ZR-1 Net Registry Forums - View Single Post - A tuning tale: BLMs say lean, plugs say rich

XfireZ51 · 11-12-2018

Pulled both IHs to discover some oil seepage, like ccmano, from PCV vents into cylinders. I did not realize that only two of the three apparent vents are functional on the cylinder heads. These pics are of both sides IH. The first being right side, but left side also showing some seepage. We see seepage into middle cylinders on each cylinder head. I also show the #6 cylinder plug as it correlates to the seepage we see on the Ih gaskets.

11-12-2018	#21
XfireZ51 Join Date: May 2007 Location: Chicagoland, IL Posts: 9,686	Re: A tuning tale: BLMs say lean, plugs say rich Pulled both IHs to discover some oil seepage, like ccmano, from PCV vents into cylinders. I did not realize that only two of the three apparent vents are functional on the cylinder heads. These pics are of both sides IH. The first being right side, but left side also showing some seepage. We see seepage into middle cylinders on each cylinder head. I also show the #6 cylinder plug as it correlates to the seepage we see on the Ih gaskets. Last edited by XfireZ51; 03-08-2024 at 02:09 PM.