Mazda RX7. Manual — part 88

1.2L HARD CRANK/NO START - CARBON IN ROTOR/HOUSING CAT. 1, NO. 103/83

Article Text

1983 Mazda RX7

For www.iluvmyrx7.com

Copyright © 1998 Mitchell Repair Information Company, LLC

Saturday, September 08, 2001 09:17AM

ARTICLE BEGINNING

TECHNICAL SERVICE BULLETIN

HARD CRANKING

Models RX7
Bulletin No. 103/83
Category 1
Date 5/7/83
Symptom Hard Cranking/No Start

DESCRIPTION

If RX-7 vehicles have not been in use for a long period of time and
the engine is cranked with a weak battery, hard cranking may occur due
to carbon trap.
When the vehicles have been stored for such a long period of time
carbon accumulated on the rotor surface may be flaked off, and it can
be trapped between the rotor and rotor housing by the sweeping motion
of the apex seals only when the engine is started. It will not occur
when the engine is running.
To verify carbon trap, the following two conditions must be
confirmed:
l) The problem occurred when the engine was started.
2) The apex seal can be observed through one of the leading spark
plug holes. (If carbon trap occurs, the rotor will always stop
at this location).

If carbon trap is verified, please use the following procedure:

Procedure:

I. For vehicles with manual transmission:
1) Disconnect the negative battery cable and remove the spark
plugs.
2) Hoist the vehicle, remove the starter and install the Fly-
wheel Turning Tool, P/N 49FA 42 065. This special tool is
newly established for vehicles with manual transmission.
3) Turn the Flywheel Turning Tool counterclockwise (as shown
in Fig. 1 until the force is reduced considerably).

CAUTION: Do not turn the Flywheel in the direction of normal engine
rotation.

Fig. 1: View of Flywheel Turning tool (49FA 42 065)

4) Remove the special tool (Fig. 2) and reinstall the starter.

1.2L HARD CRANK/NO START - CARBON IN ROTOR/HOUSING CAT. 1, NO. 103/83

Article Text (p. 2)

1983 Mazda RX7

For www.iluvmyrx7.com

Copyright © 1998 Mitchell Repair Information Company, LLC

Saturday, September 08, 2001 09:17AM

Fig. 2: Using Flywheel Turning Tool

5) Lower the vehicle. Turn the front pulley clockwise, facing
the rear of the car, with a l9mm wrench. At the same time,
inject 20-30 cc of engine oil through carburetor. Do not
exceed the specified quantity of oil.
6) Turn the engine approximately five (5) revolutions to make
certain the engine rotates freely.

NOTE: Do not use the starter to rotate the engine.

7) Install the spark plugs.
8) Check that the battery is fully charged.
9) Start the engine and warm up to normal operating
temperature.
10) Stop the engine. Remove the spark plugs and check
compression. If the compression is over 6.0 kg/cm

ý

, the

repair is completed.

II. For vehicles with automatic transmission:
1) Disconnect the negative battery cable and remove the spark
plugs.
2) Remove the inspection plate from the converter housing.
(Fig. 3).

Fig. 3: Removing Inspection Plate From Convertor Housing

3) Insert a standard screwdriver through the inspection hole.
Turn the flywheel by prying against the flywheel teeth and
converter housing as shown until the force is reduced
considerably.

1.2L HARD CRANK/NO START - CARBON IN ROTOR/HOUSING CAT. 1, NO. 103/83

Article Text (p. 3)

1983 Mazda RX7

For www.iluvmyrx7.com

Copyright © 1998 Mitchell Repair Information Company, LLC

Saturday, September 08, 2001 09:17AM

CAUTION: Do not turn the flywheel in the direction of normal engine
rotation.

4) Follow the procedure in I, steps 5-10.

END OF ARTICLE

1.3L ENG CLUTCH VIB - REPL FLYWHEEL ALIGNMENT PINS CAT. 6, NO. 002/86

Article Text

1983 Mazda RX7

For www.iluvmyrx7.com

Copyright © 1998 Mitchell Repair Information Company, LLC

Saturday, September 08, 2001 09:18AM

ARTICLE BEGINNING

TECHNICAL SERVICE BULLETIN

CLUTCH ALIGNMENT PINS

Models 1983-86 RX-7
Bulletin No. 002/86
Category 6
Date 4/8/86
Symptom Clutch Vibration

DESCRIPTION

Replacement flywheels for the 1983-1986 RX-7 are shipped without
clutch alignment pins. These pins are necessary to accurately align
the clutch cover to the flywheel during assembly. Failure to use the
alignment pins will result in vibration of the flywheel and clutch
assembly. See Fig. 1.
When replacing the flywheel, please order the pin by the part
number listed below.

Fig. 1: 83-86 RX7 Flywheel and Alignment Pins

PARTS INFORMATION

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PART NUMBER DESCRIPTION QTY

9923 30 825 Knock Pin 3

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END OF ARTICLE