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Old 09-18-2015, 01:19 AM   #1
machoSS
 
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Oil leak

Hello ZL1 family,

So I did a few upgrades(CAI, 101mm throttle body, 1000cc injectors, flex fuel sensor, smaller blower pulley, tune, and run a 50/50 mix of e85/91) car made 600+ to the wheels but now it has a bad leak from crankcase pressure. It first started leaking through the main seal and we replaced that seal twice now. We removed the oem oil cap and added a breather to release some of the pressure so the main seal won't go bad again but now it's leaking oil from out of the breather and almost caused a fire from the oil leaking onto the headers. I have took it back to the shop 5 different times but we can't figure out the issue. Has anyone else had a similar issue? Thank you for your help.
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Old 09-18-2015, 11:16 AM   #2
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I would do a compression test on all cylinders as a next step.
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Old 09-18-2015, 01:15 PM   #3
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Quote:
Originally Posted by machoSS View Post
Hello ZL1 family,

So I did a few upgrades(CAI, 101mm throttle body, 1000cc injectors, flex fuel sensor, smaller blower pulley, tune, and run a 50/50 mix of e85/91) car made 600+ to the wheels but now it has a bad leak from crankcase pressure. It first started leaking through the main seal and we replaced that seal twice now. We removed the oem oil cap and added a breather to release some of the pressure so the main seal won't go bad again but now it's leaking oil from out of the breather and almost caused a fire from the oil leaking onto the headers. I have took it back to the shop 5 different times but we can't figure out the issue. Has anyone else had a similar issue? Thank you for your help.
Please post pictures or email them to us with your PCV System hose routing and we will diagnose and guide you.

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Old 09-18-2015, 05:22 PM   #4
machoSS
 
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Originally Posted by Elite Engineering View Post
Please post pictures or email them to us with your PCV System hose routing and we will diagnose and guide you.

ok thank you for your help, it is much appreciated, as soon as I get off of work today, I will take some pictures. I hope it's something simple
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Old 09-18-2015, 11:05 PM   #5
Red Jewel RS

 
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Originally Posted by Elite Engineering View Post
Please post pictures or email them to us with your PCV System hose routing and we will diagnose and guide you.

I think these guys are on it.
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Old 09-19-2015, 08:48 AM   #6
Emvici
 
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where can I find a breather cap to replace the oem one? that sounds like a great idea. what are they called? and how much can I expect to pay for one? thank you very much and best hopes to you machos in your repairs.
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Old 09-19-2015, 08:17 PM   #7
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catch can and breather should fix your issues
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'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)
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Old 09-19-2015, 08:18 PM   #8
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Smitty here had similar issues and resolved them with a catch can/breather setup
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'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)
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