sending unit / pressure switch

pinfold · Post by **pinfold** » Fri Jan 05, 2007 1:43 pm

Happy new year team!

My christmas break was spent overhauling my 16v. wife not very happy!

But i have one last problem to fix!

Oil pressure gauge.

Have tryed two different pods, and both didnt work, so i assume it is the sensor.

Am i correct in saying that it is the sender unit that measures the oil pressure, and the pressure switch that turns the read light on when i have no pressure?

Matt

AlanS · Post by **AlanS** » Sat Jan 06, 2007 12:50 am

I think you'll find the one that reads pressure/level is on the rear of the engine and the one that operates the light is on the front under the intake manifold.
Crappy wiring to both is quite common.

Alan S

Post by **docchevron** » Sat Jan 06, 2007 3:21 am

Er, not quite Alan.
The level sensor is on the back of the engine.
The pressure sensor and pressure switch are next to eachother on the front of the block.
The sensor is the larger of the units, and it's a b&$t&rd to get at without removing the inlet manifold.
You may want to try another piece of wire before condemning the switch though. Just run a piece of cable from the sensor to the dash direct and see if it works.

The pin on the dash is on the white plug on the right hand side of the binnacle (looking at it from the drivers seat) and is the second pin in from the right. Or at least, it is on mine....

Cheers
Chris G

pinfold · Post by **pinfold** » Mon Jan 08, 2007 4:47 pm

Thanks for that chaps , the new wire idea sounds the way forward, especially as i have been quoted £65 + vat for a new sensor.

Strangeley this morning whilst the car was running cold, the gauge was trying to work, not properly, but it rised from nothing and you could see the needle trying to move! but when it warmed up, back to nothing again!

bizar

im sure that citroen have an office of engineers designing these electrical faults into the engines

Matt

Ian_Fearn · Post by **Ian_Fearn** » Mon Jan 08, 2007 5:37 pm

Can you fit an oil temp gauge to a TZD?

DLM · Post by **DLM** » Mon Jan 08, 2007 6:28 pm

As far as I remember, you can only do this if you've fitted the sump from a coolant-and-oil-gauged petrol Gti or 16v. Only these sumps include a threaded orifice for the oil temperature sensor to screw into. I'm very happy to be told otherwise, but that's the way I remember it.

Ian_Fearn · Post by **Ian_Fearn** » Mon Jan 08, 2007 6:35 pm

I've got an aircon sump ready to go on mine....

tom · Post by **tom** » Mon Jan 08, 2007 6:55 pm

You can fit an oil temperature gauge to a TZD as David suggests but you will never need it. By the time the oil overheats, the engine will be long gone.

Stewart (oily!) · Post by **Stewart (oily!)** » Mon Jan 08, 2007 7:04 pm

I had one in my GTI/TD using the sump from a 405 SRI, one thing I found interesting was how long it took for the oil to reach operating temperature compared to the water, ie normal temp after about eight miles, compared to about three for the water.
Stewart

Ian_Fearn · Post by **Ian_Fearn** » Mon Jan 08, 2007 10:08 pm

tom wrote:You can fit an oil temperature gauge to a TZD as David suggests but you will never need it. By the time the oil overheats, the engine will be long gone.

When you put a water temp gauge from a GTi in the job is tidier if you replace the whole unit rather than cutting the gauge fronts. I thought if its a simple job then i'll do it when the sump gets changed over.

AlanS · Post by **AlanS** » Mon Jan 08, 2007 10:33 pm

docchevron1472 wrote:Er, not quite Alan.
The level sensor is on the back of the engine.
The pressure sensor and pressure switch are next to eachother on the front of the block.
The sensor is the larger of the units, and it's a b&$t&rd to get at without removing the inlet manifold.
You may want to try another piece of wire before condemning the switch though. Just run a piece of cable from the sensor to the dash direct and see if it works.

The pin on the dash is on the white plug on the right hand side of the binnacle (looking at it from the drivers seat) and is the second pin in from the right. Or at least, it is on mine....

Cheers
Chris G

Shows you how often I look under the bonnet on mine. I'd forgotten where it was. $\:D/$

Alan S