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[cem_devecioglu]

As a test, coming home from Lakes meet fully laden with roof box, we decided to do 'the struggle', a section of road traditionally known to stress cars.

No issues, despite it being a hot UK day. Gauge never went over about 97C (prefacelift). Probably about 176k on clock, original rad, and autobox cooler in main rad

my estimation is that your route was not a mountain road uphill so the car can do higher speeds without cooling issues..

[cem_devecioglu]

As a test, coming home from Lakes meet fully laden with roof box, we decided to do 'the struggle', a section of road traditionally known to stress cars.

No issues, despite it being a hot UK day. Gauge never went over about 97C (prefacelift). Probably about 176k on clock, original rad, and autobox cooler in main rad

my estimation is that your route was not a mountain road uphill so the car can do higher speeds without cooling issues..

now called some friends which also used the same route on those mountains.. his car is 2001 bmw 530i.. had the same heating problems when he hammered.. (he is a 35 years old bmw mechanic)

seems like those cold countries produce the cars for themselves only

[TheBoy]

As a test, coming home from Lakes meet fully laden with roof box, we decided to do 'the struggle', a section of road traditionally known to stress cars.

No issues, despite it being a hot UK day. Gauge never went over about 97C (prefacelift). Probably about 176k on clock, original rad, and autobox cooler in main rad

my estimation is that your route was not a mountain road uphill so the car can do higher speeds without cooling issues..

It's a UK mountain pass, only about 3 miles though. Max speed is probably 30mph, due to traffic

[cem_devecioglu]

As a test, coming home from Lakes meet fully laden with roof box, we decided to do 'the struggle', a section of road traditionally known to stress cars.

No issues, despite it being a hot UK day. Gauge never went over about 97C (prefacelift). Probably about 176k on clock, original rad, and autobox cooler in main rad

my estimation is that your route was not a mountain road uphill so the car can do higher speeds without cooling issues..

It's a UK mountain pass, only about 3 miles though. Max speed is probably 30mph, due to traffic

hmmm.. 3 miles , approx. 4 and a half kilometers..  30 mph  approx 45 km/hr..  and traffic.. I dont think you have  chance for spirited driving for long enough :-/

[feeutfo]

Have read on here forced induction is likely to kill the bottom end. Good for 260bhp ish? Tops?

Mv6 v8 was born of a supercharged v6 that failed. Blew the bottom end.

V6 does run hot. 70 degrees considered optimum generally afaik.

[cem_devecioglu]

interestingly Bmw 540 v8 engines also have cooling issues .. and they try interesting ways to solve the problem.. and I'm sure someone can find similiar solutions..

http://forums.bimmerforums.com/forum/showthread.php?t=1636432

[Kevin Wood]

interestingly Bmw 540 v8 engines also have cooling issues .. and they try interesting ways to solve the problem.. and I'm sure someone can find similiar solutions..

http://forums.bimmerforums.com/forum/showthread.php?t=1636432

Ahh, the old "drill some holes in the thermostat" "fix".

[cem_devecioglu]

interestingly Bmw 540 v8 engines also have cooling issues .. and they try interesting ways to solve the problem.. and I'm sure someone can find similiar solutions..

http://forums.bimmerforums.com/forum/showthread.php?t=1636432

Ahh, the old "drill some holes in the thermostat" "fix".

dont know about it.. but obviously there must be ways to solve this cooling problem.. and seriously I dont think GM leave the omega v8 just for cooling issues.. imo if thats the case its really weird for such an old company to give up easily.. :-/

[TheBoy]

As a test, coming home from Lakes meet fully laden with roof box, we decided to do 'the struggle', a section of road traditionally known to stress cars.

No issues, despite it being a hot UK day. Gauge never went over about 97C (prefacelift). Probably about 176k on clock, original rad, and autobox cooler in main rad

my estimation is that your route was not a mountain road uphill so the car can do higher speeds without cooling issues..

It's a UK mountain pass, only about 3 miles though. Max speed is probably 30mph, due to traffic

hmmm.. 3 miles , approx. 4 and a half kilometers..  30 mph  approx 45 km/hr..  and traffic.. I dont think you have  chance for spirited driving for long enough :-/

true, we don't have 'proper' mountains in UK

I did keep leaving gaps, so I could play with rear end traction, much to Mrs TB's annoyance

[Ian_D]

Yes thought cooling would be an issue on the V6.

Remember last year when I towed the caravan to Billing the temp crept up on the hills, so I ended up slowing down to 50mph ish and putting the heater on full (windows wide open! ) AC off. Managed to keep the temp around 3/4 on the gauge (preface dash).

Thought this was a bit high, so tried flushing the radiator (made no difference). So put a new radiator on in the end. I also got the airline out and blasted all the crap out of the AC radiator (airlined it from behind).

This year, the same trip to Billing was better, 65mph up the hills. Caravan loaded, + 2 passengers this time + the car boot was full of the PA system + genny + 5 or 6 car batts! Temp was between 1/2 and 3/4 on the gauge. (Without heater on full blast, and most likely the AC on too).

What is a safe hot running temp for these engines? Are they fine towing uphill with the temp sat at 3/4?

[TheBoy]

I wouldn't like to see it above 100C on the gauge (pre or FL)

[cem_devecioglu]

I wouldn't like to see it above 100C on the gauge (pre or FL)

neither do I , in the middle of nowhere  :-/

[cem_devecioglu]

some question comes to mind.. why they immerse this oil cooler in an already boiling water.. and why not use some place near/behind radiator etc..

[TheBoy]

some question comes to mind.. why they immerse this oil cooler in an already boiling water.. and why not use some place near/behind radiator etc..

kepps eveything at the 'correct' temp

The oil helps heat the coolant during warm up, and coolant cools (without over cooling) the oil in normal use

[Kevin Wood]

some question comes to mind.. why they immerse this oil cooler in an already boiling water.. and why not use some place near/behind radiator etc..

kepps eveything at the 'correct' temp

The oil helps heat the coolant during warm up, and coolant cools (without over cooling) the oil in normal use

Indeed. (Actually, coolant normally heats up quicker than the oil, but it's beneficial to help the oil get to normal temperature ASAP).

If an external oil cooler were used, there would need to be a thermostat to ensure the oil could not be over-cooled. There would also need to be rubber hoses carrying oil forward to the cooler, which would be vulnerable to damage, causing loss of oil pressure and a dead engine.

So, bar the occasional leak due to poor coolant maintenance, the internal oil cooler has far less potential to go wrong.