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Best AMC Radiator? |
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Intense Blue AMX
AMC Apprentice Joined: Jan/19/2011 Location: michigan Status: Offline Points: 136 |
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Here's another very good source. |
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bigbad69
Supporter of TheAMCForum Joined: Jul/02/2007 Location: Ottawa, Ont. Status: Offline Points: 6685 |
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That's a lot less likely to happen with a welded aluminum rad - but not impossible.
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69 Javelin SST BBO 390 T10
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farna
Supporter of TheAMCForum Moderator Lost Dealership Project Joined: Jul/08/2007 Location: South Carolina Status: Offline Points: 19686 |
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A better fitting shroud would definitely help. Unless you're getting top notch (rather pricey!) aftermarket fans like Spal or Derale, it's a crap shoot. Most of the cheaper fans have cfm ratings in "clear air" -- nothing in front of them. So it will pull 1200 cfm (or whatever, just pulling a number out of my... hat) for sure, but stick it in front of something that resists air flow (like a radiator!) and it may only pull half that much. I tried a pair of 12" aftermarket fans and they would cool my hopped up 4.0L fine -- until the AC was turned on without outside temps over 90. Could run AC going down the road, but after 10 minutes of low speed (under about 45) driving the temp would start to rise -- only 2-3 minutes sitting in traffic. Once engine temp reached 230 I cut the AC off, and it would take 15 minutes of highway driving to get it back down to 200 (195 stat). It wouldn't drop much if sitting in traffic, but wouldn't get hotter. Switched to a Contour fan and I can now run AC at any time! OEM fans and replacements (a new aftermarket 95-00 Contour V6 replacement dual fan/shroud is under $125!!) work so much better than aftermarket fans. I have both my fans running wide open all the time. I need to step the thermostats to run them at half speed (Contour setup uses a big resistor to drop voltage -- not included with replacement fans) and kick up at say 210. They are a bit loud running high speed all the time -- most noticeable when the engine shuts off and fans are still running until thermo switch cools (2-5 minutes).
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Frank Swygert
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70,71,72 AMXS
AMC Nut Joined: Oct/01/2008 Location: Ohio Status: Offline Points: 340 |
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What he said... I fought overheating limousines back when they were still running mechanical fans. I bought adjustable mounts for the fans, to place the blades half in and half out of the shroud. It cured the overheating at idle issues we were having.
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Bruce in NW Ohio
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Rebel Machine
AMC Addicted Joined: Jul/03/2007 Location: Western Il Status: Offline Points: 5121 |
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I removed the fan shroud and took a look at the fan to radiator clearance. At the bottom it's a touch under 1/2 inch which isn't a lot but that bump must have really rattled the radiator for it to get into the fan. From what I can tell one of the fan blades got into the lower tank weld and bent the leading edge out causing that blade to continue to scrape away at the tank weld. Moments later that same blade hit the tank just right to bend it out even further, enough to get into the core. The noises it made agree with this. You can see the gashes in the welds. I've got an new fan and one of the American Eagle 2-row HD radiators on order (Jeg's says it'll ship on the 27th but I'd bet that's not certain). I'll probably gusset the radiator mounts to make it more rigid so this won't happen again. -Steve- |
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Hurst390
AMC Addicted Joined: Apr/20/2008 Location: secret Status: Offline Points: 5822 |
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Coming in late it looks like the radiator brand you have has done its job. The problem is the fan too close and stuff moving around. I would at the minimum shorten your fan spacer and change back to an AMC fan. I'll give you one if you need one. The fan shroud edge should be the middle of the fan blade centerline looking down.
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SC/Hurst Rambler
11.62 120 100% Street Legal |
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RandyB
AMC Nut Joined: Aug/04/2020 Location: Florida Status: Offline Points: 462 |
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I just bought Cold Case RAD-AMC100AK from Summit for my 68 Jav 343, it comes with 2 electric fans which I am going to run off my sniper EFI.
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Randy B
68 Javelin SST 343 73 Charger Rallye 340 triple Blk |
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73hornut
AMC Addicted Joined: Jul/03/2007 Location: Southern Oregon Status: Offline Points: 3130 |
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I am now 4 years running used junkyard contour fans, on a 3 core aluminum radiator, in a mild 401/auto with a/c gremlin. Doesn't miss a beat.
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71 Javelin
74 Gremlin 79 Spirit AMX Rogue Valley Rumblers Like Us on FB https://www.facebook.com/groups/1602825606650796 |
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farna
Supporter of TheAMCForum Moderator Lost Dealership Project Joined: Jul/08/2007 Location: South Carolina Status: Offline Points: 19686 |
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If not electric fans, try one of the Flex-A-Lite nylon fans. Wouldn't damage the radiator as much if it hit and edge, definitely wouldn't bend a blade! Rated for up to 8,000 rpm. |
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Frank Swygert
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Heavy 488
AMC Addicted Joined: Apr/27/2019 Location: In the Status: Offline Points: 3557 |
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Heres the plastic fan.
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