GM LM7 engine
Content
The GM LM5.3 or Vortec 8 7-liter V5300 engine was produced by the concern from 1999 to 2007 and was installed on SUVs and pickup trucks based on the GMT800 platform, such as Tahoe, Yukon and Silverado. There is a Flexible-fuel modification of this power unit under its own index L59.
The Vortec III line also includes an internal combustion engine: LR4.
Specifications of the GM LM7 5.3 liter engine
| Exact volume | 5327 cm³ |
| Supply system | distribution injection |
| Internal combustion engine power | 270 - 300 HP |
| Torque | 425 - 455 Nm |
| Cylinder block | cast iron V8 |
| Block head | aluminum 16v |
| Bore | 96 mm |
| Piston stroke | 92 mm |
| Compression ratio | 9.5 |
| Features of the internal combustion engine | OHV |
| Hydraulic compensators | Yes |
| Timing drive | chain |
| Phase regulator | Yes |
| Turbocharging | no |
| What kind of oil to pour | 5.7 liters 5W-30 |
| fuel type | AI-92 |
| Environmental class | EURO 2 |
| Approximate resource | 500 000 km |
Fuel consumption ICE Chevrolet LM7
Using the example of a 2000 Chevrolet Tahoe with an automatic transmission:
| City | 17.9 liters |
| Track | 10.1 liters |
| Mixed | 13.0 liters |
Which cars were equipped with the LM7 5.3 l engine
| Climbing 2 (GMT820) | 2001 – 2006 |
| Avalanche 1 (GMT805) | 2001 – 2006 |
| Express 2 (GMT610) | 2003 – 2007 |
| Silverado 1 (GMT800) | 1998 – 2007 |
| Suburban 9 (GMT830) | 1999 – 2006 |
| Tahoe 2 (GMT820) | 1999 – 2006 |
| Savannah 2 (GMT610) | 2003 – 2007 |
| Saw 2 (GMT800) | 1998 – 2007 |
| Yukon 2 (GMT820) | 1999 – 2006 |
| Yukon XL 2 (GMT830) | 1999 – 2006 |
Disadvantages, breakdowns and problems of the internal combustion engine LM7
Many engine problems from overheating, monitor the condition of the radiator and pump
When overheated, plastic pipes and tees crack, and then leaks appear
Wrong choice of oil turns into quick wear of the camshaft liners
The weak points of this internal combustion engine also include a gasoline pump, an adsorber and ignition coils.
Gas equipment needs to be adjusted correctly or the valve seats will collapse
