About how long do Moly rings take to seat? - Hot Rod Forum : Hotrodders Bulletin Board
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Old 12-30-2005, 11:37 AM
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About how long do Moly rings take to seat?

Hey all, I just found out about the moly rings in my engine. My dad thought he had cast iron quick seaters but he got to talking with the machinist and found out they actually had "Chrome Moly" rings in there.

Actually, I don't really know if they're 'chrome moly', here's the link rings

They're the SLP-E-251K030



How long would these take to seat?

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Old 12-30-2005, 12:24 PM
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There are chrome rings and there are moly rings, the SLP-E-251K030's are iron moly rings. Chrome-moly is a high strength steel not used for piston rings. A moly ring should seat quickly. Make sure your cylinders are moly ring walled...
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Old 12-30-2005, 12:28 PM
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I was kind of looking for a mile time.
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Old 12-30-2005, 12:47 PM
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Mine were seated in the time it took me to warm up the engine and adjust the carb.
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Old 12-30-2005, 01:22 PM
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yep.they seat right away...no break in at all
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Old 12-30-2005, 02:52 PM
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By the time you have installed all pistons, installed the cam and adjusted the valves to start the engine, your moly rings should be fairly well seated. That is only if you had the cylinders honed for moly rings. If you did not have the cylinders honed for moly rings, they are totally worn out by the time you fire the engine.
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Old 12-30-2005, 03:18 PM
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Quote:
Originally Posted by larryblack
By the time you have installed all pistons, installed the cam and adjusted the valves to start the engine, your moly rings should be fairly well seated. That is only if you had the cylinders honed for moly rings. If you did not have the cylinders honed for moly rings, they are totally worn out by the time you fire the engine.
Then what happens? It just eats oil all it's life?
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Old 12-30-2005, 03:50 PM
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Quote:
Originally Posted by Larryblack
By the time you have installed all pistons, installed the cam and adjusted the valves to start the engine, your moly rings should be fairly well seated. That is only if you had the cylinders honed for moly rings. If you did not have the cylinders honed for moly rings, they are totally worn out by the time you fire the engine.
Quote:
Originally Posted by Malibu73
Then what happens? It just eats oil all it's life?
Pretty much. with moly faced rings, wall RA is critical.
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Old 12-30-2005, 04:10 PM
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Unless the term moly rings means something else, moly rings as I know them are low tension for performance use. They were not known for great oil control. For street use, you used a SINGLE moly set. One ring was old fashioned iron and sealed better and the other provided the low tension/low friction for more power.

There are moly coated rings and rings with a grove filled with moly. Chrome moly did once upon a time exist as a compound on rings but it was costly and provided not a whole lot of gains.

Today's technologies allow the rings to seal better and last much longer while still providing low friction. I would be more prone to use the same construction of rings GM and Ford use the the LS and Cobra engines.
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Old 12-30-2005, 07:23 PM
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Quote:
That is only if you had the cylinders honed for moly rings. If you did not have the cylinders honed for moly rings, they are totally worn out by the time you fire the engine
i din't know that, wow i learneded something. i'm becoming edumacated

so i guess that means i'll be taking a trip down to my machine shop

J
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Old 01-01-2006, 09:35 AM
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If you did not have the cylinders honed for moly rings, they are totally worn out by the time you fire the engine
were did you find this out? i havn't seen or herd that anywhere else but here. i'm gonna ask my machinists tomorrow

J
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Old 01-02-2006, 01:53 PM
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Thank you guys for chiming in and mentioning the cylinder wall finish.

I have had the C--- beat out of me on these threads for suggesting such a thing and my mentioning that MOST machines shops are stuck in the 60s with their techniques...doing every cylinder wall the same way, not considering the ring types.

IMO you better know who is doing your cylinders, or else.
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