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Thread: heater core hose fitting

  1. #1
    Join Date
    May 2009
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    hot & windy
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    heater core hose fitting

    anybody happen to know the part # for the heater hose fitting on the firewall? i have to replace the return side (driver's side). when i was running the 1/8th on Fri, i somehow blew the sucker off! the bung that the hose fits over/clamps to is broken off inside the hose.

    i've got a temp fix for now so i can at least drive around. i just pulled the return hose out & looped the feed hose back around into the other side of the water pump. so far it ain't kinked on me, & temps have been normal (since i filled the reservoir back up). i reckon it'll work til i get it fixed & thank God it's almost summer, so i won't need the heater for a while.

    on that note, can i still use the A/C with the heater core bypassed like this? and also, it's unrelated (because it's been doing this for months), but whenever the temp selector is all the way cold (i have the manual HVAC standard on a 99 NBS) regardless of fan speed/off or dash/feet/defrost, i have this slightly thumping kind of clicking noise coming from behind the dash. if i turn the temp one click warmer, it goes away. what's causing this?
    00 FRC - just top end, exhaust, and a hot-air intake
    99 Sierra - 5.3 / 5spd
    ↓ click the pic for the build ↓

  2. #2
    Join Date
    May 2009
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    this one - for the visual people

    hose.jpg
    00 FRC - just top end, exhaust, and a hot-air intake
    99 Sierra - 5.3 / 5spd
    ↓ click the pic for the build ↓

  3. #3
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    nothin... really?!
    00 FRC - just top end, exhaust, and a hot-air intake
    99 Sierra - 5.3 / 5spd
    ↓ click the pic for the build ↓

  4. #4
    Join Date
    Dec 2008
    Location
    san antonio TX
    Posts
    1,365
    i broke the fitting once by removing the intake mainfold, i didnt find the fitting, i had enough slack in the hose i just put it on direct on the heater core with a clamp.
    Last edited by lechez71; 05-09-2011 at 04:27 PM.
    1982 c10 lsx swaped, NP tuned, true duals, 4:11s, trutrac, e-fans, CAI

  5. #5
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    May 2009
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    well i ended up finding a fitting on rockauto for less than $4, so i went ahead & got it. i'm more interested in answers to the last 2 questions
    00 FRC - just top end, exhaust, and a hot-air intake
    99 Sierra - 5.3 / 5spd
    ↓ click the pic for the build ↓

  6. #6
    Join Date
    Sep 2007
    Location
    Broken Bow, OK
    Posts
    1,434
    One of your encoder motors has a bad spot in it. At full sweep it is skipping gears causing the clicking.

  7. #7
    I got my heater core hose fitting from orielly. It was cheap best i remember
    01 GMC Sierra 1500 4.8 auto. CAI is all the help she has. 300k miles and counting

  8. #8
    Join Date
    Oct 2003
    Location
    Houston
    Posts
    209
    I got my fitting at orielly also. They had it in stock.
    99 Pewter SCSB
    DJM 4/6 drop, Hotchkis front/reat swaybars,Hypertech power programer, milled & built heads, Accel wires, distributer,coil, Mass Air Flow Sensor(mti motor sports, Granatelli),Dynomax UltraFlow Stainless, 17x8.5 Eagle Alloys, Escalade door handles, Suburban front grille, with clear corners and billet bowtie,Street Scene mirrors, Cowl Hood

  9. #9
    Join Date
    May 2009
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    yeah, i got the connectors already. i'm just now concerned with how to fix the motor-gear-skip issue
    00 FRC - just top end, exhaust, and a hot-air intake
    99 Sierra - 5.3 / 5spd
    ↓ click the pic for the build ↓

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