[right way right]

Those heat exchangers always worked great as long as they had no holes in the heat hoses and the cables and levers were in good working order.
Simple maintenance.

[fireman15]

Those heat exchangers always worked great as long as they had no holes in the heat hoses and the cables and levers were in good working order.

I spent a lot of time driving an old VW van in the winter. The “heating system” was the same as in the bug which had a lot less area inside. It worked but was undersized for the van when it was very cold out.