Piston Slap in AMC 360, repairable?

Piston Slap in AMC 360, repairable?

Greenmule

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Berthoud, Colorado
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1981 CJ5 AMC 5.0L, Ramsey 8k winch, Goodyear MTR 35/12.50/15, 2" Body lift, Dana 44 Rear with ARB front and rear air locker, 4:1 Gear Reduction, Warn locking hubs front and rear, front disconnecting sway bar. Power Steering brace. Rock sliders. Acme hard top. TeamRush upgrade using MSD parts. E3 Sparkplugs
So I found a AMC 360 out of a 1980 with 60k on it and that has been bored out .030". The price is $120 which is great but it has piston slap on #8. Oil pressure is said to be 20-30psi and Im guessing this is a idle.

So my question, is this engine even worth trying to fix or rebuild to replace my AMC 304 ? I was not sure since it was already bored out .030. I was also not sure it piston slap can be fixed in a rebuild. Any help would be great. Thanks.
 
Just my personal opinion but If you're determined to rebuild an engine, I would look for one thats not had one failed rebuild already.

Better still, try to find one that doesn't need to be rebuilt.
 
I agree with Ken. But from what I know you can bore up to .060. I have read that you should have the block tested for cracks and voids in the casting before boring to .060. The expense may not be worth it.
 
Last edited:
I forgot to mention that the engine had some of the emissions equipment needed for my jeep to pass emissions. This was part of the reason I am interested in this engine, but I am not sure I want a worthless long block sitting around.
 
Re-sleeving a cylinder isn't as expensive as you might think. If the #8 is toast, you can get it fixed.
 
Re-sleeving a cylinder isn't as expensive as you might think. If the #8 is toast, you can get it fixed.
Exatly. I had a piston sleeved on my 401 recently when a wristpin froze up and created piston slap bad enough to tear the hell out of that cylinder.
Having the cylinder bored and sleaved ran me $350

Edit> The new piston was included in that price.
 

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