JTD Oil Light - Alfa Romeo Forum
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(Post Link) post #1 of 10 Old 24-06-09 Thread Starter
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JTD Oil Light

Hi Forum,

I've got a '51 plate Bravo JTD.

Start the engine and everything seems ok.

After a few minutes on tickover, less when driving, the oil light starts flickering and once the oil temperature rises further it stays on all the time (still on tickover).

Just done an oil and filter change and level is fine.

Take the revs above about 1500 rpm and it goes out.

Questions

1) Do the oil pressure switches on these engines have a reputation for failing?
2) Any other ideas?
3) Where the hell is the oil pressure switch sited as I'm going to try and attach an oil pressure gauge to check the pressure and maybe change the switch.

Cheers for any help
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sorry to say but i think your engine is done when engine oil light goes on that means there is not enough oil pressure in the engine so you should go to the service garage and see what can they do.... but overhauling the engine is 1 way of resolving the issue
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Do you get any smoke from the car and have you checked the oil level?

If the turbo seals fail it can cause low oil pressure and smoke.

I would get the pressure tested correctly though before condemming the engine.
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(Post Link) post #4 of 10 Old 25-06-09 Thread Starter
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JTD Oil Light

Thanks for the responses chaps.

As I said, the oil level is up as I've just done an oil change.

I don't think there's any smoke although its difficult to check while in the drivers seat.

I haven't been driving it so I don't know if it's using any oil either.

Still, can anyone give me a clue where I can hook up a pressure guage?
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When the engine is hot try leaving the car running at idle for around 10-15 mins.

If the turbo seals are failing you will get blue smoke which will dissapear when the engine is revved.
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The oil pump could be worn or end and main bearings knackered. How many miles has it done?
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Do not worry too much,mine starts and ticks over OK most of the time,occasionaly the oil light is slow to go out and I get the low pressure warning up on the screen but only for a split second,if I than drive off and do a hard right hand turn,then the light MAY come on again,by the time it has come up on the screen,it goes away. I suspect an over sensative oil pressure switch.

Mike

Last edited by m0bzy; 25-06-09 at 13:56. Reason: Dunno me left from me right
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(Post Link) post #8 of 10 Old 25-06-09 Thread Starter
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Symonh, ok I'll try that.

Joss, it's done 111,000mls which shouldn't be a great mileage for a diesel.

Yes mobsy I was thinking that but I've not been able to track down the bloody switch location and Fiat service are less than helpful.

I've got over forty years of mending cars and motorbikes but none with this marque and very little with diesels.

I got the car quite cheap so if I can get it fixed without too much expense that would be great as I could then use it to visit my daughter in Liverpool, I live in Watford by the way.
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It really depends on how the turbo has been treated rather than the mileage.

If the car has been run on dirty oil or a previous owner has not allowed the turbo to slow down before switching off the engine then it can cause damage.

Basically if the engine is used hard and switch straight off, or if the engine is revved just before switching off then the turbo can still be spinning when the engine stops. With the engine stopped the turbo shaft will be running in still oil which causes bearing and seal wear.

It happens more on petrol turbos due to the heat they produce, but a modern diesel runs its turbo pretty hard as well.

Giulietta 2.0JTDm (170)
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What oil you put in to it? What viscosity?
Jan
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