Over cooling?

[AG Tuscan II S]

Car was running at about 60 degrees down the motorway.
Pulled the thermostat and swapped it for an 82 genuine discovery unit - it had a 72 in there.

Now the car runs at an indicated 71 - 73 on the motorway with the oil about the same. (big imporovement) How come?
The thermostat is an 82 degree unit - I think that means the wax pellet will be completely melted (not completly sure what the rating means) at 82 degrees.
Surely this means the thing should reach more than 70 odd, before the stat starts to open?

More questions...

I think I read somewhere that the readout in the car is not accurate - is that true?
I wonder also why the header and pipe to the rad on the hot side seem to warm up pretty much as the engine does. All this leads me to suspect another design gem from blackpool in the thermostat housing.

[glow worm]

Must say I've never quite got the oil cooler ... Using water to cool oil seems a good idea, but my water is for most of the time (unless both very hot in traffic) 10 degrees hotter than my oil... So unless there's a temperature differential after flowing through the radiator that lowers temperature of the water in the cooler, it's usually warming my oil... ... Or am I a bit thick , probably.

[330p4]

Keith the oil warm up time on the SP6 engine cars is a pain in the a**e the reason isa the oil cooler is plumbed in the bottom hose outlet from the radiator so the water has already been cooled by the radiator where as the water temp sender is before the radiator. Cruising at 70 mph gives good cooling hence the oil takes ages to warm up.
Ian

[Chad speed]

Has anyone put a bypass linking the flow and return pipes to the oil cooler with a thermostat in it? Seems a logical step but don't know how practical it would be.

[AG Tuscan II S]

Off the top of my head, if new pipes were made with the diverter assembly you describe; it should be possible. The main concern would be adequate flow but not too much so as to upset pressures elewhere in the engine. Being on the high pressure side it might be quite easy to inadvertently reduce pressure in the engine - the tuners would know.

[Robertjp]

I priced up all the gubbins for an oilstat when i used to own the Cerby, was quite a common question as the cooling problem was even worse than my Tuscan- i.e. never got warm on cold days....and i love driving on cold crisp days!!

Dont think its a difficult job - wasnt on Cerby, but not looked at plumbing on Tuscan. Think it was going to cost between £100 and £150 diy, the oilstat was around £50 i think...

[RiddleMcFiddle]

I had a fan over ride switch plumbed in, for those days in long traffic jams to keep my water temps nearer 80c rather than 92+.

I can flick it on whenever i feel the need, hoefully reduces stress on the cooling system and reduces oil temps a little (which ive seen hit 95c in heavy traffic.

[AG Tuscan II S]

What a splendid idea!

[dvs_dave]

Indeed. Why hasn't anyone thought of this before?

A quick google brings this up which looks devilishly simple to install.
http://www.driftworks.com/catalog/products/inline-...

Loads of options available though.