Carbon build-up service

ramair00 · 02-07-2022, 04:04 PM

I didn't install catch can. I have 33,000 miles on my 2017 ZL1. Is there a preferred
carbon build up service for the intake valves.

Gunkk · 02-07-2022, 04:15 PM

ramair00 · 02-18-2022, 11:42 PM

Quote:

Originally Posted by Gunkk

What the hell was your problem! ?

hawk02 · 02-19-2022, 06:56 AM

Quote:

Originally Posted by ramair00

I didn't install catch can. I have 33,000 miles on my car. 2017. Is there a preferred
carbon build up service for the intake valves.

Check with your local dealers to see what they recommend.

I’ve never kept my Camaros long enough to put the miles on them needed to do an intake cleaning (only have 14K miles on my ‘17 ZL1). However, I have had intake cleaning done through the dealer on three different daily drivers around the 30,000 to 40,000 mile range. Never any issues with performance or check engine lights following the clean outs.

Spaceme1117 · 02-19-2022, 07:06 AM

LT1 engine really doesn't need any carbon cleaning of the intake valves. For whatever reason, the LT1 is significantly less affected as a DI engine.

Stephen12ZL1 · 02-19-2022, 07:08 AM

take it to the track!

arpad_m · 02-19-2022, 07:19 AM

Quote:

Originally Posted by ramair00

What the hell was your problem! ?

He doesn't like what catch can threads devolve into. (I think your question was genuine and in no way trolling, I disagree with the call here.)

Quote:

Originally Posted by Spaceme1117

LT1 engine really doesn't need any carbon cleaning of the intake valves. For whatever reason, the LT1 is significantly less affected as a DI engine.

Might be because it has "half a catch can" from the factory already, that is, a clean side oil separator.

pauly1119 · 02-19-2022, 09:04 AM

I’ve cleaned older vehicles with over the counter cleaners. Removed the intake and cleaned it off the car away from any air sensors.

Smokin19 · 02-19-2022, 09:12 AM

In the process of my build here is a pick of the valves before some light cleaning per mechanic. Engine has 10 K on it and hie said engine looks great with vlv's and guides well within spec. No catch can but, I am installing a MM catch can.

nighttowl · 02-19-2022, 10:51 AM

Quote:

Originally Posted by Smokin19

In the process of my build here is a pick of the valves before some light cleaning per mechanic. Engine has 10 K on it and hie said engine looks great with vlv's and guides well within spec. No catch can but, I am installing a MM catch can.

Why was the head removed?
Cam install?

Those valves look just as clean as a port injected engine.

Smokin19 · 02-19-2022, 07:12 PM

Quote:

Originally Posted by nighttowl

Why was the head removed?
Cam install?

Those valves look just as clean as a port injected engine.

Yes, cam install.

Idaho2018GTPremium · 02-19-2022, 09:45 PM

GM powertrain engineers thought about oil in the intake during development of the LT4:

"A PCV separator, which is unique to the LT4, was developed to keep oily air from being drawn through the intake, where it could end up collecting on the back of the intake valves. A little bit of oil on a port-injected engine can help lubricate valves, but because all Gen 5 V8s are direct injected, there's no fuel washing the back of the intake valve. That means oil in the PCV system can end up sticking to the back of the hot intake valves impeding airflow and eventually preventing the valves from seating properly."

Hopefully the valves stay pretty clean.

Source (this is a really good article on the LT4):https://www.motortrend.com/news/the-...e-z06s-lt4-v8/

KingLT1 · 02-20-2022, 07:29 AM

Run some DI valve cleaner that you spray through the throttle body with the engine running. CRC and STP both make these products and they work.

ramair00 · 02-20-2022, 05:45 PM

Quote:

Originally Posted by KingLT1

Run some DI valve cleaner that you spray through the throttle body with the engine running. CRC and STP both make these products and they work.

I used the STP just yesterday. Can't say I felt any difference in performance, but didn't
have any symtoms to begin with, just 33,000 miles. Feel valves were fairly clean based on what you guys posted.

Thanks

02-07-2022, 04:04 PM	#1
ramair00 Drives: 2017 ZL1 Coupe White A10 Join Date: Feb 2017 Location: Dothan,AL Posts: 86	Carbon build-up service I didn't install catch can. I have 33,000 miles on my 2017 ZL1. Is there a preferred carbon build up service for the intake valves. Last edited by ramair00; 02-20-2022 at 05:48 PM.

02-19-2022, 07:08 AM	#6
Stephen12ZL1 Drives: '21 ZLE A10 Join Date: May 2012 Location: Mechanicsville, VA Posts: 6,809	take it to the track! __________________ '21 ZLE A10 Wild Cherry PDR 2:00.78 VIR Full 10.68@131.69 1.68 60' '17 ZL1 A10 Mosaic Black PDR/Nav 2:03.08 VIR Full 11.003@129.2 1.75 (sold) '15 Z/28 #325 Black a/c & stereo. 2:10.1 VIR Full (sold) '12 ZL1 A6 Black 10.52@131 1.55 60' 2:13 VIR Full (sold)

02-19-2022, 09:12 AM	#9
Smokin19 Drives: 19' ZL1 A10, w/pdr Join Date: Sep 2014 Location: S.W. ohio Posts: 1,557	In the process of my build here is a pick of the valves before some light cleaning per mechanic. Engine has 10 K on it and hie said engine looks great with vlv's and guides well within spec. No catch can but, I am installing a MM catch can. Attached Images __________________ BTR Stg II cam w/ 38% fuel lobe, ARH 2" headers into 3" w/cats, AWE Touring, Kong X port, Weapon X triple ht exchangers, NW 103, Rotofab big gulp, DSX lowside, TCM tune, BMR Lockout, Mustang dyno 720 rwhp, 634 rwtq on 93 pump.

02-19-2022, 09:45 PM	#12
Idaho2018GTPremium Drives: 2021 Camaro ZL1 A10 Join Date: Nov 2018 Location: Idaho Posts: 1,212	GM powertrain engineers thought about oil in the intake during development of the LT4: "A PCV separator, which is unique to the LT4, was developed to keep oily air from being drawn through the intake, where it could end up collecting on the back of the intake valves. A little bit of oil on a port-injected engine can help lubricate valves, but because all Gen 5 V8s are direct injected, there's no fuel washing the back of the intake valve. That means oil in the PCV system can end up sticking to the back of the hot intake valves impeding airflow and eventually preventing the valves from seating properly." Hopefully the valves stay pretty clean. Source (this is a really good article on the LT4):https://www.motortrend.com/news/the-...e-z06s-lt4-v8/ __________________ 2021 Camaro ZL1 A10 2022 GR Supra 3.0 Past: 2018 Mustang GT Premium w/ PP1, MR, and A10 2007 MazdaSpeed3 1995 Pontiac Trans Am 1987 Camaro Z28

02-20-2022, 07:29 AM	#13
KingLT1 Drives: 2016 1SS NFG A8 Join Date: Aug 2017 Location: 46804 Posts: 6,800	Run some DI valve cleaner that you spray through the throttle body with the engine running. CRC and STP both make these products and they work. __________________ 2016 NFG 1SS A8 Options-2SS Leather/NPP Perf. mods-Whipple 2.9/Fuel System/Flex Fuel/103mm TB/Rotofab Big Gulp/Cat Deletes/Corsa NPP Per. times- 10.5 @ 137 w/ 1.8 60ft Full weight on 20's 1200DA

02-07-2022, 04:15 PM	#2
Gunkk Thank you Al Oppenheiser! Drives: Red Hot A10 ZL1 Convertible Join Date: Jun 2017 Location: Sarasota, FL Posts: 4,978 View My Garage

02-19-2022, 07:06 AM	#5
Spaceme1117 Drives: 2017 Camaro SS, 2011 Corvette GS Join Date: Feb 2019 Location: Erlanger, Kentucky 41018 Posts: 815	LT1 engine really doesn't need any carbon cleaning of the intake valves. For whatever reason, the LT1 is significantly less affected as a DI engine.

02-19-2022, 09:04 AM	#8
pauly1119 Drives: 2018 ZLE Join Date: Feb 2018 Location: Palm City Fl Posts: 1,347	I’ve cleaned older vehicles with over the counter cleaners. Removed the intake and cleaned it off the car away from any air sensors.

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