BREAKING: GM is officially recalling the L87

[Kaminski]

Do you think having 0W-40 in the engine during Pico test could mute some of the findings and potentially keep you from getting a new engine when you actually need one?

I don’t know for certain, but I imagine it could quiet it down. I’ll be switching to 0-20 right before my “test” although I shudder to pour that water in my engine and actually drive it.

 

[GMCChevy]

Cause my owners said they own the loaner cars NOT GM and they arent giving out cars to people that didnt buy from us. And if they are only paying 18.6 hours under warranty to do an engine replace then your gonna have dealerships and technicians not happy. You better take your car back to the dealership that you bought it from during this recall. I have talked to other service writers at other dealerships and a lot of them feel the same way about working on other brands or cars that werent bought from them.

It doesn't work that way. At the very least when it comes to brands the dealer represents they can't pick and choose what they work on for recalls.
If GM is putting people in a loaner vehicle thats on them and they should be reimbursing the dealer in some way for that. Chances are they'd be putting people in rentals because dealer owned loaners are usually a courtesy.

 

[viven44]

I don’t know for certain, but I imagine it could quiet it down. I’ll be switching to 0-20 right before my “test” although I shudder to pour that water in my engine and actually drive it.

Looks like the procedure calls for a minimum temp. I hope this is automated and not subject to the attention of the technician. Also what is the viscosity difference between 0W-20 and 0W-40 at 70C ?

IMPORTANT: Engine coolant temp much reach 70 degrees C before SPS commands engine speed to 2,000 RPM.

 

[Scagsdale]

We built parts in different locations and never changed the part number. The print is the print and it didn't matter where the part came from. We closed a plant and shifted production to another plant. Why would we change part numbers? We also purchased parts from different manufacturers. We didn't change the part number by vendor. That would be a nightmare.

Yep, the drawing controls the part number, not the manufacturing location. That’s how it was in Aerospace production when I was working for Hughes Aircraft Company. Maybe it’s different in Russia, though.

 

[Scagsdale]

Cause my owners said they own the loaner cars NOT GM and they arent giving out cars to people that didnt buy from us. And if they are only paying 18.6 hours under warranty to do an engine replace then your gonna have dealerships and technicians not happy. You better take your car back to the dealership that you bought it from during this recall. I have talked to other service writers at other dealerships and a lot of them feel the same way about working on other brands or cars that werent bought from them.

So, if you bought your car in 2021 in New York and then move to Florida, you have to drive a potentially dangerous vehicle all the way up to New York to get fixed? Hahahaha. The lawyers are gonna love that. GM should dump any dealership that pulls that garbage.

 

[Bkihum]

It doesn't work that way. At the very least when it comes to brands the dealer represents they can't pick and choose what they work on for recalls.
If GM is putting people in a loaner vehicle thats on them and they should be reimbursing the dealer in some way for that. Chances are they'd be putting people in rentals because dealer owned loaners are usually a courtesy.

Must be GM product and no older than 2 years.

 

[BADRIDES]

And GM would be ok with this? People buy vehicles outside of their area all the time. Or buy a vehicle then move. This is a national recall and you should do the recall no matter where the vehicle was purchased. I do kind of understand not doing other "brands" if you are a Chevy dealer. I'm not taking my Yukon to anything but a GMC dealer.

They are gonna have to be ok with it because my owners own the loaner vehicles not GM plus all my loaner cars are older than 3 years of the 21's so we couldnt loan them out cause we wont get reimbursed. They can go to an Enterprise dealership about 25 miles from my dealership and get a car if GM will pay for it.

 

[jfoj]

Looks like the procedure calls for a minimum temp. I hope this is automated and not subject to the attention of the technician. Also what is the viscosity difference between 0W-20 and 0W-40 at 70C ?

IMPORTANT: Engine coolant temp much reach 70 degrees C before SPS commands engine speed to 2,000 RPM.

Coolant Temp and Oil Temp are VERY different. I would have assumed that GM would have wanted the Oil temp controlled vs the Engine Coolant Temp. The large volume of oil in these engines take at least 20 minutes of DRIVING for the oil to reach the coolant temperature under most circumstances! Maybe if you are in Arizona with 110F ambient temps, you may only need to drive the vehicle for 15 minutes??

But who am I to question GM's test methods. Maybe they want fewer "Failed" inspections, it saves them a lot of money!

 

[mummer43]

They are gonna have to be ok with it because my owners own the loaner vehicles not GM plus all my loaner cars are older than 3 years of the 21's so we couldnt loan them out cause we wont get reimbursed. They can go to an Enterprise dealership about 25 miles from my dealership and get a car if GM will pay for it.

Sounds like a dealer no one should do business with.

 

[Marky Dissod]

Coolant Temp and Oil Temp are VERY different. I'd've assumed that GM would have wanted the Oil temp controlled vs the Engine Coolant Temp.
The large volume of oil in these engines take at least 20 minutes of DRIVING for the oil to reach the coolant temperature under most circumstances!
Maybe if you are in Arizona with 110F ambient temps, you may only need to drive the vehicle for 15 minutes?

Emphasis on coolant temp vs oil temp is due to environmental / chemical combustion concerns.
Even motor oil that is significantly colder than the coolant temp has very little to no effect on what the actual stoichiometric AFR is.
But if the motor oil is 221F & the coolant is at 31F, 14.7:1 is NOT stoichiometric inside that combustion chamber.