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Hey guys, I purchased a used lq9 long block, and started disassembly on it last night. Upon removing the heads there was a little water that had sat in a couple cylinders for probably a week or two, I'd assume from the wrecking yard cleaning the motor off. Anyway I wiped the water off and noticed it hadn't really rusted, but more or less "stained" the walls. Running my finger across the walls I can feel in those areas where is definately not as smooth as the rest of the cylinder. The motor turns over freely though with no hesitations.
My goal with this motor was to throw 243s on it, slap and cam in and run it as is. It's not a performance oriented build, just want a little more pep when getting on the freeway in this little single cab truck. Something I should be worried about?
Here's a couple pictures. Cylinder 2 farther down in the hole, has a larger patch of the stain where the water was pooled up I just didn't have a picture of that.
Coat it (not soak it) in automatic transmission fluid and let it sit. Dexron has a lot of detergent and metal conditions in it, so most if not all the stain will rub-out or disappear.
Soaked in trans fluid all night, still on there. I'm just going to put the motor together slap a starter on and check the compression to see if it's causing any issues with compression.
I wish I had a picture of the lower portion of the wall. That's what I'm more worried about. It's like a 1"X1" stain similar in color as the top spots.
few hundred miles of normal wear and tear plus a re-freshen oil change and they'll be gone.....
On the Hack-ometer scale of one to a hundred....this is about a six..
09-24-2017, 12:32 PM
Lq9 cylinder walls "stained" from water 
