Oil Temperature Gauge Inop

[RickyD 0]

I've noticed that my Oil Tempetaure Gauge is INOP. After looking under the bonnet there appears to be a electrical lead with a connector on the end with a melted plug with three spade contacts on it. Would I assume that this the oil temperature connection? Also where would this plug into?

 

I think the reason it's melted is because one of the previous owners has left it loose on the rocker cover.

 

Cheers

 

RickyD

[unariciflocos 49 1 Cars]

THe oil temperature sensor is in the sump, on the back of the engine, facing the bulkhead. I think the wire goes to the brown multiplug under the distributor.

 

Pictures would help.

Edited March 19, 2011 by unariciflocos

[RickyD 0]

Cheers Mate, I will have a look tomorrow and I may have to replace the melted connector.

 

You guy's are a great help to us inexperienced Pug owners

 

Many Thanks

 

RickyD

[j_turnell 137 3 Cars]

The oil temp wire gets fried by the heat from the exhaust over the years, i think the 3 pin plug your refering to is a peugeot diagnositc plug and is not used. The oil temp wire is a single wire, have a look underneath and see, should run down the back of the block to the sensor on the sump from the brown multiplug which is located above the gearbox.

 

It should be a white wire (30A)

Edited March 19, 2011 by j_turnell

[RickyD 0]

The oil temp wire gets fried by the heat from the exhaust over the years, i think the 3 pin plug your refering to is a peugeot diagnositc plug and is not used. The oil temp wire is a single wire, have a look underneath and see, should run down the back of the block to the sensor on the sump from the brown multiplug which is located above the gearbox.

 

It should be a white wire (30A)

 

I had another look last night and the 3-pin plug goes to the bottom of the engine, so that probably explains it, if used as a diagnostics cable.

 

I will check under the sump in the morning.

 

Cheers

 

RickyD

[GLPoomobile 958]

Forget about the 3 pin plug. It confuses most new 205 GTI owners, but as already explained, it's just a diagnostic socket. It should be connected to the crank angle sensor (IIRC) which is on the top of the gearbox right by the engine block (so under the distributor cap). THey are usually melted as they are only loosely clipped to the cam cover, and often come loose and dangle on to the exhaust manifold.

 

Doe your oil temp gauge move at all? You won't notice much movement from it during normal driving. You need sustained high revs to generate enough heat in the oil to get the gauge rising. So cruising at motorway speed in 3rd or 4th (or cruising at illegal speeds in 5th) for a couple of minutes will see it rising.

 

If it's definately not moving, the most likely cause is a broken wire. It'll either have snapped off from the sensor in the back of the sump and be drooping around the back of the engine bay, or it'll be damaged/loose/corroded to f*** where it joins at the brown multiplug on top of the gearbox (or around that area). The plug is a well documented failure point. It carries the wiring for oil temp, water temp sensor (gauge), water temp sender (warning light), starter solonoid, alternator excitor, reverse light switch (I think those are correct off the top of my head). But as it has no provision for moisture protection the wires get badly corroded and brittle. It's a typical first point of investigation for starting problems and charging problems too.

[RickyD 0]

Thanks for you comments GLPoomobile,

 

To be fair the most I've driving the car is a 7 mile round trip and haven't noticed the oil temp gauge reading anything. All the other gauges are working fine.

 

Hopefully a further investigation will reveal all. Unfortunatley I've spent quality time with the family and washed the other halfs C1, therefore I've ran out of time today.

 

Cheers

 

RickyD

[pug_ham 244 3 Cars]

Oil temp will take anything up to 20 minutes of gentle driving to start to register but less if you give it some beans as its warming through.

 

As said though, the wire is often found either broken somewhere in the engine bay or just left disconnected.

 

Its pretty rare for the sender to fail imo.

 

Graham.

[shalmaneser 26]

Mine took a solid 15 minutes to get up to operating temperature, so take it for a good long run and see what happens.

[RickyD 0]

O.K. thanks the advice guys. I'll see if I can take it out for a longer run this week sometime.

 

Many Thanks

 

RickyD

[RickyD 0]

I forgot to mention that after taking the Pug out for a longer run the oil temp gaugr does work.

 

Well that's another jon which I don't have to do.

 

Thanks again for all of you comments.

 

RickyD