April, 2008 IMPCO Technologies Inc. PPI-109-REV. B
5. Sparingly apply Loctite
TM
567 or equivalent thread sealant on the threads of the pressure test
adapter and install it into the regulator primary test port (torque F4-4 to 10 ft-lb, finger tight the
F4-8 plus 1 ½ turns).
6. Connect one end of a section of 3/16” vacuum hose (H1-11) to the hose nipple on the pressure
test adapter and the other to the outside hose nipple on differential gauge TG-005 (see section B
in this chapter for gauge connections).
Cobra illustrated with F4-4. The F4-8 is similar
7. Open the fuel tank manual valve and test for leaks before starting the engine.
•
When reinstalling the test port plug, clean all traces of old sealant from the threads, apply a
minimal amount of Loctite
TM
567 or equivalent thread sealant on the plug threads and install
into the regulator (torque to 10 ft-lb).
•
Test for fuel leaks before starting the engine.
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