GM LR4 engine
Content
The 4.8-liter V8 GM LR4 engine was produced by the American concern from 1998 to 2007 and was installed on the Chevrolet Tahoe SUV in the back of the GMT 800 and the Yukon similar to it. This engine was also installed on Silverado and Sierra pickups, as well as Express and Savana minibuses.
The Vortec III line also includes an internal combustion engine: LM7.
Technical characteristics of the GM LR4 4.8 liter engine
| Exact volume | 4806 cm³ |
| Supply system | distribution injection |
| Internal combustion engine power | 255 - 285 HP |
| Torque | 385 - 400 Nm |
| Cylinder block | cast iron V8 |
| Block head | aluminum 16v |
| Bore | 96 mm |
| Piston stroke | 83 mm |
| Compression ratio | 9.4 |
| Features of the internal combustion engine | OHV |
| Hydraulic compensators | Yes |
| Timing drive | chain |
| Phase regulator | no |
| Turbocharging | no |
| What kind of oil to pour | 5.7 liters 5W-30 |
| fuel type | AI-92 |
| Environmental class | EURO 2 |
| Approximate resource | 450 000 km |
Fuel consumption Chevrolet LR4
Using the example of a 2003 Chevrolet Tahoe with an automatic transmission:
| City | 17.7 liters |
| Track | 9.9 liters |
| Mixed | 12.8 liters |
Which cars were equipped with the LR4 4.8 l engine
| Express 2 (GMT610) | 2003 – 2006 |
| Silverado 1 (GMT800) | 1998 – 2007 |
| Tahoe 2 (GMT820) | 1999 – 2006 |
| Savannah 2 (GMT610) | 2003 – 2006 |
| Saw 2 (GMT800) | 1998 – 2007 |
| Yukon 2 (GMT820) | 1999 – 2006 |
Disadvantages, breakdowns and problems of the internal combustion engine LR4
The key to trouble-free operation of the internal combustion engine is the cleanliness of the radiators and the condition of the water pump
Plastic tees burst from overheating, leaks of lubricant and antifreeze appear
And the use of cheap oils leads to rapid wear of the camshaft liners.
We do not recommend installing gas equipment, valve seats will simply fall out
The weak points of the unit also include ignition coils, a gasoline pump and an adsorber
