406A Raypak rattling noise in header

[brendanmcaninch]

My 406A has had a rattling noise in the header. It shuts itself down and I suspect the Unitherm Governor or bypass or both is the problem.
I can't get the square retainer bolt out. Any suggestions? It is not in that bad of shape but had Leslie's pool come and he had a simple crescent wrench he couldn't get it open with. Here is a picture of square bolt- . The end problem seems to be flow is constricted and overheats and get ignition failure as faults. Checked everything else out. Any guidance?

 

[ajw22]

Soak the bolt with Kroil penetrating oil for a while.

Put a socket wrench on it. You may end up snapping the bolt.

With that much corrosion the heater probably has other problems.

Good luck.

 

[brendanmcaninch]

Thank you. Will give it a shot this weekend.

 

[brendanmcaninch]

Soak the bolt with Kroil penetrating oil for a while.

Put a socket wrench on it. You may end up snapping the bolt.

With that much corrosion the heater probably has other problems.

Good luck.

sorry i am new at this- but can i take the header off from detatching the inlet/outlet access pipes as well as the 8 bolts where it attaches to the heat exchanger and just pull it out? Or will i need to cut out some plumbing pipes? Will that give me access to repair and replace parts in the header if need be)- or do i have to get that large brass bolt off. Thanks again for your help