mulalleybs

Don't have all the details yet. He did say it would require an investigation, but I dropped the car off two weeks ago. The engine was pulled and pan dropped last week.

He said the cam was loose or something and it was tearing up the motor.

johnglenntwo

I don't recall ever hearing anything bad about the LS9! That engine was really Hand Built, and bullet proof. Too bad the car wasn't a big seller like the new mass produced$$$ SC. They've planned on it blowing some! It's mathematically accurately predictable!

5thGear

Ask if they are changing the oil lines and drysump as well. It's a small investment to make sure no metal shavings gets transferred to the new motor.

mulalleybs

Good call! I appreciate it. I asked about everything except that.

0Terry@BMS

Sometimes I wonder if the dry sump approach on a "track car" that is rarely used on the track in the real world introduces more problems than it solves.

tbasco 6

I don't know how much good it does, but on all my vehicles I use a large round magnet (designed for the bottom of oil filters). If it does any good at all it's worth the $10 cost.

5thGear

This is not enough to clean oil tank (dry sump) and oil lines after a massive engine failure. I am sure the dealer would flush these components but that's not their specialty so why risk it. It's better to replace old plumbing with the motor. GM didn't have problem with this request when they replaced my Z06 motor.

tbasco 6

I was not referring to after a failure. I do it from day one in hopes of capturing metal shavings before they do much circulation.

mulalleybs

Just bought one of your filters in celebration of getting the car back sometime this year

spoke with the dealer today, they were already planning on replacing the dry sump system and lines. Thanks again for the heads up.

0Terry@BMS

Haha nice!

mulalleybs

Drove the car for 3 days and it was acting funny.. turns out they're replacing the motor again. This one lasted 180 miles. The rep told me the thrust bearing failed. What gives?

This is frustrating. Bought the car in Jan with 5k miles, it's just under 10k now and has had 2 motor replacement, supercharger issues, water pump issues, a loose steering rack, etc.

Car has been in the shop 6 times.

xkilo16x

This makes me worry as my car is also getting an engine replacement next week. You should definitely pursue the lemon law route.

davepl

Wow, this is unfortunate. Is it an M7? If the thrust bearing has failed multiple times I'd start to suspect something not set up correctly in the clutch or torque tube, perhaps putting too much load on the thrust bearing.

Total random guess, but it's pretty weird for a production engine thrust bearing to go!

mulalleybs

it's an a8 actually. It seems there have been some lt1 failures due to it also.

Hopefully third time's the charm.

Higgs Boson

thrust fails with misalignment of torque tube. also happened with early C7s getting torque tube replacements.

z51vett

Have any of you looked at thrust bearing in old design small block it was at rear of crank both halves of bearing had thrust washer made into it. New design move to center main bearing only half thrust bearing. When tolerances are to tight crank throw can hit edge of thrust bearing wiping it off allowing movement of bearing surface hello blown engine bad design. Oh it's number six connecting rod thru the block.
z51vett
Doug

mjdart

I noticed that when I built my engine, I asked why, but they didn't realize the significance, seems like a simple way to beef up the lower end.