Ford Focus 1800cc Zetec - Overheating engine - IJG18

After 11years and 93,000 miles decided to have the cam belt, water pump, all belts, tensioners and pulleys replaced, including new anti freeze.

No problems before work done by local mechanic who has worked on the car the last 7 years.

Since the work has been completed the engine runs very hot. The top of the engine, all hoses are very hot to touch. The engine compartment is very hot.

After a few minutes the temp gauge reaches the mid point and does not move. There are no leaks to oil or water. Although the water level has gone down a little (I think to boiling rather than a leak). The hoses are all hot either side of the rad. At standstill and reving the engine the fans cut in for a minute and then go off again. If still reving the fans continue to cut in and out, but the temp gauge does not move. The exhaust is just about warm on tick over until the engine is reved then it is also hot as the revs push out the gases.

The car heater is extremely hot after a few minutes and is of a very dry overheated quality? The thermostat must be opening and the temp sensor is sending a signal to switch the fans on and off.

As you walk past the front of the car you can feel the heat radiated and smell that the hoses are very hot. There isnt a burning smell-yet!!

The car revs and accelerates okay, it is just over hot for some reason. It wasnt like this prior to the work done ??? Worried the car will set on fire or sieze the engine!!!

Any ideas anyone ???

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Ford Focus 1800cc Zetec - Overheating engine - mss1tw
You sound quite mechanically minded yourself, or at least with some awareness of how the car should be, so I hope I'm not teaching you to suck eggs if I mention it sounds like a classic air lock/cooling system not bled of air properly.
Ford Focus 1800cc Zetec - Overheating engine - thunderbird

Did you study the car as closely as this before the work was done.

Engines do get hot.

Your temp gauge appears to be working normally, if it overheats it will immediately shoot into the red.

If top and bottom hoses are both hot water is circulating.

The fan appears to be working normally.

Exhausts do get hot when the engine is running.

The quality of the air coming out of the heater cannot be affected by the engine, its fresh air that passes through the heater matrix.

These engines do not suffer from airlocks, Ford designed it well.

If you are still worried get the thermostat changed and also get someone who knows Focus's to check the mechanic has reconnected the hoses correctly, the bypass circuit is especially critical.

What does your mechanic say.

Ford Focus 1800cc Zetec - Overheating engine - unthrottled

What he said.

If the old coolant hadn't been changed for a long time you might find that the cooling system is working much more effectively than they did before, so the engine bay and heater seem hotter than it did previously.

Does a cool heat sink prove that the heat sink works well-or not at all?!

similarly, a new exhaust always feels hotter to the touch than an old one because the clean metal surface can conduct heat more effectively than a fouled one.

Edited by unthrottled on 09/09/2013 at 17:20

Ford Focus 1800cc Zetec - Overheating engine - Collos25

The temp sensor if its in air and not fluid due to an air lock will read low .

Ford Focus 1800cc Zetec - Overheating engine - Cyd

I'm having a hard time discerning any problem from reading the OP.

If I run my Saab out for about 8 miles (moderately briskly) you wouldn't even want to attempt to touch the tailpipe - it'd strip the skin off your fingers in a flash. And opening the bonnet releases a torrent of heat fit to shame a flammenwerfer. In normal driving the coolant temp varies between 90 and 105C (ECU values)

My Rover turbo was much the same.

You sure it hasn't just been restored to how it should be?

Could the smell be spilt antifreeze burning off?

Ford Focus 1800cc Zetec - Overheating engine - Simon
So the temperature gauge reads normal, the hoses and heater are all hot, the fan cuts in and out as it should - To me it sounds like it is all working fine!
Ford Focus 1800cc Zetec - Overheating engine - jc2

Sounds like your fitter sorted out a problem you did not know you had!!

Ford Focus 1800cc Zetec - Overheating engine - Terminator-17

The low-speed fan cut-in coolant temp on that engine is 119C. (The CHT sensor will be reading 140C+ by then.) It will feel hot.

You have described a working system; nothing there is abnormal.