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Home >> Mazda >> 2007 >> B4000 SE, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 331 (Engine Mechanical - Overhaul) >> Tappet Inspection >> Tappet LEAKDOWN Test

Tappet LEAKDOWN Test

WARNING: This page is about a different car, the 2007 Mazda B3000, 2006 Mazda B3000, 2005 Mazda B3000, 2004 Mazda B3000, and 2003 Mazda B3000. However, it is still accessible from the selected car via links, so may be relevant.
    NOTE:
    • This test will not be accurate if it is done with engine oil in the hydraulic valve tappet. Use testing fluid. New hydraulic valve tappets are already filled with testing fluid.
  1. Compress the hydraulic valve tappet to remove the engine oil, if necessary.
  2. Place the (A) hydraulic valve tappet in a (B) commercially available hydraulic tappet leakdown tester. Position the (C) steel ball provided in the plunger cap. Add testing fluid to cover the hydraulic tappet and compress hydraulic tappet leakdown tester until the hydraulic valve tappet is filled with testing fluid.
    Fig 1: Placing (A) Hydraulic Valve Tappet In (B) Hydraulic Tappet Leakdown Tester
    G03312346Courtesy of MAZDA MOTORS CORP.
  3. Adjust the length of the (A) ram so that the (B) pointer is just below the (C) Start Timing mark when the ram contacts the hydraulic valve tappet. Start timing as the pointer passes the (C) Start Timing mark and end timing as the pointer reaches the (D) center mark.
    Fig 2: Compressing Hydraulic Valve Tappet
    G03312349Courtesy of MAZDA MOTORS CORP.
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