Isuzu Engine 4JJ1 Euro 4 N Series Thermostat Assembly

   This article introduces how to assemble isuzu engine 4JJ1 Euro 4 N Series thermostat

 

ISUZU Truck Workshop Service Repair Manual PDF

Legend
1.Water outlet pipe
2.Thermostat
3.Gasket

Removal
1. Drain the engine coolant.
Prepare a container for discharge and use it for filling when installing the thermostat. The amount of coolant to be discharged should be enough to avoid coolant from spilling from the housing on the cylinder head side.
2. Remove the engine cover.
3. Remove the turbocharger coolant hose and pipe from the radiator upper hose.
4. Remove the radiator upper hose at the radiator side.
5. Remove the water outlet pipe.
6. Remove the thermostat.
7. Remove the gasket from the thermostat.
Inspection
· Place the thermostat in water, and raise the water temperature while thoroughly stirring it.

·Measure the temperatures when the valve starts opening and when it is fully opened.

ISUZU Truck Workshop Service Repair Manual PDF

Installation
1.Install the gasket to the thermostat and face the jiggle valve to the engine front side to install it.
·Securely insert so that the thermostat gasket does not ride up outside of the cylinder head side housing.

Assembly of Isuzu Engine Thermostat

This article introduces how to assemble isuzu engine thermostat

  

Legend
1. Reserve tank
2. MAX line(upper limit)3. MIN line(lower limit)
5. Install the engine cover.


Legend
1. Jiggle valve
2. Thermostat
2. Install the water outlet pipe.
Tightening torque:25 N-m(2.5kg-m/18 lb-ft)
· Install the turbocharger coolant hose and pipe to the water outiet pipe.
3. Install the radiator upper hose.
· Tighten the radiator hose clip.
Tightening torque:5 N-m(0.5kg-m/43 lbin)

4. Fill the coolant stored when discharged, and check the coolant level.

ISUZU US-IDSS Diagnostic Service Truck Diagnostic System [06.2021]