Stock exhaust manifolds

[orangedust]

While driving the Duster I noticed it was a little louder than normal
(what's normal) :scratch: Anyhow on the passenger side exhaust manifold
has a bimetallic spring and rod that popped out of the manifold.
Is this a heat riser set up ?? Or is it some kind of smog equipment
for emissions. Can I pull it out and cap it? Thanks guys!! 8)

 

[GotDart]

Is this a heat riser set up ?? Or is it some kind of smog equipment
for emissions. Can I pull it out and cap it?

Yes, Yes, and Yes.

 

[HawaiiDuster]

It might be a date coded spring and pin :geek:

 

[Cuda66]

It might be a date coded spring and pin :geek:

Put it on E-Bay

 

[orangedust]

I will probably pull it off this weekend, and cap it, but what is this

for? :scratch:

 

[AdamR]

Get rid of it. Its comman for them to leak.

 

[71Duster]

Its a heat riser, makes for a nice blockage in the stock manifold and when its closed makes exhaust run through the crossover in the intake manifold when its cold better air/fuel mixture=lower emmisions warms up quick etc. But as for performance. The two dont go together.

 

[orangedust]

Thanks, for the updates fellas, I removed a few of these risers
on brand X cars but not on any mopars, just wanted to make
sure thats what its for. 8)

 

[MOPARJ]

I know this reply is about 3 years late..lol...but how would you go about removing this or atleast keeping it open all of the time? My right side manifold on my 318 has one too.

 

[chrisII]

if it still moves its pretty obvious how it comes apart once the manifold is off. if its froze up it shuld be open and will probably not really cause a problem.
I have seen them pluged in various ways. Ive seen little expanshon plugs, like a mini freze plug. Ive seen them drilled and tpped for machene screws (5/16 i think) , others for small pipe plugs. ive even seen the holes welded shut.