Tim240z Posted April 27, 2005 Share Posted April 27, 2005 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...... Quote Link to comment Share on other sites More sharing options...
johnc Posted April 27, 2005 Share Posted April 27, 2005 The copper tube should be ok with heat but it might throw off the readings. You can wrap the tube with Fire Sleeve which should reduce the heating of the tube from the header. Quote Link to comment Share on other sites More sharing options...
Pop N Wood Posted April 27, 2005 Share Posted April 27, 2005 "mechanical" temperature gauges are simply thermocouples. Thermocouples are two dissimilar metals in direct contact which produce a voltage that is roughly proportional to the temp. The "gauge" part is just a non-linear voltmeter. So your "mechanical" temp gauge is an electric temp gauge. Quote Link to comment Share on other sites More sharing options...
Tim240z Posted April 27, 2005 Author Share Posted April 27, 2005 Not really.....it carries no current whatsoever. Quote Link to comment Share on other sites More sharing options...
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