Cooling System - Heavy Duty Radiator Installation

87nissan05

Models 1988 Truck

Section Engine Mechanical

Classification EM87-008

Bulletin No. TS87-185

Date December 28, 1987
HEAVY DUTY RADIATOR INSTALLATION


APPLIED MODEL: 1988 D-21 2WD Truck with VG30 engine, automatic and manual transmission.

1988 D-21 4WD Truck with Z24i engine, manual transmission only.

APPLIED DATE: 1988 Model Year

SERVICE INFORMATION

An optional, heavy duty radiator is available for installation in the applied model D21 Trucks. The heavy duty radiator may be identified by its thicker core (32 mm thick as compared to the 16 mm thick core of the standard radiator). The installation of the heavy duty radiator will allow the towing capacity of the vehicle to be increased from 2,000 pounds to 3,500 pounds when combined with a heavy duty hitch. (The hitch capacity must also be rated at 3,500 pounds. See the 1988 Nissan Towing Guide for information.)

PARTS INFORMATION


PART NAME PART NUMBER


Heavy Duty Radiator 21400-09GOO (MT)
or 21450-09GOO (AT)

Radiator Fixing Screw 01436-00591


NOTE: This radiator may be installed only at the expense of the customer. This Bulletin is not to be interpreted as a factory sponsored upgrade.
SERVICE PROCEDURE

1. Allow the engine and radiator to cool down.

2. Remove the front under cover (splash guard).

3. Open the radiator cap and the radiator drain valve. Drain all coolant from the radiator.

4. (On A/T models only) Disconnect the two A/T cooler hoses at the bottom of the radiator. Plug the hoses to avoid losing A/T fluid.

5. Remove the overflow tube from the radiator and shroud.

6. Disconnect the upper radiator hose from the radiator.

7. Remove the four screws that hold the radiator shroud.

8. Disconnect the lower radiator hose from the radiator.

9. Remove the two upper radiator mount screws. Remove the radiator.

10. Install the new radiator with two new upper mount screws.

11. Connect the lower radiator hose.

12. (A/T models) Connect the two A/T cooler hoses.

13. Install the radiator shroud.

14. Connect the upper radiator hose.

15. Install the overflow tube.

16. Refill the system with anti-freeze coolant solution at an anti-freeze to water ratio of 50/50.

17. Run the engine until it reaches normal operating temperature.

18. Stop the engine and check for coolant or A/T fluid leaks.

19. Install the front under cover (splash guard).



20. Allow the engine and cooling system to cool completely to room temperature. Open the air relief valve as shown in the following illustration (VG30 only). Fill the radiator to the top and the reservoir tank to the "MAX" level. Tighten the air relief valve.
21. Run the engine until it reaches operating temperature.

22. Check once more for fluid leakage at hoses and drain valve.