I have the dreaded lifter knock - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

MiniBig · 03-07-2018, 07:26 AM

My Z has a knock in the right bank after the car warms up. The knock seems like it comes and goes, it does get real loud at times. Took it to the dealer and they are taking it in on Monday to see what they find. It's still under drivetrain warranty. I'm very nervous about them cracking open my engine, but thought they were the best place to start. I plan on some hp mods in the future. curious what you guys think........Sam.

aris · 03-07-2018, 12:41 PM

Do you have any video that captures the sound?

Gbland60 · 03-07-2018, 01:08 PM

Sometimes i can hear a light tapping on the right bank also thru my exhaust on first start up but goes away when warmed up. Im always listening to the exhaust for anything that sounds odd.Would be nice if one specific noise fit one specific problem but a tapping lifter sound could be several things.Well if your planning on upgrades in the future, its probably a good thing something showed up now and not later , depending on what upgrades you had in mind.Good luck friend on everything. Please do keep us updated though on their findings. Im sure EVERYONE on here would want to know

hjdca · 03-07-2018, 02:25 PM

Quote:

Originally Posted by MiniBig

My Z has a knock in the right bank after the car warms up. The knock seems like it comes and goes, it does get real loud at times. Took it to the dealer and they are taking it in on Monday to see what they find. It's still under drivetrain warranty. I'm very nervous about them cracking open my engine, but thought they were the best place to start. I plan on some hp mods in the future. curious what you guys think........Sam.

How many miles are on your Z/28 ?

MiniBig · 03-07-2018, 03:03 PM

Quote:

Originally Posted by hjdca

How many miles are on your Z/28 ?

18296 miles. I will try to get a video with the tapping sound.

Gbland60 · 03-07-2018, 05:01 PM

Wonder if he has an injector issue. They do make a loud tapping noise. Guess we'll see with video or when they tear into it. Im curious now as to what

Gbland60 · 03-10-2018, 03:35 AM

Sorry about last post. Cant download for crap. On C6 ZR1 ZO6 forum page 3 towards the bottom of page it reads [ZO6] LS7 lifter gone bad ,time for upgrades. Or close to that. Its a really good read with all the info and issues they have had over the years with the LS7. Some things i didnt know. I just thought maybe you would like to read it. Just trying to help you out. Good luck on Monday hope its a small issue. Please do keep us updated. Thanks

MiniBig · 03-10-2018, 02:10 PM

Quote:

Originally Posted by Gbland60

Sorry about last post. Cant download for crap. On C6 ZR1 ZO6 forum page 3 towards the bottom of page it reads [ZO6] LS7 lifter gone bad ,time for upgrades. Or close to that. Its a really good read with all the info and issues they have had over the years with the LS7. Some things i didnt know. I just thought maybe you would like to read it. Just trying to help you out. Good luck on Monday hope its a small issue. Please do keep us updated. Thanks

Thank you very much Gbland for the kind words. I haven't started it up yet to take a video. I will read that post ,any info I have will help. Thanks again!!

hjdca · 03-10-2018, 02:30 PM

At 18K+ miles, you are obviously a street driver and one of the pioneers regarding mileage on the LS7 in the Z/28. I am about 9K miles myself and also drive it all on the street, not the track.

Usually valve train noise, like lifters, is straightforward to figure out. Use one of those cheap hearing stethoscopes you get from pep boys, and you should be able to tell if it is the injectors ticking or the drive train. Just out of curiosity, I know it has nothing to do with it, but, who assembled your motor ? Mine is a 2015 Z/28, assembled by Mike Priest.

2013blackgt · 03-10-2018, 02:53 PM

Mr. Priest built mine also.

Gbland60 · 03-13-2018, 07:26 PM

Sorry been busy working. You welcome brother. We're all brothers here. hjdca: thats what i did when i first bought mine. Started with a reference point and have listened a few times since. Only noise that is pronounced is the injectors on mine. I've read some interesting stuff about the c6 zo6 LS7s but so far i have to have faith in general motors that the jead issue was fixed. So far jist a couple of Z28 owners with engines issues is not enough yet to convince me other wise. I just hope im right in my way of thinking because i dig this car. CARBON FOOTPRINT!!!!! WHAT'S THAT ???? catch my drift. Lol

Fusionofideas · 03-16-2018, 12:09 AM

We just had our motor replaced after floating a valve. GM did a full LS7 replacement. New motor is running like a champ.

Z/28Dan · 03-16-2018, 05:53 AM

Quote:

Originally Posted by Fusionofideas

We just had our motor replaced after floating a valve. GM did a full LS7 replacement. New motor is running like a champ.

Was this a warranty replacement?

1970judge · 03-16-2018, 06:42 AM

Quote:

Originally Posted by Gbland60

Sorry been busy working. You welcome brother. We're all brothers here. hjdca: thats what i did when i first bought mine. Started with a reference point and have listened a few times since. Only noise that is pronounced is the injectors on mine. I've read some interesting stuff about the c6 zo6 LS7s but so far i have to have faith in general motors that the jead issue was fixed. So far jist a couple of Z28 owners with engines issues is not enough yet to convince me other wise. I just hope im right in my way of thinking because i dig this car. CARBON FOOTPRINT!!!!! WHAT'S THAT ???? catch my drift. Lol

Ha! Besides, you live in Bridge City right? Tailpipe emissions are the least of that areas concerns LOL

03-07-2018, 07:26 AM	#1
MiniBig Drives: 2014 Z/28 #398 Join Date: Dec 2014 Location: Homewood Posts: 219	I have the dreaded lifter knock My Z has a knock in the right bank after the car warms up. The knock seems like it comes and goes, it does get real loud at times. Took it to the dealer and they are taking it in on Monday to see what they find. It's still under drivetrain warranty. I'm very nervous about them cracking open my engine, but thought they were the best place to start. I plan on some hp mods in the future. curious what you guys think........Sam.

03-10-2018, 02:30 PM	#9
hjdca Drives: 2015 Z/28 Black Join Date: Nov 2016 Location: Los Angeles Posts: 340	At 18K+ miles, you are obviously a street driver and one of the pioneers regarding mileage on the LS7 in the Z/28. I am about 9K miles myself and also drive it all on the street, not the track. Usually valve train noise, like lifters, is straightforward to figure out. Use one of those cheap hearing stethoscopes you get from pep boys, and you should be able to tell if it is the injectors ticking or the drive train. Just out of curiosity, I know it has nothing to do with it, but, who assembled your motor ? Mine is a 2015 Z/28, assembled by Mike Priest. __________________ 2015 Black Z/28 70 Chevelle SS396 01 M3, 88 Land Cruiser

03-10-2018, 02:53 PM	#10
2013blackgt Drives: Sedan Join Date: Feb 2013 Location: Aurora Posts: 124	Mr. Priest built mine also. __________________ ]

03-07-2018, 12:41 PM	#2
aris Drives: Z/28 Join Date: Jan 2015 Location: Bay Area Posts: 274	Do you have any video that captures the sound?

03-07-2018, 01:08 PM	#3
Gbland60 Drives: 2015 z28 Black w/ac #645 Join Date: Jan 2017 Location: Southeast Texas Posts: 337 View My Garage	Sometimes i can hear a light tapping on the right bank also thru my exhaust on first start up but goes away when warmed up. Im always listening to the exhaust for anything that sounds odd.Would be nice if one specific noise fit one specific problem but a tapping lifter sound could be several things.Well if your planning on upgrades in the future, its probably a good thing something showed up now and not later , depending on what upgrades you had in mind.Good luck friend on everything. Please do keep us updated though on their findings. Im sure EVERYONE on here would want to know

03-07-2018, 05:01 PM	#6
Gbland60 Drives: 2015 z28 Black w/ac #645 Join Date: Jan 2017 Location: Southeast Texas Posts: 337 View My Garage	Wonder if he has an injector issue. They do make a loud tapping noise. Guess we'll see with video or when they tear into it. Im curious now as to what

03-10-2018, 03:35 AM	#7
Gbland60 Drives: 2015 z28 Black w/ac #645 Join Date: Jan 2017 Location: Southeast Texas Posts: 337 View My Garage	Sorry about last post. Cant download for crap. On C6 ZR1 ZO6 forum page 3 towards the bottom of page it reads [ZO6] LS7 lifter gone bad ,time for upgrades. Or close to that. Its a really good read with all the info and issues they have had over the years with the LS7. Some things i didnt know. I just thought maybe you would like to read it. Just trying to help you out. Good luck on Monday hope its a small issue. Please do keep us updated. Thanks

03-13-2018, 07:26 PM	#11
Gbland60 Drives: 2015 z28 Black w/ac #645 Join Date: Jan 2017 Location: Southeast Texas Posts: 337 View My Garage	Sorry been busy working. You welcome brother. We're all brothers here. hjdca: thats what i did when i first bought mine. Started with a reference point and have listened a few times since. Only noise that is pronounced is the injectors on mine. I've read some interesting stuff about the c6 zo6 LS7s but so far i have to have faith in general motors that the jead issue was fixed. So far jist a couple of Z28 owners with engines issues is not enough yet to convince me other wise. I just hope im right in my way of thinking because i dig this car. CARBON FOOTPRINT!!!!! WHAT'S THAT ???? catch my drift. Lol

03-16-2018, 12:09 AM	#12
Fusionofideas Drives: 2015 Z28, C7 Corvette, Evo X Join Date: Jul 2013 Location: Irvine Posts: 211	We just had our motor replaced after floating a valve. GM did a full LS7 replacement. New motor is running like a champ.