Quote:
Originally Posted by jaybutter
I have rebuilt the mono valve...
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Loss of heat at highway speed is very likely to be a monovalve problem. There have been a number of reports on this forum of defective aftermarket monovalve inserts that cause that issue.
Quote:
Originally Posted by jaybutter
Again, the air at the outlets gets cold very quickly right at 50 MPH.
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Classic monovalve symptom.
Quote:
Originally Posted by jaybutter
What is the best way to bleed the air out?
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As designed, the 617.95 engine is self-bleeding. The thermostat housing features a passage that bypasses the thermostat; any air should wind up in the expansion tank.