Engine tearing reveals internal faults for GM L87 6.2L V8 Remember

Engine tears reveal internal failures associated with the GM L87 6.2L V8 remembrance, initially the Autoblog appeared.

The NHTSA probe is aimed at more than 870,000 Gm trucks and SUVs

General Motors started in 2025. Faced with the main problem: The National Highway Traffic Safety Administration (NHTSA) has opened an official investigation into the company widely used by the company’s 6.2 -liter L87 V8 engine. The probe affects 877,710 full -size trucks and SUVs, and after a few reports of engine failures were filed with the agency. Since then, the study has led to a large -scale cancellation and an order to stop.

In some cases, these engine failures occurred on the highway or just a few miles away to the vehicle. Needless to say, they are a serious security risk.

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Which vehicles have been affected by the L87 engine withdrawal?

The list of affected vehicles includes the Chevrolet Silverad 1500, Tahoe and the suburban Chevrolet Silverad 1500; Cadillac Escalade and Escalade ESV; and GMC Yukon, Yukon XL and Sierra 1500, Model Year from 2021 to 2024, all powered by a small block V8 engine. The American car manufacturer did not define the exact problem with the problem power plant, only to say that the components of the connecting rod and / or crankshaft have unspecified production defects.

Inside the failure: tearing reveals a serious engine damage

But what happens inside the L87 V8 engine when it fails? Internet mechanic I am doing cars I got a hand on one engine tore out, giving a more intimate gaze to the inside of one of the GM V8 mill, which faced a catastrophic failure. It is said that the engine in question was canceled (GMC Yukon Denali from 2022), although details of how it was not disclosed to it.

Flooding begins optimistic: the engine can be handed up by hand, stating that there are no fully confiscated components. However, Pushrods appears the first sign of trouble that indicates abnormal wear. The lifts, though none of them collapsed completely, indicate the signs of the effects of garbage, the condition of which is particularly poor.

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Connecting rod, crankshaft problems confirmed by lesion

Removing the oil skillet reveals more – much more. The inner oil has become black coal in color, indicating strong overheating and oil degradation. All eight connecting rods are fully shot, showing serious damage. The distribution shaft section also lacks a slice, and the points at the front of the block show the crankshaft struck the block.

The delay reveals a significant and unusual damage to a relatively young and modern engine, although it corresponds to the GM claim that the problem is with connecting bars and cranks. It is also likely that this engine failed gradually, unlike other reported instant motor failure. According to the rapporteur, the owner probably ignored the early signs of engine problems that caused more catastrophic damage.

GM questions remember the correction but the owners push back

As part of the cancellation, GM has already provided a solution to the problem. The affected engines that have not yet failed, their oil will be replaced with a thicker 0W-40 oil (replacing the former 0W-20), thus increasing protection at temperature. They will also receive a new oil filter and an oil filler cover reflecting the change. Shooting engines will be replaced.

However, not everyone is satisfied with the help of the GM Group with a solution to this widespread problem. The court’s lawsuit states that replacement of engine oil would reduce fuel economy with higher viscosity. The court’s lawsuit states that “two bad options are provided to the owners: do nothing and risk a catastrophic engine failure or pay hundreds of dollars more for petrol.”

Engine tears reveal the inner GM L87 6.2L V8 failures

Initially, Autoblog reported this story in 2025. May 30, where she first appeared.