Its exhaust gas passing through a failed head gasket into the coolant system hoses - if it is suspected that this is happening always worth a good sniff of the coolant tank - if it smells of exhaust fumes then that could point to HGF. On the debate of an audible hiss when opening a cold expansion tank my 1.8T is silent - i did have hiss a couple of years ago and swopped out the expansion tank cap and all has been OK since - saying that i swop out the expansion cap very 12 months or so.
__________________
She came off the Longbridge Line on 20-05-2003
The Silver Machine was the 13th of 160 Rover 75's to come off the production line that day and is the 100th of 527 Starlight Silver Rover 75 2.5 V6 Connoisseur SE Auto saloons listed in the build records produced world wide.
|