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Cylinder Wall Damage?

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Old Sep 22, 2005 | 05:14 PM
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Default Cylinder Wall Damage?

Please look at these pictures and tell me if my cylinder walls look OK? The hone marks are visible but what about the vertical "scratches"? What could cause this to happen?

http://i11.photobucket.com/albums/a1...inderWall1.jpg
http://i11.photobucket.com/albums/a1...inderWall2.jpg
http://i11.photobucket.com/albums/a1...inderWall4.jpg
http://i11.photobucket.com/albums/a1...inderWall5.jpg
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Old Sep 22, 2005 | 05:40 PM
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I would assume it would come from the rings. What was the wall to piston clearance around the skirts? May want to pull a piston and check the rings.
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Old Sep 22, 2005 | 05:59 PM
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How many miles are on the engine?
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Old Sep 22, 2005 | 06:08 PM
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looks like a little scuffing, but it's hard to tell from just pics how deep the marks are. but, if i were to guess, i'd say you will be ok.
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Old Sep 22, 2005 | 07:08 PM
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Originally Posted by strokedls1
I would assume it would come from the rings. What was the wall to piston clearance around the skirts? May want to pull a piston and check the rings.
I'm not sure what the wall to piston is.

Originally Posted by RICRH8R
How many miles are on the engine?
Fairly new forged motor with aprox. 5k miles on it.

Originally Posted by Grimes
looks like a little scuffing, but it's hard to tell from just pics how deep the marks are. but, if i were to guess, i'd say you will be ok.
If I run my hand around the cylinder you can feel where the marks are...
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Old Sep 22, 2005 | 07:42 PM
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If the car is performing well and you don't have any performance related issues, just run it.
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Old Sep 22, 2005 | 09:23 PM
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I would say it is ok I have a older SBC that is the same way and it has a lot of piston to wall clearence. I think what causes that is the sides of piston, it also had the same markes on the pistons , the scratches on ours you could catch a nail on but still turns 9k like no tommorrow,
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Old Sep 22, 2005 | 09:57 PM
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Looks pretty normal for a race engine. Remember when you are at WOT there is a lot of side load on the piston whenever the crank is past TDC.
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Old Sep 23, 2005 | 07:41 PM
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That doesn't look that bad at all really.
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Old Sep 26, 2005 | 10:34 AM
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Thanks for the input.
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Old Sep 26, 2005 | 10:46 AM
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good post.

I've had less scuffing than that, almost none, on a 50k mile 383 stroker that was BEAT ON, BUT my 408 with 500 miles has some scuffing already. was wondering if it was a problem, guess not.
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