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money pit bc

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Nov 25, 2022
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Location
Oliver,BC,Canada
First Name
Darren
Truck Year
1984
Truck Model
c30
Engine Size
350
Hi , new owner of a 1984 c30 dually. Gaining to need help and a lottery win !
 

money pit bc

Junior Member
Joined
Nov 25, 2022
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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

Super Moderator
Staff member
Super Moderator
Joined
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Location
Georgia
First Name
Lee
Truck Year
1986
Truck Model
c10 silverado
Engine Size
350ish
:welcome:
 

AZ Highlander

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Location
Prescott AZ
First Name
Frank
Truck Year
1987
Truck Model
K15 (aka V1500)
Engine Size
350 (5.7L)
welcome from the pine mountains of northern Arizona
 

Turbo4whl

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Supporting Member
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Location
Downingtown, PA
First Name
Wayne
Truck Year
1974
Truck Model
Jimmy
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

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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Location
North East Texas
First Name
Shawn
Truck Year
1982 & 1985
Truck Model
K10 Extra Cab w/ Proper SWB, & 85 K5 Blazer
Engine Size
454 BBC, & 383 Stroker
:welcome:
 

WFO

Full Access Member
Joined
Jan 6, 2017
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Location
Texas Panhandle
First Name
Dan
Truck Year
1986
Truck Model
K20
Engine Size
350
Welcome from the Texas Panhandle.
 

mrdap

Full Access Member
Joined
Jul 15, 2012
Posts
183
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Location
USA
First Name
C/K_Lover
Truck Year
81-91
Truck Model
C20/K30/V15/V2500
Engine Size
350/454
Welcome!
 

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