When it's cold and off, open the reservoir cap to release any residual pressure,/vacuum. Reinstall the cap, start it up and rev it up a couple times then shut it off. If you hear a pressure change you have a problem.
_________________ GDE FT Ecotune, EHM, Weeks kit stage 1 & 2, Carter 4600 lift pump, Upgraded tranny, Fishing boat hauler! New at 164K: head gasket, rockers, exhaust valves, ARP head studs, Injectors, 5v Bosch glow plugs, water pump, timing everything, serpentine everything, New at 225k: new head, timing belt
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