Intake manifold - what type of rubber?

Does anyone know the type of rubber intake manifolds are made from?

OKC_Kent wrote:

Does anyone know the type of rubber intake manifolds are made from?

im not sure but my guess would be nitrile

Nitrile (NBR; BF, BG, BK, CH): The nitriles are copolymers of butadiene and acrylonitrile, used primarily for applications requiring resistance to petroleum oils and gasoline. Resistance to aromatic hydrocarbons is better than that of neoprene but not as good as that of polysulfide. NBR has excellent resistance to mineral and vegetable oils, but relatively poor resistance to the swelling action of oxygenated solvents such as acetone, methyl ethyl ketone, and other ketones. It has good resistance to acids and bases except those having strong oxidizing effects. Resistance to heat aging is good, often a key advantage over NR.

With higher acrylonitrile content, the solvent resistance of an NBR compound is increased but low-temperature flexibility is decreased. Low-temperature resistance is inferior to that of natural rubber, and although NBR can be compounded to give improved performance in this area, the gain is usually at the expense of oil and solvent resistance. As with SBR, this material does not crystallize on stretching, and reinforcing materials are required to obtain high strength. With compounding, nitrile rubbers can provide a good balance of low creep, good resilience, low permanent set, and good abrasion resistance.

Tear resistance is inferior to that of natural rubber, and electrical insulation is lower. NBR is used instead of natural rubber where increased resistance to petroleum oils, gasoline, or aromatic hydrocarbons is required. Uses of NBR include carburetor and fuel-pump diaphragms and aircraft hoses and gaskets. In many of these applications, the nitriles compete with polysulfides and neoprenes.

Yeah, what he said.

I was gonna say black rubber, but Steve's answer is probably a bit more useful to you...

Black rubber.hahaha Sounds like we're on the same page. You kill me!!!!!

i was gonna say black too!:whistle: :evil:

Thank you fixer, appreciate it.

C'mon Kent- give us a clue why you were asking?:huh:

hes gonna start casting them!

wireman wrote:

hes gonna start casting them!

Cool! I'll buy a couple!

There is another thread where he is fixing some intakes on a friend's bike.

I make mine out of nickel plated steel.



Post edited by: loudhvx, at: 2006/10/14 12:42

A pair of those go on a KZ400. Then I use any old piece of radiator hose from a car.




Post edited by: loudhvx, at: 2006/10/14 12:46

Nevco48 wrote:

C'mon Kent- give us a clue why you were asking?:huh:

My friend can't afford new manifolds on his Suzuki 650, and one of his is broken. We are trying to find out what kind of rubber it is, so we can buy appropriate glue/ adhesive to bond it back together.

I wish I had a lathe to make him some new ones, those are sharp!

Post edited by: OKC_Kent, at: 2006/10/15 00:16