headers with a dent

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Can anyone advise me: will dented headers damage my engine. See piture, John.
 

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OP
OP
Joined
Jul 12, 2014
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uk
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st1100 + sidecar
How big would a dent have to be to be of onern?
 
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I concur - no dents worth worrying about there.

In fact, a dent would have to be very deep indeed (like a depth of 20-40% of the diameter of the pipe, I would guess) before it would markedly affect the flow of exhaust gasses or cause a hotspot that might promote a burn-through.
 
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[video=youtube;azPKIjxmmdU]https://www.youtube.com/watch?v=azPKIjxmmdU[/video]

Dented headers are apparently no cause for alarm.
 

Dale_I

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The only thing a dent would do to an exhaust would be to restrict air flow. If the dent isn't enough to protrude into the pipe enough to restrict air flow... just keep riding.
 
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Bigger question to me is: what is that black stuff all over the collector?
Over the pond, those guys use a sealant of some type on the swing arm because of the heavy road salt use in winter. This could be the same material.
 

SupraSabre

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I think something like this (one on the right) is to worry about!

dsc01391.jpg

And this:

dsc01381.jpg
 
OP
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I dont know what the black stuff is I just got the pipes, John.

Thankyou for the viedeo - amazing!!
 
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I think the black stuff is probably VHT paint, could be hiding a weld repair?
I agree with the other posters, dents like this are fine, although I think what you are referring to is the normal shape of the collector, possibly slightly altered by repair?
Upt'North.
 
OP
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uk
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I was the left hand side that was badly damaged - the guy dropped it off today - really serious damage almost bent, so I got a refund. Thankyou for your replies, John.
 
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