Gouge in the cylinder wall....
11-19-2013, 09:37 PM
#1
Gouge in the cylinder wall.... Please take a look at these pics and tell me what you guys think. I bought the motor a while back ago and looked it over but not too closely apparently. Engine is a 408 and I am just concerned about it. It has some lines coming up the wall but they are not scratched. I ran a pick across them and it doesn't get caught on them. However that gouge does.
Will it live like this as an N/A motor. No nitrous just straight motor.
Will it live like this as an N/A motor. No nitrous just straight motor.
11-19-2013, 09:54 PM
#2
What's the history on the engine?
I had a similar gouge on one of my cylinder walls on my ls6 block.. I talked to some vendors and I got a mixed review of opinions..
Some said to just run it as is, others said to take it apart and hone out the wall .001 or less to see if it will clean up..
What's the piston to wall clearance?
I had a similar gouge on one of my cylinder walls on my ls6 block.. I talked to some vendors and I got a mixed review of opinions..
Some said to just run it as is, others said to take it apart and hone out the wall .001 or less to see if it will clean up..
What's the piston to wall clearance?
11-19-2013, 10:13 PM
#4
What's the history on the engine?
I had a similar gouge on one of my cylinder walls on my ls6 block.. I talked to some vendors and I got a mixed review of opinions..
Some said to just run it as is, others said to take it apart and hone out the wall .001 or less to see if it will clean up..
What's the piston to wall clearance?
I had a similar gouge on one of my cylinder walls on my ls6 block.. I talked to some vendors and I got a mixed review of opinions..
Some said to just run it as is, others said to take it apart and hone out the wall .001 or less to see if it will clean up..
What's the piston to wall clearance?
Well, I bought some 4.065 pistons. If I come to the conclusion that I shouldn't run it thus way then I'll tear the block down. I'll have it sonic tested and see if there is enough material to bore it out to a 4.065" bore and still be safe. It'll give me a 415ci. But again if it's "ok" to run then I'd run it. Just something to drag on the weekends. No nitrous.
Also, not sure on the piston to wall clearance. I bought it knowing it was a 408 and that was all I knew. It has diamond pistons, lunati 4" crank and forged rods.
11-21-2013, 02:59 AM
#7
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you can safely go .60 over but thats about it my friend.. anything past 60 over and your cylinder walls will heat up and crack because they will be paper thin.... go 60 over if you want to feel safe.. looks like you already have the motor out.... spend the couple bucks for the bore and let it rip
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11-21-2013, 05:56 AM
#8
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Looks more like a casting flaw, tiny bumps in the "gouge" look like sand marks on cast iron.
How far down the bore? If it were at or very near the top, I'd be a lot more concerned than if it were halfway down or more. The lower, the better - much less chance of losing compression.
How far down the bore? If it were at or very near the top, I'd be a lot more concerned than if it were halfway down or more. The lower, the better - much less chance of losing compression.
11-21-2013, 07:15 AM
#9
At minimum, you'll need to pull the piston for a good inspection-doing all of them is prudent.
If you're REALLY lucky, you might be able to clean it up with a dingleberry hone. If not, go to +.040.
Last edited by Paul Bell; 11-21-2013 at 09:07 AM.
