miles to
Orlando
Monday to get it painted. I have about 2 miles on the complete rebuild. The
"engine water " idiot light on the dash goes on as soon as you turn on
the key and it stays on. also the temp gauge stays near the C, it didn't
really
move after the engine was warm. I'll replace the temp sensor that is on the
front left side on the intake manifold, But I don't know where the idiot
lite is
getting it's power from. Is it also coming from the same sensor?
Larry Erd
77 ex Kingsley (403)
Lake Wales Fl.
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| Re: [GMCnet] WATER IDIOT LIGHT [message #186528 is a reply to message #186502] |
Sat, 06 October 2012 11:41  |
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Mine used to come on shortly after start up but would go off after running for a while. In my case I found that even though I thought I had the cooling system full I did not. I kept adding coolant to the recovery tank and eventually it did fill up and the indicator no longer comes on. BTW, I never did have a problem with overheating.
Bill Brown - '77 Buckeye Cruiser
Coshocton OH
carguybill@sbcglobal.net
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| Re: [GMCnet] WATER IDIOT LIGHT [message #186620 is a reply to message #186502] |
Sun, 07 October 2012 16:23 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Senior Member |
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Larry,
Congratulations. I'm glad to hear you've finally gotten on the road.
The low water sensor is about half way up the right (passenger) side
radiator tank on the back side -- it's just an insulated probe into to the
tank. It's difficult to gravity-fill the cooling system because of the
HVAC heater core being located several inches above the radiator. Unless
you use a pressure-fill system, as I do, it usually requires 2-3 engine
heat/cool cycles, with refilling of the radiator overflow bottle after each
cool-down, to completely fill the system. That system is completely
independent of the temperature indicator and depends on a small "ice cube"
module under the dash.
The OEM water temperature sender was not well chosen -- it indicates <1/2
scale when normal and 1/2 scale at overheated. Replace it with a sender
which better uses the gauge: go to
http://www.gmcmotorhome.info/engine.html and
scroll down to the "Temperature Sender" topic for a discussion and part
number.
Ken H.
On Fri, Oct 5, 2012 at 9:39 PM, Larry Erd <1ljerd@gmail.com> wrote:
> I took the GMC out for a test run today before I drive it 48 miles to
> Orlando
> Monday to get it painted. I have about 2 miles on the complete rebuild. The
> "engine water " idiot light on the dash goes on as soon as you turn on
> the key and it stays on. also the temp gauge stays near the C, it didn't
> really
> move after the engine was warm. I'll replace the temp sensor that is on the
> front left side on the intake manifold, But I don't know where the idiot
> lite is
> getting it's power from. Is it also coming from the same sensor?
>
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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| Re: [GMCnet] WATER IDIOT LIGHT [message #186635 is a reply to message #186620] |
Sun, 07 October 2012 18:52 |
GMC Cruse
Messages: 606
Registered: June 2009
Location: SE Michigan
Karma: 3
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Senior Member |
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| Ken Henderson wrote on Sun, 07 October 2012 17:23 |
h.
The OEM water temperature sender was not well chosen -- it indicates <1/2
scale when normal and 1/2 scale at overheated. Replace it with a sender
which better uses the gauge: go to
http://www.gmcmotorhome.info/engine.html and
scroll down to the "Temperature Sender" topic for a discussion and part
number.
Ken H.
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I found this cross reference list for the TS6469 mentioned in the topic Ken is referering to:
Manufacturer's Part Listing Cross Reference
Competitor Part Number OEM
AC / DELCO / GM 1513321 OEM
ACCURATE 16004 aftermarket
AIRTEX 1T1053 aftermarket
AUTO-TUNE PT3474 aftermarket
BIG A 20-1005 aftermarket
BORG WARNER WT203 aftermarket
CHRYSLER DR-2500 OEM
COLE HERSEE 84207 aftermarket
ECHLIN TS6469 aftermarket
ETRON TS6 aftermarket
EVERCO H1305 aftermarket
FILKO 2004 aftermarket
GENERAL AUTOMOTIVE SPECIALTY 2600 aftermarket
GP/SORENSEN TSU5 aftermarket
HOLLEY 75-16 aftermarket
KEM TW3 aftermarket
LEECE-NEVILLE 607 aftermarket
MIGHTY 3-1852 aftermarket
MODERN MECHANIC 623-5 aftermarket
MOTORCRAFT SW341 OEM
NAPA TS6469 aftermarket
NIEHOFF DR134A aftermarket
PACE SETTER PT3474 aftermarket
POLLACK TS-10 aftermarket
PRESTOLITE 79-10D aftermarket
SORENSEN TS-4 aftermarket
STANDARD / HYGRADE TS-6 aftermarket
SWITCHES 2450 aftermarket
VALLEY FORGE TS-1 aftermarket
WELLS TU5 aftermarket
ZENITH 3-1852 aftermarket
Mike K.
'75 PB
Southeast Michigan
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