Over the weekend I got a bit of a scare, as I have only owned my new (to me) Pajero for a few months.
Could someone possibly tell me what could cause this behavior:
Traveling at about 120km/h-130km/h on the highway.
When I stopped I noticed a "hiss" from the radiator cap.
Being in a bit of a hurry I make a mental note to check the water and the cap before I leave back home.
I stop at the first petrol station I can find and top up the water, which was a bit low, and head home.
Temperature gauge normally sits at about 45%
Somewhere nearing the end of the trip I looked down and the gauge is sitting at around 75%;
As I watch it comes down to about 50%.
This happens another 2 or 3 times at seemingly random intervals.
All this while doing 120-130.
Just before I get to the last uphill before home the needle goes up to just under the white line on the gauge ...
Of course I freak out a bit and pull over.
I check the water again, seems fine.
I start up again and in a few minutes that temperature drops back down to 55%.
I drive up the hill and home.
3 or 4 short trips during the weekend and another today with no repeat of the above behavior.
My personal experience makes me think of a misbehaving thermostat ...
Any advice?
