This may of been covered before in 'fake over heat' but in warm conditions on the motorway my temp starts to steadily rise and will continue to rise unless I lower the engine revs. No over heat issues around town or in traffic. Recently had new radiator and oil and water all appear to be fine. 2.5 v6 sportronic 130,000miles. Do they all do this or do we suspect water pump/themostat issues Thanks
The pump, from what Wrinx said, seems to be logically the most likely problem.
As the rad has been replaced & the fact that the temp is ok in all other suitation then you have your fix.... i was going to suggest replacing the thermostat.... which might be a good idea anyways as its cheap enough & easy to replace.
Wrinx, will he have to replace timing belt & water pump at same time?
You can't cut corners on this one I'm sorry to say.
So its a)New water pump b)New Timing belt c) New tensioner d) renew any belt bearings that have high miles on them, or sound at all worn/dry.
Also check/replace the serpentine belt and its rollers as if this one comes off it has been known to take the timing belt with it, and its goodbye engine.
No its not a low cost venture, but doing it any other way is to take risks that you will have to do the whole lot again. No its not economical to do it on a 164...but who drives a 164 for economy? I maintain my 164s because I like the damned things
Oh yes..only entrust the T-belt job to someone who knows the job backwards. The correct tensioning using the correct tool is critical..whatever anyone else tells you.
164TS..No stoopid timing belt
164Super 24valve...2nd engine and gearbox..belts/water pump and the rest done 9000 miles ago