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MPX Broken Piston (Tappet) and Stuck Gas Ring Login/Join 
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Picture of Smokey99
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After about 6,000 rounds my Piston (Tappet) broke. The Gas Plug came out without a problem. Removed broken piston without problem. The PROBLEM is trying to get the Gas Ring (spiral McFarland?) off the Plug - it is carbon caked in place. Could not get the dental pick to grab the end. Started soaking it in Stihl Carbon Remover. Any of you have experience with the removal that could help? Thanks!


"Son, always take your paper to the woods" - my dad
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3 Gun, PCC, IDPA, Bullseye Shooter
 
Posts: 311 | Location: Upstate SC | Registered: October 11, 2010Reply With QuoteReport This Post
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on (Tappet) broke. The Gas Plug came out without a problem. Removed broken piston without problem. The PROBLEM is trying to get the Gas Ring (spiral McFarland?) off the Plug - it is carbon caked in place. Could not get the dental pick to grab the end. Started soaking it in Stihl Carbon Remover. Any of you have experience with the removal that could help? Thanks!

Try here.

https://inleadwetrust.com/prod...egory/parts-for-mpx/
 
Posts: 5482 | Location: Virginia | Registered: December 23, 2010Reply With QuoteReport This Post
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Picture of Smokey99
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I have already bought replacement Tappet and Gas Rings from them - need to get old rings off plug.


"Son, always take your paper to the woods" - my dad
NRA Endowment Life Member
3 Gun, PCC, IDPA, Bullseye Shooter
 
Posts: 311 | Location: Upstate SC | Registered: October 11, 2010Reply With QuoteReport This Post
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carefully use the cutoff wheel on your dremel to cut through the wheel if all else fails. I have had to do it many times
 
Posts: 29 | Location: Missouri | Registered: January 22, 2014Reply With QuoteReport This Post
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Picture of Smokey99
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Great news! The Stihl Carbon Remover worked! Was able to lift out the end of the gas ring easily with a dental pick!!


"Son, always take your paper to the woods" - my dad
NRA Endowment Life Member
3 Gun, PCC, IDPA, Bullseye Shooter
 
Posts: 311 | Location: Upstate SC | Registered: October 11, 2010Reply With QuoteReport This Post
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and Destruction
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How many rounds do you have through it?
 
Posts: 6795 | Location: Raymore, Missouri | Registered: June 24, 2006Reply With QuoteReport This Post
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9,500 plus or minus 100. I originally said 6,000 but that was just for a different part.


"Son, always take your paper to the woods" - my dad
NRA Endowment Life Member
3 Gun, PCC, IDPA, Bullseye Shooter
 
Posts: 311 | Location: Upstate SC | Registered: October 11, 2010Reply With QuoteReport This Post
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