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Mazda RX7. Manual - part 89

BAD SHUTTER VALVE CAUSES ROUGH IDLE/NO IDLE

Article Text

1983 Mazda RX7

For www.iluvmyrx7.com

Saturday, September 08, 2001 10:03AM

ARTICLE BEGINNING

TECHNICAL INFORMATION TIP

ROTARY ROUGH IDLE

YEAR(S): 1982-85
MANUFACTURER: Mazda
MODELS: RX-7
DATE OF ISSUE: June 1993

ISSUE: BAD SHUTTER VALVE CAUSES ROUGH IDLE/NO IDLE

A bad shutter valve may cause a rough or no idle on 1982-85
Mazda RX-7 models. To test the shutter valve, remove the hose from the
valve (it's located below the carburetor) and check for vacuum. If
there is vacuum at idle, the shutter valve is bad and should be
replaced.

Another thing to check that may be causing your idle problems is
the vacuum hose that leads from the carburetor to the AA valve. This
large hose may be burned or split at the bend in the hose near the
intake manifold and can introduce a large vacuum leak if it's leaking.

Courtesy of Import Service Magazine
with thanks to:

Bill Jasper
Charles Levy Motor Company
Columbus, Georgia

REFERENCE NUMBER: MAZ0518AP

NOTE: This information has been obtained from sources generally
believed to be reliable. Use your own judgment before relying
on this data. Neither the suppliers of these Technical
Information Tips, nor Mitchell International, guarantees or
assumes responsibility for data accuracy or completeness, nor
is liability assumed by the suppliers of these Technical
Information Tips or Mitchell International for any claims or
damages resulting from the use of this information.

END OF ARTICLE

ENGINE STAND ADAPTOR MODIFICATIONS CAT. 40, NO. 025/88

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1983 Mazda RX7

For www.iluvmyrx7.com

Saturday, September 08, 2001 09:18AM

ARTICLE BEGINNING

TECHNICAL SERVICE BULLETIN

ENGINE STAND ADAPTOR MODIFICATION

Model: All Models
Bulletin No.: 023/88
Date: 10/28/88
Category: 40

DESCRIPTION

With the introduction of universal engine hanger (49L0-10-1A0), a
slight modification will be necessary on some types of engine stand
adaptors.

If you currently use engine stand adaptor 0000-41-001C or 0000-41-
001R, the following modifications is needed to obtain adequate bolt
clearance for the universal engine hanger. If you use the older style
engine stand adaptor (0000-41-001H), no modification is required.

Fig. 1: Engine Stand Adaptor Modification

END OF ARTICLE

FILLING COOLING SYSTEM CAT. 3, NO. 008/87

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1983 Mazda RX7

For www.iluvmyrx7.com

Saturday, September 08, 2001 09:18AM

ARTICLE BEGINNING

TECHNICAL SERVICE BULLETIN

ENGINE COOLANT

Model: ALL MODELS
Bulletin No.: 008/87
Date: 7/16/87
Category: 3

DESCRIPTION

The proper level for the coolant is between the "FULL" and "LOW" marks
on the coolant reservoir. If the level is below the "LOW" mark when
the engine is cool, add enough 50/50 mixture of water and ethylene
glycol anti-freeze mix to bring the level up to or near the "FULL"
mark. Do not overfill.

In addition to freezing protection, ethylene glycol provides corrosion
protection for aluminum engine parts.

Fig. 1: View of Coolant Reservoir

CAUTION WHEN ADDING COOLANT

1. If water only is added, the mixture ratio of coolant will be
reduced, which may result in the following:

* Rust or corrosion in the engine.
* Water leakage or overheating caused by rust or corrosion in the
radiator.
* Water leakage due to corrosion of the water pump at the seal.

2. If the reservoir is overfilled, a rise in coolant temperature will
cause expansion of the coolant volume, which will allow some
coolant to overflow. The customer may misunderstand this overflow
to be a mechanical problem.

CAUTION WHEN REPLACING COOLANT

After replacement, set the heater control lever to the "HOT" position
and warm up the engine to the normal operating temperature (Thermostat

FILLING COOLING SYSTEM CAT. 3, NO. 008/87

Article Text (p. 2)

1983 Mazda RX7

For www.iluvmyrx7.com

Saturday, September 08, 2001 09:18AM

fully open). Check that there are no coolant leaks.

Add additional coolant as needed so that the radiator is full and the
coolant level is at the "FULL" mark on the coolant reservoir.

NOTE: If you encounter a reservoir bottle that is empty, it is likely
that the level of coolant inside the radiator is also low. In
such a case always....

1. Wait until the engine is cool and then remove the radiator cap. Add
coolant as needed to bring the level inside the radiator up to
full.
2. Pressure check the radiator and radiator. Also perform general
check of coolant system.

END OF ARTICLE

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