Thanks Dennis.

I was supspicious when the FLAPS guy *inferred* that the "Hastings"
gauge I bought, could be used with the VW sensor.

FWIW, other Jetta engine conversion people, AFAIK, there isn't a hole
on the head or elsewhere to thread the supplied sensor that c/w the
aftermarket gauge.

If need be, I will pull the VW ECT sensor, heat it up in water with
aftermarket gauge attached, and cross check it with a thermometer to
get a *rough* idea of what the difference is. Failing that, maybe
there's a local supplier than can sell me a gauge that is meant to
work with the VW part.

Cheers,

Neil.

--
Neil Nicholson '81 JettaWesty "Jaco
http://groups.google.com/group/vanagons-with-vw-inline-4-cylinder-gas-engines
http://web.mac.com/tubaneil
http://tubaneil.googlepages.com/

On Mon, Jul 7, 2008 at 10:13 AM, Dennis Haynes <d23haynes57@hotmail.com> wrote:
> After market gauges need to be used with the sender that came with them or
> is specified for them. They are not interchangable with even US OEM sensors.
> Not only are the calibrations differenet but some even use sensors that wor
> in oppositie directions. For example, the ECU sensor you are using is a
> reverse device with resistance that decreases as temparature increases. many
> after market gauges, are reversed.
>
> Dennis
>
>
>> From: neil N <musomuso@GMAIL.COM>
>> Reply-To: neil N <musomuso@GMAIL.COM>
>> To: vanagon@GERRY.VANAGON.COM
>> Subject: Re: Purpose of "Voltage Stabilizer" in Instrument cluster?
>> Date: Mon, 7 Jul 2008 08:11:00 -0700
>>
>> I too was curious about exactly how to use an IR gun.
>>
>> I think it would give a fairly accurate reading of the head temp though.
>>
>> And speaking of senders, I'm *not* using the sender that came with the
>> new Hastings gauge I bought. The gauge is connected to the "gauge"
>> side of the ECT sensor (it has 2 parts. 1 for ECU, the other for the
>> gauge)
>>
>> I know there is a part that can be put in a rad hose, in line. It has
>> a threaded hole for an aftermarket sensor.
>>
>> Neil.
>>
>>
>> On Mon, Jul 7, 2008 at 7:37 AM, Max Wellhouse <dimwittedmoose@cfu.net>
>> wrote:
>> ..... > Although these readings are to the extreme ends of
>> > the scale, I have often wondered how accurate the readings are in
>> > automotive usage.  If you aim the beam at a radiator hose, I'm sure
>> > it's giving you an accurate reading on the rubber hose temp. but
>> > wouldn't the coolant inside the hose be even hotter(at operating
>> > temperature anyway)?  I believe the gun has uses for comparative
>> > temp. values like checking the difference in areas of a radiator and
>> > the hoses before and after the thermostat, but I fail to see how we
>> > can say for sure that a temp gauge is inaccurate when we're not
>> > measuring the actual coolant.  My water temp VDO gauge reads high
>> > because I have a 150C gauge and I'm pretty sure I have a 250F sending
>> > unit.