WIP: Diagnostic Mode - Updated, Clarified and Simplified

[Wayne2015]

Mine look OK (engine running)??? :shrug,:


7. Coolant temp
Before fan on:







After fan on:







9. Battery charging

[SD1too]

Originally Posted by Wayne2015

Mine look OK (engine running)???

Your battery charging is OK Wayne, but your coolant shouldn't be getting as high as 107°C.

Have you performed the 'demist test' to check your slow speed fan?
Have you got a 2 speed with resistor or a 3 speed system?

Simon

[Wayne2015]

Originally Posted by SD1too

Your battery charging is OK Wayne, but your coolant shouldn't be getting as high as 107°C.

Have you performed the 'demist test' to check your slow speed fan?
Have you got a 2 speed with resistor or a 3 speed system?

Simon

First i got a boot leak (3 days into my ownership)
Now this - argggghhhh!



Thanks Simon
Whats a demist test?

I thought i read that the 2.5 v6 dont have a 2 speed fan - so i have a 3 speed fan?

Or do i need to look thru my front bonnet grille to look for the silver resistor for 2 speed fan (or is that the cabin air vent grille)?

[SD1too]

Originally Posted by Wayne2015

Whats a demist test?

Where have you been Wayne? It's mentioned virtually daily!

1. Start the engine from cold.
2. Press the windscreen demist button on the air con. control panel.
3. Get out of the car and walk to the radiator grille. Is the fan running?

I thought i read that the 2.5 v6 dont have a 2 speed fan - so i have a 3 speed fan?

Early V6 had 3 speed fans, most made after approximately 2002 had 2 speed.

Or do i need to look thru my front bonnet grille to look for the silver resistor for 2 speed fan ..

10/10

Simon

[Wayne2015]

Originally Posted by SD1too

Where have you been Wayne? It's mentioned virtually daily!

1. Start the engine from cold.
2. Press the windscreen demist button on the air con. control panel.
3. Get out of the car and walk to the radiator grille. Is the fan running?

Early V6 had 3 speed fans, most made after approximately 2002 had 2 speed.


10/10

Simon

Thanks Simon!

Will do tomorrow now!

The last i checked the fan was it comes on frequently on, then off, on then off...
Mines 03 reg...

Will report back tomorrow (or tonight)


I was hoping to do the mods one at a time over the year - looks like i need to do em all in one go and ASAP!

[Wayne2015]

OK
I think my 03 MG has the 3 speed fan (no resistor):







OK
With coolant at 107 degrees

With demist test (air con on, engine on, fan kicks in 20sec or so, stops, kick in 20sec, stop,.....)

And no resistor in my fan



1. Does my car have an issue?
2. If so what are options (get new fan)???

[SD1too]

You've lost the slow speed but medium and fast are still working. If you're DIY-minded you can renew the motor brush responsible for beer money, but you must do it soon.

Simon

[Steve42]

Just for your info.
My v6 2.5 auto only has a two speed fan.
Temp is around 90 to 93 when movin
When stopped fan will kick in from around 100c sometimes it's 105c


Steve42

[Wayne2015]

Originally Posted by SD1too

You've lost the slow speed but medium and fast are still working. If you're DIY-minded you can renew the motor brush responsible for beer money, but you must do it soon.

Simon

Deffo not DIY minded!
Will have to take to garage!

Originally Posted by Steve42

Just for your info.
My v6 2.5 auto only has a two speed fan.
Temp is around 90 to 93 when movin
When stopped fan will kick in from around 100c sometimes it's 105c


Steve42

What built date is yours Steve???

Mine is built 15 Dec 2003 - but reg in Jan 2004




So should I take mine to a local garage?
T4 bigRuss (60mins round trip)?
Or Trikey in hull (3 he round trip)?

[SD1too]

Originally Posted by Wayne2015

So should I take mine to a local garage?

Definitely not.

T4 bigRuss (60mins round trip)?
Or Trikey in hull (3 he round trip)?

A much better idea.

Simon