Date: Thu, 4 Apr 2002 20:31:43 -0700
Reply-To: Andrew Fox <afox@CNR.COLOSTATE.EDU>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Andrew Fox <afox@CNR.COLOSTATE.EDU>
Subject: Re: Running hot, what can be the matter
In-Reply-To: <191.4ec1e18.29de71ad@aol.com>
Content-Type: TEXT/PLAIN; charset=US-ASCII
> Thanks for the tips. Do I measure resistance by connecting ohmmeter to the
> connector tip of the temp sensor and to ground?
It would be really hard(dangerous) to connect the ohmmeter to the temp
sensor with engine running unless you have a lift. i would start by
checking resistance at the gauge. there is a voltage regulator on the
back of the insturment cluster too that may be causing problems with your
gauges. bentley has a good page and pic of it. its easily and cheaply
replaced. another way to test just the guage is to buy a few resistors
from radio shack (cheap) and fake the resistance going into the gauge and
see how it reacts.
>
> Also, I looked at the connecting wire to the temp sensor, and it looks
> suspect. Do you know if I can test the resistance of the sensor at the
> instrument cluster, so that it will show if there is a wire problem along the
> way?
>
> Thanks for your help.
> Peter
> In a message dated 4/4/02 9:54:36 PM, afox@cnr.colostate.edu writes:
>
> << >
> > high heat problem. Is there a reliable engine heat measurement? Do I swap
> > out temp sensor?
>
> Yes, the way shops measure the temperature is with an infrared
> thermometer. You point it at anything and it gives you its temperature.
> I heard you may be able to buy one at radio shack for $50. Otherwise go
> to a shop where they dont rip people off(very hard to find) and WATCH THEM
> use this tool to see how hot you're really running. Don't swap the temp
> senosr without actally knowing how hot you're running. My experience is
> that the gauge is crap and its probably at fault.
>
> Given that most of your cooling system is new you should not be running
> hot. Read Ben Huot's post earlier today about the cooling system and
> the new VW temp sensor, very interesting. Here are resistance values for
> the temp gauge sensor to see if your gauge is operating incorrectly.
> Don't know if these have changed since VW came out with the new sensor:
>
> 32F 5,000-6,000 Ohms
> 68F 2,000-3,000 Ohms
> 104F 1,000-1,500 Ohms
> 140F 500-675 Ohms
> 176F 275-375 Ohms
> 212F 150-250 Ohms
> >>
>
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