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Old 02-26-2004, 04:16 PM
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Rust on cylinder walls! Is this a big Problem?!

Hello,

I have a sbc 350 bored .030. I have not been able to drive for awhile so I took my heads off my motor, and was going to put new ones on but ran out of money so I have been saving. I took the heads off in september and there has not been any on it and has not been ran since. It has been sitting for a couple of months since I lasted messed around with the motor. I had put oil in the cylinders to help it from not rusting. Well I went out to go check my deck height, and I was putting it on top dead center and I noticed it was alittle bit harder to turn then normal. So i looked to see what was wrong, and on the high side of the cylinder wall there was surface rust not on all of it, it had been where the oil had no stayed on the cylinder wall. Is this something to be alarmed at or should I not panic too much? What should I do about this? I'm really nervous, but stuff happens. Any information would be a great help!

thanks a ton

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Old 02-26-2004, 04:47 PM
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In that short time, I do not see how this could be any thing that could not be polished right up. I would first use some steel wool, which should clean it right up. If not, then I would hone it.

Trees
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Old 02-26-2004, 05:05 PM
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Do I have do take my pistons, rods etc. out if I do that, with the steel wool, and exspecially if I have to hone it?

Thanks
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Old 02-26-2004, 05:18 PM
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Quote:
Originally posted by sb72elcamino350
Do I have do take my pistons, rods etc. out if I do that, with the steel wool, and exspecially if I have to hone it?

Thanks
Yep...how would you get the whole cylinder otherwise?
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Old 02-26-2004, 05:37 PM
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Try soaking with Marvel Mystery Oil or Kroll oil on the walls for a few days to let it penetrate, and maybe free up any frozen rings.
If your turning the motor over with rust and crud you have a very good chance of scoring up the rings and scratching the walls.
It should be dissembled and the crank taken out so you can move the pistons up or down to clean first before rotating any moving parts over. Good time to check the complete motor over.
If not it will cost more in the long run. LOL
trees has a very good question, how bad is the rust?
Have you pulled the oil pan off and look at the walls below the pistons?
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Old 02-26-2004, 05:38 PM
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Move that piston to the bottom of it's stroke and scuff off the corrosion with a scotchbrite pad, try to catch all the particles with a rag stuffed into the bore and wipe it down after your done. Once the bore is clean and lubricated move the piston to the top of it's stroke and vacuum out the space between the top ring and the piston, use a feeler gauge to get into the narrow space to work the dirt out.

Any particles trapped in this space will not come on their own and will cause scratches on the bore, move the piston up and down in the bore to make sure nothing is left...wipe in between each stroke with a clean white rag soaked in clear mineral oil until nothing comes off the bore face. When you don't get dirt on the rag it's done.

It is important it is absolutely clean because anything trapped in the ring land space will only carburize and get stuck and possibly trap the ring or scuff the cylinder wall.
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Old 02-26-2004, 05:43 PM
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I think it would be the best benifit to take the motor apart. Its impossible to remove all the tiny particles from the piston rings and piston. Do it right the first time. .3 1/3 cents worth
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Old 02-26-2004, 05:51 PM
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Theres this Oldsmobille Dynamic88 I want, with the heads off,
and has rust in the cylinders, I was thinking I could clean it up dry
then take the shop vac to it to get it all out.
I don't see any reason why that wouldn't work.
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Old 02-26-2004, 06:52 PM
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Let us know how many miles you drive it when it starts to smoke.
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Old 02-26-2004, 07:02 PM
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I've never seen a engine smoke because the ring seal was bad.
an engine smokes because of bad valve seals.
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Old 02-26-2004, 07:08 PM
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I've seen lots of cylinder walls with flash rust on them, If you clean them like Chuck says they should be all right. If they are pitted then you will have to take it apart to clean it up. You should be able to tell if the rust is miner or not.

When you don;t drive or run a car for very long periods of time, any cylinders with the valve open will get a small amount of condensation on the walls and rust. as soon as you fire the engine the rings take it out.

Troy
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Old 02-26-2004, 07:11 PM
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disassemble...
Whoa...How weird and fitting...I just got on here to spell check disassemble...I didn't know if it was dis or diss....
How fitting the word I was checking is also your answer......

Hey Fastchevy...we were all new to the game at one point or another...just keep messing around with cars...eventually you'll see an engine smoke because of bad rings....
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Old 02-26-2004, 07:19 PM
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Quote:
Originally posted by Sandflea427SS
disassemble...
Whoa...How weird and fitting...I just got on here to spell check disassemble...I didn't know if it was dis or diss....
How fitting the word I was checking is also your answer......

Hey Fastchevy...we were all new to the game at one point or another...just keep messing around with cars...eventually you'll see an engine smoke because of bad rings....
Yea rust pits are bad.


Uh, how many cars have you owned Sandflea?
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Old 02-26-2004, 07:30 PM
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Quote:
Originally posted by FASTCHEVY
I've never seen a engine smoke because the ring seal was bad.
an engine smokes because of bad valve seals.
Gimme a break.
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Old 02-26-2004, 07:31 PM
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