Worn piston rings: now what?

[Avetiso]

So, the M54B30 from my parts car has low compression in cylinders 3, 5, and 6. All other cylinders are ~200psi, these are at 60-90 psi. Added oil to those cylinders, shot up to around 200 (except for 6, which only went up to 150).

So... what do I do with it? Probably not worth rebuilding... but I'm now caught staring at an engine that isn't really worth anything as a whole, and I'm kind of stumped.

Any worth to rebuilding it?

[wertyu78]

Rebuild it. It's a ton of fun. Feel free to ask me any questions. You can rebuild it 85% with all machine work for $1,200 or even less. Doesn't hurt to have a backup engine.

[Avetiso]

Rebuild it. It's a ton of fun. Feel free to ask me any questions. You can rebuild it 85% with all machine work for $1,200 or even less. Doesn't hurt to have a backup engine.

What did the machine work cost? My dad is a machinist so he could help me with it.

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[wertyu78]

What did the machine work cost? My dad is a machinist so he could help me with it.

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$500. If you use aftermarket bearings you could do it for $500 or so.


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[PirateZHP]

Do it, Dario!

[Avetiso]

$500. If you use aftermarket bearings you could do it for $500 or so.


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Not bad. So what exactly did you have to buy?

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[wertyu78]

Let me get on a PC and make a list


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[Smolck]

I'd rebuild it with forged rods and VAC pistons. Your crank is forged and can take a LOT of abuse, might as well beef up the weaker points. ARP bolts and hardware, a little head work, you now have a daily driver that will hit 8000rpm...

[midlandtech]

I'd rebuild it with forged rods and VAC pistons. Your crank is forged and can take a LOT of abuse, might as well beef up the weaker points. ARP bolts and hardware, a little head work, you now have a daily driver that will hit 8000rpm...

Yes make it a beast

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[Avetiso]

I'd rebuild it with forged rods and VAC pistons. Your crank is forged and can take a LOT of abuse, might as well beef up the weaker points. ARP bolts and hardware, a little head work, you now have a daily driver that will hit 8000rpm...

I think I'd also need solid lifters.

The problem is that I was simply looking to sell the engine. I can't afford to build a performance once (as much as I'd love to), for all intents and purposes, I need to get this engine to be reliable with good compression and then just get my money back for it. I'll be asking much more for it than I was previously, so I don't think I'd lose money on the rebuild, it's just the time/work that I don't want to do.