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Author Topic: 2.5TD (BMW Engine) Fan switch location  (Read 8831 times)

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Seth

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Re: 2.5TD (BMW Engine) Fan switch location
« Reply #30 on: 10 August 2009, 20:58:13 »
Quote
mine has no undertray and at around 40 degree in spain, it runs lovely at 90ish, full bore up a long hill with i.c fan on it rises to around 95/96
as sson as i hit the top and back off it comes right back down to normal hope that helps !!

Hang on a min here ........
I've not been aware of my intercooler fan working - will this cause my temp to rise to 100 on long climbs?
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platty

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Re: 2.5TD (BMW Engine) Fan switch location
« Reply #31 on: 11 August 2009, 13:41:07 »
Quote
Quote
mine has no undertray and at around 40 degree in spain, it runs lovely at 90ish, full bore up a long hill with i.c fan on it rises to around 95/96
as sson as i hit the top and back off it comes right back down to normal hope that helps !!

Hang on a min here ........
I've not been aware of my intercooler fan working - will this cause my temp to rise to 100 on long climbs?
Not sure if it will make a huge difference or not...

I removed mine about a year ago because it was seized solid and collecting muck and sh&t which was impeding the flow somewhat. I planned to un-seize it and refit it via a switch. Needless to say this has not happened as yet  :-[
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TheBoy

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Re: 2.5TD (BMW Engine) Fan switch location
« Reply #32 on: 11 August 2009, 20:14:13 »
Quote
Quote
mine has no undertray and at around 40 degree in spain, it runs lovely at 90ish, full bore up a long hill with i.c fan on it rises to around 95/96
as sson as i hit the top and back off it comes right back down to normal hope that helps !!

Hang on a min here ........
I've not been aware of my intercooler fan working - will this cause my temp to rise to 100 on long climbs?
not much difference. Not all TDs have I/C fan either.
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TheBoy

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Re: 2.5TD (BMW Engine) Fan switch location
« Reply #33 on: 11 August 2009, 20:15:58 »
Quote
Quote
Quote
mine has no undertray and at around 40 degree in spain, it runs lovely at 90ish, full bore up a long hill with i.c fan on it rises to around 95/96
as sson as i hit the top and back off it comes right back down to normal hope that helps !!

Hang on a min here ........
I've not been aware of my intercooler fan working - will this cause my temp to rise to 100 on long climbs?
Not sure if it will make a huge difference or not...

I removed mine about a year ago because it was seized solid and collecting muck and sh&t which was impeding the flow somewhat. I planned to un-seize it and refit it via a switch. Needless to say this has not happened as yet  :-[
Get it done.  It makes a noticibly (though not massive) difference :y


Oh yes, this is yet another reason to bin that gay viscous - it allows the leccy fans to come on a bit more (and thus i/c fan), which stops i/c fan seizing all the time
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Spearmint

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Re: 2.5TD (BMW Engine) Fan switch location
« Reply #34 on: 11 August 2009, 21:50:00 »
Ripped the undertray out tonight during an oil change which I couldn't complete as CAS decided to supply me with the wrong oil filter!  >:(

Anyways, once I have fresh oil in her, checked her over and hopefully eliminated my hot running issues I'll test out the removing viscous theory.

The only time these can serve a function really would be too draw air through at a standstill?
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platty

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Re: 2.5TD (BMW Engine) Fan switch location
« Reply #35 on: 12 August 2009, 08:51:54 »
Quote
Ripped the undertray out tonight during an oil change which I couldn't complete as CAS decided to supply me with the wrong oil filter!  >:(

Anyways, once I have fresh oil in her, checked her over and hopefully eliminated my hot running issues I'll test out the removing viscous theory.

The only time these can serve a function really would be too draw air through at a standstill?
The only time they serve any useful purpose is when they are in the bin!  ;D
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Spearmint

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Re: 2.5TD (BMW Engine) Fan switch location
« Reply #36 on: 12 August 2009, 20:16:14 »
Finished the oil change today and then took her for a short drive across town. Temp still reached 90'c but took alot longer to actually get there so I don't know if that is an encouraging result or not.

It'll get a good drive tomorrow so a good chance to check her then.
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TheBoy

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Re: 2.5TD (BMW Engine) Fan switch location
« Reply #37 on: 12 August 2009, 20:17:29 »
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Finished the oil change today and then took her for a short drive across town. Temp still reached 90'c but took alot longer to actually get there so I don't know if that is an encouraging result or not.

It'll get a good drive tomorrow so a good chance to check her then.
Did you use an oil flush?
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Spearmint

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Re: 2.5TD (BMW Engine) Fan switch location
« Reply #38 on: 12 August 2009, 20:52:44 »
Yes, oil flush was used as well. Old oil wasn't anything exciting, no bits etc but obviously needed changing.
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TheBoy

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Re: 2.5TD (BMW Engine) Fan switch location
« Reply #39 on: 12 August 2009, 21:28:13 »
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Yes, oil flush was used as well. Old oil wasn't anything exciting, no bits etc but obviously needed changing.
Good luck :y
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smokingomega

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Re: 2.5TD (BMW Engine) Fan switch location
« Reply #40 on: 12 August 2009, 21:54:58 »
how high does the temp rise?
Its normal for it to rise up hills as the engine is under a lot more load. I tow a caravan and when going up long hills the temp goes right up just below the red but then drops when at the top. when driving solo it just rises slightly.
Have you tried removing the front grill and blowing the radiators out with compressed air?
I`m a hgv mechanic on bin wagons and we have to do this all the time due to dust and small debris that gets stuck in the radiator matrix. If we dont do it as soon as the truck looks at a hill the temp gauge goes into the red.
Hope this helps
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TheBoy

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Re: 2.5TD (BMW Engine) Fan switch location
« Reply #41 on: 12 August 2009, 22:31:35 »
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how high does the temp rise?
Its normal for it to rise up hills as the engine is under a lot more load. I tow a caravan and when going up long hills the temp goes right up just below the red but then drops when at the top. when driving solo it just rises slightly.
Have you tried removing the front grill and blowing the radiators out with compressed air?
I`m a hgv mechanic on bin wagons and we have to do this all the time due to dust and small debris that gets stuck in the radiator matrix. If we dont do it as soon as the truck looks at a hill the temp gauge goes into the red.
Hope this helps
be aware, bmw's stated max 'safe' point is 110C, which is actually 100C on the omega temp gauge...
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Spearmint

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Re: 2.5TD (BMW Engine) Fan switch location
« Reply #42 on: 13 August 2009, 14:34:04 »
Temps still rise to the 95'c mark. It does take a little longer to get there but on my 20 mile run to work it eventually did so.

I suppose I could use an airline at work to blow through the 2 rads. Seems to be a little bit of grass collecting but nothing I would have imagined to cause such a drastic difference.

End of Feb 2009 it wouldn't budge past 80'c. I go abroad for 4 months where the car remained static and I come back to this overheating issue.
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smokingomega

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Re: 2.5TD (BMW Engine) Fan switch location
« Reply #43 on: 13 August 2009, 19:04:09 »
TheBoy,
Am I right in thinking that the red on my gauge is 105 deg c?
In which case is BMW 110? Not too sure what you mean.
Thanks
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TheBoy

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Re: 2.5TD (BMW Engine) Fan switch location
« Reply #44 on: 13 August 2009, 19:35:17 »
Quote
TheBoy,
Am I right in thinking that the red on my gauge is 105 deg c?
In which case is BMW 110? Not too sure what you mean.
Thanks
the gauge on the omega ties severe porkies.

when gauge reads 100c, coolant is actually at 110c.

bmw state the m51tds engine is safe to 110c


bmw engines (all of them) tend to crack heads if they go beyond their safe range
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