SMALL RUST SPOT IN CYLINDER, WHAT TO DO??
#1
SMALL RUST SPOT IN CYLINDER, WHAT TO DO??
Got the heads pulled off a motor I'm working on. Everything looked good until I found a little spot of surface rust in one cylinder about the size of a q-tip head. Was just at the top of the piston ring travel. Sprayed some wd40 on a rag and rubbed it off. Should I be worried about it?? Motor spins freely, and didn't see any score marks in the cylinder. I'll take a flashlight to it in the morning tho for a better look. I do not wanna do a full motor build for this truck, but I also don't want any issues a year or 2 down the road after doing all this work.
#2
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Re: SMALL RUST SPOT IN CYLINDER, WHAT TO DO??
If it's above the ring, why would it matter, if it's below the ring it'll probably scrape it clean most rikki-tik the first time you crank the engine. If you're worried about it, little 600 grit wet or dry, lubed with WD40 would probably buff it off. Unless it's pitted, can you catch a fingernail on it? If it's that bad, hone or bore + hone, but when you say it's one spot, very small, and surface rust, and it rubbed off, its probably nothing to worry about.
Disclaimer: Kansas hayseed speaking, never had a minutes training in an engine building shop, so
Disclaimer: Kansas hayseed speaking, never had a minutes training in an engine building shop, so
#3
Re: SMALL RUST SPOT IN CYLINDER, WHAT TO DO??
If it's above the ring, why would it matter, if it's below the ring it'll probably scrape it clean most rikki-tik the first time you crank the engine. If you're worried about it, little 600 grit wet or dry, lubed with WD40 would probably buff it off. Unless it's pitted, can you catch a fingernail on it? If it's that bad, hone or bore + hone, but when you say it's one spot, very small, and surface rust, and it rubbed off, its probably nothing to worry about.
Disclaimer: Kansas hayseed speaking, never had a minutes training in an engine building shop, so
Disclaimer: Kansas hayseed speaking, never had a minutes training in an engine building shop, so
#4
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Car: 84 TA orig. 305 LG4 "H" E4ME
Engine: 334 SBC - stroked 305 M4ME Q-Jet
Transmission: upgraded 700R4 3200 stall
Axle/Gears: 10bolt 4.10 Posi w Lakewood TA Bars
Re: SMALL RUST SPOT IN CYLINDER, WHAT TO DO??
What Drew said - not a problem.
#6
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Car: 84 TA orig. 305 LG4 "H" E4ME
Engine: 334 SBC - stroked 305 M4ME Q-Jet
Transmission: upgraded 700R4 3200 stall
Axle/Gears: 10bolt 4.10 Posi w Lakewood TA Bars
Re: SMALL RUST SPOT IN CYLINDER, WHAT TO DO??
Use scotchbrite and WD-40.
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#9
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Car: 84 TA orig. 305 LG4 "H" E4ME
Engine: 334 SBC - stroked 305 M4ME Q-Jet
Transmission: upgraded 700R4 3200 stall
Axle/Gears: 10bolt 4.10 Posi w Lakewood TA Bars
Re: SMALL RUST SPOT IN CYLINDER, WHAT TO DO??
#10
Re: SMALL RUST SPOT IN CYLINDER, WHAT TO DO??
I guess I can get the piston about halfway down and use masking tape to cover the bore. Just FYI, if this was a small block Chevy I was working on then no, I wouldn't be concerned at all cause they're so cheap to rebuild. Only reason I even care is cause it's(and to the moderators please don't close this thread because of this) is it's a duramax going into a truck I'm not even sure I'm gonna keep. Not gonna go crazy with it, but planning on more power than stock
#11
Member
Re: SMALL RUST SPOT IN CYLINDER, WHAT TO DO??
It's just surface rust, nothin to be scared about just clean it up and put it together as long as all the other bored are clean. RUST NEVER SLEEPS
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