Hi Peter,
It's often been a vexed topic, but my understanding from past discussion/experience here is that it is best to choose between any of G11, G12+, G12++ and more recently G13 for the WBX motor. But not G12. For peace of mind, more google searching may glean
more info re incompatibility of G12 for WBX motor.
Now to put the cat amongst the pigeons, the HEPU G12 Plus coolant (purchased from Tooley Imports) states on its label "G12 plus can be mixed with G11 and G12." I find that hard to believe for WBX motor and is contrary to all past syncro forum discussion
here concerning avoiding G12.
Interestingly:
Bentley Repair Manual states (Appendix P12) "The coolant system has been filled at the factory with a permanent coolant which does not need to be changed."
With an exception though:
Bentley states (19.11) "Coolant/antifreeze MUST NOT be reused when replacing engine, cylinder head gasket, radiator and heater core."
And confirming Bentley:
For example, two brands of G12+ coolant I have previously purchased from Tooley Imports ... HEPU and VAICO, both state on their labels "Suitable as a "filled for live" for all types of engines." I assume they mean "life".
Begs the question though, wouldn't VWs own expected (turnover) life of a vehicle to be say only 10 years? If so, then VW (and we) wouldn't expect the original factory coolant fill ... 25 years later ... to still be even remotely viable. In which case then,
its a misleading statement ... "filled for live" (life).
In conclusion, I can only restate what a local VW mechanic, now retired, advised me based on his long past experience servicing VWs. ... "No need to change from original G11 for WBX motor." Despite later coolant iterations being compatible with G11 (arguably
not G12) there is no added service advantage for use in WBX as they are all primarily meant toward supporting newer engine design/developments/technology/systems introduced post T3.
Cheers.
Ken
From: Syncro_T3_Australia@yahoogroups.com <Syncro_T3_Australia@yahoogroups.com> on behalf of richo1166@yahoo.com.au [Syncro_T3_Australia] <Syncro_T3_Australia@yahoogroups.com>
Sent: Friday, 21 October 2016 12:22 PM
To: Syncro_T3_Australia@yahoogroups.com
Subject: Re: [Syncro_T3_Australia] Re: New old Syncro - replacing engine
Yeah I am now thinking the same. Well handy to know as I am going to have to get a Diff Lock Transaxle one day however mine doesn't have the boss to take actuator :( or maybe weld in a boss, anyway that is a discussion I will need later down the track..
so going forward
I am flushing the cooling system this weekend and filling with G12 and distilled water... gee I recon the radiator is a mess and the pipes, as there was so much rust in the system after sitting still for 2 years... It had green coolant originally in it,
but mostly it was water and rust...
I'll be looking after the new motor as it is dusty but not a sign of leaks anywhere (first vw flat motor I have ever seen without a oil leak at least) .
Thanks again everyone
Peter