INTRODUCTION
Use this article to quickly find specifications related to servicing and on-vehicle adjustments. This is a quick-reference article for when you are familiar with an adjustment procedure and only need a specification.
BATTERY SPECIFICATIONS
| Application | Amp Hr. Rating |
|---|
| ES250 | 48 |
| LS400 | 64 |
FLUID CAPACITIES - ES250
| Application | Quantity Qts. (L) |
|---|
| Automatic Transaxle (Dexron-II) |
| Dry Fill | 6.5 (6.2) |
| Drain & Refill | 2.6 (2.5) |
| Automatic Transaxle Differential (Dexron-II) | 1.1 (1.0) |
| Cooling System (Includes Heater) | 10 (9.5) |
| Crankcase (Includes Filter) | 4.1 (3.9) |
| Manual Transaxle (SAE 80W-90/API GL-4 or GL-5) | 4.4 (4.2) |
FLUID CAPACITIES - LS400
| Application | Quantity Qts. (L) |
|---|
| Automatic Transmission (T-II ATF) |
| Dry Fill | 8.7 (8.2) |
| Drain & Refill | 2.1 (2.0) |
| Cooling System (Includes Heater) | 11.2 (10.6) |
| Crankcase (Includes Filter) | 5.6 (5.3) |
| Differential (SAE 80W-90/API GL-5) | 1.4 (1.3) |
Replacement Intervals
| Component | Miles |
|---|
| Accessory Drive Belts | 60,000 |
| Air Filter | 30,000 |
| Coolant | 45,000 |
| Fuel Filter | 30,000 |
| Oil & Filter | (1) 7500 |
| Spark Plugs | 60,000 |
| (1) Every 3750 miles for severe service. |
| (1) | Every 3750 miles for severe service. |
Drive Belt Adjustment
| Application | (1) Lbs. (kg) |
|---|
| ES250 |
| Alternator |
| New | 180-185 (81-83) |
| Used (2) | 95-135 (43-61) |
| Power Steering |
| New | 100-150 (45-68) |
| Used (2) | 60-100 (27-45) |
| LS400 |
| Serpentine Belt | Automatic Tensioner |
| (1) Using Borroughs Tension Gauge. (2) For belt that has been used on running engine for 5 minutes or more. |
| (1) | Using Borroughs Tension Gauge. |
| (2) | For belt that has been used on running engine for 5 minutes or more. |
ENGINE COMPRESSION
To check engine compression, bring engine to normal operating temperature. On LS400 models, disconnect cold start injector. On all models, disconnect distributor electrical connector(s). Remove all spark plugs. Remove air intake hose from throttle body and fully open throttle. Measurement should be done at 250 RPM in as short a time as possible.
| Application | Specification |
|---|
| Compression Ratio |
| ES250 | 9.0:1 |
| LS400 | 10.0:1 |
| Compression Pressure | 178 psi (12.5 kg/cm 2 ) |
| Minimum Compression Pressure | 142 psi (10 kg/cm 2 ) |
| Maximum Variation Between Cylinders | 14 psi (1.0 kg/cm 2 ) |
COMPRESSION SPECIFICATIONS
VALVE CLEARANCE
| Application | (1) In. (mm) |
|---|
| ES250 |
| Intake | .005-.009 (.13-.23) |
| Exhaust | .011-.015 (.28-.38) |
| LS400 |
| Intake | .006-.010 (.15-.26) |
| Exhaust | .010-.014 (.26-.36) |
| (1) Adjust valves with engine cold. |
| (1) | Adjust valves with engine cold. |
VALVE CLEARANCE SPECIFICATIONS
IGNITION COIL
| Application | Primary | Secondary |
|---|
| ES250 & LS400 (1) | .40-.50 | 10,200-13,800 |
| (1) LS400 has 2 ignition coils. |
| (1) | LS400 has 2 ignition coils. |
IGNITION COIL RESISTANCE - Ohms @ 68°F (20°C)
DISTRIBUTOR SENSORS
| Application | In. (mm) |
|---|
| ES250 | .008-016 (.2-.4) |
| (1) Not adjustable. If incorrect, replace distributor housing. |
| (1) | Not adjustable. If incorrect, replace distributor housing. |
ES250 DISTRIBUTOR PICK-UP COIL AIR GAP (1)
| Application | Ohms |
|---|
| ES250 |
| Pick-Up Coils | 205-255 |
| LS400 |
| No.1 & No. 2 Cam Sensors | 950-1250 |
| Engine Speed Sensor | 950-1250 |
DISTRIBUTOR SENSOR RESISTANCE
HIGH TENSION WIRE RESISTANCE
| Application | Ohms |
|---|
| ES250 & LS400 | 25,000 Maximum |
HIGH TENSION WIRE RESISTANCE
SPARK PLUGS
| Application | NGK No. |
|---|
| ES250 | BCPR6EP-11 |
| LS400 | BKR6EP-11 |
| Application | Gap In. (mm) | Torque Ft. Lbs. (N.m) |
|---|
| Maximum Wear (1) | .051 (1.3) | 13 (17) |
| New Plug | .043 (1.1) | 13 (17) |
| (1) Replace spark plug when worn past this dimension. |
| (1) | Replace spark plug when worn past this dimension. |
SPARK PLUG SPECIFICATIONS
Firing Order & Timing Marks (ES250). Scheme 1
Scheme 1: Firing Order & Timing Marks (ES250)
Firing Order & Timing Marks (LS400). Scheme 2
Scheme 2: Firing Order & Timing Marks (LS400)
Ignition Timing (Degrees BTDC @ RPM)
| Application | Auto. Trans. | Man. Trans. |
|---|
| ES250 | (1) 10 @ 650-750 | (1) 10 @ 650-750 |
| LS400 | (1) 10 @ 600-700 | N/A |
| (1) With jumper wire installed between TE1 and E1 timing check terminals. |
| (1) | With jumper wire installed between TE1 and E1 timing check terminals. |
IGNITION TIMING (Degrees BTDC @ RPM)
FUEL PUMP
Note. Fuel pump performance measures fuel pressure and volume availability, not regulated fuel pressure.
| Application | Pressure psi (kg/cm 2 ) | Min. Vol. in 30 Sec. Pts. (L) |
|---|
| ES250 & LS400 | 38-44 (2.7-3.1) | (1) |
| (1) Information not available from manufacturer |
| (1) | Information not available from manufacturer |
| Application | At Idle w/Vacuum psi (kg/cm 2 ) | At Idle w/o Vacuum psi (kg/cm 2 ) |
|---|
| ES250 | 33-37 (2.3-2.6) | 38-44 (2.7-3.1) |
| LS400 | 28-34 (2.0-2.4) | 38-44 (2.7-3.1) |
INJECTOR RESISTANCE
| Application | Ohms |
|---|
| Cold Start Injector | 2-4 |
| Fuel Injector | 13.4-14.2 |
INJECTOR RESISTANCE SPECIFICATIONS - Ohms @ 68°F (20°C)
IDLE SPEED & MIXTURE
| Application | RPM |
|---|
| ES250 |
| Auto. Trans. | 650-750 |
| Man. Trans. | 650-750 |
| LS400 | 600-700 |
IDLE SPEED SPECIFICATIONS
DASHPOT SPECIFICATION
| Application | (1) RPM |
|---|
| ES250 | (2) 2000 |
| LS400 | 1500 |
| (1) With dashpot cap and filter removed and dashpot vacuum port plugged (upper hole behind dashpot filter). (2) With cooling fan not running. |
| (1) | With dashpot cap and filter removed and dashpot vacuum port plugged (upper hole behind dashpot filter). |
| (2) | With cooling fan not running. |
DASHPOT SET SPEED SPECIFICATIONS
THROTTLE POSITION SENSOR
| Clearance Between Lever & Stop Screw | Ohmmeter Reading at Terminals IDL & E2 |
|---|
| ES250 |
| .012" (.30 mm) | Continuity |
| .028" (.70 mm) | No Continuity |
| LS400 |
| .0157" (.40 mm) | Continuity |
| .0335" (.85 mm) | No Continuity |
THROTTLE POSITION SENSOR ADJUSTMENT
