Front ex flange nuts regularly come loose.
Thread Starter
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Tourer
Joined: Sep 2022
Posts: 439
Likes: 73
From: Ireland
I've already tried a different nut and at first it seemed to have sorted it but not so.Im gonna drop it to Harley and have them remove it and re seat it.
Road Master
Joined: Jul 2008
Posts: 859
Likes: 416
From: In the mountains
So the dealer installed it? If so you checked all the other mounting points?
Cruiser
Joined: Oct 2021
Posts: 233
Likes: 140
From: California
I always use anti seize. Never had them loosen up . I check them frequently,every 1k or so.
I always tighten down the pipes to the head first.if a gap is created on the lower mount, I shim accordingly. Do you have the correct gaskets ?
Some brands do not take the stock tapered ones and take the flat ones.
I always tighten down the pipes to the head first.if a gap is created on the lower mount, I shim accordingly. Do you have the correct gaskets ?
Some brands do not take the stock tapered ones and take the flat ones.
Last edited by Toolmaker5150; Jun 28, 2023 at 10:47 PM. Reason: add info
Thread Starter
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Tourer
Joined: Sep 2022
Posts: 439
Likes: 73
From: Ireland
no they didn't.I installed it.Im gonna give it to Harley though and let them do it.
Thread Starter
|
Tourer
Joined: Sep 2022
Posts: 439
Likes: 73
From: Ireland
I always use anti seize. Never had them loosen up . I check them frequently,every 1k or so.
I always tighten down the pipes to the head first.if a gap is created on the lower mount, I shim accordingly. Do you have the correct gaskets ?
Some brands do not take the stock tapered ones and take the flat ones.
I always tighten down the pipes to the head first.if a gap is created on the lower mount, I shim accordingly. Do you have the correct gaskets ?
Some brands do not take the stock tapered ones and take the flat ones.
I got replacement gaskets from Harley before I installed it.Theyre the biggest PITA gaskets I've ever used thused.They're such a tight fit
Road Master
Joined: Jul 2008
Posts: 859
Likes: 416
From: In the mountains
"There was a gap at the frame bracket for sure when torqueing the flange nuts first.Surely this could be a factor?"
From my post: "If the pipes don't have adequate support between the head and the trans area, they will come loose,"
What I was alluding too. Just trying to help.
From my post: "If the pipes don't have adequate support between the head and the trans area, they will come loose,"
What I was alluding too. Just trying to help.
Thread Starter
|
Tourer
Joined: Sep 2022
Posts: 439
Likes: 73
From: Ireland
"There was a gap at the frame bracket for sure when torqueing the flange nuts first.Surely this could be a factor?"
From my post: "If the pipes don't have adequate support between the head and the trans area, they will come loose,"
What I was alluding too. Just trying to help.
From my post: "If the pipes don't have adequate support between the head and the trans area, they will come loose,"
What I was alluding too. Just trying to help.
If you follow the vance and hines instructions it doesn't reference this.The kit did come with a 'spacer' bracket which is placed between the frame and the support bracket but in the YT screenshot they have it spaced out even more and I think this is what I need to do.
So my bike had a gap in the blue region which closed when the 4 bolts were tightened but this gap and closing of the gap could be 'pulling' the head pipe from the ex ports over time thus causing the flange nuts to loosen.
Last edited by murphc13; Jun 30, 2023 at 12:16 AM.
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Seasoned HDF Member
Joined: Sep 2017
Posts: 12,233
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From: England
I have a 2008 Sportster here and experienced the same thing with the header flange nuts coming loose. I put it down to the fact the studs are very clean with no corrosion. I just kept on checking them. After a while they stopped coming loose.
Road Master
Joined: Jul 2008
Posts: 859
Likes: 416
From: In the mountains
"they have it spaced out even more and I think this is what I need to do"
Worth a try, if it looks straight viewing from the back of the bike, then you can assume there is no or little pressure.
Worth a try, if it looks straight viewing from the back of the bike, then you can assume there is no or little pressure.
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