I know that early engines had CI bushings for the cam...later engines had ???
what are people using successfully?
I am not partial to installing brass...
Thanks in advance...scott
Scott I use Z bronze
Most original blocks I have seen had steel bushing at the rear of the camshaft. I know the 15 did for sure, as I reworked it when I added the VW oil pump. Most suppliers provide a bronze replacement.
Scott, make them out of old triple gear bushings.
We have been doing that for 50 years.
Most early blocks, as I recall had a bronze bushing in the rear, but yes the early front and center cam bearings were cast iron without a babbit liner. Later rear bushing were cast iron. Herm's solution is a good one.
The engine I'm doing had a steel bushing in it, with no notch or groove to channel oil. I assumed it was a replacement. Would the original bush have been thus, or would it have been notched and grooved?
FYI- subject engine: This was a barn find that ran great when started after many years, but found it to have a blown up flywheel when I inspected as to why the mag didn't work...was a miracle it ran as well as it did (about an hour before retiring it again waiting for this inspection/refurb). Crank is like new, bores are standard with aluminum pistons...only .002 out of round/taper in cylinders. Cam bushing and bearings have enough wear to warrant replacement. This is why I'm asking this question...
I appreciate all the responses...
Most, if not all the engines I've done had a the cast rear bushing with the oil groove & notch with the exception of a couple early blocks '10-'15 - sounds like a replacement bushing.
Follow Herm's suggestion of triple gear bushing. Once reamed up to fit the cam you will still have enough oil grove remaining. I also drill a oil hole at the top of the bushing and using a larger dill bit, form a countersink which collects oil.