The Disassembly of Isuzu Engine 4JJ1 Euro 4 N Seriesradiator

                                                        Radiator

This article is to introduce the disassembly of isuzu engine 4JJ1 Euro 4 N Seriesradiator

Legend
1. Coolant reserve tank hose4. Fan guide
2. Radiator upper hose5. Intercooler
3. Radiator6. Radiator lower hose Removal

1. Loosen the water drain plug(on the rear right side of the engine) and radiator drain plug, and completely drain the coolant.
2. After completely draining the coolant, securely tighten the drain plug.

3. Remove the intake hose, turbocharger side, intercooler side, and intake pipe bracket between the turbocharger and intercooler.

4. Disconnect the ECM harness connector.

5 Remove the boost sensor harness connector(1).

6. Remove the intake hose, throttle side, intercooler side, and intake duct bracket between the intercooler and throttle valve.

7.Remove the radiator upper hose at the radiator side.

8.Remove the radiator lower hose at the radiator side.
9.Remove the fan guide bracket.

Legend
1. Fan guide bracket right upper
2. Fan guide bracket left upper
3. Fan guide bracket lower
4. Bolt
10. Remove the ATF coolant pipe from the radiator.
(Smoother vehicles only)
11. Remove the radiator.
a. Remove the intercooler from the radiator.


b. Remove it carefully from between the left andright frames, ensuring that the radiator and fan blade do not touch and get damaged.

Inspection Radiator cap
1. Use the radiator cap tester to inspect the open valve pressure. Replace the radiator cap if the open valve pressure is not at the standard value.
Open valve pressure
93-123kPa(0.95-1.25kg/cm2/13.5-17.8 psi)

2. Inspect the condition of the negative pressure valve in the center of the cap valve seat side. If the valve seat is not operating smoothly because of rust or foreign matter, clean or replace the radiator cap

Radiator core
1. Remove dirt or other foreign matter.
Also, if the radiator fins are deformed, this can lead to a drop in heat dissipation and cause overheating. Repair the fins. When repairing, be careful not to damage the base of the fins.
Washing the radiator
1. Wash the inside of the radiator and coolant path with water. Wash away all scales and rust.
Washing the radiator core CAUTION: Do not perform high-pressure washing onto the radiator, intercooler and surrounding parts when they are still installed on the vehicle.
1. Seal the hose connecting section with a cap or fabric tape.
2. Sufficiently wet the front and back surfaces of the radiator.
· Adhering matter which easily comes off with a splash of tap water should be washed off sufficiently in advance.
NOTE: Do not use a high-pressure washer or brush.

3. Prepare a mild detergent.
· Use a type which contains approx.8% of surface acting agent.
NOTE: Do not use anything other than a mild detergent. Use of any product other than a mild detergent may cause corrosion.
4. Spray the mild detergent onto both sides of the fins, and leave them as is for 10 minutes.
5. Rinse off the mild detergent using a high-pressure washer.
· Start washing from the engine side of the radiator.
NOTE:
· Apply the high-pressure water in a direction perpendicular to the fins.
· Do not bring the high-pressure water too close to the fins.
· Be careful not to deform the fins..