4HK1-TC engines for sale

Prices as listed on our store on 15 October 2026.

What is the 4HK1-TC engine?

The 4HK1-TC is a 5.2 litre (5,193 cc) four-cylinder, 16-valve turbo diesel with a single overhead camshaft and high-pressure common-rail injection from a Denso supply pump, with a suction control valve that regulates rail pressure.

Which vehicles use the 4HK1-TC?

Our listing names the Isuzu 4HK1-TC 5.2.

Model names and years overlap. So we check the fit from your VIN, series and current engine before we quote. See will this engine fit my vehicle.

What problems are reported with the 4HK1-TC?

These problems are reported in the sources listed below. Not every engine gets them. A symptom is not a diagnosis.

• Fuel pressure control. An Isuzu bulletin describes the supply pump's suction control valve working intermittently, causing lack of power, an engine that won't rev, idle vibration and hard starting. Blocked or non-genuine fuel filters, air leaks and dirty fuel are checked first. (US-market bulletin.)
• EGR cooler leaks. Another Isuzu bulletin covers EGR coolers that leak coolant into the exhaust and cylinders, or exhaust gas into the cooling system. (US-market bulletin.)
• N Series recalls. Two Australian recalls on 2006 to 2007 N Series trucks covered an oil pipe eye bolt and a supply pump pipe. The register does not say which engine, so check by VIN.

What are the signs a 4HK1-TC may need replacing?

Lack of power, poor revving, rough idle and hard starting, often with fuel rail pressure codes such as P0087 or P0088, point to the fuel pressure control side. Unexplained coolant loss or air in the cooling system can point to a leaking EGR cooler, which is easy to mistake for a head gasket.

Should you repair, rebuild or replace a 4HK1-TC?

Fuel pressure and EGR cooler faults are repairs if caught early. An EGR cooler leak that let coolant into the cylinders can damage the engine, and that is where a rebuild or replacement comes in.

Our options, in short:

• Repair it, if the fault is in a part bolted to the engine, not the engine itself.
• Rebuild your own 4HK1-TC, if it is serviceable. We strip it, inspect it and give you a fixed quote. If not, there is a teardown fee for the labour.
• Replace it with a new long motor from our range below, from $7,250.

What 4HK1-TC engines does Reco list?

Swipe across the table to see all columns.

Freight is quoted per job. We fit engines at our Sydney and Melbourne workshops. Fitting jobs need a 50% deposit. Engine-only orders are paid in full before dispatch.

What should you ask before ordering a 4HK1-TC?

1. Which truck, model and year, and which 4HK1 rating?
2. Has the EGR cooler been pressure tested?
3. Is the fuel system healthy? The supply pump and injectors come across from your old engine.
4. Do I want it fitted at a Sydney or Melbourne workshop, or sent to my workshop?

Ask us about your 4HK1-TC

Use the enquiry form. Give us the make, model, year, series, rego and VIN, and say if you need it fitted. Or call 02 9737 0105. Quotes are valid for 30 days.