Exhaust heat wrap.

[Horseynat30101]

Hey,

the exhaust on the zxr400 is abit "holey".... now i know i should realy be buying a new exhaust but do you think that gungum on the holes and the exhaust heat wrap stuff you cant get will do for now while i save up for some better downpipes?

thanks

[uk190]

yes, i recon you can, depending on the size of the holes.

use the gum to fill the holes, wrap it in tin foil (to stop the gasses blowing the gum out while it hardens) and wrap the header wrap a round the foil. hold the wrap in place with wire.

it will look loike normal header wrap and will poss last a good while if the gum sets properly.

bear in mind that most header wrap is designed to be under a car bonnet and will hold water like a sponge and will rot your pipes quicker. have a look on eebay for marine header wrap as this water resistant and doesnt hold water.

you'll prob find a standard second hand exhaust for the same price of the wrap!

[Horseynat30101]

Cheers the wrap is cheap on egay (i know you get what you pay for regarding quality) but it realy is a quick fix till i can afford some new headers

[uk190]

let us know how you get on. remember to let the gum fully harden before revving. let it sit on tick over for ages to really heat the exhaust.

[Stu]

No gungum is crap it shrinks and will just fall out it will also crack over time too

[Horseynat30101]

No gungum is crap it shrinks and will just fall out it will also crack over time too

 

but the exhaust wrap will hold it in place?

[Stu]

the exhaust will pull it in and push it out the end it will flake eventually

ask craig what happens to it he tried a repair before i looked at welding his for him and it just fell out within a few mins

[Horseynat30101]

hmmm might weld it then if its not all rust lmao, then cover it with wrap.

[megawatt]

Patch weld it, then wrap it?

[eastanglianbiker]

just weld plates to where it is good metal and dress the edges to shape as you go

[Horseynat30101]

yeh ill patch weld it and then wrap it (as the weld wont be pretty and the pipes are rusty anyway). Best get the bf to show me how to weld i like learning new things

[uk190]

i thought it was a temp repair til you replace them?

i have used gum on plenty of car exhausts over the years and yes it can shrink and crack, but usually over a long time or if it wasnt allowed to cure properly.

i have also tried to weld thin fatigued exhausts and know how awkward it can be. especially arc or mig. i know which one i would rather do for a temp fix...

brazing would be less likely to blow bigger holes. anyone on here tried that on headers?

if it is to be temp fix, it doesnt matter how ugly the weld/braze/gum looks as the wrap will hide it.

[Roadtorque]

use gum + a piece aluminium bent to the right shape & size to cover the area, then two jubilee clips to clamp it all together