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Old 04-26-2005, 08:25 PM   #1
Tim240Z
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Location: LAX area, So Cal
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Mech. Temp tube routing question

I am installing a mech temp gauge in the L31 350 in my truck. Now, in the past I have always mounted these in thermostat housing (old style V8 ). Now, with the newer engines, the sender is in the head, right by the exhaust. Since the copper tubing can't be bent to a hard bend, how close to the header is too close? I think it will end up being between 1/8" to 1/4" away from the primary tube of the header....
Can I swap places with the ECT sensor port, or will that F-up the signal to the PCM (I can't see why, but....). I would prefer to run the mech. gauge, but if necessary I will switch to an electric one......
Any thoughts......
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1972 Suburban C20
454/TH700R4, eaton-corporate 4.10 (looking for 3.7)



Sold: 71 Cheyenne 20
Installed a 99 5.7L L31/4L60E from Suburban 1500 (2005)
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Old 04-26-2005, 11:01 PM   #2
Longhorn Man
its all about the +6 inches
 
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I have always ran the mech. copper deal right by the header....even touching. never seemed to give hot readings...except when I threw the fan belt doin 100...but that's another story all together.
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Old 04-26-2005, 11:10 PM   #3
Tim240Z
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Thanks Man!!! Just what I wanted to know....I was getting a bit worried as my gauge was reading 180 degrees, but the thermometer I had resting on the heater hose fitting was only reading about 150 degrees....but I guess that is a very unscientific test....
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1972 Suburban C20
454/TH700R4, eaton-corporate 4.10 (looking for 3.7)



Sold: 71 Cheyenne 20
Installed a 99 5.7L L31/4L60E from Suburban 1500 (2005)
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