Cylinder scratches
#2613126
01/27/19 06:19 PM
01/27/19 06:19 PM
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69cornetr/t
Unregistered
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69cornetr/t
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Well I have my opinion but I want to hear from people that know. Check out these scratches tell me what made them they are in all cylinders but this one caught my eye that alerted me to the rest. There is brown in the scratches, kinda of a mixture of nasty oil condensation and rust but it wipes off. The engine has been sitting awhile. Now, I can't hardly feel them with my fingernail, but I can with my finger.
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Re: Cylinder scratches
[Re: ]
#2613137
01/27/19 06:36 PM
01/27/19 06:36 PM
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Joined: Sep 2014
Posts: 4,457 Washington
madscientist
master
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master
Joined: Sep 2014
Posts: 4,457
Washington
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Pull it apart, clean it, dingle berry hone it (lightly) and run it. Measure the clearances and make sure the are correct while you're in there.
Just because you think it won't make it true. Horsepower is KING. To dispute this is stupid. C. Alston
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Re: Cylinder scratches
[Re: ]
#2613153
01/27/19 07:09 PM
01/27/19 07:09 PM
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69cornetr/t
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69cornetr/t
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Ya kinda confirms what I was thinking.
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Re: Cylinder scratches
[Re: Porter67]
#2613155
01/27/19 07:13 PM
01/27/19 07:13 PM
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69cornetr/t
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69cornetr/t
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Pretty good eye you are correct on the pistons
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Re: Cylinder scratches
[Re: ]
#2613159
01/27/19 07:18 PM
01/27/19 07:18 PM
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69cornetr/t
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69cornetr/t
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Really think it's necessary to tear down and rehone and regap? It's got a 1000 miles on it,but they are quarter mIle hard miles nothing above 6000. In my mind I probably should but I just wanted to avoid that.I need to hear some nonbiased opinions
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Re: Cylinder scratches
[Re: ]
#2613171
01/27/19 08:12 PM
01/27/19 08:12 PM
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Joined: Jan 2003
Posts: 15,439 Val-haul-ass... eventually
BradH
Taking time off to work on my car
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Taking time off to work on my car
Joined: Jan 2003
Posts: 15,439
Val-haul-ass... eventually
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Really think it's necessary to tear down and rehone and regap? ... In my mind I probably should but I just wanted to avoid that.I need to hear some nonbiased opinions Non-biased opinion: It's ugly in there and should be torn down and dealt with. However, that's obviously not the answer you want to hear.
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Re: Cylinder scratches
[Re: Porter67]
#2613190
01/27/19 08:45 PM
01/27/19 08:45 PM
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Joined: Aug 2003
Posts: 43,719 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,719
Bend,OR USA
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Look like old grey forged trw-s or such, id have to guess your .005 isnt enough, more like .008-.009 or better. Those skirts are not like the newer TRW and speed Pro forged 440 pistons, they looklike the original forged 426 M.W TRW pistons Did you gap the rings and deburr the ring ends? If not you should have If you did then those scratches maybe from junk suck into the cylinders and got stuck between the top of the pistons above the ring lands and cylinder walls
Last edited by Cab_Burge; 01/27/19 08:46 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Cylinder scratches
[Re: Porter67]
#2613253
01/27/19 10:58 PM
01/27/19 10:58 PM
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69cornetr/t
Unregistered
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69cornetr/t
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It's 68 440 I built it in the 80s, used trw pistons,l and used a ring filer and checked the gap inside a fresh bored 030 block. But the did sit a couple years at a time. I used to run it at the track. Damn good motor ran 12s in a challenger. Was just going to swap it to another car thought I'd take peek inside.Ring gap was dead nuts on when I put it together.chrome moly
Last edited by 69cornetr/t; 01/27/19 11:18 PM.
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Re: Cylinder scratches
[Re: ]
#2613278
01/27/19 11:45 PM
01/27/19 11:45 PM
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Joined: Jan 2003
Posts: 18,024 S.E. Michigan
ZIPPY
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 18,024
S.E. Michigan
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Damn good motor ran 12s in a challenger. I've always thought it was pretty amazing how imperfect things can be and still function admitably well for what they are. Myself I would hand hone or machine shop touch hone and re ring it, but.....If you don't, it will be just as good as it was. I'm more inclined to repair and improve things while they are apart.
Rich H.
Esse Quam Videri
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Re: Cylinder scratches
[Re: ]
#2613402
01/28/19 09:50 AM
01/28/19 09:50 AM
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69cornetr/t
Unregistered
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69cornetr/t
Unregistered
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20 50 @ 180 degrees , but it's a street engine now . I'll take the heads off and get a better look. But most likely i will take it apart and fix it right because it will always bug the [censored] out of me if don't . I'll see what my machinist says first.
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Re: Cylinder scratches
[Re: dvw]
#2613425
01/28/19 11:03 AM
01/28/19 11:03 AM
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69cornetr/t
Unregistered
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69cornetr/t
Unregistered
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True Doug you make a good point
Last edited by 69cornetr/t; 01/28/19 11:04 AM.
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Re: Cylinder scratches
[Re: ]
#2613426
01/28/19 11:10 AM
01/28/19 11:10 AM
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69cornetr/t
Unregistered
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69cornetr/t
Unregistered
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I'll take the heads off go from there and throw some trick flows on it and beat on it some more, and have fun, that's what it's all about for me
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