Introduction | A few pictures | Maintenance | Repaint | Home Page
My CX had a problem with cooling. It would run hot in very warm weather and when driving up long steep climbs. There's a ski resort not far from my home and the altitude up there is 1500m. When driving up there in the summer, the engine would begin overheating half way up. So I had to look into this.
I first checked whether the cooling fans operated properly. The two fans should first come on at half speed, and finally at full speed. Faulty sensors, relays or dodgy connectors could prevent this from happening. But all seemed well electric-wise.
Next, I suspected the insufficient coolant flow through the radiator (this could occur due to internal blockage), or insufficient airflow through the radiator fins (due to accumulated dirt, insects, etc.). So I decided to remove the radiator and clean it really well both internally and externally. The picture shows the Prestige with the cooling system drained, the fans removed and the radiator taken out. The matrix seen on the picture is the air-conditioning condenser.
I cleaned the radiator by hosing the matrix thoroughly with vast quantities of water. This was done several times in both directions. I also flushed and reverse-flushed the radiator with the water hose for lengthy periods of time.
The coolant temperature gauge was not working well; it was basically just randomly jumping up and down, not indicating any reliable value at all. I found out that there was a wrong type of sender installed, and not even connected properly. The wire was touching the ground at random, and therefore the needle was jumping up and down all the time.
So I ordered the correct sender and installed it. This has fixed the problem and the temperature gauge now works correctly. The pictures show the new sender bolted into place.
When ordering the sender, I first went to a Citroen dealer. The price they quoted me was 30 EUR. Next I phoned the generic auto-parts store, which also had a suitable sender for 5 EUR... so I ordered that one. It's manufactured by FAE, who incidentally produce similar stuff (temperature senders, oil pressure switches, thermoswitches etc.) for many car makes.
Their complete catalogue of parts can be downloaded as a PDF file from
http://www.fae.es .
My CX had a very intermittent starting problem. In about one attempt in a hundred, the engine wouldn't start. Such intermittent problems are usually quite difficult to trace because you
can't really be sure that the problem won't happen again after a month or two.
As a precaution, I have replaced the flywheel ignition sensors. The arrows show where these are located.
Later I found out that the feed to one of the ignition coils seemed loose. I fixed that, and so far the starting problem hasn't reoccurred. Still having fingers crossed, though...
That's it for now. I didn't really need to do much else to my CX. It has been really reliable so far. The rest have just been small things like the engine oil and filter changes, replacement of a CV joint gaiter, replacement of the oil pressure switch etc.
Introduction | A few pictures | Maintenance | Repaint | Home Page