Flywheel Specifications


The following flywheel specifications may be used as reference
when surfacing flywheels.

                   Type of 
Manufacturer       flywh. Specs.          Comments

BMW                Step   .013 - .015
Datsun             Step   .003 - .005   No groove
                   Flat                   With groove
Datsun 240Z        Step   .010           With groove
Fiat Spider 1600   Step   .018
Ford Falcon        Cup    .018           6 Cylinder engines
Ford Courier       Cup    .285
                   Cup    .310
Ford Ranger        Cup    .003           V6 Cylinder engines
GM                 Cup    .125
GM - Buick         Cup    .125           V6 Cylinder engines
GM - Spirit        Cup    .195
Honda              Cup    .030           Small cup
                   Cup    .100 - .104   
                   Cup    .785           Long alignment pins
                   Cup    .900            Short alignment pins
Honda Accord       Cup    .615           
Mazda              Cup    .062           Rotary engines
Subaru             Cup    .785
Toyota             Step   .018 - .022   Large alignment pins
                   Cup    .055           Small cup
                   Cup    .965 - .970    Tercel, large cup
                   Step   .040           Tercel, step
                   Step   .020           Land Cruiser
VW                 Cup    .945           Air cooled, 6 Volt
                   Cup    .830           Scirocco
                   Cup    .835           Rabbit/Golf
                   Cup    .982           Air cooled bus engine
                   Cup    .830           Air cooled engine
                   Cup    .885           Air cooled engine

Specifications listed for Step type flywheels refer to the
height of the wear surface above the pressure plate mounting
surface.  Specifications for Cup type flywheels refer to the
height of the pressure plate mounting surface above the wear
surface.

                                     The AERA Technical Committee

February 1988 - SB 153


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                                      Piston Contact With Connecting Rod On
                         Navistar (International Harvester) D-354 (5.8L) Engine

The clearance between the piston pin center line and the under side face of the piston has been reduced in a move to standardize pistons between manufactures. 

When installing replacement pistons check to be certain that clearance exists between the under side of the piston and the boss on the small end of the connecting rod. 

When interference is discovered during piston to rod assembly operation, the boss must be removed to blend with the radius of the small end of the rod as shown in the illustration below. 

Rebuilders are cautioned to reestablish the chamfer in the oil hole after removing the boss and balance reciprocating end of the connecting rod to ensure uniform rod weight after boss removal. 
          
Note: This condition might exist in Falcon (Ford) 2.8L (170 CID) and Navistar (International Harvester) Scout 4 cylinder engines. Engines of other makes and models should be checked and corrected as above when necessary.

                                                                                 The AERA Technical Committee

                     Flywheel Specifications

The AERA Technical Committee suggests referring to the following
flywheel specification chart when re-surfacing flywheels.

                    Type of 
Manufacturer        Flywheel  Specs          Comments
_________________________________________________________________

Allis Chalmers      Cup       1.437         D17,D19,190XT
                                             Tractors
AMC                 Cup       .125          2.5L (GM engine)
Alpha Romeo         Cup       .878
BMW                 Step      .013-.015     320i
Caterpillar         Cup       2.937 +/-.005 #9N2646 Cast Number
Chrysler/Mitsubishi Cup       .600-.605     2.0L DOHC, #9801
                                             Cast Number
Chrysler            Cup       1.00          3.7L engine
Cummins             Cup       2.925    
Cummins             Cup       2.937         2 piece clutch
DDC                 Flat      1.582         8.2L, Minimum
                                             thickness
Fiat, Spider        Step      .018          1600 engine
Ford, Falcon        Cup       1.00          6 Cylinder engines
Ford, Courier       Cup       .285
Ford                Cup       .310
Ford, Ranger        Cup       .003          V6 Cylinder engines
Ford Truck          Cup       1.500         534 CID Truck
Ford Truck          Flat      .965          New Thickness
Ford                Cup       1.140-1.160    Model A 
GM, OHC Brazilian   Flat      .750          New Thickness
GM                  Cup       .125          2.5L, & Vega
GM, Buick           Cup       .125          V6 Engines
GM, Spirit          Cup       .195
GM, Sprint          Cup       .1969         Chevrolet/Suzuki
Honda               Cup       .030          Small cup
Honda               Cup       .030          #K4SC16AG Cast
                                             Number
Honda               Cup       .100-.104     
Honda               Cup       .785          Long alignment pins
Honda               Cup       .900           Short alignment pins
Honda, Accord       Cup       .615          1986
Hyundai, Excel      Flat                     Mitsubishi engine
Isuzu               Cup       .010-.017     Trooper, Pup
Isuzu, Diesel       Cup       1.691-1.695   6BD1, 6BDT engines
Mack Midliner       Flat      1.260 Min.    Measure from
                                             crank/mount to disc
Mazda               Cup       .062          RX2 Rotary engines
Mazda, RX7          Cup       .310
Mazda, 2.2L, 1987   Cup       .785          Hyd. Clutch,
                                             Segmented wheel
Mazda, 2.0L         Cup       .805          Hyd. Clutch, .020
                                             max/removal
Mercedes, 240D      Cup       .885
Navistar, 404/446   Flat      .750          New thickness
Navistar, 6.9L      Flat      1.410         Minimum thickness
Navistar 9.0L       Flat      1.585         Minimum thickness
Nissan              Flat                     With groove
Nissan, Maxima      Flat                     With groove, #425
                                             Cast Number
Nissan, (Datsun)    Step      .003-.005     No groove
Nissan, 
(Sentra,Stanza)     Step      .006-.010     1.6L & 2.0L engines
Nissan, B2000       Cup       .807 new      Max stock removal
                                             .020
Nissan,(Datsun)240Z Step      .010          With groove
Renault             Step      .021          1.4L Alliance
Saab, 96            Cup       .656
Subaru              Cup       .830           Justy
Subaru              Cup       .875
Subaru              Cup       .905           4X4 Brat
Suzuki              Cup       .070
Suzuki              Cup       .197          1.0L, 3 cyl
Toyota              Step      .018-.022     Large alignment pins
Toyota, 22RE        Step      .018-.022     #627 Cast Number
Toyota              Cup       .055          Small cup
Toyota              Cup       .965-.970     Tercel, large cup
Toyota              Step      .040          Tercel, step
Toyota              Step      .020          Land Cruiser
VW                  Cup       .945          Air cooled, 6 Volt
VW                  Cup       .913-.918     210MM Clutch
VW                  Cup       .830-.835     Rabbit/Golf/Scirocco
Vanagon             Cup       .982          Water/Air cooled bus
                                             engine
VW                  Cup       .830          Air cooled engine   
VW                  Cup       .885          Air cooled engine

Specifications listed for Step type flywheels refer to the
height of the wear surface above the pressure plate mounting
surface.  Specifications for Cup type flywheels refer to the
height of the pressure plate mounting surface above the wear
surface.

                                     The AERA Technical Committee

June 1992 - TB 677R 
(Please destroy TB 677)

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