Epoxy used when Porting ?

[g90js5500]

Is there a proven epoxy used For Porting That is Gas Proof ?

 

[Dartman]

this has worked really well for gas resistance
http://www.zoro.com/i/G1139801/?utm...hopping_Feed&gclid=CL-K9pS22MMCFe7m7AodPEEAKA

 

[waxhead]

Jb weld works very well

 

[58vwragtop]

pc-11 is great epoxy or even pc-7 works great. You can use a heat gun to warm it up to make it a little more runny to fill in areas.

 

[txsuperjetfreak96]

I've used pc-11 before good stuff but not on a motor

 

[yamanube]

Not 100% related but still interesting. I have heard both JB Weld and Devcon being used.

 

[waxhead]

Yeah I used jb weld. I have never had an issue but I may go to loctite after seeing that. Good video

 

[jetx]

Good video indeed

 

[g90js5500]

Man... Great video, That answers My Question!!! thank you guys !!

 

[g90js5500]

I'M gonna do a Gasoline test on the loctite metal .. Will post my results

 

[g90js5500]

Applied Loctite Metal Epoxy to a Cast Aluminum Part with a hole in it for A good simulation ...Letting it cure For 24 Hours before i Dunk it in gas

 

[g90js5500]

Started Soak Last Night.. Plan On Soaking For 24 Hours ,Removing for 24 hrs....Rinse And Repeat a few Times.

 

[g90js5500]

Trying to Verify it Doesn't Degrade or Soften...That stuff Was As hard as Glass Before put t in the gas

 

[g90js5500]

Well,,After a couple Cycles of soaking and letting it sit on the bench for 24 hour periods the epoxy can now be scraped with my fingernail....Not sure if this is a common issue with all brands suggested in the post....but i don't think i would use the loctite metal in my motor.... I think ill try the jb weld next

 

[waxhead]

I have been using jb weld for ages, I have not had any come off other than when I had a guy let the engine sit in water for a month.
It corroded under the jbweld and lifted it off. Not really a fault of the jbweld.
I understand what you are saying about the loctite getting soft but its not sitting in fuel when its in your engine. Its in a fuel rich enviroment but the airflow past it will keep it dry as well

 

[augustaf]

Applied Loctite Metal Epoxy to a Cast Aluminum Part with a hole in it for A good simulation ...Letting it cure For 24 Hours before i Dunk it in gas

Epoxy just cured at room temperature might be considered still "green" at 24 hours. There also is a difference in chemistry between the product mentioned in post #2 and the "convenience" pack variety shown in post 11. The epoxy in post 2 holds up for a few years- at least for me- there is some initial shrinkage you'll need to get used to. Furthermore keep in mind: you don't get a chemical bond between the aluminum and the epoxy, so roughing up the surface and treating with Alumaprep helps adhesion!

 

[g90js5500]

With the Shrinkage you mentioned would you the apply a second application to try and insure no leaks ?

 

[g90js5500]

Also... How long would u recommend for cure time before running the motor ?

 

[g90js5500]

I let the epoxy air dry for 4 or 5 days and i can no longer scratch it away with my finger nail

 

[masterblaster]

interesting experiment, soaking epoxy in gas isnt a good test though,most an chemical will change when submerged in any kinda fuel,acetone,lacquer thinner. Ethching cross hatch lines in alum really helps adhesion to a huge extinct