deac Posted March 2 Share Posted March 2 Pretty basic question here, I have a stock 40 Super coupe and I notice the radiator cap has seen better days, however it's still functional. I ordered a replacement 7lbs cap from Bobs. Went to install it and it doesn't fit!. At the time I remember that the coil spring area was too thick and would not compress far enough to enable the cap to screw on. The radiator seems like it's the right size and fit. Could be the wrong neck on the radiator? Are Radiator caps not put together like they used to be? There's a website called B-O-P Parts that indicates the model number of the cap should be an R-6; does that sound correct? That website also indicates the R-6 cap is used for all 1940 models What to do? Link to comment Share on other sites More sharing options...
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