coolant expansion tank level sensor

[jpliddy]

Thanks to all of you when i get chance i will be on this job .
you all make it sound easy so i will attempt it soon
regards jim

[zchael6]

Originally Posted by Rversteeg

For my '98 940LPT I found the screen washer level sensor quite pointless, so I used the wiring for that sensor to connect it to the sensor in the coolant expansion tank (3547710). I put in a new tank complete with this switch fitted, simply took the connector off from the screen washer tank and connected the wiring to the coolant level switch. On low coolant level my orange "screen washer level low" indicator now lights up.
Recently I had the instrument panel out and moved the screen washer indicator wire from connector B pos.10 to connector C pos.10. I now get a red indicator with a radiator symbol lighting up (originally for high engine temp. indicator that is not fitted).

This is a great idea! Is the sensor you are referring to Volvo part 3547710? Is it possible to attach this to the 940 cooling tank? Thanks

[Laird Scooby]

Originally Posted by zchael6

This is a great idea! Is the sensor you are referring to Volvo part 3547710? Is it possible to attach this to the 940 cooling tank? Thanks

Do you have the "torpedo" shaped tank or the later 850 style square tank Will?



If so, the same tank is also used on the later cars with a built in sensor/switch. The problem trying to attach a sensor to a non-sensor tank is sealing it in.

[zchael6]

Originally Posted by Laird Scooby

Do you have the "torpedo" shaped tank or the later 850 style square tank Will?



If so, the same tank is also used on the later cars with a built in sensor/switch. The problem trying to attach a sensor to a non-sensor tank is sealing it in.

Mine is the rectangle one and I had already got a replacement for when I overhaul the coolant system which has the float thing in it I think? It rattles when I shake it. I love the idea of plugging in the screen washer sensor wiring and making that a coolant level monitor

[griston64]

It seems they all have the float but not the sensor

https://www.skandix.de/en/spare-part...olant/1012366/

You can buy that separately but not sure how it fits

[Laird Scooby]

Given the price of the sensor separately, it would probably be cheaper to buy a secondhand tank from a breaker complete with the sensor and cut the wiring loom on the donor car to obtain the plug for it.

[griston64]

Originally Posted by Laird Scooby

Given the price of the sensor separately, it would probably be cheaper to buy a secondhand tank from a breaker complete with the sensor and cut the wiring loom on the donor car to obtain the plug for it.

I'll need to check my 98 Celebration breaker. I removed the tank but don't seem to remember it having a sensor. I have a feeling it only came on 960/V90 so not anywhere near as common in breakers

[griston64]

Here is one with sensor attached https://www.ebay.co.uk/itm/VOLVO-940...kAAOSwt5FbpnpZ

[Laird Scooby]

Originally Posted by griston64

Here is one with sensor attached https://www.ebay.co.uk/itm/VOLVO-940...kAAOSwt5FbpnpZ

I'm sure there's something wrong with the water in Piddlehinton! Everything they sell is overpriced! I remember seeing one item they were selling that was in fact cheaper to buy from Volvo!

[griston64]

Originally Posted by Laird Scooby

I'm sure there's something wrong with the water in Piddlehinton! Everything they sell is overpriced! I remember seeing one item they were selling that was in fact cheaper to buy from Volvo!

Tend to agree with that one Dave ! They were trying to charge £120 for one wing !!

I've got three tanks but none with sensors

PS Got called into office and completely forgot about your arb bushes I've got to go back in tomorrow so will try and remember then