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02-11-2019, 11:14 AM
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#1 |
 
Drives: 2010 Orange 2SS/RS Join Date: May 2010
Location: West Palm Beach, fl
Posts: 376
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Cylinder 7 misfire, head work vs new head kit
Hello everyone,
I have an issue where cylinder 7 misfires and all stabilitrak goes off. It goes off and on the entire time driving so not permanently. The dealership said the only issue they found with all their tests was it had good compression but bad running compression (Whatever that means). Said most likely it is a bad valve guide and they want to charge me 1800 for a bunch of gaskets and valve work I would assume. My thought was, instead of paying for this to get "Fixed" would it be better to just swap in new performance heads? |
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02-11-2019, 11:27 AM
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#2 |
  Drives: 2011 convertible 2ss/rs Join Date: Sep 2015
Location: Houston
Posts: 971
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Or just take the head off and replace the valve and a stock. Gasket back on and done
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02-11-2019, 11:43 AM
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#3 |
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Drives: 2010 Orange 2SS/RS Join Date: May 2010
Location: West Palm Beach, fl
Posts: 376
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How complex is removing the heads? If it isn't something I need a shop for and can dfo it in my garage I can probably make it happen I guess
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02-11-2019, 11:51 AM
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#4 |
        
Drives: '15 SS 1LE, '69 Z28 drag car Join Date: Dec 2009
Location: Mich
Posts: 4,483
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Running compression takes in account the valvetrain. Things like a lifter or bad valve spring can cause it to have bad running compression. Standard repair would be to recondition the heads, valve job, new lifters... inspect cam lobes.
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02-11-2019, 07:07 PM
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#5 |
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Drives: 2010 Camaro 2SS Victory Red 6M Join Date: Apr 2015
Location: Gulf Coast, TX
Posts: 1,424
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If it's 1800 then yes it woukd be smarter to pull them both and either send them off to be R&R and ported or just swap them for a set already worked over. You could sell those for an easy 350 to 400 as is and be done with it.
__________________
2011 2SS 6A Red Jewel Metallic, Vararam Tune CAI, Magnaflow 3" Competition c/b, Speed Engineering 1-7/8 LT's, Circle D 5C, M/T 275/40R20 S/S, HPTuners tune by Ryan@GPI
12.3 @ 112 ACM as of 12/22/19 Gone on 12/28/19 R I P 2010 2SS 6M Victory Red/Black (old ride) CAI intake, Speed Engineering 1 7/8" LT's, X4 base tune, Flowmaster Outlaw axle-back. 12.6 @ 115 SAR as of 9/19/15 Gone but never forgotten. |
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02-11-2019, 07:25 PM
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#6 |
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Drives: 2011 convertible 2ss/rs Join Date: Sep 2015
Location: Houston
Posts: 971
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Yup between 10 to 14 bolts cant remember but yeah do it in ur garage and throw them bolts away, go to dealership and get more or order a set of arp bolts and a good torque wrench, one from sears will do
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02-11-2019, 09:14 PM
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#7 |
Drives: 13' 1LE Join Date: Apr 2012
Location: Canada
Posts: 2,641
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Swap for CNC GMPP LS3. Sell your old heads after inspection/repair or as is.
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13' 1LE
Old setup: TSP 231-236/Tick 660/.105 PR, UDP, SW LT 2'' & HFC, stock NPP & H pipe, VR-DRX CAI, air scoop, Goertz1 manifold, 102mm BBK, 26" Toyo DRs, Forgestars R17x10 & F18x8, rear seat delete, remote Pat G tune Autocal, 7400 limiter, Spec Mini Twin. 91oct. 11.90@122.3, 0-60ft 2.0 / 11.99@123.6, 0-60ft 2.1 DA+819 ...519RWHP SAE Solid roller SBE LS3, FED, LLSR, 91oct, 605rwhp N/A. Tuned by Pat G. Build by me. |
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02-12-2019, 07:51 AM
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#8 |
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Drives: 2010 Orange 2SS/RS Join Date: May 2010
Location: West Palm Beach, fl
Posts: 376
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Perfect thanks gentlemen! I figured there were better options out there. I will swap out the heads! I have a Comp Cam in the car now, with the new heads will the tune need to be adjusted? Guessing not needed but optimal
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02-12-2019, 04:28 PM
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#9 |
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Drives: 2015 Camaro SS 1LE Join Date: Feb 2017
Location: Miami
Posts: 353
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You will need a retune
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