aftermarket radiator overflow bottle on GQ Patrol

I can not reply specifically for your GQ, however I have fitted one to my 93 Jackaroo diesel and have had no dramas as far as the colling system goes. The overflow bottle that I brought has a bottom entry/exit as opposed to the original top entry/exit. the only issue I have had with this was finding a suitable mounting place to accomodate the bend required in the hose. Originally it was a bit too tight, and with some heat in the coolant the hose became supple and kinked. Easily fixed with a slight change of location.

As long as the overflow bottle inlet/outlet is below that of the radiator outlet, you should be fine.

Hi, I bought a new GQ aftermarket overflow bottle on EBAY...
it fitted perfectly and has lasted well...we have since driven the old GQ right around Australia and the bottle is still good.
Cheers Gerard and Anne.

HI Rob, I have fitted many over flow bottles to my vehicles over the years to vehicles that didnt come from the factory with one. Any of them will do but obviously go for one that is the size you want. DONT FORGET replace the radiator cap at the same time with the recomended one for your vehicle so that way it will let the water/coolant out when needed and also suck it back in when it cools down. I would even replace the rubber hose running from the radiator to the overflow bottle........WHG

Thanks Gerry and WHG, I appreciate your responses. Rob.

You dont have to change or move the bottle to fit an extra battery, all the big after market suppliers have a bracket that fits between the bottle and the motor which takes the battery, it matches the other side as in placement, i have a GQ and have done this battery fit , the batt cradle is about $100. As for the bottle, if it has gone brittle replace it as the 4.2 has to have every thing working perfectly for cooling, i paid $60 for a after market bottle. Col

my GQ is efi and the same problem , I made a battery tray that sits up in the corner betwee nthe A/C hoses and the inner guard close to the firewall ,had to alter one A/c hose because of the charge port . it holds an original size battery ,has been there fore 10 yrs .had to also move the coil and bits a bit closer to gether to get a bit more room .but it looks original to the untraned eye
mechpete