I’ve read about that on the subaruvanagon site, but I doubt it can “condition” that rubber seal and the failed sealant.  It would likely take a lot for the 18 quart Vanagon cooling system anyway!

 

Thanks for the idea though.

 

Stuart

 

From: Dan N [mailto:dn92610@gmail.com] 
Sent: Saturday, December 19, 2015 5:18 PM
To: Stuart MacMillan
Cc: Vanagon Mailing List
Subject: Re: Dreaded water jacket head gasket leak strikes

 

for now you may try this Subaru coolant conditioner

 

http://www.amazon.com/Subaru-SOA635071-Coolant-System-Conditioner/dp/B00IGZP2UE/ref=sr_1_1?ie=UTF8 <http://www.amazon.com/Subaru-SOA635071-Coolant-System-Conditioner/dp/B00IGZP2UE/ref=sr_1_1?ie=UTF8&qid=1450574144&sr=8-1&keywords=subaru+coolant+conditioner> &qid=1450574144&sr=8-1&keywords=subaru+coolant+conditioner

 

it's working well on my son's Jeep.. loss of coolant but no leak (internal leak)