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03-18-2019, 07:36 PM
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#1 |
 Drives: 2011 Camaro 1LT Join Date: Mar 2019
Location: Denver
Posts: 4
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2011 3.6L engine noise.
Hey everyone;
New user here and first post. I have a 2011 3.6l I just bought and it has the worst sound. I can't seem to track down where it is coming from. Sounds like a lifter tick but might be a bad rod bearing. Im sure it is isolated to cylinder 3. If you start it up and unplug #3 coil the sound usually goes away almost completely. Any thoughts, advice or suggestions before I teardown the engine completely. 
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03-18-2019, 07:55 PM
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#2 |
       Drives: 2015 2SS/RS Join Date: Apr 2012
Location: Southeast Louisiana
Posts: 2,112
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Doesn't explain why it goes away when unplugging the coil but the V6 in these cars has a high pressure fuel pump that I believe is mounted in the rear of the driver side cylinder head and it makes one hell of a tick because its generating over/around a thousand pounds of fuel pressure. It is driven off the camshaft. I noticed it pretty readily on my 2012 V6 I had.
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2015 Camaro 2SS/RS SIM
2016 Jeep Wrangler 2DR Willys Wheeler 1993 C1500 Single Cab Stepside 5.3L LS Swap |
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03-18-2019, 08:39 PM
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#3 |
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Those who need me got me
Drives: 2022 ZL1 A10 Join Date: Aug 2017
Location: Southwest, MN
Posts: 624
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check it in the dark and look for any sign of an arc..
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03-18-2019, 11:25 PM
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#4 |
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Drives: 2011 Camaro 1LT Join Date: Mar 2019
Location: Denver
Posts: 4
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What would that show me? It really sounds mechanical but I havent worked on an engine this advanced.
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03-18-2019, 11:27 PM
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#5 |
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Drives: 2011 Camaro 1LT Join Date: Mar 2019
Location: Denver
Posts: 4
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I have read alot about the fuel pumps and injectors being noisy. This is extremely loud and audible inside over the radio. I wish I could post the video I made.
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03-19-2019, 04:47 PM
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#6 |
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Account Suspended
Drives: Camaro V6 Join Date: Oct 2016
Location: U.S.
Posts: 1,722
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Replace the coil on that cylinder and see if it goes away. Maybe the coil is going bad or something.
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03-19-2019, 10:57 PM
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#7 |
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Drives: 2011 Camaro 1LT Join Date: Mar 2019
Location: Denver
Posts: 4
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Update
Well guys thanks for all the replies and tips, unfortunately we pretty much just confirmed the worst case scenario, it has a rod knock. However I have been doing some research and while I will be rebuilding that engine I will also be doing a few performance upgrades. Had a few people me I should l99 or LS3 swap it but it seems like that isnt very easy or cost effective so performance V6 it is.
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03-19-2019, 11:13 PM
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#8 |
  
Drives: 2010 RS Inferno Orange Metallic Join Date: Mar 2010
Location: Albany, Ga.
Posts: 3,474
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me too
blown head gasket, going to do some mods
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| Tags |
| 3.6l v6, knocking, lifter noise, rebuild |
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