Recent content by blanchard7684
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2024 5.3 Ticking
Hmmm never thought about something cooking off...- blanchard7684
- Post #19
- Forum: Engine & Drivetrain
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2024 5.3 Ticking
My stethoscope says it is the catalytic converters... same time rhythm- blanchard7684
- Post #17
- Forum: Engine & Drivetrain
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BREAKING: GM is officially recalling the L87
Didn’t see that one had oil change information listed.- blanchard7684
- Post #363
- Forum: Engine & Drivetrain
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BREAKING: GM is officially recalling the L87
I have yet to see an instance of a failure in this pseudo venn diagram: greater than 5,000 miles, less than 90,000 2021-2024 range Oil changed before 5000 miles, even with 0w20 Higher viscosity oil used, with any oil change interval, since first oil change DFM disabled all or most of the time...- blanchard7684
- Post #360
- Forum: Engine & Drivetrain
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BREAKING: GM is officially recalling the L87
Dang good find. The two issues could have combined or been separate. Debris explains the early failures. The crankshaft defect explains the failures at higher mileage. If both defects were present it explains the ones that failed leaving the dealer lot or before the first oil change. 5.3 is...- blanchard7684
- Post #287
- Forum: Engine & Drivetrain
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BREAKING: GM is officially recalling the L87
Hell their only recourse is either 1) put correctly manufactured parts in all 6.2 in affected range ( good bye stock price). This one is best option for customer. I mean this is what we paid $80 K or more for right? The wait would be terrible. This is where the 0w40 is a potent stop gap. 2)...- blanchard7684
- Post #240
- Forum: Engine & Drivetrain
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BREAKING: GM is officially recalling the L87
I’m really not liking the p0016 being a go / no-go on this.- blanchard7684
- Post #238
- Forum: Engine & Drivetrain
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2007 Tahoe/Rocker Racket - Not AFM! Need Suggestions...
Yes the needle bearings in roller tip fail leading to symptoms similar to collapse… and it will wipe out a cam lobe to boot. I haven’t seen a hack yet on getting lifters out without removing head.- blanchard7684
- Post #2
- Forum: Engine & Drivetrain
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BREAKING: GM is officially recalling the L87
If it were me I'd be doing a 0w40 swap this weekend. It is the easiest thing end user can do to improve their odds against a failure.- blanchard7684
- Post #210
- Forum: Engine & Drivetrain
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BREAKING: GM is officially recalling the L87
Agreed. There is probably a whole lot more to the manufacturing defect story than is currently known outside of GM technical staff. My guess is some sort of tolerance stacking. The right combination of parts that are at their spec limits can cause a failure in the right conditions: diluted oil...- blanchard7684
- Post #199
- Forum: Engine & Drivetrain
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BREAKING: GM is officially recalling the L87
Starting to agree...- blanchard7684
- Post #193
- Forum: Engine & Drivetrain
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BREAKING: GM is officially recalling the L87
Those are good discussion points. When an engine, or specifically a rotor system with hydrodynamic bearings, is designed with 0w20 as the primary oil then it can work. If you set your viscosity to a 0w-20, then design the bearing width, diameter, and clearance to support a good eccentricity...- blanchard7684
- Post #189
- Forum: Engine & Drivetrain
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BREAKING: GM is officially recalling the L87
So the 2025’s are still spec’d with 0w20 because “crankshaft and connecting rod manufacturing improvements “. That means it took 4 years to figure out this “manufacturing defect”?- blanchard7684
- Post #168
- Forum: Engine & Drivetrain
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Engine shuts off while driving
Yikes . Probably the first 5.3 going down hard we’ve seen in a good while. and the code p0016 is implicated in the 6.2 recall recently posted. Thanks for the update.- blanchard7684
- Post #75
- Forum: Engine & Drivetrain
