NHTSA opens preliminary probe into more than 870,000 GM vehicles

[Roadglide16]

I don't know what y'all think this is going to do. GM is already reacting to the problem and trying to fix it. Losing money and angering your customers is not a good way to do business. Hopefully they'll ditch their DIE hires soon and the poor decisions that lead to these failures will get resolved quickly.

Any idea what GM is doing to try and fix this issue? Thanks!

 

[Scarey]

That’s the $80,000 question.

 

[DontTaseMeBro]

Seems from info I am finding is the front main bearing and the #1 and #2 rod bearings tend to be the more common failure on the 6.2l engines. This is most likely due to the front main bearing and rod bearings #1 and #2 being the last in the oil flow path or being furthest from the oil pump.

So yes, oversize lifter bores could be a contributing problem because the cam and lifters are supplied oil first and the front lower portion of the engine could be oil starved, or what about the 0W20 engine oil being a contributing factor as well? Could also be due to oil consumption and running the engines low on oil as well?

Add to that, the 2 stage oil pump. Not a lot of room for error. And if the conditions are just right, pretty ripe scenario for a kaboom.

 

[swathdiver]

Any idea what GM is doing to try and fix this issue? Thanks!

None. I do know a GM mechanic and will ask him and get back to you.

 

[Doubeleive]

Any idea what GM is doing to try and fix this issue? Thanks!

they are going to do whatever cost's them the least amount of money.
in the meantime you are at the mercy of whatever warranty you may have or pay out of pocket, in which case it would be wise to save any receipts.

 

[PPK_]

Add to that, the 2 stage oil pump. Not a lot of room for error. And if the conditions are just right, pretty ripe scenario for a kaboom.

The pressure we see on the dash is after the oil filter… but all the lifters and bearings are after it. It sure does look like the crankshaft front is what get oiled last… the oil pressure there is less than what you see on the dash. I imagine a plugged filter does not help either. It looks to me like a worn cam bearings could easily take oil pressure down enough for trouble in the mains/rods. Not good…

it sure does look like going to a 5w30 makes some sense as you will reduce lost pressure.. due to higher viscosity.. assuming enough oil is left to cool things..

 

[DontTaseMeBro]

The pressure we see on the dash is after the oil filter… but all the lifters and bearings are after it. It sure does look like the crankshaft front is what get oiled last… the oil pressure there is less than what you see on the dash. I imagine a plugged filter does not help either. It looks to me like a worn cam bearings could easily take oil pressure down enough for trouble in the mains/rods. Not good…

it sure does look like going to a 5w30 makes some sense as you will reduce lost pressure.. due to higher viscosity.. assuming enough oil is left to cool things..

Yup. I made that conclusion after the last oil change. 5W-30 from here on out.