L98 Sensor Identification
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Joined: May 2015
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L98 Sensor Identification
What are these sensors and connectors, and where do they go?
20160212_210924 by bubbacfcs, on Flickr
Guess I should have taken more pictures when I tore my old engine apart. I did not expect there to be so different sensors with identical electrical connectors.
20160212_210924 by bubbacfcs, on FlickrGuess I should have taken more pictures when I tore my old engine apart. I did not expect there to be so different sensors with identical electrical connectors.
Melting Slicks
Joined: Jun 1999
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From: Ashland Alabama
1 should be the temp gauge sender
3 MAY be the oil temp sensor its hard to tell at that angle or the manifold temp sensor. Again angle is bad.
4 coolant hose from the front of the tpi intake ?
5 is the aux fan switch
6 is the oil pressure sensor and oil pressure switch(fuel pump).
7 coolant hose?
Are any of these pulled from the intake? or just from the block?
3 MAY be the oil temp sensor its hard to tell at that angle or the manifold temp sensor. Again angle is bad.
4 coolant hose from the front of the tpi intake ?
5 is the aux fan switch
6 is the oil pressure sensor and oil pressure switch(fuel pump).
7 coolant hose?
Are any of these pulled from the intake? or just from the block?
Last edited by crowz; Feb 12, 2016 at 10:15 PM.
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From: Anaheim CA
1 - coolant temperature sensor for the dash gauge (goes between spark plugs #6 and #8 on 1986 and later, between spark plugs #1 and #3 on '84 & '85)
2 - oil temperature sensor (goes above oil filter on the side of the block)
3 - cold start thermo switch for cold start injector (goes into the front of the intake manifold)
5 - auxiliary fan switch (goes between spark plugs #1 and #3 on '86 and later, between #6 and #8 on earlier cars)
6 - oil pressure sensor for dash gauge and oil pressure switch for fuel pump (goes in the oil gallery tap on the rear of the block)
4 & 7 look like coolant hose couplers (#4 would go in the front of the intake manifold and connect to the throttle body). I don't recognize #7. Must be for a later year car than I have...
2 - oil temperature sensor (goes above oil filter on the side of the block)
3 - cold start thermo switch for cold start injector (goes into the front of the intake manifold)
5 - auxiliary fan switch (goes between spark plugs #1 and #3 on '86 and later, between #6 and #8 on earlier cars)
6 - oil pressure sensor for dash gauge and oil pressure switch for fuel pump (goes in the oil gallery tap on the rear of the block)
4 & 7 look like coolant hose couplers (#4 would go in the front of the intake manifold and connect to the throttle body). I don't recognize #7. Must be for a later year car than I have...
Last edited by Cliff Harris; Feb 12, 2016 at 11:21 PM.
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I'm with Cliff and Joe here but maybe you're missing one or more if the snapshot was to have been an "all inclusive". You've got those identified I guess.
**Maybe just maybe #4 could be for the oil filter adapter to block coolant passage, in your other snapshots you have a fitting in the front of the intake already with the engine on the ground. Since you seem to have the AUX fan and an '86 the "pair" cooler/fan would have been very likely.
Did you have the oil filter coolant adapter on the L98?
**Maybe just maybe #4 could be for the oil filter adapter to block coolant passage, in your other snapshots you have a fitting in the front of the intake already with the engine on the ground. Since you seem to have the AUX fan and an '86 the "pair" cooler/fan would have been very likely.
Did you have the oil filter coolant adapter on the L98?
Last edited by WVZR-1; Feb 13, 2016 at 08:06 AM.
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Here's another angle on #3, and also two more sensors that I need to identify.
20160213_104308 by bubbacfcs, on Flickr
20160213_104308 by bubbacfcs, on Flickr
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These, #8 and #9 are MAT and CTS, they're the same part # so location of use is not important. CTS - front of intake, MAT - under intake. They're the couple I suspected you hadn't included in the original snapshot.
Last edited by WVZR-1; Feb 13, 2016 at 07:45 PM.
Oil Producer
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joe is right here. it threads into the intake between the front and rear runners on driver side, on the windshield side of the 9th injector if u have one.
Last edited by VikingTrad3r; Feb 13, 2016 at 09:45 PM.