I don’t trust my original coolant temp gauge. I have replaced the temperature switch which is 0-125 degrees. I have a spare VDO 52mm oil temp gauge that is 0-150 degrees. Could I use this for the coolant or would I need a 0-150 switch/sensor? Adam
IF it did I guess that would be ok. I was worried it would show 125 as 150 and therefore throw all the readings out?
No, I don’t think it would because that would mean the calibration from 0-150 is different, I can’t imagine it is. Just your sensor won’t reach 150 if it even wanted too
Is the temp sender matched to the gauge? You should probably compare the resistance of the oil and water temp senders at various temperatures.
Think would read wrong, classic BMC stuff had two types of temp sender, and wouldn't swap. Basically if your sender says 50% then gauge will read 50%, 100% on a 125 gauge would read 150 on a 150 gauge with a or vice versa. Could you swap faces?
That’s what I thought might happen. Unfortunately I can’t swap faces, might be able to find a 150 degree C sensor/switch tho.
yes most likely it'll read incorrect, depends exactly what gauge it is. Usually for 0-150 you fit a white MK1/2 0-150 oil temp sensor in its place you should be ok
what makes you think gauge is incorrect? usually pretty reliable once you've sorted crusty wires, loose joints at the cluster and fitted a proper quality sensor
My temps are reading high and mechanic reckoned it was always a lazy gauge. I thought by wiring in a new one it would ensure I was getting a correct reading. The new sensor was from Heritage made by Meyle.
