His original post said that he's just getting a little blue puff of smoke. If he had no compression from one cylinder, it would sound horrible, and barely run, not to mention a crap ton of codes.

 

If that takes 3 or 4 weeks then you and the dealer are retards for dealing with each other.

 

actually for some reason all the parts for the lnf are on back order or dealers don't carry them at all and have to get everything from a warehouse

my car sat at the dealership for two months b/c the turbochargers are on national backorder
its back at the dealership again waiting on another part but they said it shouldn't be too long they have the part at the warehouse in michigan.

but its no guarantee that his tune his tune is what caused damaged to his car, a lot of people have had motor problems with the lnf's stock

 

The LSD transmissions ship fast got to STL from Michigan in like 2 days lol

 

You have to monitor when you are tuning the car. Especially knock and A/F ratio.

 

most dealers are rip offs a dealer quoted me 6k for a new stock long block

 

To have one installed, or just the parts?

 

That was full install for what the said was a lower end rod knock for when I took off the valve cover and the exhaust rockers had ate them selfs

 

Well I might be going HPT, but now I'm not sure.

 

That isn't a rip off. If they misdiagnosed it then that's different, but that price for a brand new engine with labor included is a good deal.

 

I have seen 0 compression where you would think it was just a base misfire. Worn valve guides can cause no compression and total leakdown while displaying few driveability symptoms other than misfires and smoke. A compression test is about as easy as it gets. If they said it came up zero, it probably did.

 

I'm not arguing with you, and there is still some vagueness from the OP...

But I would think (from personal experience) that with compression so low on all the cylinders and 0 in another, it would barely run and would misfire badly. It would be very noticeable to the driver and would feel very underpowered. Weird that all the OP noticed was a little bit of blue smoke out the exhaust. I'm not saying it's not true, just a little odd.

I hope it all works out for him.

 

Its covered! Just got the word.

BlueTurbo, my valve train has been very loud since I bought the car last summer. Maybe the valve guides are to blame. The tear down starts early next week so I'll know what went wrong soon.

 

Congrats.

 

Sounds near identical to mine. Random boost loss, misfires, lifter noise, what sounds like valves smacking, etc. Mine goes in next Tuesday to begin teardown and determine what parts need replacing. My friend had similar problems and they ended up replacing the entire valvetrain amongst other powertrain related parts. Root cause = valves on 3 and 4 STI kit open resulting in compression loss and the whole bit. This is obnoxious with only 37000km on the car.

I'm going to get OnStar to provide me the new codes that came up on top of what I already had and start a thread documenting it start to finish so others know what signs to look for.

 

Well, I finally have been told what went wrong. The rings are toast and piston number 3 is cracked between the rings! I have never heard of this happening to any other LNF. The dealership is replaceing the cracked piston, replaceing the other rings, honning the cylinders and replaceing the head. They are telling me I must has been over reving the motor. I had the gms1 on the car since last summer (6500 redline) and the redline was bumped to 7000 on the new tune which was only on there for a few weeks. I can not recall ever hitting the rev limiter. Any Ideas?

 

Ringland failure is pretty common on these motors if there is excessive heat build up. Over-boosting the stock turbo is the most common. Some have said they ran 30 PSI without issue, but it's all in the tune I guess.

 

Ringland failure with an aggressive tune? I'm shocked, SHOCKED!

It's not overreving that cracks them. It's a combination of too much boost/timing/knock. These motors are quite stout, so if you cracked one, go looking at the tune, and I don't mean GMS1...

 

ok ok
lots of stuff going on in here.
1 stock lnfs have been know to have ring failure
2. gmpp tune has been data logged and shown to cause knock and engine failure
3. after market tunes if not tuned right can cause knock or not enough cooling mods and to much psi= engine failure
4. it could b a number of things that caused this to fail, car could have been on the verge of failing and the little extra added hp from the other tune just made it finally fail.


5. wasnt it a few weeks ago byt was blamed for a engine failure and the tune was perfect but in reality the customer gave him a broken car to begin with.
6. there is just not enough info to say hey the tuner caused it
7. byt had logs and gave a detailed explanation on what actually happened which proved it wasn't his fault. his tune was spot on but the car was doomed before it even got tuned
8 op hasn't stated psi or tuner who tuned it

 

23psi and the tuner is a well respected tuner.

 

id like to know who it was. at 23psi your making heat but not bad enough to crack a piston. The tune must have been really lean. I know of two tuners that run thier tunes lean... wonder if it was one of them...

 

30 psi for half year now and no probs. the main contributor to ring failure may be that people who are new to tuning ramp the dals up in the hpt program and what they dont know is even though they are getting a better throttle response the car is boosting sooner to meet the new dal requirements. essentially in short words the over increased dal chart starts going into pe mode on the throttle but leaves the air fuel ratio 14.7 which is way to hot and smokes internals. seen that on more than a few tunes and the idea is getting bumped arount the hpt forum pretty hard.

bottom line make sure your tuner has good dyno numbers and a shitload of tunes under his belt. i will list no names as i know at least 6 who are willing to help anyone and they all share my equal respect. find them they are well known amongst lnf owners.

 

From my personal experience its not always the boost. The more aggressively tuned a motor is, the easier it is for any sort of knock wot to destroy a motor. Knock destroys motors in any brand, design or make. That is why it is imperative to monitor knock. Even perfect tunes can knock under certain circumstances, that is why you need to monitor, and if it shows up, get off of it! Most people just assume its the boost. Its a combination of a lot of things.

 

i agree but i still see the boosting in upper mid range more than i see knock as people disregard the afr when tuning the dals by only changing the pe enrich and tuning the rest for maf calibrations. any knock is usually removed when modifiying the spark tables during changes

 

Well the dealer cracked my block taking out the pistons so I'm actually getting a complete new motor! I'm very happy because I wasn't really feeling this half rebuilt idea. The tool they were using to remove the piston cracked a small peice off so a new long block is ordered. Will there be a new turbo included with that?