Re: Any problem boring 060" over?
[Re: Noah Zarq]
#2229186
01/07/17 10:21 AM
01/07/17 10:21 AM
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Joined: Oct 2003
Posts: 21,345 Marysville, O-H-I-O
70Cuda383
Too Many Posts
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Too Many Posts
Joined: Oct 2003
Posts: 21,345
Marysville, O-H-I-O
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Sleeves are ~$100 per hole. Don't be afraid of them. The final result is actually stronger than original casting
On the flip side, it's only a 5.9 magnum block that can be found for around $150 as a bare block or $250 as a full engine if you shop around n haggle
Last edited by 70Cuda383; 01/07/17 10:23 AM.
**Photobucket sucks**
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Re: Any problem boring 060" over?
[Re: Noah Zarq]
#2229201
01/07/17 11:20 AM
01/07/17 11:20 AM
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Joined: Feb 2005
Posts: 28,312 Cincinnati, Ohio
Challenger 1
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Too Many Posts
Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
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I just bought a 360 off Craigslist. He sold it as a 318 (he's an import guy so he didn't know what he had) but once I scrubbed the dirt off the block I discovered it is a 1990 360 with a roller cam, that was run off propane. After opening it up I discovered it had been rebuilt at least once (as evidenced by the .040" Sealed Power pistons). All of the cylinders have a slight ridge at the top of the bores, barely enough to catch a fingernail, but one cylinder has a half inch long horizontal scratch that's deep enough to catch a fingernail. I also found the cause of the scratch, a piece of oil ring was in the oil pan. Since I'm looking at having it bored to the next size, is it really safe to go 060" over? I've heard these were thin walled and would run hot but I don't know.
I'm not looking for a street/strip warrior, just a daily driver engine to replace the aged slant six in my 84 D100. I'd return it because it is not what was advertised and look for another one. IMO a 5.9 is not worth putting sleeves in. Nothing wrong with a 318 either IMO. .060 over in not a good thing to do with any mopar block.
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Re: Any problem boring 060" over?
[Re: Challenger 1]
#2229329
01/07/17 02:25 PM
01/07/17 02:25 PM
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Joined: Jan 2004
Posts: 8,302 fredericksburg,va
cudaman1969
master
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master
Joined: Jan 2004
Posts: 8,302
fredericksburg,va
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I just bought a 360 off Craigslist. He sold it as a 318 (he's an import guy so he didn't know what he had) but once I scrubbed the dirt off the block I discovered it is a 1990 360 with a roller cam, that was run off propane. After opening it up I discovered it had been rebuilt at least once (as evidenced by the .040" Sealed Power pistons). All of the cylinders have a slight ridge at the top of the bores, barely enough to catch a fingernail, but one cylinder has a half inch long horizontal scratch that's deep enough to catch a fingernail. I also found the cause of the scratch, a piece of oil ring was in the oil pan. Since I'm looking at having it bored to the next size, is it really safe to go 060" over? I've heard these were thin walled and would run hot but I don't know.
I'm not looking for a street/strip warrior, just a daily driver engine to replace the aged slant six in my 84 D100. I'd return it because it is not what was advertised and look for another one. IMO a 5.9 is not worth putting sleeves in. Nothing wrong with a 318 either IMO. .060 over in not a good thing to do with any mopar block. I agree, hope you got it free. If you can't return it, sleeve it, hone the others then new rings. Finding another engine might put you in the same boat as now, crap shoot. Most all will need something done to it. Best bet is to find one running, hear it run for a least 20 minutes.
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Re: Any problem boring 060" over?
[Re: Noah Zarq]
#2229671
01/07/17 08:51 PM
01/07/17 08:51 PM
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Joined: Jan 2003
Posts: 25,899 Rio Linda, CA
John_Kunkel
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Posts: 25,899
Rio Linda, CA
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I'm not looking for a street/strip warrior, just a daily driver engine to replace the aged slant six in my 84 D100. Scuff up the bores and put a ring/bearing/gasket kit in it. Might use a little more oil than a full rebuild but oil's cheaper than machine work.
The INTERNET, the MISinformation superhighway
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Re: Any problem boring 060" over?
[Re: Noah Zarq]
#2229819
01/08/17 12:01 AM
01/08/17 12:01 AM
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Joined: May 2003
Posts: 6,566 Downtown Roebuck Ont
Twostick
Still wishing...
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Still wishing...
Joined: May 2003
Posts: 6,566
Downtown Roebuck Ont
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A show of hands. How many people here have actually seen a .060" over cylinder fail in a stock type build in ANY Mopar block? Thought so. Kevin
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Re: Any problem boring 060" over?
[Re: Twostick]
#2229913
01/08/17 10:54 AM
01/08/17 10:54 AM
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Joined: Jan 2003
Posts: 10,738 North Dakota
6PakBee
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 10,738
North Dakota
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....How many people here have actually seen a .060" over cylinder fail in a stock type build in ANY Mopar block?....Kevin A few years ago one of the members bored a 383 out to 0.060 over and had it sonic checked. Thrust face was right at 0.090 and he asked if he could run at that. I replied that he could, he believed me and did, ended up with a cylinder wall crack. So yes, Virginia, it does happen.
"We live in a time when intelligent people are being silenced so that stupid people won't be offended".
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Re: Any problem boring 060" over?
[Re: 6PakBee]
#2229989
01/08/17 01:14 PM
01/08/17 01:14 PM
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Joined: Nov 2013
Posts: 595 Nashville, Tennessee
Tempest
mopar
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mopar
Joined: Nov 2013
Posts: 595
Nashville, Tennessee
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....How many people here have actually seen a .060" over cylinder fail in a stock type build in ANY Mopar block?....Kevin A few years ago one of the members bored a 383 out to 0.060 over and had it sonic checked. Thrust face was right at 0.090 and he asked if he could run at that. I replied that he could, he believed me and did, ended up with a cylinder wall crack. So yes, Virginia, it does happen. I did worse with another make. However, I was not aware of the problem when I bought the block. It was only +.030" but was a 700HP, high RPM motor. Had all the good stuff, light weight JE pistons, Al rods, roller cam etc. Previous owner never sonic checked block when they made into race motor. Thrust wall was .080", other side .300". It had core shift. Fate caught up with it. Finally at top of 2nd gear around 7,200 it let go. Everything that moved in the motor was junk. I mean everything. I would never do a performance motor ever again without sonic checking.
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Re: Any problem boring 060" over?
[Re: Noah Zarq]
#2230000
01/08/17 01:27 PM
01/08/17 01:27 PM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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I'm not looking for a street/strip warrior, just a daily driver engine to replace the aged slant six in my 84 D100. Low po DD, the odds are well in your favor. What Nanket said, more info on the scratch. EDIT with more thought (& rereading your OP) I would NOT rebore it but just rering it with some file fit plasma moly rings with dingleberry honing it with a their 320 grit. I dont think that scratch will be any problem & I would bet my last dollar that you will be fine & end up with more power & plenty of longevity (plus you're gaining almost 40 cubes) & you could spend some of that cash on milling the heads.
Last edited by RapidRobert; 01/08/17 02:13 PM. Reason: more info/thought
live every 24 hour block of time like it's your last day on earth
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Re: Any problem boring 060" over?
[Re: Tempest]
#2230524
01/09/17 12:34 AM
01/09/17 12:34 AM
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Joined: Jan 2003
Posts: 16,376
dogdays
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 16,376
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Yes, Blazin' Bob has the answer. Don't worry about it. The ridge is probably carbon and can come off with a pocket knife.
It's a cheap block and not worth sonic checking. I'd sleeve it first if 0you must, leave it at 40 over. BTW, a '9 360 block is NOT a 5.9 Mag block.
R.
Last edited by dogdays; 01/09/17 12:36 AM.
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