Name That Part

[syndicate1]

Can anyone name the original part attached to drivers side exhaust manifold/collector? And what’s it for?

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[rydog1130]

Not sure what its called but my "guess" would be it maybe connected to the end of the air filter intake housing allowing it to open once it hit a certain temp... who knows....anyone else ????:??:?

 

[bronkenn]

Heat riser I do believe.

 

[spap]

Muffler Bearing

 

[Viperwolf1]

I'm going to call it Rusty.

 

[Dude 713]

How about Heat riser valve.

 

[rguest3]

Ahhh, the Muffler Bearing

 

[syndicate1]

I'm going to call it Rusty.

Haha!


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[Rightpace]

Thermostatic exhaust valve. Always heard them called butterfly valves. Bad about locking up closed, most people removed them and replaced with a spacer, seen them welded open to get rid of rattle in the late 70s and early 80s

 

[syndicate1]

Thermostatic exhaust valve. Always heard them called butterfly valves. Bad about locking up closed, most people removed them and replaced with a spacer, seen them welded open to get rid of rattle in the late 70s and early 80s

This one moves freely, thankfully it’s not locked up closed.


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[mtp71174]

the purpose was to divert hot gasses through the center of the manifold at start up and when exhaust temp rises the butterfly would open up. quicker and higher engine temp helps emissions

 

[sprdv1]

I'm going to call it Rusty.

LOL right..

 

[Ovalis]

That version was used for 73-74. 75-77 version was vacuum operated hence the addition of the second PVS on the heater elbow outlet. For 77, the PVS was moved to the back of the intake manifold and obviously that manifold allowed coolant to flow at the back of the manifold.

 

[Slowleak]

My ‘77 does not have one and there is nothing I can find in the Ford manual about it.