ok an odd problem here, the brother has a terranno 2.7 great jeep until lately when it stated to fill the coolant expansion bottle with coolant when up to driving temp and when it cools down it dont pull the coolant from the bottle back into the rad like its supossed to do. he changed the thermostat, rad cap and a new water pump went into it last january. the head gasket has been tested with the sniff test and that shows the coolant free of exaust gas so head is not the prob. all hoses have been checked and new jubliee clips fitted.its not leaking coolant anywhere and has had a couple of flushes in case of blockages. we spent yesterday ripping it apart checking rads and every f**kin thing and he just rang me to say still the same. i told him burn the c--t but before he heads for the matches any ideas
