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The following technical bulletins were published by AERA.
 FLYWHEEL SPECIFICATIONS
                     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


##END##
 FLYWHEEL SPECIFICATIONS
                     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)

##END##
 FLYWHEEL SPECIFICATIONS
                                                Flywheel Specifications

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

Manufacturer        Type  Specification   Comments
--------------------------------------------------------------------
AMC                         C     .125           2.5L GM engine
Acura                       C     .030           Integra  1.6L engine
Acura                       C     .060-.070      Legand 2.7L engine
Audi                          S     .003-.005      4000 1.6L engine
Audi                          C     .982           Quatro 2.1L engine
Alfa Romeo             C     .878           2.0 & 2.5 L engine
BMW                        S     .013-.015      320i
BMW                        F     .984           Minimum thickness
Caterpillar, 3208     F     1.018          Minimum thickness
Caterpillar, 3208     C     1.060-1.070    
Caterpillar, 3406     C     2.937 +/-.005  #9N2646 Cast Number
Chrysler/Renault     S     .014-.021      1.4L engine
Chrysler/Mitsubishi C     .600-.605      2.0L DOHC, #9801 Cast Number
Chrysler                    C     1.00           3.7L engine
Cummins, B Series   F     1.260          Minimum thickness
Cummins, C Series   C     2.925          
Cummins                    C     2.937          Two piece clutch
Daihatsu                    C     .960-.965      6.5 clutch
DDC                           F     1.582          8.2L, Minimum thickness
DDC, 71 Series        C     2.937
Fiat                            S     .018           1600 Spider engine
Ford, Festiva            C     .020           1.3L engine
Ford, Probe              S     .020            2.2L engine
Ford, Falcon             C     1.00           L-6 engines
Ford/Mazda              C     .285           Courier, 1.8 & 2.0L engines
Ford                           C     .310
Ford, Ranger            C     .003           V-6  engines
Ford Truck, 6.1L       F     1.005          Min. thickness, 
                                          c/mount to fric/pad
Ford Truck                C     1.500          478 & 534 CID Truck
Ford Truck                F     .965           New Thickness
Ford Truck                F     1.410          6.9L Diesel, Minimum thickness
Ford                          C     1.140-1.160     Model A 
GM, GEO                  C     .787           Storm
GM, GEO                  C     .105           Metro, 3 cyl. engine
GM, Chevette           C     .018-022
GM, Brazilian OHC   F     .750           New Thickness
GM, Luv Truck         C     .015
GM                            C     .125           2.5L, & Vega
GM, Buick                C     .125           V-6 engines
GM, Buick                C     .656           401 V-8 engine
GM, Spirit                 C     .195
GM, Sprint                C     .1969          Chevrolet/Suzuki, 3 Cyl.
Honda, Prelude      S     .008-.010      2.0L engine
Honda, CRX            C     .017           1.5L engine 
Honda                     C     .030           Small cup
Honda                     C     .030           #K4SC16AG Cast Number
Honda                     C     .100-.104      
Honda                     C     .785           Long alignment pins
Honda                     C     .900            Short alignment pins
Honda, Accord       C     .615           1986
Hyundai, Excel       F     .000            Mitsubishi engine
Hyundai, Sonata     C     .157           1989 2.4 & 3.0L engines
Isuzu                        C     .010-.017      Trooper, Pup
Isuzu                        C     .151-.159      2.6L engine
Isuzu, Diesel           C     1.691-1.695    6BD1 & 6BDT engines
Mack Midliner,MIDR  F     1.260 Min.     Measure from crank/mount to disc
Mack Midliner,MIDS  C     1.500          Renault engine
Mazda                     S     .020           323, 1.6L engine
Mazda                     C     .062           RX2 Rotary engine
Mazda                     C     .310           B2000, 2.0L engine 
Mazda                     C     .640           1984 Rotary, 227 Cast number
Mazda, 2.2L, 1987   C     .785           Hyd. Clutch, Segmented wheel
Mazda, 2.0L             C     .805           Hyd. Clutch, .020 max/removal
Mercedes, 240D      C     .885
Navistar, 404/446    F     .750           New thickness
Navistar, 268D        S     .110           German Diesel engine
Navistar, 466D        F     1.430          
Navistar, 6.9L          F     1.410          Minimum thickness
Navistar 9.0L           F     1.585          Minimum thickness
Navistar 9.0L           F     .907           New thickness
Nissan                     F                     With groove
Nissan, Maxima      S     .003-.005      New thickness 1.010
Nissan, Maxima      F                     With groove, #425 Cast Number
Nissan,                    S     .003-.005      No groove
Nissan 1.6 & 2.0L    S     .006-.010      Sentra, Stanza
Nissan, B2000         C     .807 new       Max stock removel .020
Nissan, 240Z           S     .010           With groove
Peugeot                   S     .020           
Renault                    S     .014-.021      1.4L Alliance
Saab, 96                  C     .656
Subaru                     C     .830           Justy
Subaru                     C     .875
Subaru                     C     .905           4X4 Brat
Subaru                     C     .930
Suzuki                      C     .070
Suzuki                      C     .197           1.0L, 3 cyl
Toyota                     S     .018-.022      Large alignment pins
Toyota, 22RE          S     .018-.022      #627 Cast Number
Toyota                     C     .055           Small cup
Toyota                     C     .965-.970      Tercel, large cup
Toyota                     S     .040           Tercel, 3E engine
Toyota                     S     .015           3VZE engine
Toyota                     S     .020           Land Cruiser
Volvo                       C     .947           B230F engine
VW                           C     .945           Air cooled, 6 Volt
VW                           C     .913-.918      210MM Clutch
VW                           C     .830-.835      Rabbit,Golf,Scirocco
Vanagon                  C     .982           Water/Air cooled bus engine
VW                            C     .830           Air cooled engine
VW                            C     .885           Air cooled engine

                                  C = Cup, S = Step, F= Flat

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
 COOLANT IN THE ENGINE OIL SUPPLY
                                       Coolant In The Oil On
                                  Toyota 20R & 22R Engines

AERA members have reported instances of engine coolant mixing with the engine lubricating oil supply.

In some of these cases, pressure testing the cylinder block and head has not identified the source of the leak.  However, close inspection of the aluminum front cover revealed an area where the timing chain wore through into a water passage.  

In this engine the water pump is mounted to the front cover.  When the timing chain stretches and the automatic tensioner is no longer able to take up the slack, the loose chain can slap against the front cover.  Continuous contact will eventually wear a hole into the front cover, introducing engine coolant into the
crankcase.

                                                                      The AERA Technical Committee