Middle Iron Corrosion

NoDOHC · 06-29-2011, 10:47 PM

The oil film should mostly fill that corrosion near the port, although it is a crying shame that you didn't get some WD40 or oil on the housing right away to prevent that from happening.

I would be most worried about the corrosion in the oil control ring region. It appears that you used some type of water-based solvent to clean the housings, as the corrosion seems to track a drip path.

Good center housings are about $50 on eBay typically. NA center housings are pretty common.

RETed · 06-30-2011, 05:01 AM

You can typically knock off this kinda of "surface rust" with some light oil and a fine grit sandpaper.
This should not affect compression in any way.
This is the good news.

The bad news is that Mazda gas-nitrides those surfaces for wear.
Rust will usually eat through this gas-nitride surface, causing accelerated wear on the housing.

-Ted

06-29-2011, 10:47 PM	#1
NoDOHC The quest for more torque Join Date: Sep 2008 Location: Sheboygan, Wisconsin Posts: 855 Rep Power: 17	The oil film should mostly fill that corrosion near the port, although it is a crying shame that you didn't get some WD40 or oil on the housing right away to prevent that from happening. I would be most worried about the corrosion in the oil control ring region. It appears that you used some type of water-based solvent to clean the housings, as the corrosion seems to track a drip path. Good center housings are about $50 on eBay typically. NA center housings are pretty common. __________________ 1986 GXL ('87 4-port NA - Haltech E8, LS2 Coils. Defined Autoworks Headers, Dual 2.5" Exhaust (Dual Superflow, dBX mufflers) 1991 Coupe (KYB AGX Shocks, Eibach lowering springs, RB exhaust, Stock and Automatic)