I bought some NOS Wassell M.D. 32H Dural push rods for my Commando build and they are solid one peice aluminum. They have no steel end caps, both rocker and lifter mating surfaces will be in direct contact with their respective aluminum bussiness end.
Never seen this before, as all other Wassel and other aftermarket pushrods i've had experience with had some form of steel tip. The instructions mention that both rocker and lifter surfaces should be highley polished (no brainer there) Anyone heard any horror stories or positive experiances with this particular type?
I suspect that they are solid ally with a minor diameter which is less than the stock pushrods ? If so I have seen these for Triumphs and would not consider using them, tube has greater rigidity than [solid] rod of equal diameter, and using smaller diameter rod is asking for pushrod flex. I know enough of the dynamics of valve trains to understand that I actually know bugger all. You could end up with an ugly harmonic / resonant frequency problem that could either tangle valves or maybe have a valve meet a piston if you miss a gear. If they were branded Harman & Collins or similar I would not be as concerned.
1969 TR6R 7.62 x 51 is not a maths puzzle.
Re: Questions about Wassell Aluminum Push rods#65085 04/30/069:45 am04/30/069:45 am
I have'nt measured them against the stock pushrods yet, but my initial guess would be that they are less in diameter. What i'm really sceptical about is how well they would wear. Seems I might be adj. valve clearance every 500-1000 mi maybe. Thanks for the info
Re: Questions about Wassell Aluminum Push rods#65086 04/30/061:08 pm04/30/061:08 pm
Hi,78AMIgrad I have recently fitted some offset rocker buttons to my A65 and was suprised that they were made from alloy, however they work and I expect they will last, aluminium is not a bad bearing surface. At the same time I fitted a set of Chrome/molly pushrods which I made up by putting the std tips from the old alloy ones onto some ford aftermarket pushrods that I shortened and turned down on the ends slightly. They are a little heavier but the motor is quieter and revs just as well, the std valve springs seem quite able to control the extra weight up to the RPM limit I use 7,500, being that I'm using a longer stroke Norton crank. With std cam and big (slightly heavier valves), std valve gear & p/rods, my sons A65 was fine to 9,000RPM plus. Putting one end of the std pushrod on the table I could push it with my hand in the middle and obtain noticable flex, but not with the C/molly.
Re: Questions about Wassell Aluminum Push rods#65087 04/30/067:29 pm04/30/067:29 pm
Thanks for the comeback Mark, don't think I will be making my own pushrods anytime soon, but good to hear you are'nt intimmidated by it and it worked out for you
I did pull up an old conversation from here on google, where John Healy mentions these very pushrods. And John Healy if you are lurking this post please pipe in with any added experience you have with these Wassell Dural pushrods