1997 MAZDA MX-5 fuel

differential housing block.
2. Tighten PPF/differential mounting spacer bolts to 28-38 ft. lbs. (38-52 N.m). See Fig. 4
. Install PPF to
differential. Hand-tighten long bolts. Ensure PPF-to-differential large shank reamer bolt and spacer are
properly installed.
3. When PPF is properly aligned between transmission and differential, tighten all long mounting bolts to
specification. Install rear transmission-to-PPF bracket and tighten to specification. See TORQUE
SPECIFICATIONS . To complete installation, reverse removal procedure. Before installing M/T shift
lever, add gear oil to transmission through shifter hole. Fill all fluids to correct level. Prime fuel system
before attempting to start engine. See FUEL PRESSURE RELEASE & PRIMING. Bleed cooling system.
See COOLING SYSTEM BLEEDING.
Fig. 4: Locating PPF
-To-Differential Reamer Bolt, Sleeve & Spacer
NOTE: Reamer bolt is the front long bolt attaching PPF to differential. This bolt
aligns PPF with drive train.

1997 Mazda MX-5 Miata
1997-98 ENGINES 1.8L 4-Cylinder
Microsoft
Sunday, July 05, 2009 1:55:15 PMPage 6 © 2005 Mitchell Repair Information Company, LLC.

Courtesy of MAZDA MOTORS CORP.
Removal & Installation (Protege)
1. Release residual pressure from fuel system. See FUEL PRESSURE RELEASE & PRIMING .
Disconnect negative battery cable. Reference mark and remove hood. Raise vehicle. Remove engine
undercover and side covers. See Fig. 5
. Drain engine, transaxle and cooling system fluids. Remove front
wheels.

1997 Mazda MX-5 Miata
1997-98 ENGINES 1.8L 4-Cylinder
Microsoft
Sunday, July 05, 2009 1:55:15 PMPage 7 © 2005 Mitchell Repair Information Company, LLC.

Fig. 5: Removing Engine Components (Protege)
Courtesy of MAZDA MOTORS CORP.
2. Lower vehicle. Remove air cleaner assembly. Remove battery/carrier assembly. Remove throttle cable
and air intake duct across radiator (if equipped).
3. Remove all drive belts. DO NOT disconnect power steering hoses or A/C compressor hoses. Unbolt
power steering pump and A/C compressor from engine, and wire aside.
4. Note locations and disconnect all necessary electrical connectors, ground wires, vacuum hoses, fuel
hoses, coolant hoses and control cables for engine removal.
5. Plug all fuel hoses to avoid leakage. Attach engine support bar or engine hoist to secure engine. Raise
vehicle. Disconnect exhaust manifold down pipe and exhaust brackets from engine. On A/T models,
remove shift control cable.
6. On M/T models, remove shift control linkage and extension bar. Remove clutch release cylinder and fluid
line bracket from transaxle housing, leaving fluid line connected to cylinder. Secure cylinder away from
transaxle.
7. On all models, remove transmission wiring harness connectors and speedometer cable. Remove axle shaft
nuts from hubs. Disconnect stabilizer bar from lower control arms. Separate lower ball joints and steering
tie-rod ends from steering knuckles.
8. Pry axle shafts out of transaxle. Remove and discard circlip from axle shafts. For further information on
axle shafts, see appropriate article in DRIVE AXLES.
9. Remove transaxle mount nuts from crossmember and loosen crossmember bolts. See Fig. 6
. Lower
vehicle and attach engine hoist for engine removal. Remove engine front mount and transaxle top mount
from inner fender panels. Remove transaxle crossmember. Remove engine and transaxle assembly from
top of vehicle.
10. To install, reverse removal procedure. Tighten bolts and nuts to specifications. See TORQUE
SPECIFICATIONS . Fill all fluids to correct level. Prime fuel system before attempting to start engine.
See FUEL PRESSURE RELEASE & PRIMING
. Bleed cooling system. See COOLING SYSTEM
BLEEDING.

1997 Mazda MX-5 Miata
1997-98 ENGINES 1.8L 4-Cylinder
Microsoft
Sunday, July 05, 2009 1:55:15 PMPage 8 © 2005 Mitchell Repair Information Company, LLC.

Fig. 6: Removing Engine Mounts (Protege)
Courtesy of MAZDA MOTORS CORP.
INTAKE MANIFOLD
Removal
1. Release residual pressure from fuel system. See FUEL PRESSURE RELEASE & PRIMING .
Disconnect negative battery cable. Drain cooling system. Remove air cleaner assembly and ducting. See
Fig. 3
or Fig. 5 . Mark and disconnect coolant hoses, vacuum hoses and electrical connectors from intake
manifolds.

1997 Mazda MX-5 Miata
1997-98 ENGINES 1.8L 4-Cylinder
Microsoft
Sunday, July 05, 2009 1:55:15 PMPage 9 © 2005 Mitchell Repair Information Company, LLC.

2. Disconnect throttle cable. Remove fuel lines from fuel rail and pressure regulator. Remove throttle body
intake duct housing and throttle body. Remove by-pass air control valve and solenoid valves. Remove
upper intake manifold (if equipped).
3. Remove intake manifold support bracket from underneath manifold. Disconnect injector harness
connectors, and remove injectors/fuel rail assembly. Remove intake manifold and gasket.
Installation
1. Ensure all gasket surfaces are clean and flat. Using NEW gasket, install intake manifold to cylinder head.
Tighten manifold bolts/nuts evenly to specification, starting from center bolt and alternating outward. See
TORQUE SPECIFICATIONS
. Install support bracket underneath intake manifold.
2. Install gasket and upper intake manifold (if equipped). Tighten bolts/nuts evenly to specification,
alternating from top to bottom. See TORQUE SPECIFICATIONS
.
3. To complete installation, reverse removal procedure. Ensure throttle cable has .04-.12" (1-3 mm) free
play. Ensure injectors twist freely and are not cocked in insulator "O" rings. Refill engine with coolant.
EXHAUST MANIFOLD
Removal & Installation
1. Remove air cleaner intake duct from top of radiator/fan assembly (if equipped). Disconnect oxygen
sensor. Remove heat shields. Disconnect down pipe from exhaust manifold. Remove exhaust manifold.
2. To install, reverse removal procedure. Ensure all mating surfaces are clean and flat. Install NEW exhaust
manifold gasket to cylinder head. Tighten manifold bolts evenly to specification, starting from center bolt
and alternating outward. See TORQUE SPECIFICATIONS
.
CYLINDER HEAD
Removal
1. Release residual pressure from fuel system. See FUEL PRESSURE RELEASE & PRIMING . Drain
engine coolant. Note locations and disconnect all necessary electrical connectors, ground wires, vacuum
hoses, fuel hoses, coolant hoses and control cables for cylinder head removal. Plug all fuel hoses to avoid
leakage.
2. Remove spark plug wires from spark plugs. Remove all drive belts. Remove water pump pulley. Remove
timing belt. See TIMING BELT
. Remove camshaft/rocker cover.
3. Remove front exhaust pipe. Remove intake manifold support bracket. Loosen all cylinder head bolts
evenly, in 3 steps, in reverse of tightening sequence. See Fig. 7
. Remove bolts and cylinder head
assembly.
Inspection
Carefully clean carbon and gasket material from all mating surfaces. Clean threads of cylinder head bolts. Use a
tap to clean threads in engine block. Check cylinder head for warpage. Resurface or replace head if it is not
within specification. Check valve train components. Replace or resurface components if they are not within

1997 Mazda MX-5 Miata
1997-98 ENGINES 1.8L 4-Cylinder
Microsoft
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ENGINE SPECIFICATIONS
GENERAL SPECIFICATIONS
Manifold Nut23-34 (31-46)
Exhaust Manifold Nut(1) 28-34 (38-46)
Flywheel Bolt71-76 (96-103)
Fuel Rail Bolt14-19 (19-26)
Generator Top Bolt27-38 (37-51)
Intake Manifold Bolt/Nut(1) 14-19 (19-26)
Intake Manifold Support Bracket14-18 (19-25)
Main Bearing Cap Bolt
Step 1(1) 22-27 (30-37)
Step 2 (Final)(1) 40-43 (54-58)
Oil Pan-To-Transaxle Bolt (Protege)28-38 (38-51)
Oil Pan-To-Transmission Bolt (Miata)48-65 (64-88)
Oil Pump-To-Block Bolt14-19 (19-26)
Power Steering Pump-To-Bracket Bolt28-38 (38-51)
PPF/Differential Spacer Mounting Bolt (2) 27-38 (37-51)
PPF-To-Differential Long Mounting Bolt (2) 77-91 (104-123)
PPF-To-Transmission Side Mounting Bolt (2) 77-91 (104-123)
PPF/Transmission Rear Bracket Mounting Bolt27-40 (37-54)
Spark Plug11-16 (15-22)
Timing Belt Tensioner Bolt27-38 (37-51)
Water Pump Bolt14-19 (19-26)
INCH Lbs. (N.m)
Camshaft Bearing Cap Bolt(3) 100-125 (11.3-14.1)
Cylinder Head Cover Bolt43-78 (5-9)
Oil Jet104-156 (12-18)
Oil Pan-To-Engine Block Bolt
(Miata & Protege)70-95 (8-11)
Oil Pump Cover Screws53-78 (6-9)
Oil Strainer Bolt70-95 (8-11)
Rear Cover Bolt70-95 (8-11)
Water Pump Pulley Bolt70-95 (8-11)
(1)Tighten evenly to specification in alternating sequence.
(2)Tighten in sequence. See Fig. 7 .
(3)Tighten in sequence. See Fig. 10 or Fig. 11 .

1997 Mazda MX-5 Miata
1997-98 ENGINES 1.8L 4-Cylinder
Microsoft
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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
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FLUID CAPACITIES
FLUID CAPACITIES
WHEEL & TIRE SPECIFICATIONS
WHEEL TIGHTENING
Tighten wheel lug nuts to 65-87 ft. lbs. (88-118 N.m).
BATTERY SPECIFICATIONS
Vehicle is equipped with a special 9 9/16" x 4 3/4" x 7 3/8" 12-volt battery that is vented to outside of vehicle.
CAUTIONS & WARNINGS
SUPPLEMENTAL RESTRAINT SYSTEM (AIR BAG)
Modifications or improper maintenance, including incorrect removal and installation of the Supplemental
Restraint System (SRS), can adversely affect system performance. DO NOT cover, obstruct or change the
steerin
g wheel horn pad in any way, as such action could cause improper function of the system. Use only plain
(1)Energy conserving oils are recommended, API classification SG", "SH".
ItemConditionSpecification (1)
Engine OilDrained, With Filter4.0 Qts. (3.8L)
Engine OilDrained3.8 Qts. (3.6L)
Engine CoolantDrained6.3 Qts. (6.0L)
Automatic Transaxle FluidCapacity7.1 Qts. (6.7L)
Manual Transaxle FluidCapacity2.1 Qts. (2.0L)
Rear Axle OilCapacity1.1 Qts. (l.0L)
A/C RefrigerantEvacuated1 lb. 3.4 oz. (0.6kg)
Fuel TankCapacity12.6 Gal. (48.0L)
(1)Capacities are recommended or calculated levels. Always use dipstick (if available) to measure level.
CAUTION: When battery is disconnected, vehicles equipped with computers may
lose memory data. When battery power is restored, driveability problems
may exist on some vehicles. These vehicles may require a relearn
procedure. See COMPUTER RELEARN PROCEDURES article in the
GENERAL INFORMATION Section.
NOTE: See the AIR BAG RESTRAINT SYSTEM article in the ACCESSORIES/SAFETY
EQUIPMENT Section.

1997 Mazda MX-5 Miata
MAINTENANCE INFORMATION 1997 MAINTENANCE Mazda Maintenance Information
Microsoft
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