Spark Plug thread broken...
Thread Starter
|
Novice
Joined: Oct 2011
Posts: 18
Likes: 0
From: malaysia
Spark Plug thread broken...
is there any jig to fix the thread for the spark plug? or any angle to straighten the head before we fix the thread? My front head spark plug thread broken. Need to fix it. have to tell the machinist if there any jig or angle to do it. Thank you...
Seasoned HDF Member
Joined: Nov 2006
Posts: 12,878
Likes: 5,449
From: la la land jerzey
any one who claimed to be a machinist and need a tool to set a spark plug angle in the milling machine needs a different job
a tool is available for that in a productions shop but the tool is 700 US dollars - as it does every angle on all the old heads for valve seats - valve guides - plug holes and alike
a tool is available for that in a productions shop but the tool is 700 US dollars - as it does every angle on all the old heads for valve seats - valve guides - plug holes and alike
Thread Starter
|
Novice
Joined: Oct 2011
Posts: 18
Likes: 0
From: malaysia
any one who claimed to be a machinist and need a tool to set a spark plug angle in the milling machine needs a different job
a tool is available for that in a productions shop but the tool is 700 US dollars - as it does every angle on all the old heads for valve seats - valve guides - plug holes and alike
a tool is available for that in a productions shop but the tool is 700 US dollars - as it does every angle on all the old heads for valve seats - valve guides - plug holes and alike
Thread Starter
|
Novice
Joined: Oct 2011
Posts: 18
Likes: 0
From: malaysia
All the thread gone. Kickstart it and the spark plug flew off. Checked the thread, all gone. Im going to find a tap for it at a car spare parts and try rethread it without taking out the head. If fail then off to machine shop.
Club Member
Joined: Sep 2010
Posts: 15,430
Likes: 7,124
From: Beyond Fucital
I blew a plug in my E350. There's a kit they sell that Cleans the hole and you put in a threaded piece.
Last edited by RANGER73; Jun 10, 2015 at 09:23 AM.
Trending Topics
Thread Starter
|
Novice
Joined: Oct 2011
Posts: 18
Likes: 0
From: malaysia
is it a M14 (1.25 thread)? Correct me if im wrong... i measure it with a gauge but i might be wrong
HD Forum Stories
The Best of Harley-Davidson for Lifelong Riders
7 Surprising Harley-Davidson Products that Are Not Motorcycles
Verdad Gallardo
8 Best Harley-Davidson Motorcycles Ever
Pouria Savadkouei
10 Worst Harley-Davidson Motorcycles Ever
Pouria Savadkouei
Killer Custom's Jail Break Is The Breakout That Refused to Blend In
Verdad Gallardo
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?
Verdad Gallardo
Harley-Davidson Reveals Super Cool Cafe Racer Concept
Verdad Gallardo
Engraved Rebellion: Inside Bundnerbike's Glam Rock II
Verdad Gallardo
10 Motorcycles You Should Never Buy
Joe Kucinski
10 Things Harley-Davidson Needs to Fix in 2026
Verdad Gallardo
Seasoned HDF Member
Joined: Oct 2005
Posts: 7,495
Likes: 3,705
From: Santa Klaus County, Cali
Repair it once, the right way.
Seasoned HDF Member
Joined: Jul 2014
Posts: 8,590
Likes: 3,362
From: Cental, MI
do yourself (and your bike) a favor. Pull the head, weld and retap the hole to the correct dimension and size. Helicoil is a temporary (at best) fix and will eventually (sooner not later) fail. You do not want to be on a stretch of road, a long way from nowhere, and have the plug and helical fail.
Repair it once, the right way.
Repair it once, the right way.
bt-dt