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Valves Check valve face angle, head diameter, margin thickness and stem diameter. Service or replace valves if Valve Seat Correction Angles Measure seat contact width on valve. See VALVE SEAT. If seat width is not within specification or if valve VALVE TRAIN Hydraulic Lash Adjusters 1. Remove camshaft cover. Check movement of each Hydraulic Lash Adjuster (HLA) by pushing downward using hand pressure only. If HLA compresses, replace HLA. To remove HLA, remove 2. Inspect HLA friction surfaces for wear and damage. Replace HLA if required. Coat HLA with engine oil and install in original location. Ensure HLA moves smoothly in bore by using small magnet attached to CYLINDER BLOCK ASSEMBLY Piston & Connecting Rod Assembly 1. Before removing rod cap from crankshaft, measure and record rod side play. See CONNECTING RODS under ENGINE SPECIFICATIONS. Before removing connecting rods, measure and record connecting 2. Before separating piston from connecting rod, mark piston in relation to connecting rod. Check oscillation movement of piston and rod assembly (hold piston horizontally, lift rod and allow rod to drop 3. To separate components, press piston pin out of piston and rod assembly, noting pressure required to Normal 1.772-1.791 (45.00-45.50) Serviceable 1.733-1.772 (45.60-46.50) NOTE: If hydraulic lash adjusters are persistently noisy, check with manufacturer NOTE: During disassembly, match mark components for reassembly reference.
1997 Mazda MX-5 Miata 1997-98 ENGINES 1.8L 4-Cylinder
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