WASTEGATE Activating Diaphragm Check
- Check that activating rod is in place and retained by clip. Correct as required. Remove lines from diaphragm and attach a vacuum source to vacuum side of diaphragm. Apply 25 in. Hg vacuum and trap. If vacuum drops below 18 in. Hg after 60 seconds, replace wastegate activating diaphragm.
- Install an external pressure source to the pressure side of the diaphragm. Apply 5 psi and trap. If the pressure drops below 2 psi after 60 seconds, replace wastegate activating diaphragm. If pressure does not drop, release pressure but do not remove pressure source and hose.
- Install a dial indicator to measure travel of wastegate activating rod. Apply pressure VERY SLOWLY until dial indicator shows 0.015" movement. Pressure gauge should read 6.8±.5 psi. If wastegate arm does not meet specification or move freely, replace wastegate activating diaphragm. See Fig. 3
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Courtesy of FORD MOTOR CO.