clog in coolant system?

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jx295c

New Member
Hi Everybody,
I've experienced an overpressure sort of issue on the inlet hose just upstream of the heater control valve in the engine compartment near the firewall. Coolant is full and tried to evacuate all air out of the system by loosening the 17mm bolt near the water pump. It seems as if there is a clog somewhere in the bypass tube from the water pump back to the heater core. Any thoughts? Thought I might either use some plumber's wire or unclog by pressurizing the line through an air hose.
 


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