6HK1-T engines for sale

Prices as listed on our store on 15 October 2026.

What is the 6HK1-T engine?

The 6HK1 is a 7.8 litre (7,790 cc) six-cylinder, 24-valve diesel with a single overhead camshaft, a cast iron block and head, high-pressure common-rail injection from a Denso supply pump and a turbo with an intercooler.

Which vehicles use the 6HK1-T?

Our listing says it suits various model trucks with a 6HK1 spec engine, and we can spec it to suit your model.

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 6HK1-T?

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 covers 6HK1 trucks where a sticking suction control valve causes lack of power, poor revving, idle vibration and hard starting. (US-market bulletin.)
• EGR cooler leaks. Another Isuzu bulletin covers EGR cooler leaks on 6HK1 trucks. (US-market bulletin.)
• Fuel pressure limiter. An older Isuzu bulletin noted some early 6HK1-T engines could leak diesel from the fuel pressure limiter. (Read from a bulletin summary.)
• No Australian engine recall found. We found no Australian recall for the 6HK1 itself.

What are the signs a 6HK1-T may need replacing?

Fuel rail pressure codes, lack of power and hard starting point to the fuel pressure side. Coolant loss with no obvious leak, or air in the cooling system, can point to the EGR cooler. Diesel weeping around the fuel rail needs attention straight away.

Should you repair, rebuild or replace a 6HK1-T?

Fuel system and EGR cooler faults are repairs if caught early. Internal damage confirmed by tests, for example after coolant got into the cylinders, means a rebuild or replacement.

Our options, in short:

• Repair it, if the fault is in a part bolted to the engine, not the engine itself.
• Rebuild your own 6HK1-T, 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 $8,500.

What 6HK1-T 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 6HK1-T?

1. Which F Series truck, model and year, and which 6HK1 rating?
2. What has to be set up on the engine to suit my truck?
3. Has the EGR cooler been pressure tested?
4. Fitted at a Sydney or Melbourne workshop, or supplied to my workshop?

Ask us about your 6HK1-T

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.