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Avulon · 5th April 2016, 21:45

Get a block test kit and test the coolant for exhaust gasses.

When you top up the coolant after a 'loss event' is there any (at all) oil sheen on the top of the coolant in the header tank?

Is the oil level always rising when a coolant loss occurs?

Exactly which gaskets have been changed?

Did you test the original oil cooler, once it was off the car?

Are you absolutely sure to be following the correct coolant fill and bleed procedure. I get the feeling that the diesel is the easiest engine to do this on, but mistakes can still be made. An air-lock in the heater matrix is easy to create. make sure the car is on level ground (from my knowledge of the system I'd suggest that if on any sort of slope then make the front the higher end) when bleeding the cooling system - and don't rush filling it.

Last question: When removing the header tank cap with a cold or nearly cold engine is there any pressure release?

5th April 2016, 21:45	#77
Avulon This is my second home 1.8t Tourer Join Date: Oct 2011 Location: Tanelorn Posts: 4,830 Thanks: 956 Thanked 1,148 Times in 916 Posts	Get a block test kit and test the coolant for exhaust gasses. When you top up the coolant after a 'loss event' is there any (at all) oil sheen on the top of the coolant in the header tank? Is the oil level always rising when a coolant loss occurs? Exactly which gaskets have been changed? Did you test the original oil cooler, once it was off the car? Are you absolutely sure to be following the correct coolant fill and bleed procedure. I get the feeling that the diesel is the easiest engine to do this on, but mistakes can still be made. An air-lock in the heater matrix is easy to create. make sure the car is on level ground (from my knowledge of the system I'd suggest that if on any sort of slope then make the front the higher end) when bleeding the cooling system - and don't rush filling it. Last question: When removing the header tank cap with a cold or nearly cold engine is there any pressure release? __________________ Need a T4 ?: T4 Owners Map thanks to Stevestrat ( use at your own risk) Where?: https://en.wikipedia.org/wiki/Tanelorn Mods/Retrofits: PCV vortex 'filter'; bluetooth; inline thermostat; reversing sensors; plenum spyhole ; headlamp washers ; Diy mp3 player replacing CD multichanger; FBH with remote; Headlamp washers; black/chrome front grille, rear blind; Xenon projectors To do: puddle lights; 2 Din cd/nav to fit; boot release button Last edited by Avulon; 5th April 2016 at 21:50.. Reason: columbo