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Thread: LS3 Coolant Temp Sensors
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10-07-2019 #1Registered User
- Join Date
- Sep 2017
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- 100
LS3 Coolant Temp Sensors
My LA3 has two temp sensor locations, one on the driver side for the computer and one on the passenger side for your gauge. I bought speedhut gauges that come with a temp sensor fitting into an 1/2" NPT adapter (two pieces on the left). These are very standard fittings when installing the sensor in the manifold. The fitting on the left is what threads into the head which is 1/8" NPT. The diameter of the sensor does not fit into the adapter for the LS3. I see three options;
1. Drill out the adapter to allow the sensor to fit.
2. Machine the sensor diameter to fit the adapter.
3. Drill out the head to allow the 1/2" NPT fitting to fit and use the speedhut sensor.
i can tell you that option 1 does not work as I snapped the fitting off inside the head. Good news is I have some easy outs that worked like a charm with no damage to the head or threads.
The ohm rating for the speedhut gauge is 240-33 ohms (140F-280F), which is specific to their gauges just like Autometer has different ohm rating for theirs.
Has as anyone else run across this issue and how did you resolve it. OR, is there a better idea. I'm all ears. Thanks in advance.
perry