I just started my fresh water cooled A4 on the hard using a pail and hose for the raw water intake. I have used this system for years. The raw water side seems fine with good aspiration of the water and good flow out with the exhaust. On the fresh water side (antifreeze), the hose coming from the exhaust manifold to the heat exchanger is very warm and the return to the pump is very cool and doesn't change as I run the engine. The temp has reached 190 (last year it never ran above 140, even under load) and would continue. I have clamped the bypass hose without change. Any suggestions as the the next diagnostic steps. The heat exchanger is 3 years old from MMI and has run flawlessly. I did pull the engine forward to replace the stuffing box this spring, but replaced hoses as before.
Thanks
Thanks
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