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money pit bc

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Oliver,BC,Canada
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Darren
Truck Year
1984
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c30
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350
Hi , new owner of a 1984 c30 dually. Gaining to need help and a lottery win !
 

money pit bc

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Location
Oliver,BC,Canada
First Name
Darren
Truck Year
1984
Truck Model
c30
Engine Size
350
Hi , anyone tell me what this little black fitting is and what it does? Looks like part # HRO 15
Any help would be appreciated. Thanks
 

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animal

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AZ Highlander

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welcome from the pine mountains of northern Arizona
 

Turbo4whl

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Jimmy
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Hi , anyone tell me what this little black fitting is and what it does? Looks like part # HRO 15
Any help would be appreciated. Thanks

That is part of a broken thermal vacuum control switch (TVS). The flat piece on the top of the thermostat housing is also what is left of a another TVS.

One will work to help the engine warm up smoothly through several items. The other one is part of the EGR and charcoal can purge controls. This also limits the vacuum to the trans switch if you have an automatic transmission.
 

Mr Clean

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1982
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K10 Extra Cab w/ Proper SWB, & 82 2WD Blazer
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454 BBC, & 383 Stroker
:welcome:
 

WFO

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Welcome from the Texas Panhandle.
 

mrdap

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Welcome!
 

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