The 75 and ZT Owners Club Forums - View Single Post

Yorkshire GOC · 11th October 2019, 12:21

If i was suspecting HGF - albeit on my 1.8t - i would be looking for the following

1. Brown mayo on the dipstick

2. Brown mayo under the oil filler cap

3. Pressure escaping from a cold system - ie after a good thrash - say 10-15 miles at motorway speed - leave till next day and open expansion tank cap - if there is a loud sound of escaping gas then that points to exhaust fumes in the cooling system and points toward HGF

Did your mechanic do the chemical CO2 test on the coolant - not sure if it gives false positives - but it sems to be in widespread use to identify exhaust gases in the coolant.

11th October 2019, 12:21	#3
Yorkshire GOC I really should get out more....... Rover 75 connoisseur se v6 auto Join Date: May 2014 Location: Hull Posts: 2,069 Thanks: 1,842 Thanked 623 Times in 469 Posts	If i was suspecting HGF - albeit on my 1.8t - i would be looking for the following 1. Brown mayo on the dipstick 2. Brown mayo under the oil filler cap 3. Pressure escaping from a cold system - ie after a good thrash - say 10-15 miles at motorway speed - leave till next day and open expansion tank cap - if there is a loud sound of escaping gas then that points to exhaust fumes in the cooling system and points toward HGF Did your mechanic do the chemical CO2 test on the coolant - not sure if it gives false positives - but it sems to be in widespread use to identify exhaust gases in the coolant. __________________ 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.