Motor bad already!!!!
12-21-2011, 07:12 PM
#1
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Motor bad already!!!!
My motor was replaced about 5k ago due to #1 piston melting #3 piston cracking. Gm gave me a brand new motor and etc. Now the motor already has a low end knock. I really dont know if will be able to get warrantied again.
12-21-2011, 07:29 PM
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Take it to another dealer, gotta get it fixed though and I know if it was me I would rather try to get it warrantied again before it comes out of my pocket. Let them investigate, if its a stock tune what are they going to find??
12-21-2011, 10:18 PM
#15
The last engine blew. A brand new one was installed. Everything was fine with that new engine for 4,500 miles. Then when only one week, 500 miles on the tune, it is acting up again... and you know it's not the tuner's fault...
This can only be one of two things: Either there's more going on here than what you're saying, and that's how you know it's not the tuner's fault... or it's the tuner's fault. lol
BYT is a very experienced tuner, but regardless, every car is different, sometimes experienced people can make mistakes, and sometimes things just fail when pushed too. Engines don't just burn up. Either there's a physical issue, a tuning issue, or something eventually weakens/wears out. Considering that this was a brand spankin' new engine, then that takes out the third possibility, leaving either a physical issue or tuning issue. Did you get a retune with the new engine?... It's not the same engine as the old one and could have completely different tuning needs, and if the old one got trashed on that tune, then why would you logically want to re-run that tune again anyway?
This doesn't really add up.
Last edited by Stamina; 12-21-2011 at 10:25 PM.
12-21-2011, 10:28 PM
#16
So, let me make sense of this...
The last engine blew. A brand new one was installed. Everything was fine with that new engine for 4,500 miles. Then when only one week, 500 miles on the tune, it is acting up again... and you know it's not the tuner's fault...
This can only be one of two things: Either there's more going on here than what you're saying, and that's how you know it's not the tuner's fault... or it's the tuner's fault. lol
BYT is a very experienced tuner, but regardless, every car is different, sometimes experienced people can make mistakes, and sometimes things just fail when pushed too. Engines don't just burn up. Either there's a physical issue, a tuning issue, or something eventually weakens/wears out. Considering that this was a brand spankin' new engine, then that takes out the third possibility, leaving either a physical issue or tuning issue. Did you get a retune with the new engine?... It's not the same engine as the old one and could have completely different tuning needs, and if the old one got trashed on that tune, then why would you logically want to re-run that tune again anyway?
This doesn't really add up.
The last engine blew. A brand new one was installed. Everything was fine with that new engine for 4,500 miles. Then when only one week, 500 miles on the tune, it is acting up again... and you know it's not the tuner's fault...
This can only be one of two things: Either there's more going on here than what you're saying, and that's how you know it's not the tuner's fault... or it's the tuner's fault. lol
BYT is a very experienced tuner, but regardless, every car is different, sometimes experienced people can make mistakes, and sometimes things just fail when pushed too. Engines don't just burn up. Either there's a physical issue, a tuning issue, or something eventually weakens/wears out. Considering that this was a brand spankin' new engine, then that takes out the third possibility, leaving either a physical issue or tuning issue. Did you get a retune with the new engine?... It's not the same engine as the old one and could have completely different tuning needs, and if the old one got trashed on that tune, then why would you logically want to re-run that tune again anyway?
This doesn't really add up.
12-21-2011, 10:33 PM
#17
Regardless of a good or bad tune. GM is going to take a much closer look at such a new engine going bad when they already covered 1. Going to a different dealer isn't going to avoid that probably like it would over a cheap issue.
Still sounds weird that it suddenly goes bad 500 miles after the new tune. Did you actually retune with the new engine or just throw the old one back on and hope everything else is the same?
Still sounds weird that it suddenly goes bad 500 miles after the new tune. Did you actually retune with the new engine or just throw the old one back on and hope everything else is the same?
12-21-2011, 10:58 PM
#18
how are u seeing this low end knock? these cars have some low end knock, mine has done it since day one. like up to 5 degrees, thats how they are, unless u actually hear it, but if ur just seeing it on a dashdaq or something, i wouldnt worry
12-21-2011, 11:04 PM
#19
What sounds wierd is if its a lower end knock. (The tune wont cause this unless its made to much power or op got on it to early before break in was done) Alot of people blame tuners for blowing or somthign to the sort. But alot of the time its the person drive the car. In order for a engine to last, the owner needs to keep up with it doing regular maintance, plugs, seafoamings, relogging to make sure all is well when fueling change (its what i recommend) some dont but hey it helps to make sure....
12-21-2011, 11:13 PM
#20
What sounds wierd is if its a lower end knock. (The tune wont cause this unless its made to much power or op got on it to early before break in was done) Alot of people blame tuners for blowing or somthign to the sort. But alot of the time its the person drive the car. In order for a engine to last, the owner needs to keep up with it doing regular maintance, plugs, seafoamings, relogging to make sure all is well when fueling change (its what i recommend) some dont but hey it helps to make sure....
I've heard of the valvetrain on the LNF getting noisy as the engine accrues mileage, causing false KR, but once again that may not be the case here unless the dealer only swapped the shortblock or something, and reused the head, chains, etc.
Last edited by Stamina; 12-21-2011 at 11:40 PM. Reason: Correction
12-22-2011, 12:54 AM
#22
Senior Member
5 degree KR? Mind did that intermittently and after I'd swapped out the upstream O2, all is well again.
12-22-2011, 01:24 AM
#23
Senior Member
Yeah, normally I'd agree on all counts, but this engine may have only needed one oil change so far, and had no need for new plugs, seafoam, etc. yet being that it was so new, so it takes out some of those variables. That would mean bad break-in or perhaps some sort of sensor/car issue causing it to happen or happen again.
I've heard of the valvetrain on the LNF getting noisy as the engine accrues mileage, causing false KR, but once again that may not be the case here unless the dealer only swapped the shortblock or something, and reused the head, chains, etc.
I've heard of the valvetrain on the LNF getting noisy as the engine accrues mileage, causing false KR, but once again that may not be the case here unless the dealer only swapped the shortblock or something, and reused the head, chains, etc.
I agree 100%.
12-22-2011, 02:06 AM
#24
Senior Member
yeah its too many loose ends in this post, but i am thinking either they didn't replace the entire motor just pieced it back together, could be a tuning issue, or just driver abuse. but you should be lucky you got whatever work that you got done before, I had motor issues with my car dealerships wouldn't even touch my car still battling with gm while i rebuild it myself, the more you drive the car the worse the problem will get
