overheating grand voyager
 

Hello,

I have a 2003 grand voyager 2.5, after about 20-30 minutes of driving the temp gauge tends to creep over ½ to ¾, mainly when on hills or motorways with inclines. If I lay off the accelerator it drops back to ½ again. I’ve no clue when it comes to cars so no idea with what it could be. No leaks, water levels all look normal.

The heating in the car leaves a lot to be desired also, not really performing fully. Is it possible this could be related, or am I looking at a more serious problem?

Any help or advice would be greatly appreciated.

Thanks.

Its pointing to a thermostat problem here or air in the system like top hose, hence crap interior heater. Have you renewed Coolant lately.
Odd that the stat may have failed not fully open but almost closed.
Of course to settle another problem I take it there's no oil or exhaust gas in the coolant bottle. But it is running slightly hot all the time.
Said that you also mention heater. Air in coolant yet again.
I've went over this again and somehow water pump is ringing bells as to this total problem.

5 year coolant change protocol - miss just one and you have a 10 year old coolant full of solids and lumps. Get 5 litres of G05 HOAT and the same amount of ASDA [de-ion] iron water and get it changed. A DIY job that takes all of 10 minutes and costs £25 - youtube is your friend.

Thanks for these suggestions. I shall give them a try and let you know how it gets on. Much appreciated.

I think you'll find both the radiator (for coolant) and the thermostat need to be replaced.
Aluminium-cored radiators will corrode if the antifreeze isn't changed on time. The ally-rads can't be flushed, only replaced. However I've partial good news, as my posting "Fitting a second thermostat" will save you a LOT of money and time. When the existing thermostat is shoved to its limit by overheating, it is organized to jam in the open position. So leave it alone and fit the second thermostat very cheaply and easily. The minor mod. is proven over time.

Leedsman.