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.
