Quote:
Originally Posted by tortilla-flats
I'm seeing a rumor about a potential recall on the L87 6.2L used in the GM Truck/SUV class, due to bearing failure. Does *not* include the LT1.
What is different in the long block between the L87 & LT1, such that this wouldn't potentially impact the LT1?
Also, anyone heard of bearing failures in the LT1?
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Well, for one thing GM isn't going to recall anything extra that it doesn't have to, haha. So if it's mostly the L87s having issues they aren't looking to make it worse for themselves.
I saw the article also but thought it seemed a bit like a nothingburger. NHTSA says 39 engines have been reported to have issues, out of 877,710 vehicles....That is 0.00004 percent? Seems crazy to me that they would be able to make GM do anything about that. Those are not bad odds especially considering how many people do not maintain their vehicles properly.
To answer your question though here is a good article on the differences in the LT motors.
https://inthegaragemedia.com/the-ult...-engine-guide/
"The L86 and L87 are also very similar to the LT1 engine in the Camaro and C7 Corvette—they even share the same camshaft part number—but with a specific intake manifold and other variances to enhance lower-rpm torque production. Another win for the L86/L87 is a super-tough forged steel crankshaft."
Have not personally seen any bearing failures with LT1, the weak point is usually the pistons.