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[nixoro]

Had the Black omega ticking over last night and the gauge was not doing what it should the car was hitting 90 degrees then sitting there, I left the car running then the fans kicked in when engine was hot.

Any advice would be most appreciated.

Could this be the sender unit knackered that sits behind the dis pack.

[nixoro]

Has anyone else come across this problem before.

Any responses would be most appreciated.

[Marks DTM Calib]

90deg sounds fine.......temp gauge sender, when they fail, normaly gove no reading or full scale.

[nixoro]

Thing is though the fan kicks in when it says 90deg to me thats not right, seems to be cutting in too early or the needles stuck.

Any Ideas, hope this makes more sense.

[Salty]

Not overly familiar with the layout of such thing yet, but the fan start is normally off its own temperature switch mounted usually in the side of the radiator. The engine temp sender is usually mounted by the thermostat. If you water level is low sometimes the engine temp sender is not fully immersed in the water hence a low reading. The fan temp switch is usually half way up the radiator so is always in the water. Engine temp senders usually fail alltogther so that would mean no reading. Dirty connections in the temp sender circuit could cause an error in the reading.  The main thing is the fan cut in which is what will stop the car overheating, engine temperature gauges are not high accuracy devices so you could have a 5 degree error on the gauge.  If the water level in the car is ok don't worry about it.

[nixoro]

Not overly familiar with the layout of such thing yet, but the fan start is normally off its own temperature switch mounted usually in the side of the radiator. The engine temp sender is usually mounted by the thermostat. If you water level is low sometimes the engine temp sender is not fully immersed in the water hence a low reading. The fan temp switch is usually half way up the radiator so is always in the water. Engine temp senders usually fail alltogther so that would mean no reading. Dirty connections in the temp sender circuit could cause an error in the reading.  The main thing is the fan cut in which is what will stop the car overheating, engine temperature gauges are not high accuracy devices so you could have a 5 degree error on the gauge.  If the water level in the car is ok don't worry about it.

Cheers for the response the water level is spot on.

I am guessing this is based on a V6 only mines a 2.0 16v

[Salty]

no problem, the gear they use car temp gauges out of is not super high accuracy stuff it is just good enough for the job it has to do.
Really it is just for indication to show its getting hotter or colder!

[mar892ree]

My 4 pot kicks in at approx 90 -92 and wanders down to about 85 .

Most of the time the temp gauge wil stick  at 85 if i'm on the move.

Start doing side streets and stop starts at junctions etc , then it usually sits at about 90 with fan kicking in and out all the time !!

Mark

[nixoro]

My 4 pot kicks in at approx 90 -92 and wanders down to about 85 .

Most of the time the temp gauge wil stick  at 85 if i'm on the move.

Start doing side streets and stop starts at junctions etc , then it usually sits at about 90 with fan kicking in and out all the time !!

Mark

Its strange because my 97P omega goes upto 97 before fan kicks in where as the 94M in question kicks in alot earlier hence the thread. Shall keep an eye on it see what happens.

Do you think this could be age dependent ie a change between the older and newer models.

[JasonH]

My fan kicks in around 90C (2.5 V6).

[Jay w]

my slow speed fan kicks in about 90 and the fast one at about 95......

From what you are describing it all seems normal, one thing i picked up was how quick the car warms up and the fan kicks in

[Salty]

That's one thing I've noticed, my does warm up quickly and retains heat in the engine bay exceptionally well. Although the good weather may have some bearing on this?