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post #1 of (permalink) Old 10-13-2000, 09:42 PM Thread Starter
 
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Where do I install sensor for mech. temp guage

I'm trying to put in my new mechanical guages. The sender/sensor thing for the temp guage is very much bigger than the sensor for the stock unit. Where do I install the sensor?

Sean

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post #2 of (permalink) Old 10-13-2000, 10:31 PM
 
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Re: Where do I install sensor for mech. temp guage

Don't know what engine you have, so I can only help you out with a 258. Under the intake/exhaust manifold, just in front of where the exhaust manifold connects to the pipe, you'll see a pipe plug. That goes into a cooling jacket. Take that out and put your sender in there. Do it with a cold engine because antifreeze is going to pour out, unless you drain it first. You should have gotten some adapter fittings with the sender, eyeball the plug to pick the one that's closest, make sure you have everything ready and go like heck. That's what I did, and then top off the radiator!

Ken

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post #3 of (permalink) Old 10-13-2000, 10:35 PM
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Re: Where do I install sensor for mech. temp guage

1. Drain the coolant down below the upper radiator hose outlet.
2. Remove the the upper radiator hose at the radiator.
3. Drop the Mechanical sensor down into the hose so it rests just above the thermostat.
4. Clean the hose outlet on the radiator.
5. Lay down 2 RTV beads, straight and 1/8" apart so that the sensor capalliary tube can be laid between the beads. This prevents the hose clamp from crushing the capillary tube while the RTV beads deforms and seals.
5. Tie the capillary tube to the passenger side radiator to firewall support strut with tie wraps. Send the tube through the firewall via the ECM wiring harness hole.
6. Replace the hose, taking care of the capillary tube positioning.
7. Tighten the hose clamp and refill the radiator.
8. Warm up the engine and check for leaks... if you've done the job right, there should'nt be any.


Good Jeepin'

Larry
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post #4 of (permalink) Old 10-13-2000, 10:36 PM
 
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Re: Where do I install sensor for mech. temp guage

No one is going to be able to give you a good answer, because you didn't give specifics about engine size.

Generally, you want to use a water jacket that isn't anywhere around the exhaust manifold.
Some engines have water tap bosses (Threaded holes) in the heads on the exhaust side.
These bosses always show the temp 20 to 50 degrees higher than the actual mean temperature of the engine.

You also want to put your temp sensor before the thermostat if at all possible.

"I Have The Body Of A God... Buddha"
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post #5 of (permalink) Old 10-13-2000, 10:48 PM Thread Starter
 
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Re: Where do I install sensor for mech. temp guage

Sorry bout that. It's a 258 engine

Thanks

Sean

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post #6 of (permalink) Old 10-14-2000, 09:29 AM
 
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Re: Where do I install sensor for mech. temp guage

I have a 84 258 cj and would like tr's opinion on where exactly is the best place for it?

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