Lost exhaust bolts
#21
10-25-2012, 09:09 AM
Seasoned HDF Member
I guess it's a little tricky to remove the stud from the head... i would say some PB Blaster... let soak for 24 hours you could weld a nut to the tip of the stud....A lot of heat and elbow grease...If it's just the nut, i usually check them every 10000-15000 miles...on the FXDP i put grade 8 with grade 8 lock washers, ran it if a while and re-snugged them...
#22
10-25-2012, 09:45 AM
HDF Community Team
I have had this problem with my 08 Nightster. After about 5000 miles I lost the rear nut(one) then it got replaced by the dealer. Everything was fine until 25,000 miles when I thought I lost the front cylinder stud(one stud). Took it to a private mechanic as my warranty had expired. Found out that the stud actually sheared off. While attempting to replaced the other front stud that one also sheared off. so both needed to be drilled and tapped. The Mechanic said he would use high grade stainless studs and I would never have to worry again. He only charged me 80 bucks. plus he changed the rear nuts that were rusted badly. Now, 600 miles later I have another front stud gone. Must be from really running her hard and hot? I use synthetic oil and stock plugs and ignition. Word of advice: don't ride her too far as that can burn exhaults valves.
John
Last edited by John Harper; 10-25-2012 at 06:19 PM.
#23
10-25-2012, 05:42 PM
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cHarley made this recommendation a couple of years ago, I bought these and so far so good. They take an 11/32" 12 point socket.
Originally Posted by cHarley
I've been through several different remedies to try and stop exhaust flange nuts from coming loose.
First of all, Blue Loctite really doesn't work here, the stud temperatures exceed the published melting point of Blue Loctite.
The one solution I've found if you want to be sure there not going to loosen, is to use ARP aircraft nuts. These are sometimes referred to as Jet or Kay nuts. You can order them (5/16-24 12pt) nuts from Jegs.com. These nuts have elliptical threads which makes them self-locking. The second advantage of these nuts is it's design. The socket size required for the nut is smaller than what would be required for a standard 5/16 nut, which means easier clearance between the socket and cylinder fins.
You can find them HERE for $1.99ea +shipping. Not cheap, but they damn sure won't come loose.
Originally Posted by cHarley
I've been through several different remedies to try and stop exhaust flange nuts from coming loose.
First of all, Blue Loctite really doesn't work here, the stud temperatures exceed the published melting point of Blue Loctite.
The one solution I've found if you want to be sure there not going to loosen, is to use ARP aircraft nuts. These are sometimes referred to as Jet or Kay nuts. You can order them (5/16-24 12pt) nuts from Jegs.com. These nuts have elliptical threads which makes them self-locking. The second advantage of these nuts is it's design. The socket size required for the nut is smaller than what would be required for a standard 5/16 nut, which means easier clearance between the socket and cylinder fins.
You can find them HERE for $1.99ea +shipping. Not cheap, but they damn sure won't come loose.
#24
10-25-2012, 07:07 PM
HDF Community Team
cHarley made this recommendation a couple of years ago, I bought these and so far so good. They take an 11/32" 12 point socket.
Originally Posted by cHarley
I've been through several different remedies to try and stop exhaust flange nuts from coming loose.
First of all, Blue Loctite really doesn't work here, the stud temperatures exceed the published melting point of Blue Loctite.
The one solution I've found if you want to be sure there not going to loosen, is to use ARP aircraft nuts. These are sometimes referred to as Jet or Kay nuts. You can order them (5/16-24 12pt) nuts from Jegs.com. These nuts have elliptical threads which makes them self-locking. The second advantage of these nuts is it's design. The socket size required for the nut is smaller than what would be required for a standard 5/16 nut, which means easier clearance between the socket and cylinder fins.
You can find them HERE for $1.99ea +shipping. Not cheap, but they damn sure won't come loose.
Originally Posted by cHarley
I've been through several different remedies to try and stop exhaust flange nuts from coming loose.
First of all, Blue Loctite really doesn't work here, the stud temperatures exceed the published melting point of Blue Loctite.
The one solution I've found if you want to be sure there not going to loosen, is to use ARP aircraft nuts. These are sometimes referred to as Jet or Kay nuts. You can order them (5/16-24 12pt) nuts from Jegs.com. These nuts have elliptical threads which makes them self-locking. The second advantage of these nuts is it's design. The socket size required for the nut is smaller than what would be required for a standard 5/16 nut, which means easier clearance between the socket and cylinder fins.
You can find them HERE for $1.99ea +shipping. Not cheap, but they damn sure won't come loose.
Wow, the nut flats are only 1/32 bigger than the stud diameter? That is narrow.
Look like a good solution.
John
Last edited by John Harper; 10-25-2012 at 07:09 PM.
#27
10-28-2012, 08:43 AM
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