in the car cam change

chuck stevens

chuck stevens

Well-known member
I have 8BA in a 40 deluxe and would like to change cams in the car. I would love to hear all your tricks. Oh I don't want to take the heads off, thanks Chuck
 
Not easy to do and lots can go wrong! But, it can be done (even if it is doing it the hard way!).
 
Brian, thanks for the come back, I have more than one flathead so I completely forgot about the 49 cam question. Both of these cars have freshly rebuilt 8BA's and they both have low oil pressure, 5lbs., at idle when warm, sometimes 0. The cams were reground and I think they may have turned the journals. The machine shop replaced the bearings with standard bearings so there could be extra clearance there. It is my fault, for not checking the cam. The engine is totally quiet , no unusual sounds, i have two oil gauges on each of them. I have about 5k on both of them with no changes, thanks for your help, Chuck.
 
Usually when a cam is reground a polishing of the cam bearing journals is done once the lobes are finished. Prior to the decision to use a cam for grinding the cam bearing journal dimension prior to the work should be measured. Fords minimum cam bearing journal dimension is 1.7955 usually a worn cam will measure below this dimension especially on the rear and center bearing location. The proper way to save a cam that measures under the Ford dimension is to grind the bearing surfaces to .010 undersize and of course install the new undersize cam bearings in the block.
Ronnieroadster
 
When I get a camshaft reground, because the grinding operation takes place between centres, I then get the journals ground undersized to fit the measured dia of the newly installed undersized bearings. This ensures perfect concentricity of the cam lobes.
 
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