Lost the 6.2 (was: May have Lost the 6.2)

[Vladimir2306]

I'm desperately trying to find the logic in towing a heavy trailer at 94mph... oh well.

The logic is simple...if there are roads and traffic conditions that allow you to do this, then why not drive like this?) Fuel consumption is only high, you often have to stop at a gas station, but still, you reach your destination quickly.

 

[Vladimir2306]

Trailer push truck in Russia

For fast cargo transportation across vast Russia))

 

[Stbentoak]

Most trailer tires can't take 55 miles an hour, let alone 95. That would be a rolling bomb as far as I would be concerned.....

 

[blanchard7684]

Things are different over there.

I was thinking of I20 and I40 in west Texas actually. lol. The Bro Dozers are insane.

 

[Vladimir2306]

Most trailer tires can't take 55 miles an hour, let alone 95. That would be a rolling bomb as far as I would be concerned.....

What kind of tires do you have? In principle, cheap trailer tires have a speed index of 140 kmh, or almost 90 mph. And if you put sports, high-speed tires, then people with trailers and jet skis travel 200 kmh, which is 125 mph or more))

 

[vcode]

The logic is simple...if there are roads and traffic conditions that allow you to do this, then why not drive like this?) Fuel consumption is only high, you often have to stop at a gas station, but still, you reach your destination quickly.

Gotta ask, what kind of mpg's do you get at that speed, 6-7 mpg?

 

[tagexpcom]

What kind of tires do you have? In principle, cheap trailer tires have a speed index of 140 kmh, or almost 90 mph. And if you put sports, high-speed tires, then people with trailers and jet skis travel 200 kmh, which is 125 mph or more))

In the US, common trailer tires are not rated for 90mph+ is my understanding. This is from -https://tirecrunch.com/trailer-tires-speed-rating/

I do "L" with 75mph top speed so I can cruise at 70'ish on interstates - but it costs extra. The M/N (81/87mph) tires are even more expensive and I don't think people pay for it often. They don't even list 95mph - which is why (I think) people are questioning the 94mph comment. Of course Russia is not the US and no reason tires shouldn't be different ratings.

 

[Antonm]

I'm desperately trying to find the logic in towing a heavy trailer at 94mph... oh well.

Perhaps he was trying to "prove" that the 0W20 oil he loves so much can handle the abuse of such a situation (because you know GM had that use case in mind when they spec'd 0W20).

Of course no oil can magically fix manufacturing defects or remove machining swarf left in the engine, but there is a reason high HP / heavy use vehicles spec an oil that's a little thicker at operating temp.

During such continued high HP usage, I'd bet the oil was screaming hot (and thin as a result of the temperature). The addition of another oil cooler would help (the L87 has an oil cooler , but its pretty small) if one was so inclined to continue to tow at high speeds (again , not a new concept, every diesel pickup engine out there has a huge oil cooler for a reason).
...

 

[WalleyeMikeIII]

Hey Guys, appreciate the info sharing...but lets try to keep this thread to specific discussion about the experience I have w/ my vehicle's 6.2 replacement, so others who will inevitably get in the same boat can understand how it goes...I appreciate the discussion, but veering into trailer tire speed ratings is off the topic of this thread (perhaps better suited for "trailers and towing" section)

 

[WalleyeMikeIII]

Perhaps he was trying to "prove" that the 0W20 oil he loves so much can handle the abuse of such a situation (because you know GM had that use case in mind when they spec'd 0W20).

Of course no oil can magically fix manufacturing defects or remove machining swarf left in the engine, but there is a reason high HP / heavy use vehicles spec an oil that's a little thicker at operating temp.

During such continued high HP usage, I'd bet the oil was screaming hot (and thin as a result of the temperature). The addition of another oil cooler would help (the L87 has an oil cooler , but its pretty small) if one was so inclined to continue to tow at high speeds (again , not a new concept, every diesel pickup engine out there has a huge oil cooler for a reason).
...

@Antonm -- Please, already asked once (#23) to start your own debate thread on Oil Merits elsewhere...this thread is supposed to be for people to understand the experience of having a 6.2 fail and subsequent repair.

 

[WalleyeMikeIII]

Friday Update: Have "heard" the dealer expects the engine to arrive today or Monday, Dec 22. If it arrived Monday, that would be just 2 weeks since incident. Haven't discussed with them yet how long the repair takes.
I have been thinking if there are additional actions I should ask them to do since they pretty much have it all apart, that are basically free to do. Let me know if I miss anything
Examples:
- Ask them to clean the throttle body before re-installing the intake on the new engine
- Perform a flush of both heater cores (since they are replacing radiator and engine, may as well flush the remaining parts of the cooling system, right?)
- Install a new Air filter (why put a dirty air filer on a clean engine?)

 

[shekmark]

Walleye, do you know for sure that the replacement engine does not include a new throttle body?

 

[WalleyeMikeIII]

Walleye, do you know for sure that the replacement engine does not include a new throttle body?

Yes, intake and water pump are not included and get moved over.

Coils, spark plugs, and wires are included.

 

[WalleyeMikeIII]

Dealer called. All parts needed have arrived.
Said they hope to start the replacement today.

 

[Vladimir2306]

Walleye, do you know for sure that the replacement engine does not include a new throttle body?

And why torment the dealer? there is a review bulletin, everything is written there that is changing. in particular, the oil cooler and the oil line are additionally changed.

 

[Vladimir2306]

Dealer called. All parts needed have arrived.
Said they hope to start the replacement today.

The process of replacing the engine is 1 day of operation, as well as its start-up and calibration of all systems. so two days and everything should be ready. It took me 9 days, but it involved disassembling the old one, repairing it, then buying a new engine, disassembling it, and reassembling it.

 

[WalleyeMikeIII]

T

The process of replacing the engine is 1 day of operation, as well as its start-up and calibration of all systems. so two days and everything should be ready. It took me 9 days, but it involved disassembling the old one, repairing it, then buying a new engine, disassembling it, and reassembling it.

They promised me next week early, but they are not working on Chirstmas Eve or Christmas Day.

 

[WalleyeMikeIII]

Service advisor just called. Yukon is ready for pickup, I won’t be able to get until Monday due to the holidays…but they said it’s ready to go!

 

[Vladimir2306]

Service advisor just called. Yukon is ready for pickup, I won’t be able to get until Monday due to the holidays…but they said it’s ready to go!

I told you, there is 1 day of work)))

 

[2024 White Tahoe]

I told you, there is 1 day of work)))

The GM recall TSB regarding engine replacement allows 19.xx hours of labor to replace the engine and discharge and recharge the a/c unit (varies slightly with options).