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Heater bypass? |
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billd
Moderator Group Forum Administrator Joined: Jun/27/2007 Location: Iowa Status: Offline Points: 30894 |
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>>So even a half blocked radiator will still cool an engine sufficiently until the engine is put under load.<<
that is exactly how mine acted. It was fine, cool even, until I went from 45 to 65 mph and 5th gear. Then she ran hot,and once it got hot, it didn't really cool until it sat and I started again. Commuting to work at 45 it was good - the lower edge of the green. On the Interstate it went to the top edge of the green. |
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gleamyroof
AMC Fan Joined: Jun/13/2011 Status: Offline Points: 10 |
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so after replacing most of the hoses, the temp sending unit(again), the thermostat, and the rad. cap along with installing a coolant temp gauge I found my problem....I think.
I never noticed it before...or even since I've owned the car, but today I found a very large patch of jb weld on the bottom of the radiator. Not sure if it's leaked before or at all, but it sure leaked today. Cheapest radiator I've found is 348 plus shipping. Looks like Pearl is down for the summer as I got laid off last month and unless I can find a deal on a radiator I'm down and out.... |
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Wrambler
AMC Addicted Joined: Jul/02/2007 Location: West Virginia Status: Offline Points: 4199 |
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Did you price a rad for an Eagle?
Should fit the 660, maybe by swapping brackets side to side or not at all. 90% of AMC's cars take the same basic core and only the tanks and brackets vary |
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Wrambler
69 AMC Rambler 4.0L, 5 speed 2015 Grand Cherokee Limited 2019 Chrysler 300 |
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billd
Moderator Group Forum Administrator Joined: Jun/27/2007 Location: Iowa Status: Offline Points: 30894 |
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Advance auto had the ability to get me one for 200 bucks.
Granted, it's back-ordered now, but they called the manufacturer when my first one leaked and needed to be replaced under warranty and we couldn't find a replacement. Took 2 days. Direct fit, no holes to drill, hoses fit perfectly, screws went in straight, etc. You'd be amazed at how much difference a new, CLEAN radiator would make. And clean means inside - any little layer of anything will impact heat transfer. |
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farna
Supporter of TheAMCForum Moderator Lost Dealership Project Joined: Jul/08/2007 Location: South Carolina Status: Offline Points: 19676 |
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If no radiator shops around to recore it then get the Eagle radiator. Might be simpler to do that and have a shop swap your brackets onto the existing radiator. That could be a welding shop -- the brackets are "silver soldered" onto the metal tanks (not regular plumbing/electrical solder -- "silver solder" is really soft brazing -- takes higher temp than solder, but less than brazing with brass, and strength wise is in between also). You CAN do it at home with a hand torch, but get a MAPP gas bottle instead of propane. Propane might work but you have to heat the material for a long period of time, enough that the heat can get down to the tank seam and cause melting. It's not just the temp, but how long it stays hot too.
There used to be rebuild kits for the Ranco thermostatic heater valves used in the 63-65 Ambo/Classic, but I don't think they are available anymore. I've bought aftermarket replacements, but they seem to fail after 3-5 years regular use -- might last longer in a show car that seldom gets used in winter. I replaced mine with a plain old on/off valve. Works better and won't leak like the thermostatic valve will. I used a generic in-line valve in a heater hose (I think it's a Chrysler valve), but there are some that have a firewall bracket (such as a 64-69 American w/232). A 90s Honda valve will work. Anything that fits the hose and will clamp a cable on will work fine. |
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Frank Swygert
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