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[chartz]

Thank you  all.
No, the whoosh is awful, I hate it!
My radiator was rinsed when the water pump was changed.
It looks very clean on the outside too (no mush in the tiny holes).
I normally get 92-93 °C all the time, it was just this once it reached a frighteneing 100+ degrees.
A Beemer expert tells me the M51 should ideally work at around 85 °C. What do you think?

[Omegatoy]

doubt your going to get it to un that cool as the std thermostat ist 92!!
 mine without pushing the loud pedal just tootling around runs a tad under the  90 mar accordin to the gauge

[chartz]

So 92 °C is about right then.

[TheBoy]

Hmm, well i reside in Spain where the temps are regularly horrendously hot my TD runs around 94, and the only time i heard the viscous fan cut in was towing the caravan up a tremendous climb of 4 or 5 miles length coming up into Madrid through a place called desperados (where artics can only get up in crawler gear and they have to put thier hazards on whilst climbing as they are grinding up it)
the viscous cut in around 99 and stopped when we got  just over the top, must admit i was worried as its the hardest longest climb in third  gear its ever been asked to carry out, rpm was around 3k and the hill just seemed endless, never heard it on before or since, but regularly hear the low  speed leccy fans when pushing it around the mountains here, am i the only one here with a properly working viscous then?

I never saw mine get anywhere near that hot (once it was fixed).

Even when not running, the viscous still rotates, and thus cools (in traffic).  Not having this does mean the leccy fans come on more often, which is good for the intercooler fan

[TheBoy]

So 92 °C is about right then.

Mid point on the gauge, maybe just a shade under...

[Omegatoy]

Hmm, well i reside in Spain where the temps are regularly horrendously hot my TD runs around 94, and the only time i heard the viscous fan cut in was towing the caravan up a tremendous climb of 4 or 5 miles length coming up into Madrid through a place called desperados (where artics can only get up in crawler gear and they have to put thier hazards on whilst climbing as they are grinding up it)
the viscous cut in around 99 and stopped when we got  just over the top, must admit i was worried as its the hardest longest climb in third  gear its ever been asked to carry out, rpm was around 3k and the hill just seemed endless, never heard it on before or since, but regularly hear the low  speed leccy fans when pushing it around the mountains here, am i the only one here with a properly working viscous then?

I never saw mine get anywhere near that hot (once it was fixed).

Even when not running, the viscous still rotates, and thus cools (in traffic).  Not having this does mean the leccy fans come on more often, which is good for the intercooler fan

forgot to say i turned the intercooler fan on at the bottom of the hill knowing it was going to be a hard climb, never seen mine get anywhere near that since, however the van and enough equip to survive 6months oin it meant it weighed around 2 ton!!!
So car was working very hard for its living!!!!!

[chartz]

Ah yes, I had switched the aircon off before the climb, to see how the car behaved. On my Miggy, switching on the aircon triggers all three electric (sorry, leccy) fans by the way.

[Pitchfork]

Ah yes, I had switched the aircon off before the climb, to see how the car behaved. On my Miggy, switching on the aircon triggers all three electric (sorry, leccy) fans by the way.

I dream of Aircon!

[platty]

I dream of Aircon!

Same here, it has never worked in 2 yrs of ownership! Hardly worth it for the crappy summers we are subjected to  

[Pitchfork]

I dream of Aircon!

Same here, it has never worked in 2 yrs of ownership! Hardly worth it for the crappy summers we are subjected to  

At least you've got it
I'm in the cheap seats!

[TheBoy]

Ah yes, I had switched the aircon off before the climb, to see how the car behaved. On my Miggy, switching on the aircon triggers all three electric (sorry, leccy) fans by the way.

I dream of Aircon!

LOL, me too, mine is piss poor currently. Bet its the original gas in there (11yrs)

[chartz]

Well, my viscous fan doesn't work properly, but as a trade-off (?) the air conditioning works just fine!

Please moderator, could you correct  "viscose fan" to "viscous fan"?

[TheBoy]

Well, my viscous fan doesn't work properly, but as a trade-off (?) the air conditioning works just fine!

Please moderator, could you correct  "viscose fan" to "viscous fan"?

That means going through 71 posts and modifying...   ...this software doesn't have a single title for each thread. I'll mod the original post.

[chartz]

Yes, that's what I actually meant! Thanks.

[chartz]

Hello everyone,

I've just got back from the south (of France) so that's about 1000 km worth of motorway (and it doesn't come cheap!). I had no problem with my Omega, but from time to time the temp would almost reach 100 °C (steep slopes, 25 °C air). Otherwise it stayed at 92.5 °C—that is most of the time.
I still can't make up my mind: should I bear the awful fan noise or just leave it that way (in the boot)? How will this affect the health of the engine in the long run?
Also the radiator seems evenly hot on its whole surface, but could it be silted up nonetheless, which would explain the temp rise?
Visually, the water looks very pure to me (yellow Opel stuff).

I don't have a clue, really.

Advice appreciated, thanks.