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View Full Version : Stripped spark plug holes....



GrayMitchell
09-02-2009, 1:14 PM
Just realized that the basket 69 triumph ive been working on has stripped plug holes...actually only one is stripped, the other is tapped to a bigger size....

What are my options here?

GrayMitchell
09-02-2009, 2:10 PM
Nevermind, just dropped it at a locals shop. Hes gonna put some inserts in there.

rusjack
09-02-2009, 2:57 PM
Im half stripped on one of my holes on a bike too, whats the guy doing for it? filling and re-tapping it? Ive always wondered how/who can fix this

KT
09-02-2009, 4:05 PM
Helicoil inserts ... I have used them in 2 bikes I fixed for friends ...You can retap to a bigger size but there is some issues you have to watch for when you do that ....That's why most Heli coil them ...

GrayMitchell
09-03-2009, 6:22 AM
The guy I took them too has been in business for like 25 years. He said Helicoils suck....hes using some kind of threaded insert that you screw in then it has these little stainless pins that hold it in....???

KT
09-03-2009, 8:22 AM
Hmm dunno about those ..Sounds better ....

Boylecomm
09-03-2009, 10:21 AM
These are Bitchin.

http://www.timesert.com/

KT
09-03-2009, 10:37 AM
These are Bitchin.

http://www.timesert.com/

Those do look the shit man lot better than a heli

NaK
09-05-2009, 8:15 PM
This should go to the main forum so everyone can see this.

rusjack
09-29-2009, 2:45 PM
anyone have anything on this they can chime in? I have a single cylinder on my bench right now that i just did everything i could for low compression, and now i can actually hear the air escaping from the spark plug hole.... anyone have good luck with popping helicoils in at home?

framus
09-30-2009, 7:27 AM
Where is the air escaping from? My guess is that it's coming past the helicoil fix as that's not much of an air/water/oil proof fix in my experience. If it were anything but a spark plug, I'd just throw some sealer in there and call it a day but it sounds to me like you're in for a trip to the machine shop. Personally, I'd have someone TIG some aluminum down there in that hole and have the hole completely re-drilled, tapped and whatnot.

rusjack
09-30-2009, 12:05 PM
nah.. there isn't an insert in mine yet. I can't tighten down the spark plug anymore, it just keeps going.. threads are ruined.

im going to try one of these -> http://www.sjdiscounttools.com/hel5334-14.html before anything... from the people I've called in town, this is a fraction of the cost they want to repair.

ive been tempted to just jb weld the plug in place and deal with it later.

justbrian
09-30-2009, 5:40 PM
I guess I've never tried it but I have a hard time imagining either a heli-coil (or especially jb weld) holding up to that amount of force leak-free.

billdozer
09-30-2009, 6:26 PM
This should go to the main forum so everyone can see this.

Yeah, if someone does a Timesert how-to we'll put it in the Greatest Hits for sure.

rusjack
10-30-2009, 11:06 AM
im going to try one of these -> http://www.sjdiscounttools.com/hel5334-14.html before anything... from the people I've called in town, this is a fraction of the cost they want to repair.

Good news on this front. I picked this kit up for 25 dollars or so, and it was fine... super basic. One tap.. starts off as a standard 14mm tap to thread in, then widens to be wide enough for the helicoil. Little bit of hi-temp red silicon on the threads of the insert, screw it in and punch it with the expanding tool and a hammer, voila! Compression went from 30psi to clearing 130psi, and the bike runs. Perfect!

Boylecomm
11-03-2009, 12:44 PM
Shit! we just did one in one the upper motor mounts on my panhead.


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Yeah, if someone does a Timesert how-to we'll put it in the Greatest Hits for sure.

TemeculaTerry
11-04-2009, 8:03 PM
Does asnyone have one of these kits local? I need a thread fixed up on my rear drum...

Boylecomm
11-05-2009, 11:51 AM
http://www.flandersco.com/Images/PDF/160-Thread%20Repair.pdf




Does asnyone have one of these kits local? I need a thread fixed up on my rear drum...