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'02 Monaco

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Bruce Benson:
I have not been down this road and remain skeptical.  

Assuming that there is an air lock my guess would be that it is at the pump unless one exchanger in the circuit is working properly.  I would ensure that this is not the case by loosening the fittings down stream while the pump was running.

OK, I do think that the lines tee off to each exchanger and tee back on the return in a parallel fashion rather than going into to the first then out to the second and so on in a series type circuit.  I suppose that air could cause the flow to only go to one exchanger.  

My next step would be to increase the flow through the lines by relieving the back pressure on the return line.  You could do this by adding a tee and valve to the return line and letting the fluid flow out into a jug or by emptying the surge tank and removing the pressure cap.  Then run the pump and it might increase the flow enough to expel the air.  

Another thought is, assuming that you do have flow to one of the heat exchangers in the circuit, you might try putting a valve to shut off the return at that exchanger to force the flow through the other exchangers.  You might then have to add a valve to the next exchanger that then works in order to force the flow to the third one.  Once each has flow the air will be out and you can turn the two valves back on.  This would provide you with a way to bleed the air in the future without any mess.

Bruce

    

Forrest King:
had the problem on mo 05 montery. What I found was the check valve was not opening just took the handle on screw driver an tap the check valve working fine now had this happen a couple of times.

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