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11-15-2021, 09:36 AM | #1 |
Junior Member
Join Date: Nov 2021
Location: Hamilton, Ontario, Canada
Posts: 22
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Badly worn Valve guides
Hi,
I have a 1926 "T" with badly worn valves, guides and exhaust seats and I am wondering if anybody has recommendation for replacement valve guides, valves and seats? Are model A two piece guides an option? Thanks James |
11-15-2021, 10:51 AM | #2 |
Senior Member
Join Date: Jul 2010
Location: Pennsylvania
Posts: 1,096
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Re: Badly worn Valve guides
I do not believe that the T engine has replaceable valve guides. Venders sell valves with oversized shafts and reamers to make them fit the worn guides.
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11-15-2021, 11:18 AM | #3 |
Junior Member
Join Date: Nov 2021
Location: Hamilton, Ontario, Canada
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Re: Badly worn Valve guides
Thanks Will
I was hoping somebody had a work around! James |
11-15-2021, 07:07 PM | #4 |
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Join Date: Jun 2010
Location: San Antonio, Texas
Posts: 16,367
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Re: Badly worn Valve guides
Langs has .015" oversize and .030" oversize valves. A person would need the reamer and reamer guide bushing for each size needed to center ream the old guide. A machine shop could likely set the block up to align bore the old guides as well as long as they have the equipment to do it. If the worn guide bore isn't too far off center then the reamer may work without a guide bushing.
Broken guides can be replaced with cast iron but it may require fabrication by the machinist doing the job. Some T motors had replaceable guides but not all that many from what I understand. Some rebuilders may install valve guide sleeves instead of oversized valves. Last edited by rotorwrench; 11-15-2021 at 07:16 PM. |
11-16-2021, 04:43 PM | #5 |
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Join Date: Nov 2021
Location: Hamilton, Ontario, Canada
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Re: Badly worn Valve guides
Thank you for the information I will have a look at Langs web site.
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11-28-2021, 09:22 PM | #6 |
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Join Date: Nov 2021
Location: Hamilton, Ontario, Canada
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Re: Badly worn Valve guides
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11-29-2021, 08:19 AM | #7 |
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Join Date: Jun 2010
Location: San Antonio, Texas
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Re: Badly worn Valve guides
Run some Marvel Mystery oil additive in the fuel. There are instructions for mixing on the product container. MMO was and still is used in many old airplanes that use the small Continental 4-cylinder engines to prevent valve problems.
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11-29-2021, 03:49 PM | #8 |
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Join Date: May 2010
Location: Portland OR
Posts: 6,339
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Re: Badly worn Valve guides
Check Lang's, there are 3 sizes of standard type valves along with the modern replacement type valve that uses the standard valve spring retainer clips.
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