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Several years ago I replaced the radiator on my '82 with an aluminum one. Later (still a while ago) I tried to remove the radiator cap and could not get it off. Basically I was lazy and removed a radiator hose to fill the system enough to use the overflow tank. Today I decided to try again to remove the radiator cap and can't get it off. It will move a little but for some reason I can't get enough leverage to push it in and twist at the same time. Probably because I have gotten to weak over the years (old age). Does anybody have any advice or tips or know of a new tool that can be used to get it off? I'm afraid if I try a pipe wrench on it I'll damage the radiator and be in a world of trouble. Thanks!
-Chris
Make sure it is cold, and you relieve the pressure first.
Your scenario is exactly why I use Stant caps with the manual pressure relief valve. The last time I removed a stock cap, I had to use channel-lock pliers. But that did work. Push with one hand, lefty loosey with the other.
The old radiator caps can get stuck sometimes. Try and gently tap on the cap will you are turning it. My old radiator cap was always a pain to remove, so I bought an OEM replacement and it seemed to be easier to remove.