AL1630

I might have to pull out a core plug sometime. What makes me worried it's a bigger issue than dirty cooling passages is that the engine runs ok, not great, and only gets about half the MPGs it's supposed to. I tried tuning some stuff and got it from 10 to 13 mpg, but last time i filled up it dropped back to 10. The car is supposed to get at least high teens/low 20s for mileage. Could these 2 problems be related or caused by the same issue?

When I pulled off the water pump, it looked clean and I couldn't feel any rust or gunk buildup when i poked around again. Of course, there could be more hiding in the block. I might have to try the temperature gun if I can find one. All my hoses are just a few months old, I would hope they aren't the problem.

195 is in the middle, the factory service manual says that's the stock thermostat temperature. I'm fairly certain the gauge works, on a cold morning it warms up more slowly than a hot day, but i haven't tested with a thermometer. The radiator doesn't seem to have foam in it and the oil isn't milky. Rad cap is working ok, it was new with the radiator and holds pressure.

I was able to borrow a vacuum pump from a neighbor, and the vac advance seems to be working. It's just a generic aluminum one. It didn't have a radiator when I got it as it had been sitting for a long time. I replaced the head gasket already, hopefully that's not the issue.

I haven't been able to test it. You need a hand vacuum pump to test it, right? My local parts stores don't have one to rent. Is there a different way, or do I need to buy a pump?

No clutch, the fan is always driven when the engine is running.

I tested it in a pot on the stove before installing it, and it opened at 195 degrees (Stock temperature). I had it in with the pointed end facing toward the radiator, which i assume is correct? What's strange to me is that this issue persists even with no thermostat when it's relatively cool outside.

Hi all, I've been fighting a somewhat strange overheating issue on my 1963 Rambler American, OHV inline 6. When sitting in traffic, the temp gauge begins to climb. Once I get up to 35-45MPH, the temp drops back down into the middle again and seems to stay there, but if I go faster, say 55-60, the gauge begins to climb again, and will go all the way to the top. These issues seem to happen with any outside temperature, but happen much faster if it's hot outside. The car has a brand new 2 row aluminum radiator New water pump flushed the system with Evapo-Rust, it now seems clean inside. I've tried using a thermostat vs no thermostat vs just the restrictor plate, none seem to make much difference So, has anyone seen something like this before or have any ideas to fix this?

By the way, if you have a mac, firefox and an ad blocker will work fine as well. The directions are pretty much the same as on a PC. I like Ublock Origin, what @Locomobile suggested.

Searching for the 'Federal Rubber Company', I found record of a major tire maker with that name that operated in Wisconsin in the 1920s and 30s. Not definite evidence, but it suggests that you could have an original tire. https://collections.lib.uwm.edu/digital/collection/mke-polonia/id/32460/ https://milwaukeehistory.net/wp-content/uploads/2018/04/3065.Federal-Rubber-Co.pdf

I think the millennial generation ended in the late 1990s, your grandson is a member of "Generation Z"

Have you joined The AMC Forum? There are lots more posters on that forum than on this forum's AMC board, and they might be able to track one down for you. You could also ask around at some of the Rambler parts vendors, they tend to have have hard to find parts. The main ones are Galvin's AMC, Blaser Auto, Kennedy American, and American Parts depot.