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Home >> Isuzu >> 2007 >> i-290 LS, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 50 (Suspension Control System - Suspension Leveling (ESCM)) >> Diagnostic Information and Procedures >> Air Compressor Leak Test

Air Compressor Leak Test

WARNING: This page is about a different car, the 2007 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.

Tools Required

  1. Attach the J 22124-91  pressure gage adapter to the air dryer. See Special Tools .
  2. Attach the J 22124-B  pressure gage to the J 22124-91  pressure gage adapter with the toggle valve on the opposite side of the air compressor. See Special Tools . Close the toggle valve.
  3. Apply air pressure at the schrader valve. Pressurize until the J 22124-B  pressure gage reads 690 kPa (100 psi). See Special Tools .
  4. Check the following areas using soap bubbles:
    • Solenoid valve-Replace the air compressor head if leaking.
    • Air dryer to compressor head O-ring-Replace the air dryer if leaking.
    • Air dryer cover-Replace the air dryer if leaking.
    • Air compressor head gasket-Replace the air compressor head if leaking.
    • Air compressor head cover gasket-Tighten the cover bolts to 5.6 N.m (50 lb in) if the head cover gasket is leaking. If the leak persists, replace the air compressor head.
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