Very probably a head gasket or a cracked head, the work shop should have done a head check. This is a chemical test for exhaust gasses in the cooling system, now saying that, they could have done the test and it may at that stage still been a negative result. This has happened to me before, although I was convinced that the head was suspect, no test at that time proved beyond doubt that it was so, and a week or so later it did fail. How do you convince a customer to spent serious money to fix a problem that you only have a belief is there with no hard evidence? Sometimes you are between a rock and a hard place, probably what he should have done was tell you that he had done the test (if in fact he has) and advise on what his suspect may happen, and let you make the final decision. Some times you think that you are making the right decision and it comes back to bite you. Anyway, do not use a sealant as they just do not work and often cause more damage by blocking radiators, get it fixed properly.
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Tuesday, December 5th, 2017 AT 1:40 PM