Nissan Maxima 1990 Car Engine Block Heater PDF Installation Instructions

TOOLS REQUIRED:
Phillips tip screwdriver
24mm combination wrench
10mm socket and ratchet
24mm socket
12mm Hex bit w/universal joint
Torque wrench
and extension
Cutting pliers

INSTALLATION PRECAUTIONS/NOTES:
• Be careful not to damage engine block threads when removing freeze plug or installing block heater.
• Handle engine block heater with care to avoid damaging the threads.
• Do not over-torque engine block heater.
• Ensure that power cord doesn’t contact exhaust pipes, sharp edges or vehicle moving parts.
• Torque removed vehicle parts to proper specifications

PROCEDURE
1. Remove engine undercover on right side only.
2. After the engine coolant and engine components have cooled down, drain engine coolant from radiator and remove threaded freeze plug. (For plug location refer to application chart on page 1.)
3. Apply a thin layer of gasket sealant (Nissan P/N 999MP-A7007) on both sides of the gasket. Slide it over the engine block heater threads.
4. Install engine block heater to engine block being careful not to damage the threads. Torque heater to 32 + 4 ft.lb (4.5 + 0.5 kg.m).

5. Connect power cord to engine block heater and route cord as follows:
A. From engine block heater route cord down, between drive shaft and engine block, toward front of the vehicle between exhaust pipe and engine oil pan (Figure 2). Attach cord to engine block ear on left side of compressor with a tie wrap. Continue routing cord along the left side of the compressor and attach it to the compressor high pressure hose (rubber portion) with a tie wrap. NX: Route cord under radiator core support and out to the front of the vehicle through right side opening of front lower grille. Secure cord to grille with tie wrap (Figure 3).
Sentra: Route cord up and toward the right, through the opening behind right head lamp, between the two legs securing the front grille to the radiator core support. Secure cord to vertical member of front grille with a tie wrap (Figure 4). CAUTION: Make sure that power cord is not routed close to or touching any of the vehicle’s moving parts or hot surfaces.

6. Refill cooling system; pressurize to radiator cap relief pressure and check for leaks. Operate engine to check further for leaks. Refer to manufacturer’s Service Manual “Engine Cooling System” section. NOTE: It is recommended that low phosphate anti-freeze be used and that a maximum anti-freeze/water mixture ratio of 50/50 be used. Refer to Nissan Owner’s Manual “Engine Cooling System” section.
7. Reinstall engine undercover.
8. Use cable end protector cap when heater is not plugged into power source.

PROCEDURE
1. Remove exhaust pipe heat shield and steering column lower joint assembly for access to indicated freeze plug. Remove section of exhaust pipe connected to turbocharger if necessary.
2. Remove front section of exhaust pipe for access to indicated freeze plug.
3. Remove alternator for access to indicated freeze plug.

Download Nissan Maxima 1990 Car Engine Block Heater PDF Installation Instructions