gzig5
Well-Known Member
That's thinking out of the box. I like it. Should be able to balance that small amount of aluminum out.
Will this bore clean up, magnum head content too.
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autoxcuda
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nice thinking out of the box like said…
…But that’s not cleaning up with .010 more bore.
I very doubt it will clean up with .060 (.030 more.
cookietruck
Well-Known Member
i'm about to try to knock the raised portions off the wall and see how corroded it is. i do see where it looks pitted abought .250" below the deck, i'm guessing it's been leaking a long time and rings always knocked it off lower in the bore.
about to the pull the other head too, crossing fingers they all look good.
cookietruck
Well-Known Member
one thought was getting some .040 over Mahle pistons and selling these H116CP pistons. But that gets me into a sleeve AND bore and hone on the block. At that point it might make more sense financially to use a different block.
autoxcuda
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Wait… so a piston has been sliding over that nasty spot down in the bore?
… so that’s all “inny” corrosion? Not “outty” ?
sccachallenger
Well-Known Member
Like this idea, hope you won't have to buy two complete sets of rings!
And you're telling us this cylinder had 185-190psi of compression? I'd leave it like it is.
HankRearden
Well-Known Member
GM built engines that way. Different bores and different diameter crank journals. the manuals mentioned that when I was working at a GM dealer back in the day.
replicaracer43
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Where are you located?
x2 I have a 360 mag here with aluminum eldebrock heads I would let go.
Its standard bore with KB pistons.
Its standard bore with KB pistons.
cookietruck
Well-Known Member
almost all is outty corrosion. I scraped it with a soft metal that was cut clean. Then more scotchbrite. Looks better but still really bad. The worst part is up at the top. You can see the bad corrosion.
cookietruck
Well-Known Member
central texas. So far away from everywhere!!
Dingle hone. LOL
I'll get some hate, but I'd run it. It'll kinda clean itself up to a point.
No hate here, you are right. A ball hone if possible and let her rip. No it is not perfect, but should get a few more years out of it.
I would at the very least take that piston out, clean it up, and make sure the rings aren't stuck.
mygasser
Well-Known Member
it looks like a 40 over piston would be just fine in that 1 bore now. or as rrr says hone and go as is, it'll be fine for a lot of miles yet.
neil.
neil.
cookietruck
Well-Known Member
Thanks guys.
One other bore gas a bit of corrosion. Not as bid as the first we were talking about.
One other bore gas a bit of corrosion. Not as bid as the first we were talking about.
cookietruck
Well-Known Member
Looks like the gaskets caused this.
so pretty confident my magnum heads are fine, i was told they were new castings with thicker decks and all that stuff. I have no idea what castings they are though. The intake manifold is a ProComp which you can't even get anymore so this is an old rebuild. Pistons look close to zero deck and I was told the cam is a purpleshaft with maybe .455 lift (but that's the big block cam lift, not the small block) so I gotta measure that too.
I kinda want to get this fixed good enough so it doesn't smoke at all and will last a good while in a powerwagon I use for hauling **** and misc work truck stuff. So pretty much everything in the motor as is would be good to go in the truck.
so pretty confident my magnum heads are fine, i was told they were new castings with thicker decks and all that stuff. I have no idea what castings they are though. The intake manifold is a ProComp which you can't even get anymore so this is an old rebuild. Pistons look close to zero deck and I was told the cam is a purpleshaft with maybe .455 lift (but that's the big block cam lift, not the small block) so I gotta measure that too.
I kinda want to get this fixed good enough so it doesn't smoke at all and will last a good while in a powerwagon I use for hauling **** and misc work truck stuff. So pretty much everything in the motor as is would be good to go in the truck.
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cookietruck
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btw, the used and abused 8553PT gasket thickness is right at .050" on the fire rings. I think if I use 8553PT again I might spray them with something to help seal. Don't want these ******* leaks again...
pistons must be close to zero deck to be pumping 185-190psi 4 years ago (that was cold too). magnum chamber, i'm guessing it's the Mopar Purple cam 268/272- .450/.455 lift.
pistons must be close to zero deck to be pumping 185-190psi 4 years ago (that was cold too). magnum chamber, i'm guessing it's the Mopar Purple cam 268/272- .450/.455 lift.
replicaracer43
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A zero deck piston, a closed chamber head, is probably not gonna be very happy in a truck situation
cookietruck
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4.10 gears and 34" tire. It doesn't lug. cruises about 2700rpm
mopowers
Well-Known Member
Not sure where you're located, but if I were you, I'd wait for a half off day at Pick-n-Pull and grab a 'new' 5.9. Every time I go, there are plenty to choose from and on half off weekends, you can pick up a long block for ~$100. Most likely, it'll still have a crosshatch and be useable as-is.
That block you've got isn't worth the headache IMO, when replacements are so readily available and cheap.
Dartnut
Don't hate me because i'm beautiful
I would clean it up and run it as is.
I've seen a lot of scarier **** cleaned up and run without any problems.
I realize that there is a ''right'' way to do things and a ''good enough'' way to do things.
For your intended use, the ''good enough'' way would be good enough.
Clean it up and regasket it, but check the head and deck surfaces for straightness and correct if necessary.
The head gaskets failed for some reason.
JMHO...........
I've seen a lot of scarier **** cleaned up and run without any problems.
I realize that there is a ''right'' way to do things and a ''good enough'' way to do things.
For your intended use, the ''good enough'' way would be good enough.
Clean it up and regasket it, but check the head and deck surfaces for straightness and correct if necessary.
The head gaskets failed for some reason.
JMHO...........
Right! What do people think when one sits up a while? That the cylinders are somehow protected? Naw, ain't happenin. lol Might not as bad as what he has here, but before I spent big money on it boring and sleeving, I'd try it.
pishta
I know I'm right....
Dingle ball hone it until its cleaned up and then measure it. Hopefully itll be ~.032 over and clean enough to not catch a finger nail. Dont worry about the crap over the ring lands. Ball hones wont take much but itll help your to take the edge off anything left. Imagine what a 30 year old barn find cylinder looks like and guys start them up all the time with fresh gas and topping the oil off.
cookietruck
Well-Known Member
AHA, figures, the cheapest magnum castings have the floor vane in the port.
New Magnum heads for 347 with Flow data
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