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 FMF: header <-> Q4: which silicone?

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deerHater




PostSubject: FMF: header <-> Q4: which silicone?   Tue Oct 19, 2010 9:33 am

What type of silicone should be used for the muffler pipe to head (megabomb) joint?
Is there a special high temperature silicone for this?

I tried Canadian Tire, nothing seemed appropriately labelled for the job...

Maybe auto parts stores have something more suitable?
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f3joel

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PostSubject: Re: FMF: header <-> Q4: which silicone?   Tue Oct 19, 2010 6:11 pm

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njbill

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PostSubject: Re: FMF: header <-> Q4: which silicone?   Tue Oct 19, 2010 8:57 pm

This is the second bike I put a Q4 on and I did not use silicone on either. dunno
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Guest
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PostSubject: Re: FMF: header <-> Q4: which silicone?   Wed Oct 20, 2010 1:47 am

Next time, I'll probably try it without sealer.

First time, I used red high temp permatex silicone. I put a light bulb under it overnight or more 'cause I know the red loves to bubble and boil until it's cured. Seems to have worked; no bad manners.

I use the light bulb thing for various curing heat... epoxy, etc. I call it "easy baking" the part. Obvious reasons.

Again, many say silicone is not necessary so I might try it next time without sealer..

BigFeet
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YamX1KRR




PostSubject: Re: FMF: header <-> Q4: which silicone?   Wed Oct 20, 2010 5:14 pm

I used the red permatex as well, not sure if it is doing anything, haven't noticed anything. Next time I will use some stuff made for exhausts, Napa has some, not sure where else.

I did try it without anything, and it seemed to leak a decent amount (Q4 & Powerbomb). Not enough to hurt anything, but I could hear it hissing where the leak was, and just wanted it to be correct.
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mullet2006

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PostSubject: Re: FMF: header <-> Q4: which silicone?   Tue Dec 07, 2010 3:49 am

deerHater wrote:
What type of silicone should be used for the muffler pipe to head (megabomb) joint?
Is there a special high temperature silicone for this?

I tried Canadian Tire, nothing seemed appropriately labelled for the job...

Maybe auto parts stores have something more suitable?


When i put on my megabomb and q4 the fmf instructions said to use a hi-temp rtv silicone.
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SheWolf
Alpha Rider
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PostSubject: Re: FMF: header <-> Q4: which silicone?   Tue Dec 07, 2010 11:05 am

The stuff I use is orange. Copper hi temp rtv silicone by Permatex.

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Midnite171

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PostSubject: Re: FMF: header <-> Q4: which silicone?   Fri Mar 04, 2011 7:41 am

Do you need to put any between the Powerbomb and the engine? Or is there a gasket that does the job?
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deerHater




PostSubject: Re: FMF: header <-> Q4: which silicone?   Fri Mar 04, 2011 4:53 pm

Midnite171 wrote:
Do you need to put any between the Powerbomb and the engine? Or is there a gasket that does the job?
Yes, buy a new header gasket, it's pretty inexpensive.
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