Mazda RX7. Manual — part 109

CATALYST PELLETS & MODIFICATION OF SECONDARY AIR SYS

Article Text (p. 8)

1983 Mazda RX7

For www.iluvmyrx7.com

Copyright © 1998 Mitchell Repair Information Company, LLC

Saturday, September 08, 2001 09:59AM

moving.
4. Measure the clearance between the lock nut and the bracket
(clearance "A" in Fig. 4).

NOTE: The clearance should be 0.04-0.08 in.

Fig. 4: Measuring Clearance Between Lock Nut and Bracket

5. If it is not within the specification, adjust it by turning
the lock nut.
6. Install the lock spring.
7. Remove the air cleaner cover.
8. Confirm the choke valve is fully open. (Pull the choke valve
softly with your finger (as shown in Fig. 5) and confirm it
will not open further.) If it moves, repeat the adjustment at
Step 5 to get the specified clearance of "A".

Fig. 5: Checking Choke Valve Opening

9. Re-install the air cleaner cover.

III. Air Control Valve (ACV)

CATALYST PELLETS & MODIFICATION OF SECONDARY AIR SYS

Article Text (p. 9)

1983 Mazda RX7

For www.iluvmyrx7.com

Copyright © 1998 Mitchell Repair Information Company, LLC

Saturday, September 08, 2001 09:59AM

1. Remove the hot air duct. See Fig. 6.

Fig. 6: Hot Air Duct Location

2. Disconnect the air hose between the air cleaner and the air
control valve. See Fig. 7.

Fig. 7: Disconnecting Air Hose Between Air Cleaner and ACV

3. Slide the clamp on the air pump side of the air hose back
down the hose. See Fig. 8.

CATALYST PELLETS & MODIFICATION OF SECONDARY AIR SYS

Article Text (p. 10)

1983 Mazda RX7

For www.iluvmyrx7.com

Copyright © 1998 Mitchell Repair Information Company, LLC

Saturday, September 08, 2001 09:59AM

Fig. 8: Sliding Clamp on Air Hose (Air Control Valve Side)

4. Remove the air control valve and the air hose.
5. Remove the check valve from air control valve.

CAUTION: The check valve may fall out when ACV is removed. Be sure
to retrieve and set back in place before re-installing.
See Fig. 9.

Fig. 9: Proper Check Valve Orientation

6. Remove the cap and switching valve as shown in Fig. 10.

CATALYST PELLETS & MODIFICATION OF SECONDARY AIR SYS

Article Text (p. 11)

1983 Mazda RX7

For www.iluvmyrx7.com

Copyright © 1998 Mitchell Repair Information Company, LLC

Saturday, September 08, 2001 09:59AM

Fig. 10: Removing Cap and Switching Valve

7. Enlarge the hole as shown in Fig. 11 with the 4.2 mm drill
bit provided.

Fig. 11: Location of Hole for Enlargement

8. Blow the chips off with an air gun. See Fig. 12