Mazda Trucks 1972-1986 Repair Guide

Specification Charts

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See Figures 1 through 11

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Fig. Fig. 1: General Engine Specifications



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Fig. Fig. 2: Camshaft Specfications



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Fig. Fig. 3: Valve Specifications



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Fig. Fig. 4: Crankshaft and Connecting Rod Specifications



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Fig. Fig. 5: Piston and Ring Specifications



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Fig. Fig. 6: Eccentric Shaft Specifications: Rotary Engine



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Fig. Fig. 7: Rotor Housing Specifications: Rotarty Engine



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Fig. Fig. 8: Seal Clearance Specifications: Rotaty Engine



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Fig. Fig. 9: Seal Specifications: Rotary Engine



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Fig. Fig. 10: Torque Specifications: Piston Engines



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Fig. Fig. 11: Torque Specifications: Rotary Engine

Checking cylinder compression on diesel engines is basically the same procedure as on gasoline engines except for the following:

  1. A special compression gauge adaptor suitable for diesel engines (because these engines have much greater compression pressures) must be used.
  2.  
  3. Remove the injector tubes and remove the injectors from each cylinder.
  4.  

Don't forget to remove the washer underneath each injector; otherwise, it may get lost when the engine is cranked.

  1. When fitting the compression gauge adaptor to the cylinder head, make sure the bleeder of the gauge (if equipped) is closed.
  2.  
  3. When reinstalling the injector assemblies, install new washers underneath each injector.
  4.  

ROTARY ENGINES



The conventional compression gauges that are used for gasoline and diesel engines are not suitable for use on a rotary engine as they only measure the highest pressure of the three combustion chambers in the rotor housing. To accurately determine compression pressure on rotary engines, a special electronic compression tester (49-F018-9A0) is required. This piece of test equipment reads the compression of all three combustion chambers.

 
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