Wiring of cylinder head temp. sensor |
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Wiring of cylinder head temp. sensor |
lmcchesney |
Jul 15 2006, 12:23 PM
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#1
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Member Group: Members Posts: 488 Joined: 24-November 03 From: Ocala, Fl. Member No.: 1,381 Region Association: None |
I have a ring cylinder head sensor, the ring type that fits under the spark plug.
I have a VDO cylinder head temp gauge. Two questions: Does the ring fit between the spark plug washer and the cylinder head or bewteen the washer and the spark plug, providing the best seal for the spark plug? What is the wiring of the sensor to gauge? I have two 16ga. wires running from the engine bay, through the central tunnel up to the dashboard. My understanding is that the temp sensor acts as a resitor which varies with the temp. Thus you provide a positive flow through the gauge, to the sensor which grounds out on the engine block. How wrong am I? Thanks, Larry |
Dave_Darling |
Jul 15 2006, 01:18 PM
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#2
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914 Idiot Group: Members Posts: 14,991 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California |
The ring-type sender either replaces the plug washer or goes between it and the head. You just slip the sender over the plug.
That sender (unlike the CHT sender for the EFI) is a thermocouple, so it creates a small voltage difference between the two wires when heat is applied to the sender. Your gauge should have come with wires for the sender. The instructions say not to cut the wires (I'm not sure why). --DD |
type47 |
Jul 15 2006, 01:26 PM
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#3
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Viermeister Group: Members Posts: 4,254 Joined: 7-August 03 From: Vienna, VA Member No.: 994 Region Association: MidAtlantic Region |
Your gauge should have come with wires for the sender. The instructions say not to cut the wires (I'm not sure why). --DD i got the wires for the set up at Lockwood Aviation (? along time ago but ran about $13 if i recall) i think you don't trim the wires as it affects the voltage signal to the gauge. "like" the voltage drop on a 100' extention cord. |
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