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70 heater flow control valve 4Seasons part # 74682 |
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White70JavelinSST
Supporter of TheAMCForum Joined: Aug/08/2012 Location: Minnesota Status: Offline Points: 4867 |
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Posted: Oct/05/2022 at 6:38pm |
I recently purchased one of these from Rock Auto, for $44.89 It arrived after a delay from DHL. I checked it over, only to discover that it only opened to about 1/3. Has any one else seen this? I sent it back. Now I'm waiting for the replacement. Fearing it will be the same. It was manufactured in Mexico. It was anodized the correct color. Just a few short years ago I bought the same thing, with correct function, from Amazon for $17.
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70 Javelin SST, second owner, purchased 1972
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sweatlock
AMC Addicted Joined: Apr/28/2014 Location: Largo, FL Status: Offline Points: 3285 |
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Well, they do still have them on Amazon:
I’d say the crazy price increase is due primarily to the recent crazy inflation. I’m just glad they’re still available - a few years from now $50 will seem cheap. And the same valve from the AMC parts vendors is $25 more.
Edited by sweatlock - Oct/05/2022 at 7:40pm |
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n2ojoe
AMC Addicted Joined: May/04/2016 Location: Tecumseh, MI Status: Offline Points: 718 |
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I have 2 on the shelf here that I bought from Summit years back. I opened the boxes to check, and they too only uncover about 1/3 of the passage inside.
I can say that the one I have installed on my 70 AMX does put out good heat, though it doesn't get driven in very cold weather.
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JGRANTAMX
AMC Addicted Joined: Jun/02/2017 Location: Maine Status: Offline Points: 1663 |
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I read somewhere recently possibly on FB where someone mentioned the water valve is not supposed to open fully, if anyone has an original or NOS for comparison it would be interesting see how far they open.
J |
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sweatlock
AMC Addicted Joined: Apr/28/2014 Location: Largo, FL Status: Offline Points: 3285 |
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It could be designed that way to restrict flow so as not to pop the heater core. Later engines have a separate flow restrictor in addition to the heater valve - my ‘92 Firebird SBC 305 V8 has a separate flow restrictor in the LH head in addition to the vacuum-controlled heater valve. I know, because I had to replace the restrictor since it had corroded.
Edited by sweatlock - Oct/07/2022 at 9:58am |
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ramblinrev
Moderator Group Joined: Dec/28/2008 Location: Wisconsin Status: Offline Points: 11470 |
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I think that is correct! I have an NOS one I can dig out and check.
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74 Hornet Hatchback X twins (since 1977)
62 American Convertible (still worth the $50 I spent in 1973!) AMCRC #513, AMO #384 70 AMX 360 4-speed (since 1981) |
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White70JavelinSST
Supporter of TheAMCForum Joined: Aug/08/2012 Location: Minnesota Status: Offline Points: 4867 |
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OK, I couldn't take it any longer. I did it. I removed the Amazon valve. I did install the Amazon control valve I bought several years back on the White70JavelinSST a couple weeks ago as the old one (original) wouldn't close anymore. I had to shred the original one to remove it. I had to break off the top and get a socket on the hex to turn it out. An open end wrench would not work at all. So I have a toasted original and a new one installed on the engine. I took the new one back off today and looked inside it as I moved the lever back and forth. It only opens 1/3 as well. I'm Sorry RockAuto, I should not have returned the valve, it's not defective. I believe the valve is designed to only open 1/3. I did operate the heater a couple times and it blows screaming hot air with only 1/3 opening. Guess I should have just kept my mouth shut and did my own research. Thanks for the responses.
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70 Javelin SST, second owner, purchased 1972
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6PakBee
Supporter of TheAMCForum Charter Member Joined: Jul/01/2007 Location: North Dakota Status: Online Points: 5454 |
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Don't beat yourself up. Minnesota is like ND, in the winter you want a heater to WORK. Your concern was not misplaced IMHO.
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Roger Gazur
1969 'B' Scheme SC/Rambler 1970 RWB 4-spd Machine 1970 Sonic Silver auto AMX All project cars. Forum Cockroach |
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White70JavelinSST
Supporter of TheAMCForum Joined: Aug/08/2012 Location: Minnesota Status: Offline Points: 4867 |
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Thanks 6PakBee, I appreciate your response |
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70 Javelin SST, second owner, purchased 1972
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