Help with vacuum lines - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Juansehm10 · 09-01-2024, 01:01 AM

A while back, the engine belt on my camaro (L99 engine) had to be replaced because somehow, from what I understand, a vacuum hose got in the way and damaged the belt and also de hose was cut. My mechanic said it was fine to just take the hose from the vacuum out and just put a plug in the hole where it use to connect. i did that and have never noticed anything strange. but now i really wonder what was the function of that hose? I tried looking up the part, finding if it connected to something else to other hole in the engine but i cant find any information. i attached a picture so you see what I am talking about. the house used to connect to the hole im pointing at. does anyone know what it is and if I should fix this? or trust my mechanic? In the picture i took out the plug I normally have on it so dust doesnt get inside.

InFiD3ViL · 09-01-2024, 02:12 AM

That looks like the vacuum port for your passenger side valve cover. It is all part of the PCV system in these cars. I don't remember the exact routing since I have a catch can installed, but I believe that one gets connected into your cold air intake tube. Stock CAI or not, there should be a provision or port for you to connect this back up properly. I am sure someone else will confirm proper routing.

Personally, I would find a way to get this reconnected. It should be a cheap fix with a visit to the parts store for some vacuum hose and maybe a barbed fitting, depending on if you are still running the stock air box or an aftermarket CAI.

acutron42 · 09-01-2024, 05:03 AM

InFiD3ViL is correct & here is a link to the part you need for a stock air box. I would not trust this mechanic.

https://www.amazon.com/Genuine-GM-Tu.../dp/B00TAB330E

1JEWLDSSRS · 09-01-2024, 10:42 AM

As stated above, these guys are correct. That hose supplies fresh air into the crankcase for the PCV system. I would get it hooked back up. Easy fix.

09-01-2024, 01:01 AM	#1
Juansehm10 Drives: Camaro ss 2014 Join Date: Dec 2023 Location: Miami Posts: 3	Help with vacuum lines A while back, the engine belt on my camaro (L99 engine) had to be replaced because somehow, from what I understand, a vacuum hose got in the way and damaged the belt and also de hose was cut. My mechanic said it was fine to just take the hose from the vacuum out and just put a plug in the hole where it use to connect. i did that and have never noticed anything strange. but now i really wonder what was the function of that hose? I tried looking up the part, finding if it connected to something else to other hole in the engine but i cant find any information. i attached a picture so you see what I am talking about. the house used to connect to the hole im pointing at. does anyone know what it is and if I should fix this? or trust my mechanic? In the picture i took out the plug I normally have on it so dust doesnt get inside. Attached Images

09-01-2024, 02:12 AM	#2
InFiD3ViL Drives: 2010 CGM 2SS/RS LS3 Swapped A6 Join Date: Sep 2016 Location: Spring Hill, FL Posts: 4,737	That looks like the vacuum port for your passenger side valve cover. It is all part of the PCV system in these cars. I don't remember the exact routing since I have a catch can installed, but I believe that one gets connected into your cold air intake tube. Stock CAI or not, there should be a provision or port for you to connect this back up properly. I am sure someone else will confirm proper routing. Personally, I would find a way to get this reconnected. It should be a cheap fix with a visit to the parts store for some vacuum hose and maybe a barbed fitting, depending on if you are still running the stock air box or an aftermarket CAI. __________________ 2010 CGM Camaro 2SS LS3 Swapped A6 - GPI LS3 SS1 .647/.638, (224/237, 112 +4, 7º overlap) on CamMotion 8620 core, BTR Platinum .660" Dual Spring kit w/titanium retainers, CHE bronze trunnion upgrade, stock heads milled @ .015, Melling HV 10296 oil pump, TSP 1-7/8" long tube headers (W/Catless Off-road Pipes), Corsa Xtreme 3" Catback, GPI Ported/Rod Mod Intake, Stage 2 Ported Throttle Body, Vararam OTR CAI, Mike Norris Gen 2 catch can + GM 1LE clean side separator, 160º thermostat - Megan Racing adjustable coilovers (lowered 1.75"), MRR M017 10/11" wheels-Tuned by Ryan @ GPI

09-01-2024, 05:03 AM	#3
acutron42 Drives: 2013 Camaro 2SS AGM Join Date: Apr 2020 Location: WNY Posts: 957	InFiD3ViL is correct & here is a link to the part you need for a stock air box. I would not trust this mechanic. https://www.amazon.com/Genuine-GM-Tu.../dp/B00TAB330E __________________ 2013 2SS GPI built & tuned 415, spec'd by Andrew Cammer. GPI ported intake/tb/heads, Tooley springs, CHE trunnions, Callies rotating assembly, Diamond pistons, GPI SS3 VVT, ATI 10% ud damper, Circle D 3800, Kooks ceramic coated lt's with green cats, Mishimoto rad & oil cooler, Derale trans cooler, Holley efi rails. DSS driveshaft, trutrac with 3.91's, G-Force renegades, Hendrix solid cradle bushings Bmr: poly diff bushings, Strange adjustable coilovers, sub frame connectors, ZL1 npps, controlled with a vac pump & mac boost control solenoid. Last edited by acutron42; 09-01-2024 at 05:42 AM.

09-01-2024, 10:42 AM	#4
1JEWLDSSRS Drives: 2011 SS-RS Join Date: May 2011 Location: FLORIDA Posts: 14,034	As stated above, these guys are correct. That hose supplies fresh air into the crankcase for the PCV system. I would get it hooked back up. Easy fix. __________________ TSP STAGE 3 CAM,231/246 @112 LSA 614/641 LIFT, CIRCLE D 5C-4200-4500 CONVERTER,LOD INTAKE.CORSA EXHAUST. DSS 1 PC DS. PEGASUS SOLID CRADLE MOUNTS. 486RWHP/475RWTQ.LOTS MORE.