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Old 11-07-2012, 04:14 PM
robertobaggio20 robertobaggio20 is offline
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Join Date: Oct 2009
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Originally Posted by 1995i540 View Post
1. Instrument clusters (temp readings) are slow and I would say not very reliable due to lag.

2. In 540I as I can recall you have a switch sensor and coolant sensor in rear and in radiator. All 3 sensors are exposed to coolant.

3. This is pretty simple, take a coolant sensor and splice the wires, all coolant sensors have Ohm spec that represents temperature state once it reaches certain Ohm you can sound the buzzer. I would avoid doing anything directly with cluster because of lag problems.
Yes, splicing the cylinder head sensor's wires are my preferred way to do this too. Checking that out now..

Any good off the shelf solutions ?

And do you know what the actual temp readings on the gauge are in degrees ? Can't seem to find that information....
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