Temperature gauge drop

[Rainman Advanced Member Find all posts View Profile Close Rainman]

Took the camper trailer for a spin on the weekend and coming home yesterday I was descending a reasonably steep hill and noticed the temperature gauge slowly dropping until it was about half way between its normal running temperature and cold. I pulled over to the side but by the time I'd stopped it was virtually back to normal. I've never seen this before but I'm sure I've read about it here somewhere?

I checked the coolant last night once everything had cooled down and levels seem pretty normal. Anyone got any wise words, the temperature at the time was around 27°c?

[carco Advanced Member Find all posts View Profile Close carco]

All normal, my coolant temp will drop heaps coming down say the Toowoomba Range. Auto oil temp will go up of course.

[Rainman Advanced Member Find all posts View Profile Close Rainman]

All normal, my coolant temp will drop heaps coming down say the Toowoomba Range. Auto oil temp will go up of course.

That's interesting because after 12 years of ownership its the first time I've noticed it. I used to own a Surf so keeping a close eye on the temperature gauge has become second nature.

[LeighW Avid PP Poster! Find all posts View Profile Close LeighW]

If its cold enough and you have the heater pumping out heat it can cool the motor, if you have not
noticed it under similar conditions before I would be looking at the thermostate.