Guest 61xlch Posted September 30, 2012 Share Posted September 30, 2012 Hello engine specialists,my camshaft is slightly worn and I would like to have it regrinded. The rollers of the rocker arms are pitted too, but still within measurements. Could this become a problem with the regrinded camshaft?The rollers are not removable, because the roller shafts are conical widened at the ends. Any suggestions for renewing these rollers?ThanksAndreas Link to comment Share on other sites More sharing options...
NTX5467 Posted September 30, 2012 Share Posted September 30, 2012 In general, when a camshaft is "reground", this procedure involves removing enough metal to get to "fresh" metal for the wear surface. If there's any intermediary link between the camshaft followers and the rocker arms, such metal removal can need to be compensated for with adjustments to the pushrods or rocker arms. In earlier times, such regriding was done to get more valve lift and a little more duration due to the fact the valve lobes' "base circle" would be reduced.Usually, at least in "flat tappet" situations, it would also be necessary to add some sort of surface hardening treatment to the camshaft lobes. Parkerizing was one such process, but I'm not sure if that would be needed for the material your camshaft is made from or with the particular type of lifters which are actuated by the lobes. It appears that any adjustments at the rocker arm location would be done with the "pads" on the non-roller end?What type of engine are these parts from?Just some random thoughts,NTX5467 Link to comment Share on other sites More sharing options...
Guest 61xlch Posted October 1, 2012 Share Posted October 1, 2012 It appears that any adjustments at the rocker arm location would be done with the "pads" on the non-roller end?What type of engine are these parts from?NTX5467Its a 23 Duesenberg A with OHC-engine. Yes, the valve adjustment is made by adjusting screws at the opposite end of the rocker arms.The camshaft is bored hollow and pretty light. Its no cast iron and shoud be a high grade material in these days. But nobody knows if it should or even could be hardened after regrinding. And I am not shure if I have to renew the rollers, because I am not going to run this car 50000 miles plus. Renewing the rollers means making everything new from the sketchboard. Lots of $....RegardsAndreas Link to comment Share on other sites More sharing options...
Rusty_OToole Posted October 2, 2012 Share Posted October 2, 2012 Randy Ema of California is the Duesenberg expert. He can help if anyone can.A sample of his work: Link to comment Share on other sites More sharing options...
Guest 61xlch Posted October 2, 2012 Share Posted October 2, 2012 Randy Ema of California is the Duesenberg expert. He can help if anyone can.Thanks, I know Randy (and the Leno-video of course) , I will shot him a mail.Most Duesenberg people are in the model J. The model A is pretty unknown and underrated (to me). Link to comment Share on other sites More sharing options...
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