1997 MAZDA MX-5 torque spec

OIL PUMP
Removal & Disassembly
1. Disconnect negative battery cable. Remove dipstick, tube and "O" ring. Drain engine oil and coolant.
Remove drive belts, crankshaft and water pump pulleys. Remove generator, A/C compressor and
mounting bracket. Without disconnecting A/C hoses, secure A/C compressor away from engine. Remove
timing belt and related components. See TIMING BELT
under REMOVAL & INSTALLATION.
2. Hold crankshaft sprocket in place and remove crankshaft sprocket bolt. Remove crankshaft sprocket
using steering wheel puller. Leave crankshaft Woodruff key in place.
3. Remove oil pan and oil pump pick-up tube. See OIL PAN
under REMOVAL & INSTALLATION.
Remove oil pump housing assembly. Using a screwdriver protected with a rag, drive oil seal out from
inside of oil pump housing assembly.
4. Remove pump cover screws (use a manual impact screwdriver, if necessary). See Fig. 22
. Remove pump
cover. Note location of alignment marks on inner and outer rotors. Remove inner and outer rotors. To
remove pressure relief valve, remove spring seat, pressure spring and control plunger.
Inspection
Replace pressure relief valve spring if length is not as specified. See OIL PUMP SPECIFICATIONS. Ensure
plunger slides freely in bore. Replace oil pump housing assembly if clearances are not as specified. See OIL
PUMP SPECIFICATIONS .
Reassembly & Installation
1. Apply oil to friction surfaces. Install inner and outer rotors with marks aligned. See Fig. 23 . Install
pressure relief valve components. Apply oil to lip of NEW oil seal. Press oil seal into bore until even with
face of oil pump housing assembly.
2. Install pump cover. Tighten screws to 53-78 INCH lbs. (6-9 N.m). To complete installation, reverse
removal procedure. Tighten bolts to specification. See TORQUE SPECIFICATIONS
.
OIL PUMP SPECIFICATIONS
ApplicationW/O Filter Qts. (L)W/Filter Qts. (L)
Miata & Protege3.8 (3.6)4.0 (3.8)
ApplicationMaximum Clearance In. (mm)
Maximum Rotor Tip Clearance (1) .0079 (.20)
Maximum Rotor-To-Pump Body Clearance (2) .0079 (.20)
Maximum Rotor Side Clearance (3) .0055 (.14)
Pressure Relief Spring Free Length1.809 (45.94)
(1)See Fig. 23 .
(2)Insert feeler gauge between outer rotor and pump body.
Place straightedge across pump body and check clearance between straightedge and both rotors.

1997 Mazda MX-5 Miata
1997-98 ENGINES 1.8L 4-Cylinder
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Sunday, July 05, 2009 1:55:15 PMPage 33 © 2005 Mitchell Repair Information Company, LLC.

Fig. 23: Aligning Marks On Inner & Outer Rotor
Courtesy of MAZDA MOTORS CORP.
TORQUE SPECIFICATIONS
TORQUE SPECIFICATIONS
ApplicationFt. Lbs. (N.m)
Axle Shaft Nut (Protege)174-235 (235-319)
Camshaft Sprocket Bolt36-45 (49-61)
Compressor Bracket-To-Engine Bolt28-38 (38-51)
Connecting Rod Cap Nut35-37 (48-50)
Crankshaft Pulley Bolts9-13 (12-18)
Crankshaft/Timing Belt Sprocket Bolt116-123 (157-167)
Crossmember-To-Frame Bolt47-66 (63-89)
Cylinder Head Bolt (2) 56-60 (76-81)
Distributor Bolt14-19 (19-26)
Drive Shaft Bolts (Miata)37-43 (50-58)
Engine Mount Nut42-58 (57-79)
Engine Mount-To-Engine Bolt27-40 (37-54)
Engine Mount-To-Frame Nut
Miata42-57 (57-77)
Protege28-38 (38-51)
Exhaust Header Pipe-To-Exhaust

1997 Mazda MX-5 Miata
1997-98 ENGINES 1.8L 4-Cylinder
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Sunday, July 05, 2009 1:55:15 PMPage 35 © 2005 Mitchell Repair Information Company, LLC.

CRANKSHAFT, MAIN & CONNECTING ROD BEARINGS
CRANKSHAFT, MAIN & CONNECTING ROD BEARINGS
CONNECTING RODS
ApplicationSpecification
Displacement112.2 Cu. In. (1.8L)
Bore3.27" (83.0 mm)
Stroke3.35" (85.0 mm)
Compression Ratio
Miata9.0:1
Protege8.9:1
Fuel SystemPFI
Horsepower @ RPM
Miata128 @ 6500
Protege103 @ 5500
Torque Ft. Lbs. @ RPM
Miata110 @ 5000
Protege111 @ 4000
ApplicationIn. (mm)
Crankshaft
End Play
Standard.0032-.0111 (.080-.282)
Maximum.0118 (.30)
Maximum Runout.0016 (.04)
Main Bearings
Journal Diameter
Standard Bearings1.9661-1.9667 (49.938-49.956)
Journal Out-Of-Round.002 (.05)
Oil Clearance
Standard.0008-.0014 (.020-.036)
Maximum.004 (.10)
Connecting Rod Bearings
Journal Diameter
Standard Bearings1.7693-1.7699 (44.940-44.956)
Journal Out-Of-Round.002 (.05)
Oil Clearance
Standard.0008-.0027 (.020-.068)
Maximum.0039 (.100)

1997 Mazda MX-5 Miata
1997-98 ENGINES 1.8L 4-Cylinder
Microsoft
Sunday, July 05, 2009 1:55:15 PMPage 37 © 2005 Mitchell Repair Information Company, LLC.

Fig. 3: Checking Power Steering Pump Serpentine Belt Tension (Millenia, 2.3L)
Courtesy of MAZDA MOTORS CORP.
MILLENIA
Alternator (2.5L)
Loosen idler pulley locknut and adjust belt deflection by turning adjusting bolt. See Fig. 4 and Fig. 19 . See
ADJUSTMENT SPECIFICATIONS
. Tighten bolts to specification. See TORQUE SPECIFICATIONS.
NOTE: If a new belt is used, adjust belt deflection at midpoint of new belt specification.

1997 Mazda MX-5 Miata
1994-98 ENGINE COOLING Specifications & Drive Belt Routing - B2300, B2500, B3000, B4000, Millenia, MPV, MX-5
Miata & Protege

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Sunday, July 05, 2009 1:57:32 PMPage 4 © 2005 Mitchell Repair Information Company, LLC.

Fig. 4: Adjusting Alternator Belt (Millenia, 2.5L)
Courtesy of MAZDA MOTORS CORP.
Power Steering Pump (2.5L)
Loosen idler pulley locknut and adjust belt deflection by turning adjusting bolt. See Fig. 5 and Fig. 20 . See
ADJUSTMENT SPECIFICATIONS
. Tighten bolts to specification. See TORQUE SPECIFICATIONS.

1997 Mazda MX-5 Miata
1994-98 ENGINE COOLING Specifications & Drive Belt Routing - B2300, B2500, B3000, B4000, Millenia, MPV, MX-5
Miata & Protege

Microsoft
Sunday, July 05, 2009 1:57:32 PMPage 5 © 2005 Mitchell Repair Information Company, LLC.

Fig. 5: Adjusting Power Steering Pump Belt (Millenia, 2.5L)
Courtesy of MAZDA MOTORS CORP.
MPV
Alternator
Loosen alternator bolts and adjust belt deflection by levering generator outward and applying tension. See Fig.
6 and Fig. 21 . See ADJUSTMENT SPECIFICATIONS . Tighten bolts to specification. See TORQUE
SPECIFICATIONS .
NOTE: If a new belt is used, adjust belt deflection at midpoint of new belt specification.

1997 Mazda MX-5 Miata
1994-98 ENGINE COOLING Specifications & Drive Belt Routing - B2300, B2500, B3000, B4000, Millenia, MPV, MX-5
Miata & Protege

Microsoft
Sunday, July 05, 2009 1:57:32 PMPage 6 © 2005 Mitchell Repair Information Company, LLC.

Fig. 6: Adjusting Alternator Belt (MPV)
Courtesy of MAZDA MOTORS CORP.
A/C Compressor
Loosen locknut and adjust belt deflection by turning adjusting bolt. See Fig. 7 and Fig. 23 . See
ADJUSTMENT SPECIFICATIONS
. Tighten bolts to specification. See TORQUE SPECIFICATIONS.

1997 Mazda MX-5 Miata
1994-98 ENGINE COOLING Specifications & Drive Belt Routing - B2300, B2500, B3000, B4000, Millenia, MPV, MX-5
Miata & Protege

Microsoft
Sunday, July 05, 2009 1:57:32 PMPage 7 © 2005 Mitchell Repair Information Company, LLC.

Fig. 7: Adjusting A/C Compressor Belt (MPV)
Courtesy of MAZDA MOTORS CORP.
Power Steering Pump
Loosen locknut and adjust belt deflection by turning adjusting bolt. See Fig. 8 and Fig. 22 . See
ADJUSTMENT SPECIFICATIONS
. Tighten bolts to specification. See TORQUE SPECIFICATIONS.

1997 Mazda MX-5 Miata
1994-98 ENGINE COOLING Specifications & Drive Belt Routing - B2300, B2500, B3000, B4000, Millenia, MPV, MX-5
Miata & Protege

Microsoft
Sunday, July 05, 2009 1:57:32 PMPage 8 © 2005 Mitchell Repair Information Company, LLC.