what's this thing?
what's this thing?
Hey guys. I need to replace the 'thingy' where the hose breaks off to go to the heater core (2 big hoses) and the AC. It's a vacuum controlled valve (looks plastic) and sits on top of the passenger side valve cover. Kind of just lays there on top. The bottom of it cracked a piece off when I dropped it against the valve cover...Anybody know what this is? I have a 305 tbi (92 rs). I tried to find a pik on here of it but no such luck. Unfortunately it seems to spray a bit with the heat on...and it's a little cold here so..lol. Let me know.
Jay
Jay
Senior Member
Joined: Jan 2003
Posts: 777
Likes: 0
From: NJ
Car: 1988 Trans Am
Engine: 305 TBI
Transmission: th700R4
mine broke too and i replacet it with one of those help parts haha stupis little plastic piece and my vacume line thing broke off mine but i havent had any problems so far
Member
Joined: Oct 2002
Posts: 334
Likes: 0
From: Gurnee, IL
Car: '86 IROC
Engine: 305 LG4 awaiting the crate Vortec 350
Transmission: 700R4
Originally posted by TransAmTBI
mine broke too and i replacet it with one of those help parts haha stupis little plastic piece and my vacume line thing broke off mine but i havent had any problems so far
mine broke too and i replacet it with one of those help parts haha stupis little plastic piece and my vacume line thing broke off mine but i havent had any problems so far
Senior Member
Joined: Dec 2001
Posts: 652
Likes: 0
From: Pahrump, Nv
Car: 1991 z28
Engine: l98
Transmission: 700r4
pepboys carries them, just ask for a heater control valve for year make model, ect. its like 7 bux, i had to replace mine 2 yrs ago, hose connector just snapped off. prolly from fatigue
Joined: Mar 2002
Posts: 587
Likes: 1
From: middle TENNESSEE
Car: 1989 Iroc rebuild
Engine: 355 carb'd
Transmission: 5spd
Axle/Gears: 3:08 pos for a while
good to have a..
spare,when they crack apart they will throw coolant everywhere,the one on my 88 firebird broke while driving in town traffic,got one at autozone,i have a extra i carry in the IROC,just in case!!
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Junior Member
Joined: Jun 2001
Posts: 9
Likes: 0
From: westcoast,norway
Car: 84`iroc-z
Engine: 350 tpi
Transmission: th700-r4

Hey folks!
by the way,
After a engine swap i have lost the
vacuumline hose routing from the top of
heat.controlvalve.
anyone just go out looking for me???
Does it go to the plenum or what??
Thanks.
Joined: Jul 2001
Posts: 581
Likes: 0
From: Leesburg, VA
Car: 1988 Camaro Sport Coupe
Engine: 2.8L V6
Transmission: 700R4
I hate the stupid heater valve because it does nothing but leak around the one hose when it's FREEZING cold. I replaced it with a new one back a few months ago and when it gets cold like the 20's and below the hose says lets drip a lot of coolant. I suppose the one hose should be replaced even though I did that a two years ago.
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Jan 13, 2024 12:29 PM




just a few spelling errors, i know i do it all the time. 

