Remembering why I
dislike working on
AO Silver Member
Join Date: Sep 2001
The oil cooler on the 155 V6 is an oil/air device so no direct connection to the coolant.....but of course, if the stat is stuck open, that'll slow down the warmup. It's certainly rare to see oil temperature even close to the middle of the gauge - it's normally nailed pretty much at the bottom. What's weird is it takes so long even left idling...and the moment you move off, the temperature drops again. All the symptoms of a duff stat...but not a duff stat.
You have a good point about the heater though...the recirculation flap actuator broke years ago, so it's always running on external air. That would certainly have a significant effect on how much cooling the heater creates. Perhaps I'll try jamming it closed next cold-snap and see if that helps.
Yesterday, with an ambient of around -1 or -2, it took about 20 minutes to get close to 90 - a short trip of about 3 miles at moderate pace(!) followed by idling for about 10 minutes. Stayed there once it made it though.
Still, what with the frozen handbrake cables, clutch master starting to feel very iffy and the woefully sluggish warmup, it's days are numbered. Given what cars are fetching these days, I might just weigh it in soon. Don't have the time/space/inclination to break it. I said it last year - if it fails the MOT for anything less trivial than a blown bulb, I think it's history.