Allan, Don't have my Bentley around but the head sensor dose not ring a bell with me! But you could be right, others can verify for us. I don't recall anything about head temps, I figured the LED was just to catch your eye to get you to look at a gauge. We all know that gauge will mean nothing if you don't look! Shawn > -----Original Message----- > From: Allan Streib > [mailto:streib@cs.indiana.edu] > Sent: Sunday, December 02, 2007 9:39 > PM > To: robert feller > Cc: vanagon@GERRY.VANAGON.COM > Subject: Re: New thermostat funky? > > I thought there were two senders for > the gauge -- one in the water > for the actual meter, the other in the > cylinder head to light the LED > when a overtemperature condition > occurred. > > The problem with putting the > temperature sender in the water is of > course that if you lose your water you > also have lost what you are > measuring. I guess that's what the > blinking "low coolant" LED is for... > > Am I thinking of a different engine > that had the two sensors? If not > would there be a way to retrofit a > cylinder head temperature sensor? > > Allan > > On Dec 2, 2007, at 8:44 PM, robert > feller wrote: > > > I respect Scott's comment but i will > decent on this one. > > > > We went the 100% crazy route when we > thought my gauge was reading > > high (7/8) > > and sometimes red light on warm > days. New sensor, stat, radiator, > > wiring > > check, voltage stabilizer/reguator > ect. Finally got the infered gun > > and > > compared locations and temps to my > buddies 2.1L and we took exact temp > > readings but our gauges showed > different data. it's hard to say > > what is > > "dead on" with these gauges. I did > tons of research with Bentley, > > VDO and VW > > tech manuals trying to figure out > all Ohm readings for a given > > temp. Lot of > > work and poor data out there to find > that different resources gave > > slightly > > different Ohm readings for arbitrary > gauge readings. I've got the > > sources > > for those interested. > > > > Combine this to a gauge that reacts > wide and slow due to the > > radiator being > > so far forward and I've never been a > huge fan of the temp gauge on > > these > > things for the often OVERCOOLED > vanagon engine. > > > > |
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