Re: 1929 - 30 restore camshaft journals and bearings with to much waer

Posted by 32model901 On 2011/5/18 19:22:57

2470Packard,

I had the same problem with excess cam bearing journal clearance on a '32. I ended up having the cam journals metal sprayed then ground back. The cam bearings in the block were machined to give the correct oil clearance.

The shop that did the work was:http://deltacam.com/services.php?p=2

They also checked the cam for straightness and reground the cam lobes. Have the shop you select check for run-out of the base circle of each cam lobe to the cam bearing journals.

If the place you take your camshaft to doesn't know how to check this I'd advise finding some place else.

The long camshaft in the straight 8's can have individual cam lobes bent off center. The cam journals may be inline but you can have one or more cam lobes off center.

I speak from experience on this, I had to pull an engine apart to remove the cam after my "expert" machine shop told me the camshaft was checked for straightness and was OK.

All they did was check the journals, not each cam lobe. After three months of trying to diagnose a bad running engine I put a drop indicator on each of the cam lobes and rotated the cam in the engine. What I saw was .010 run-out of the base circle of the cam. This told me a few of the lobes were bent off center.

Regards,

Dave