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over heating 406 exec
Posted: Sat Apr 09, 2011 7:10 pm
by ronnyp
I have a 1999 406 Executive 2.0 which keeps over heating. If I'm stood idling the red warning stop light comes on, its ok when I'm running around.I don't seem to be losing any water. Any ideas would be welcome
Re: over heating 406 exec
Posted: Sat Apr 09, 2011 7:11 pm
by Gary406
has the coolant been changed recently ?
what temp is it reaching ?
Re: over heating 406 exec
Posted: Sat Apr 09, 2011 7:29 pm
by steve_earwig
Do the fans work?
Re: over heating 406 exec
Posted: Sat Apr 09, 2011 7:58 pm
by ronnyp
I don't know to be honest as I can't even see them but I do not hear the fan coming on
Re: over heating 406 exec
Posted: Sat Apr 09, 2011 8:03 pm
by ronnyp
I don't know if coolant has been changed as I only got the car a few weeks ago. The temp gauge is showing just under 90 degrees when I'm running around but if I have to do a lot of stop start and using the clutch a lot the gauger goes right over and the red stop light comes on
Re: over heating 406 exec
Posted: Sat Apr 09, 2011 9:42 pm
by lozz
my guess is,
thermostat fubard,
or faulty header tank cap
also check for an airlock,
Re: over heating 406 exec
Posted: Sat Apr 09, 2011 10:03 pm
by ronnyp
Thanks for info, how do I check for airlock
Re: over heating 406 exec
Posted: Sat Apr 09, 2011 10:07 pm
by lozz
ronnyp wrote:Thanks for info, how do I check for airlock
theres a bleed screw on the thermostat housing or there abouts,
and theres one on the heater pipes going into direction of bulkhead,
is your heater blowing out hot constant heat ?
also check the header tank asnt been overfilled,
if itsbeen overfilled it couid cause circulation problems
Re: over heating 406 exec
Posted: Sat Apr 09, 2011 10:13 pm
by Doggy
Fans should be working if it's that hot - (he's saying the temperature's just about OK unless it's stationary).
Re: over heating 406 exec
Posted: Sat Apr 09, 2011 10:20 pm
by lozz
My hdi sits at 90 all day,
ive never seen or heard the fans cut in once,
what temps does other peoples cars get to before fans cut in ?
cheers
Re: over heating 406 exec
Posted: Sun Apr 10, 2011 11:45 am
by teamster1975
The fans should be running at half speed around 90c, you can't really hear them with the engine running but they are on. If one of the fans fail the other will run at full speed all the time. At least on a D8 anyway.
Re: over heating 406 exec
Posted: Sun Apr 10, 2011 12:03 pm
by ronnyp
Thanks for the help, looks like I'll have to wait till I can afford to put it in local garage as I'm disabled and have problems with my hands unless there is some-one local from here who could have a look.
Re: over heating 406 exec
Posted: Sun Apr 10, 2011 1:44 pm
by ronnyp
Been having a look at car 2 things I don't know if relevent.
Top hose is hot temp gauge says about 90 degrees bottom hoses are cold also when I open header tank it is cold. Does all this mean anything
Re: over heating 406 exec
Posted: Sun Apr 10, 2011 1:59 pm
by lozz
couid be air-lock that,
or Thermostat might be stuck closed
other possibilty if not the above 2 :
Water pump
Re: over heating 406 exec
Posted: Sun Apr 10, 2011 7:15 pm
by Gary406
i would get the thermostat changed 1st mate .
whats your postcode. i live wigan lancashire. if i'm free one day this week could pop down and change the thermostat for you .