LEMON Manuals: Even more car manuals for everyone
Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 203 (Automatic Transmission Servicing - (AWD)) >> Lubrication >> Oil Cooler Flushing & Flow Check >> Initial Flush

Initial Flush

WARNING: This page is about a different car, the 2003 Pontiac Vibe. However, it is still accessible from the selected car via links, so may be relevant.
  1. Turn the water supply valve (1) to the ON position and allow water to flow through the oil cooler and pipes for 10 seconds to remove any remaining transaxle fluid. If water does not flow through the oil cooler and pipes, the cause of the blockage must be diagnosed and the plugged component must be repaired or replaced. Continue with the cooler flushing and flow check procedure once the blockage is corrected.
  2. Turn the water supply valve (1) to the OFF position and clip the discharge hose (5) onto a 5 gallon (19L) pail with a lid, to avoid splashback.
  3. Turn the water supply valve (1) to the ON position and depress the trigger (8) to mix cooler flushing solution into the water flow. Use the clip provided on the handle to hold the trigger (8) down. See Fig 1 . The discharge will foam vigorously when the solution is introduced into the water stream.
    NOTE: Flushing for approximately 2 minutes in each cooler line direction will result in a total of about 8-10 gallons (30-37L) of waste fluid. This mixture of water and flushing fluid is to be captured in a 5 gallon (19L) bucket or similar container.
  4. Flush the oil cooler and pipes with water and solution for two minutes. During this flush, attach the shop air supply 120 psi (825 kPa) to the flushing system feed air valve (2) located on the for 3-5 seconds at the end of every 15-20 second interval to create a surging action.
  5. Release the trigger (8) and turn the water supply valve (1) to the OFF position.
Fig 1: Flushing Transaxle Oil Cooler
G00170184Courtesy of GENERAL MOTORS CORP.