Lancia Dedra temperature

If the exhaust smells slightly sweet and has white steam or smoke. The cylinder head gasket is blown . Engine exhaust is entering the coolant under pressure raising the temperature. Some coolant is entering the cylinder and creating the sweet smell and white smoke. Your engine needs the head gaskets replaced immediately! For confirmation of this problem; if you remove the spark plugs, and inspect inside the cylinders, you may find coolant inside one of the cylinders.

If there is no sweet smell and white smoke. The other possibility is the thermostat is stuck closed. Simply replace the thermostat.

Correction to previous post:

Normal coolant temp is 90^oC not 100^oC Sorry.

That sounds perfectly normal to me, whats the Beef?

The car lose power and i can not run more than 130km/h.

You forgot to mention some important details like how many miles you have on the clock for example.

Is it an older model or relatively modern, I do not know this model range at all well!

If you have less than 50,000, then it is unlikely (unless your car also uses a lot of lubricating oil as well) that the cat is blocked. It can happen with cheap/bad fuel,, so do not forget it completely...

Its more likely that something like the air mass sensor is dirty inside, cleaning is sometimes possible if you have a steady and gentle hand.....the wires break easily, so be prepared to buy new again.....

If car has low mileage, this may also indicate a badly seated air cleaner filter or a substantial leak after the filter, or even a completely wrong filter!!! Some filters NOT made or sold by the manufacturer of the car, can be completely wrong, so never ever use air or oil filters NOT bought from Lancia(?) as they may simply be cheap reproductions that will allow your car to be damaged.....the few cents saved are just not worth having!!

(Its the same story with brake parts, after market parts often wear the discs out much faster!!!)

It could also be one of the (some times many) temperature sensors.....that you have as yet not replaced.

It could be an inline fuel filter blocked, possibly inside the petrol tank or a bad fuel pump.....also possibly in the fuel tank.

Some cars have two fuel pumps, one in the tank and one nearer the engine. When one goes wrong, you can get just this symptom!!

If you have an engine management system, get the codes read out by someone, this could possibly indicate which bit is causing the problems.....modern cars have a standard computer interface (at least in Europe), older ones not!!!

I hope this helps further......

Initial thoughts:

I am ot familiar with the particular car but a coolant water temperature of 100^oC is perfectly normal in most road going engines and 100^oC is also nomal for the oil temperature.

Questions:

1. When you dip the oil level is ther any white emulsion on the underside of the filler cap or anywhere else associated with the lubrication system? This can be caused by running the enging too cool or as #2 suggested a blown head gasket.
2. Does the coolant level fall over time i.e., are you loosing coolant? If not then the cooling system does not have any leaks.
3. Assuming the engine has modern fuel injection has the mass flow or inlet air temperature transducer failed. In this situation the engine will continue to work under light load but will run out of power on the open road. Your local motor shop should be able to run diagnosics on the engine and find out what has failed.

All answers were good up to now, surely something is there that helps?

If no evidence of water in oil then suspect plugged cat converter no power to speak of and bad smelling exhaust!

Thank you for your comments.

Up to now I have done all the possible test for inspecting a blown head gasket and I think I don't suffer that. I have no coolant in the oil or oil in the coolant deposit. All sparks are clear. When running the engine on high rpm there is no pressured coolant coming out from the deposit when cap is removed.

What I can suspect up to now after reading your comments is mass flow or inlet air temperature transducer sensor, or the cat converter. Lambda sensor is ok as it has in indicator at the panel.

I will make a check to the entire exhaust system and air sensor.

Thank you.