Please help! Terrible engine knock at 30k - Page 3 - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

RichSS2006 · 09-08-2016, 08:53 PM

Quote:

Originally Posted by tlavoie87

i dont get why so many llt have issues im going on 95K with zero issues with the motor and its blown.. MAINTENANCE, MAINTENANCE , MAINTENANCE take care of it it takes care of you ..tons of people knocking the llt

Totally agree.

arkentect · 09-09-2016, 08:11 AM

Quote:

Originally Posted by tlavoie87

i dont get why so many llt have issues im going on 95K with zero issues with the motor and its blown.. MAINTENANCE, MAINTENANCE , MAINTENANCE take care of it it takes care of you ..tons of people knocking the llt

tons of people are knocking the LLT because tons of LLTs are knocking. Even with maintenance correctly done and on time or even early people are having spun bearings and time chain issues, hell even having oil disappear into thin air. Just because you were a lucky one to get through 95k miles without any issues doesnt make yours the majority. I can't even be biased in this situation, but the LLT is a shit motor that was replaced for good reason.

TooCool5 · 09-09-2016, 05:00 PM

Quote:

Originally Posted by arkentect

tons of people are knocking the LLT because tons of LLTs are knocking. Even with maintenance correctly done and on time or even early people are having spun bearings and time chain issues, hell even having oil disappear into thin air. Just because you were a lucky one to get through 95k miles without any issues doesnt make yours the majority. I can't even be biased in this situation, but the LLT is a shit motor that was replaced for good reason.

I believe there were a bad lot of motors out there.
There is a "blown motor" thread where members indicated Jan - Mar 2010 builds in a certain plant down south? Can't remember exactly.
Maybe someone can find the thread.
Edit: Found the thread.
http://www.camaro5.com/forums/showth...t=blown+engine

All I know is some go the distance, some do not. For instance Member PieNsky
has over 190k on his LLT before he turned it over to his son.
He bought his LS in 2009 when I did.

arkentect · 09-12-2016, 08:30 AM

Quote:

Originally Posted by TooCool5

I believe there were a bad lot of motors out there.
There is a "blown motor" thread where members indicated Jan - Mar 2010 builds in a certain plant down south? Can't remember exactly.
Maybe someone can find the thread.
Edit: Found the thread.
http://www.camaro5.com/forums/showth...t=blown+engine

All I know is some go the distance, some do not. For instance Member PieNsky
has over 190k on his LLT before he turned it over to his son.
He bought his LS in 2009 when I did.

I know about the thread, I think I was part of it or at least added mine to the list. Its still a limited motor with a very limited ECU

TooCool5 · 09-13-2016, 02:08 PM

Quote:

Originally Posted by arkentect

I know about the thread, I think I was part of it or at least added mine to the list. Its still a limited motor with a very limited ECU

Come on, the thread was from 2013, you joined 2015.

acammer · 09-13-2016, 02:15 PM

Quote:

Originally Posted by TooCool5

Come on, the thread was from 2013, you joined 2015.

Hard to imagine somebody using the search function and seeing a thread that pre-dates their join date. Wait, no it's not.

You did see he said "I think I was part of it", right? So, he didn't chime in, doesn't mean he didn't see it.

arkentect · 09-14-2016, 08:24 AM

Quote:

Originally Posted by TooCool5

Come on, the thread was from 2013, you joined 2015.

I've seen that one as well, but I'm pretty sure there's a longer more up to date thread too.

I understand that you feel the need to defend your beloved Camaro because all-in-all yours has been fairly dependable. But when the forum hosts 2-3 threads per month on a failed LLT motor, there's something wrong. If it were only spun bearings causing the failures then we could blame the batch of bearings used in a certain production window. But the fact is there are numerous issues that have been causing the failures, spun bearings, Oil consumption, timing chains just to name a few.

I may have joined in 2015 but at least I can see the evidence in front of me.

shrinkdoc · 09-15-2016, 05:21 PM

Quote:

Originally Posted by jrhagen

30K is a bit past redline.

A bit of a knock past 30k RPM can be expected.

shrinkdoc · 09-15-2016, 05:24 PM

Quote:

Originally Posted by R3VOLT

The oil was a little low but not completely dry. The oil is thick and brown with no unique smell or metal flakes. Like I said I doubt they used dextos approved or even changed the filter but still as long as there was oil it should not have had that much of an impact. Not a single code or any warning lights just the terrible sound/s. I am really struggling with just ripping the motor apart but don't want to waste my time if it is not able to be repaired. I think a timing chain is ruled out leaving just a spun bearing/thrown rod

. I have been trying to find a replacement bearing kit to no avail. If I'm going in I'm doing all of them along with any other upgrades while in there. Just don't want to waste the time if I don't need to but if that's what I have to do then so be it!

Sounds like it wasn't taken care of, oil shouldn't be thick and brown, should look like oil not BM.

shrinkdoc · 09-15-2016, 05:29 PM

Quote:

Originally Posted by R3VOLT

So when you swapped motors, did you get another LLT or was it an LFX? What I'm hearing from a certified Chevy dealer guy is the LLT was known for this problem due to the screen clog under the cam actuator which in turn does not allow the oil to pass thru ultimately leading to the problems with the spun bearing, rod knock and piston slap. The LLT sounds like a ticking time bomb that should be a class action lawsuit. Apparently Chevy is/was very aware of this hence the new design in 2012-15 motors.

If ugo LFX you can't use your headers.

VEESIKS · 09-16-2016, 05:36 PM

Definitely want to avoid starting it any more. Most dealers don't even mess with rebuilds they just throw a new long block in there. If you can find a decent machine shop/engine builder you may be able to save some money. Good luck

R3VOLT · 10-18-2016, 08:33 PM

Not looking for any sympathy...just some help from the all the knowledgable classy Camaro driving humans on this forum

So took off the only thing I upgraded Cold Air Inductions (CAI) and looking inside the Throttle Body the butterfly is not strait up and down but almost a 1/2 inch of oil stain as to where it should normally sit. Not sure what is up with that??

Exhaust, cats and ex manifolds have been removed and the oil drained along with the filter removed. The filter has very fresh small metal shavings in it and after running a brand new magnet through the old oil with motor medic in it I couldn't find anything in the old oil that made it past the filter.

I have to pull the intake man to port and polish and install VMAX black ice'olater so that's coming off but I'm still trying to get to the root issue on the engine. I thought someone was telling me to drop the oil pan to look at bearings/rods but I also seen a post saying something about 8+ hours??!!??

Someone else here is saying timing chain.....next step?????

MrChrisLS3 · 10-19-2016, 02:11 AM

Quote:

Originally Posted by R3VOLT

Not looking for any sympathy...just some help from the all the knowledgable classy Camaro driving humans on this forum

So took off the only thing I upgraded Cold Air Inductions (CAI) and looking inside the Throttle Body the butterfly is not strait up and down but almost a 1/2 inch of oil stain as to where it should normally sit. Not sure what is up with that??

Exhaust, cats and ex manifolds have been removed and the oil drained along with the filter removed. The filter has very fresh small metal shavings in it and after running a brand new magnet through the old oil with motor medic in it I couldn't find anything in the old oil that made it past the filter.

I have to pull the intake man to port and polish and install VMAX black ice'olater so that's coming off but I'm still trying to get to the root issue on the engine. I thought someone was telling me to drop the oil pan to look at bearings/rods but I also seen a post saying something about 8+ hours??!!??

Someone else here is saying timing chain.....next step?????

98% sure it's a spun bearing. I would think if it were the timing chain you would have misfire issues galore, not to mention valves hitting pistons. Other than the noise, it sounds like the engine is firing okay. If this just started, there may not be too much collateral damage to the engine. You will need a new set of bearings, more likely than not a new crank, unless this one can be polished out. If it's a rod bearing, then you'll probably need a new rod, as this one is probably out of round.

You can probably get away with a remanufactured crank with oversized bearings, which will reduce the part cost by quite a bit. I went this route with a Corvette LT4 motor and got 80K+ more not so gentle miles on the engine. I'm not real familiar with the LLT engine, but have read where there is an issue with some of the timing chains, this might be a 'while the engines out' type of thing for you.

R3VOLT · 11-09-2016, 06:22 PM

So now what are my options. Do they make a rebuild kit. I don't really want to put a rebuild in it but I would rather upgrade everything possible on the LLT. Did I see a stroker option...if I'm going to rebuild it I want to replace it all with new upgrades. Any info, options or opinions are welcome. Like I said I have all the toys for the motor but I want to build it to last.

09-16-2016, 05:36 PM	#39
VEESIKS formerly 2011Camaro Drives: 2011 Camaro LS IBM M6 Join Date: Jul 2010 Location: Fredericksburg, VA Posts: 816	Definitely want to avoid starting it any more. Most dealers don't even mess with rebuilds they just throw a new long block in there. If you can find a decent machine shop/engine builder you may be able to save some money. Good luck __________________ Born on the Island and raised in the sand. Semper Fidelis

10-18-2016, 08:33 PM	#40
R3VOLT Drives: 2010 1LT / LE 600 Join Date: Jul 2016 Location: Milwaukee, Wi Posts: 18	Sorry been busy as hell and Grandpa's got pancreatic cancer. Not looking for any sympathy...just some help from the all the knowledgable classy Camaro driving humans on this forum So took off the only thing I upgraded Cold Air Inductions (CAI) and looking inside the Throttle Body the butterfly is not strait up and down but almost a 1/2 inch of oil stain as to where it should normally sit. Not sure what is up with that?? Exhaust, cats and ex manifolds have been removed and the oil drained along with the filter removed. The filter has very fresh small metal shavings in it and after running a brand new magnet through the old oil with motor medic in it I couldn't find anything in the old oil that made it past the filter. I have to pull the intake man to port and polish and install VMAX black ice'olater so that's coming off but I'm still trying to get to the root issue on the engine. I thought someone was telling me to drop the oil pan to look at bearings/rods but I also seen a post saying something about 8+ hours??!!?? Someone else here is saying timing chain.....next step?????

11-09-2016, 06:22 PM	#42
R3VOLT Drives: 2010 1LT / LE 600 Join Date: Jul 2016 Location: Milwaukee, Wi Posts: 18	Engine is out and it was spun bearing,What Now?? So now what are my options. Do they make a rebuild kit. I don't really want to put a rebuild in it but I would rather upgrade everything possible on the LLT. Did I see a stroker option...if I'm going to rebuild it I want to replace it all with new upgrades. Any info, options or opinions are welcome. Like I said I have all the toys for the motor but I want to build it to last.