Td5 coolant temperature switch

Does anyone know where the coolant temperature switch is located on a td5 ? Does the switch on the coolant outlet at the top front of the head control the temperature gauge ? I would like to change it Reason being every time I switch on my lights or ac the temperature gauge jumps past mid way . Thinking the switch is faulty , any help would be appreciated , thanks

Lawrence

lawrencefares said:

Does anyone know where the coolant temperature switch is located on a td5 ? Does the switch on the coolant outlet at the top front of the head control the temperature gauge ? I would like to change it Reason being every time I switch on my lights or ac the temperature gauge jumps past mid way . Thinking the switch is faulty , any help would be appreciated , thanks

Lawrence

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That would be a temperature sending unit,which sends a electric signal to your gauge. should be connectors on it, clean them well and put a little grease on them and see what happens. The sending unit dosen't go bad very often, sound like a connection issue.

Do you where it's located?

lawrencefares said:

Do you where it's located?

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No couldn't find location for you maybe someone with a rave or hains manual could help

Its screwed into the alloy housing that connects the top hose to the block. Its on the turbo side of the engine at the front tucked in behind the coolant pump. Labelled No. 12 in the picture.

Thanks guys I figured out the problem the genius that repaired the vehicle before left the top bolt of the alternator out so every time I switched the ac on the load from the compressor would cause the belt to lose tension and cause slippage on the belt I suppose I replaced the bolt and so far no problems , I guess it's always good to double check work done on your vehicle or do it yourself. Thanks again !!!

For future reference the temp sensor is a logarithmic variable unit. It does not control anything directly but sends a varying signal between approx 3volts and 5volts to the ECU which then drives the temp gauge. However the ECU does not exactly mirror the varying signal from the sensor. It will keep the gauge reading notmal between quite a large range (I'm not sure what the exact figures are) before it shows overheat. Its why the temp gauge always seems to read cold on start up then jump to stay in the same place once the engine is warmed up. Welcome to the digital age.

Thanks for the info ! Do you recommend installing some sort of secondary gauge for safety ?

The TD5 cooling system is over spec. If you were to fit a secondary temp gauge and sender then I'd lay money that it would show your engine runs cooler than you'd expect if everything is in working order.

Thanks again ! Good information