1991 MAZDA MIATA cooling

1990-91 ENGINE COOLING
Cooling System Specifications - MX-5 Miata
COOLING SYSTEM SPECIFICATIONS
COOLING SYSTEM SPECIFICATIONS
ApplicationSpecification
Coolant Replacement Interval30 Months Or 30,000 Miles
Coolant Capacity6.3 qts. (6.0L)
Pressure Cap11-15 psi (0.75-1.05 kg/cm2 )
Thermostat Open Temperature
Starts
Main Valve188-193°F (86.5-89.5°C)
Sub Valve182-188°F (83.5-86.5°C)
Fully Open212°F (100°C)
Thermostat Open Lift
Main Valve0.31" (8 mm)
Sub Valve0.06" (1.5 mm)

1991 Mazda MX-5 Miata
1990-91 ENGINE COOLING Cooling System Specifications - MX-5 Miata

1991 Mazda MX-5 Miata
1990-91 ENGINE COOLING Cooling System Specifications - MX-5 Miata
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1990-93 ENGINE COOLING
Drive Belt Routing & Adjustment - MX-5 Miata
ADJUSTMENT
Fig. 1: Identifying Correct Belt Mounting
Courtesy of MAZDA MOTORS CORP.
ALTERNATOR
Loosen alternator bolts and adjust belt deflection by turning adjusting bolt. See Fig. 2
, Fig. 6 and Fig. 7 . See
ADJUSTMENT SPECIFICATIONS
. Tighten bolts to specification. See TORQUE SPECIFICATIONS. NOTE: Ensure drive belts are not worn, cracked or frayed and are correctly mounted
on pulleys. See Fig. 1
.
NOTE: If a new belt is used, adjust belt deflection at midpoint of new belt specification.

1991 Mazda MX-5 Miata
1990-93 ENGINE COOLING Drive Belt Routing & Adjustment - MX-5 Miata

1991 Mazda MX-5 Miata
1990-93 ENGINE COOLING Drive Belt Routing & Adjustment - MX-5 Miata
Microsoft
Sunday, July 05, 2009 2:14:16 PMPage 1 © 2005 Mitchell Repair Information Company, LLC.
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Sunday, July 05, 2009 2:14:28 PMPage 1 © 2005 Mitchell Repair Information Company, LLC.

Fig. 2: Adjusting Alternator Belt
Courtesy of MAZDA MOTORS CORP.
A/C COMPRESSOR
Loosen locknut and adjust belt deflection by turning adjusting bolt. See Fig. 3
, Fig. 6 and Fig. 7 . See
ADJUSTMENT SPECIFICATIONS
. Tighten bolts to specification. See TORQUE SPECIFICATIONS.

1991 Mazda MX-5 Miata
1990-93 ENGINE COOLING Drive Belt Routing & Adjustment - MX-5 Miata
Microsoft
Sunday, July 05, 2009 2:14:16 PMPage 2 © 2005 Mitchell Repair Information Company, LLC.

Fig. 3: Adjusting A/C Compressor & Power Steering Pump Belt
Courtesy of MAZDA MOTORS CORP.

1991 Mazda MX-5 Miata
1990-93 ENGINE COOLING Drive Belt Routing & Adjustment - MX-5 Miata
Microsoft
Sunday, July 05, 2009 2:14:16 PMPage 3 © 2005 Mitchell Repair Information Company, LLC.

Fig. 4: Adjusting A/C Compressor Belt
Courtesy of MAZDA MOTORS CORP.
POWER STEERING PUMP
Loosen power steering pump bolt and nuts and adjust belt deflection by turning adjusting bolt. See Fig. 3
, Fig.
6 and Fig. 7 . See ADJUSTMENT SPECIFICATIONS . Tighten bolts to specification. See TORQUE
SPECIFICATIONS .
DRIVE BELT ROUTING

1991 Mazda MX-5 Miata
1990-93 ENGINE COOLING Drive Belt Routing & Adjustment - MX-5 Miata
Microsoft
Sunday, July 05, 2009 2:14:16 PMPage 4 © 2005 Mitchell Repair Information Company, LLC.

Fig. 5: Identifying Drive Belt Routing & Deflection Check Point (1 Of 3)
Courtesy of MAZDA MOTORS CORP.

1991 Mazda MX-5 Miata
1990-93 ENGINE COOLING Drive Belt Routing & Adjustment - MX-5 Miata
Microsoft
Sunday, July 05, 2009 2:14:16 PMPage 5 © 2005 Mitchell Repair Information Company, LLC.

Fig. 6: Identifying Drive Belt Routing & Deflection Check Point (2 Of 3)
Courtesy of MAZDA MOTORS CORP.

1991 Mazda MX-5 Miata
1990-93 ENGINE COOLING Drive Belt Routing & Adjustment - MX-5 Miata
Microsoft
Sunday, July 05, 2009 2:14:16 PMPage 6 © 2005 Mitchell Repair Information Company, LLC.

Fig. 7: Identifying Drive Belt Routing & Deflection Check Point (3 Of 3)
Courtesy of MAZDA MOTORS CORP.
ADJUSTMENT SPECIFICATIONS
DEFLECTION SPECIFICATIONS
NOTE: Check belt deflection when engine is cold, or has bin off for 30 minutes.
Application(1) Specification - In. (mm)
New Belt (2)
Alternator0.31-0.35 (8-9)
A/C Compressor0.31-0.35 (8-9)
Power Steering Pump0.31-0.35 (8-9)
Used Belt
Alternator0.35-0.39 (9-10)
A/C Compressor0.35-0.39 (9-10)
Power Steering Pump0.35-0.39 (9-10)
(1)Deflection with 22 lbs. (10 kg) pressure applied midway on belt run.
Used on for less than 5 minutes.

1991 Mazda MX-5 Miata
1990-93 ENGINE COOLING Drive Belt Routing & Adjustment - MX-5 Miata
Microsoft
Sunday, July 05, 2009 2:14:16 PMPage 7 © 2005 Mitchell Repair Information Company, LLC.