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Aluminum Spark Plug Tubes

Looking for oil leaks I found five out of six spark plug tubes leaked into the plug area. The sixth was changed about a year ago and dry. The leaking five were easy to remove because the o-rings lost enough compression that the tubes could be rotated. The recently replaced one was difficult because of the smooth bore and taper left little grip even with a blind hole bearing puller. Instead of just replacing the o-rings I decided to make new tubes in aluminum with a groove at the end so a puller has some grip.



The manual says to push the tubes into place. I found they could not be pushed in by hand but I was able to press them in using the coil and mounting screws.
A little heavier than the plastic but they will not break when removing them.
Old 12-13-2017, 09:17 PM
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Wow - that's awesome!
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Old 12-15-2017, 04:35 AM
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Very interesting!
Old 01-12-2018, 10:15 AM
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Nice!
Taking orders?
Old 01-12-2018, 05:03 PM
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Very nice. Probably spendy to produce. But very nice.
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Old 01-14-2018, 05:15 AM
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Price would depend upon how many sets to make. The setup time has to be added in. What interest is there?
Old 01-16-2018, 09:25 PM
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Quote:
Originally Posted by DMadigan View Post
Price would depend upon how many sets to make. The setup time has to be added in. What interest is there?
I'm interested, But it depends on the price. I just replaced my plastic tubes and o-rings, so I could wait for you to produce some or if the price is good, could pay in advance.
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Old 01-18-2018, 01:14 PM
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Obviously has to be worth your time too.
As Brian said, Ballpark WAG?
PM if you donít want to outright post a price.
Thanks..
Old 01-18-2018, 05:51 PM
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I looked into it, I have a friend with a CNC mill. Decided not to, couldn't find a reasonably priced source for the o-rings.
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Old 01-30-2018, 05:54 AM
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Sorry for the delay, Windoz decided to take a dump and, of course, when it goes so do all your programs.
I have enough material for 4 sets (24 tubes). They would be $23.49 each including the silicone O-rings.
Old 01-30-2018, 01:36 PM
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Quote:
Originally Posted by DMadigan View Post
Sorry for the delay, Windoz decided to take a dump and, of course, when it goes so do all your programs.
I have enough material for 4 sets (24 tubes). They would be $23.49 each including the silicone O-rings.
Not a bad price, I sent my friend a new tube to prototype. Depends on the price from my friend. But the $150 for the set is affordable, especially if you can provide o-rings (and maybe replacement ones.)

I wonder if it would be effective to mount them in with the o-rings and high temp RTV?
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Old 02-02-2018, 07:01 AM
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Originally Posted by afterburn 549 View Post
Dont use RTV with "O" rings please .
Its bad ju ju.
Use silicone grease so it will always feel comfortable and move to fit.
next
Would a 3d printer do the job of making them?
Bad JuJu?

I'm old and out of the loop on 3D printers. However a CNC mill could kick 'em out pretty fast. My buddy was a local supplier for Boeing aircraft up in Renton WA.
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Old 02-03-2018, 02:45 PM
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