Rear main puking oil? - Page 3 - ZR-1 Net Registry Forums

Neat · 06-14-2020

Around those years, the rear covers on LS engines had a casting porosity issue, the oil would ocassionally wick through the aluminum rear cover. I have only encountered the issue on 2010 and 2011 Camaro's, but I don't know why the issue would be confined to F-bodies.

There is an updated part number from GM that comes with a new rear cover, with the rear main seal installed, and new bolts. The last one I bought was about $55 from the local dealer. Easy to install, a pain to get to. Good luck!

06-14-2020	#21
Neat Join Date: Apr 2018 Location: Raleigh, NC Posts: 40	Re: Rear main puking oil? Around those years, the rear covers on LS engines had a casting porosity issue, the oil would ocassionally wick through the aluminum rear cover. I have only encountered the issue on 2010 and 2011 Camaro's, but I don't know why the issue would be confined to F-bodies. There is an updated part number from GM that comes with a new rear cover, with the rear main seal installed, and new bolts. The last one I bought was about $55 from the local dealer. Easy to install, a pain to get to. Good luck! __________________ 1991 ZR-1 #769 - Turquoise / black - DRM 475 - 1993 Mustang - White / Black - Twin Turbos - Other Stuff - Last edited by Neat; 06-14-2020 at 08:25 AM. Reason: spelling