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Re: Duel-Temp-sensor
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CarGuru > Jeep Willys > Re: Duel-Temp-sensor 11 April 2005 09:33:43

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Re: Duel-Temp-sensor

DougW 27 March 2005 19:24:15
 Dirty Ditch Dawg did pass the time by typing:> Mike,Bill, or anybody,> i got myself a machanical temp gauge yesterday,> i have nowhere to mount it,,go figure,> 2.5L 1991 block

Unlike oil pressure, a temp gauge needs flow to work properly. I'm
not sure a T would work for that reason. It would probably create
an air pocket.


This is one aproach that splices into the radiator line.
http://www.mountain­performance.com/imag­es/gauge_water__hose­-800.jpg

--
DougW



Add comment
Mike Romain 27 March 2005 19:38:13 permanent link ]
 Anything that gets above the head is prone to air locking and temp gauge
sensors usually need to be in the head.

Why do you want two temperature gauges anyway?

Why don't you just put a sensor that works for your new gauge in the
proper hole ?

I have a link to the stock ones and what their readings are if this
helps:

http://www.off-road­.com/jeep/tech/elect­rical/gauges/

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

Dirty Ditch Dawg wrote:>
Mike,Bill, or anybody,> i got myself a machanical temp gauge yesterday,> i have nowhere to mount it,,go figure,> 2.5L 1991 block> ,> Bill has mentioned making a "T" where the original sensor is located,>
so im going to make one on my mill for both temp sensors,> heres my question,>
when i mill and tap my adaptor, can i put another small (1/8 04 1/4)> copper line to the thermostat cover(ive a big bolt with a small thread> here) or splice into> the hose that runs into my intake?> my reasoning is this,> it will get a fow of water through the probe-block im making,> ,> but im worried it might disrupt the needed flow through the block> so im looking for opinions,> ,> thanks,> johnp
Add comment
DougW 27 March 2005 19:57:35 permanent link ]
 Dirty Ditch Dawg did pass the time by typing:> Doug,> i want to do the same thing,> only my probe block would attach(intake) to the original hole in the> block that the> original probe went into,> than i want to make an outlet, line to somewhere,> hence the question,> of tapping into the termostat cover or the hose going into my intake,> this i thought would give me a more accurate reading ov my block/water> temp,

I see what your trying to do. That would take a port running to the suction
side to create flow. Is there enough space in the thermostat cover to mill
another probe port?




Add comment
Mike Romain 27 March 2005 20:24:48 permanent link ]
 With all the hundreds of sensors out there why didn't you just get one
to fit the Jeep engine? I also think the stock sensor threads are
larger than you think. Maybe 1/2" with a small nut shape.

The only real safe and accurate place to put a sensor is in the top part
of the head where the most heat seems to be generated. It also tells
you 'fast' if you are air locked because the gauge pins out quick in
steam so you hopeful don't bake a head over an air bubble.

A return line will not work. A top rad hose won't work for the above
head burning reason. Forget the lower rad hose, it is cold already. You
can get 'some' degree of accuracy in the intake manifold's water jacket
because that bypasses the rad, but again you lose the air bubble
safety. Same/worse for in the t-stat cover. The t-stat can stick so
your gauge says all is fine as your engine melts down.

If it was mine, I would just get the correct sensor.... Or maybe try to
tap the head, but......

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

Dirty Ditch Dawg wrote:>
Mike,> my original sensor is only 1/4 wide, screwing into the block,> tiny,,,grrr,> the machanical sensor is 1/2 inch,> the probe wont even get into the block,> ,> and yes on the airlock, thats why i wanted to put in a return line,> to keep the water flowing over the sensor,> i have a drawing of the block im thinking of making if you want a peek,> ,> otherwise i have made up a raidiator hose adaptor for it already,> but wanted to keep it closer to the rear of the block, as im assuming> the temp reading would be more accurate.> ,> johnp> ,
Add comment
L . W . Hughes III 28 March 2005 01:44:07 permanent link ]
 You can bet Autometer or any of the big name manufacturers are
making the sending units as small as possible. Try connect it directly
to the thermostat housing in the stock position, then look for any codes
it throws, that may tell us it also needs the stock (anything in the
ball park sensor) reading.
God Bless America, ßill O|||||||O
mailto:LWHughes3rd@­aol.com http://www.billhugh­es.com/

Dirty Ditch Dawg wrote:>
Mike, or anybody,> i went back to the auto-parts store, they looked in the book,> they cant find a 3/8 sensor,> and yes i took out my sensor, its 3-friggen 8ths,,,FRIG,,,> from what the guy said he couldent even find a3/8ths sensor for an> electrical unit,> ,> im going to contact autometer tommorrow,> but it dont look good,> ,> and im not looking to tap out my block,> this sucks,> ,> johnp
Add comment
Mike Romain 28 March 2005 02:24:24 permanent link ]
 What kind or which model of gauge? Does it have the sealed tube with
the bulb end? If so autometer says it has the bulbs for the 3/8" sensor
holes on the one I looked at, you can just order a different tube.

http://hp.autometer­.com/instructions/00­2432_instruction.pdf­

Mike

Dirty Ditch Dawg wrote:>
Mike, or anybody,> i went back to the auto-parts store, they looked in the book,> they cant find a 3/8 sensor,> and yes i took out my sensor, its 3-friggen 8ths,,,FRIG,,,> from what the guy said he couldent even find a3/8ths sensor for an> electrical unit,> ,> im going to contact autometer tommorrow,> but it dont look good,> ,> and im not looking to tap out my block,> this sucks,> ,> johnp> ,>
Mike Romain wrote:> > With all the hundreds of sensors out there why didn't you just get> one> > to fit the Jeep engine? I also think the stock sensor threads are> > larger than you think. Maybe 1/2" with a small nut shape.> >
Mike> > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00> > 88 Cherokee 235 BFG AT's
Add comment
Mike Romain 28 March 2005 04:03:43 permanent link ]
 You are welcome. Jeep engines are way too common to have to do that
much work just for a mechanical gauge..... My CJ7 came stock with a
mechanical oil gauge. I 'like' that. I can tell when I am down a quart
even, the pressure drops a bit when hot.

Mike

Dirty Ditch Dawg wrote:>
Thanks Mike, i just got back from the auto-parts store again, and after> argueing with him, andf looking in his book, i said the hell with it> and> got the electrical unit, after showing him that it DOES come with the> 3/8 sender,> its she sport-comp series,> with what he had to refund me, i picked up the Volt meter,> im hoping the electrical unit is better than the stock one i have now,> ,> johnp> ,>
Mike Romain wrote:> > What kind or which model of gauge? Does it have the sealed tube> with> > the bulb end? If so autometer says it has the bulbs for the 3/8"> sensor> > holes on the one I looked at, you can just order a different tube.> >
Mike> >
Dirty Ditch Dawg wrote:> > >
Mike, or anybody,> > > i went back to the auto-parts store, they looked in the book,> > > they cant find a 3/8 sensor,> > > and yes i took out my sensor, its 3-friggen 8ths,,,FRIG,,,> > > from what the guy said he couldent even find a3/8ths sensor for an> > > electrical unit,> > > ,> > > im going to contact autometer tommorrow,> > > but it dont look good,> > > ,> > > and im not looking to tap out my block,> > > this sucks,> > > ,> > > johnp> > > ,> > >
Mike Romain wrote:> > > > With all the hundreds of sensors out there why didn't you just> get> > > one> > > > to fit the Jeep engine? I also think the stock sensor threads> are> > > > larger than you think. Maybe 1/2" with a small nut shape.> > > >
Mike> > > > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00> > > > 88 Cherokee 235 BFG AT's
Add comment
Robb S via CarKB.com 11 April 2005 09:33:43 permanent link ]
 hey Mike, I see all kinds of gauges for cj's. Know of any for YJ's Mine's
an 89. I'm not sure on the brand I need..... I am aware that all of these
jeeps seem to have gauge problems. I'm new at this, but it seems that it's
weather related (Moisture). I plan on replacing some, and putting them in
the stock position, but I'm planning on adding others (OIL) because the
stock gauges have made me paranoid. But the best one I did so far, was
remove the cl0ck and replace it with a vacuum gauge....attached it to the
intake.... wanted to do the brake line, but didn't want to add another
potential leak point. anyway, for the dirty ditch dawg, I don't believe
that that small a line would effect the water/temp situation unless you
were low on water. Usually those radiators are oversized. I had mine flow
tested. The guys say it will cool a chevy 350. The thermostat will flow
water accordingly. Like when you remove the thermostat, you can't get the
motor to run at normal temp, always runs cool? Plenty of flow. A 1/4 inch
line is like PI_Sing in the wind.....
good luck
Robb-Seattle WA

--
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CarGuru > Jeep Willys > Re: Duel-Temp-sensor 11 April 2005 09:33:43

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