8981733420 piston cooling oil nozzle for ISUZU engine spare part

Application Scenarios

Fit for Isuzu 4HK1,6HK1 series engines, compatible with Hitachi ZX200-3, ZX330 excavators and Isuzu 700P, FVR, FTR medium-heavy trucks. Suitable for mining, earthmoving and long-distance freight conditions. Used to replace failed nozzles during engine overhaul or piston seizure repair.

FAQ 

Q: Can I replace only one blocked nozzle?
A: Not recommended. Other nozzles are also exposed to contaminated oil with hidden clog risk, full set replacement is preferred.

Q: What damage will happen if check valve stuck open?
A: Continuous heavy oil spray reduces main oil pressure, insufficient lubrication to crankshaft and bearings, easy to burn bearings.

Q: How to verify nozzle alignment if misalignment is invisible?
A: Follow OEM locating marks during assembly. Spray test on low-pressure bench to confirm oil hits piston cavity.

Q: Will overdue oil filter accelerate nozzle failure?
A: Yes. Metal debris in oil easily sticks check valve and clogs jet hole. Oil and filter must be replaced on schedule.