The Mazda KL-G4 2.5-liter V6 gasoline engine was produced by the company from 1997 to 2002 and was installed only on the 626 model in the back of the GF in the modification for the US and Canadian markets. This motor was distinguished by a complex exhaust system with three catalysts, four lambdas.
K-engine family: K8-DE, K8-ZE, KF-DE, KF-ZE, KJ-ZEM, KL-DE, KL-G4, KL-ZE.
Specifications
| Production years | 1997-2002 |
| Displacement, cc | 2497 |
| Fuel system | distributed injection |
| Power output, hp | 170 |
| Torque output, Nm | 221 |
| Cylinder block | aluminum V6 |
| Block head | aluminum 24v |
| Cylinder bore, mm | 84.5 |
| Piston stroke, mm | 74.2 |
| Compression ratio | 9.5 |
| Features | DOHC, VRIS |
| Hydraulic lifters | no |
| Timing drive | belt |
| Phase regulator | no |
| Turbocharging | no |
| Recommended engine oil | 5W-30 |
| Engine oil capacity, liter | 4.0 |
| Fuel type | petrol |
| Euro standards | EURO 3 |
| Fuel consumption, L/100 km (for Mazda 626 2000) — city — highway — combined |
12.4 7.8 9.2 |
| Engine lifespan, km | ~500 000 |
| Weight, kg | 175 (with attachments) |
The engine was installed on:
- Mazda 626 GF in 1997 – 2002.
Disadvantages of the Mazda KL-G4 engine
- This motor is quite reliable, but the aluminum block and cylinder head are very afraid of overheating;
- Do not delay with the replacement of candles or you will have to change 3 expensive coils;
- After 100 thousand km, you may encounter grease leaks from under the valve covers;
- The belt runs 80,000 km, replacement is difficult and expensive, but if the belt breaks, the valve does not bend;
- Since there are no hydraulic lifters here, the valves need to be adjusted every 100,000 km.
Frequently asked questions about the Mazda KL-G4
How much power does the Mazda KL-G4 make?
The Mazda KL-G4 develops 170 hp and 221 Nm of torque.
How much oil does the Mazda KL-G4 take and which one?
Engine oil capacity: 4.0 liters. Recommended oil: 5W-30.
Does the Mazda KL-G4 have a timing belt or chain?
The Mazda KL-G4 uses a timing belt.
Is the Mazda KL-G4 turbocharged?
No, the Mazda KL-G4 is naturally aspirated.
Does the Mazda KL-G4 need valve clearance adjustment?
Yes, there are no hydraulic lifters, so the valve clearances have to be checked and adjusted periodically.
How long does the Mazda KL-G4 last?
The typical lifespan of the Mazda KL-G4 is ~500 000 km with proper maintenance.
What is the fuel consumption of the Mazda KL-G4?
Mazda 626 2000: city 12.4, highway 7.8, combined 9.2 L/100 km.
What cars was the Mazda KL-G4 installed on?
Mazda 626 GF in 1997 - 2002.
What are the common problems of the Mazda KL-G4?
This motor is quite reliable, but the aluminum block and cylinder head are very afraid of overheating. Do not delay with the replacement of candles or you will have to change 3 expensive coils. All known problems.
