Re: 23rd Series 356 Engine Noise

Posted by Owen_Dyneto On 2008/12/12 16:27:17

Valve spring failure, while not unknown, is pretty uncommon in these low-stressed engines. Anything is possible, but I wouldn't discard the old springs or even necessarily assume they were the problem; they are often not replaced even by top-notch engine rebuilders unless tested and found understrength. Over the years there have been occasional bouts of lousy quality replacement springs, I'm thinking back to some years to the double-helix springs for the prewar Eights and Super Eights,; for a period of time most everyone that replaced them had tne new ones break and then were ready to kill for the ones they had just discarded. Test them yourself, or have them tested and if OK, keep them.