I have a bad radiator cap and local dealers are out, rally is in 2days. Does anyone know if I can get one at auto parts store. I know it has to be 1.1 bar (16 psi).
You have two things to look for - pressure and fit. Aftermarket caps tend not to fit - I think the plunger/spring are generally too deep (from memory) for the Rocket radiator. Either take yours in or check fit before buying one.