Hi Volks....
The tech who did the recent install of my rebuilt 2.1 wasserboxer is not at all happy with the coolant gauge.
He installed a new sensor at the same time as the engine. �The old sensor never did work....hardly got out of the cold mark. �With the new sensor the gauge pegs north and the light blinks.....after a very short warm up period. �It shows a voltage drop down to 9.4V; ergo not the 10V it should be. �There is no overheating, the engine temps are perfect per the laser thermal gun.
First thing he did was to replace the cluster voltage stabilizer with one I got from Bus Depot. �No luck. �Same voltage drop.
Then I bought an entire instrument cluster from Jeff on the list, but that gauge does the same thing.
Then he replaced the relay, I think # 3, but that didn't work either. �Oddly enough, when the relay is pulled the gauge still pegs/light blinks.
Next thing, I suppose is to trace the wire all the way back to the sensor. �I think he already replaced the wire from the fuse box to the cluster. �Before he does that he will try another sensor.
Does anyone have any other ideas? �It really is ok now.....engine runs great and doesn't overheat. �But eventually that gauge may be needed to save my rebuilt engine.....especially here in the summer Florida heat.
BTW, the gas gauge reads just a bit low when full (maybe not really full) and the clock and all the lights work fine.
Thanks, Anthony'89 Syncro GL (Hidalgo)