what a heat stove or heat shield?

[94ranger#22]

I took my truck to get smogged yesterday and the guy was a dck and said i dnt have a heat stove on the headers or something? and all the auto parts stores say they cant get them. anyone got pics of one so i could make one? Thanks

 

[Mudhound]

Simply go find a early inj. engine in the junkyard, remove the little plate that has the short piece of tube sticking up from it for the hose, and hose clamp it/spot weld it to your headers. Get a replacement hose to connect the stub to your airfilter housing, and done. The ones on the older Jeep Cherokee 4.0 work well, along with ( better sit down ) the ones from the older TBI GMs.

 

[heptofite]

go somewhere else?

 

[94ranger#22]

ended up going to pick n pull and got one off an explorer for 15 bucks and it passsed smog

 

[adsm08]

I'm still not sure what part we are talking about here. Heat Stove?

 

[TheTopher]

+1


Did you have to bake cookies under your hood in your "heat stove" for the emissions guy to pass you or something?

 

[adsm08]

Rofl!

 

[lil_Blue_Ford]

might be referring to the plate on some of the older trucks on one of the exhaust manifolds with a hose to the airbox, the idea was to grab warm air coming off the headers and flow it into the motor so it warms up faster

 

[adsm08]

Oh, those things!!!! Kind of an evolution on the choke stove.

I didn't think they ever put them on 4.0s. Weren't they only mildly effective anyway?

 

[lil_Blue_Ford]

Yes and yes...

I have seen two 4.0L motors with them. Mostly early 4.0L motors that I've seen them on.

And yes, they tended to be next to worthless. But a picky emissions inspection station would be looking for it.

 

[AllanD]

I've got one on my 4.0... a 1993.

I took great pains to keep everything complete.

AD

 

[snomaker321]

so its like... a really hot air intake?

and i was under the impression you wanted cold air.

 

[lil_Blue_Ford]

so its like... a really hot air intake?

and i was under the impression you wanted cold air.

There's supposed to be a lil flapper on the air box that is supposed to shut off the flow of warm air off the manifold after the motor has warmed up. Or so I've been told. I know the flapper is there and there is vacuum lines run to it, but I'm not sure if it only works in theory or not.

Cold air is denser than warm air, thus why it's wanted for combustion once the motor is warmed up, you get a lil more air in each cyl that way. Or so goes the claim. Air is going to warm up as it travels through the intake anyway.

 

[AllanD]

Usually the flapper thing fails delivering cold air only

It takes engine vacuum to pull it "open" to allow hot air in so it doesn't do
much except at idle with cold weather.

IF you've ever had an iced throttle body you'd understand...

AD

 

[snomaker321]

alright makes more sense now. i didnt realize it shut off