In a previous thread the discussion was centered around whether or not a bypass filter is needed and the best oil for our mature engines. Based on that discussion and pondering this topic for a few days after pulling the oil pan I decided to install a spin-on filter on my non-filtered engine. I've seen a couple of photos on the forum of filter installations but decided to offer a more complete tutorial for the benefit of owners who may want to explore a filter installation.
I chose a mount and filter from Wix because they offer a mount and selection of filters that are specifically for bypass operation. Bypass filters are constructed differently from full-flow filters and provide a finer degree of filtration than conventional filters. I sourced the mount and filter from Rock Auto who have not only the filter I use but also the same filter in three additional lengths. I selected the next to shortest due to the confined space around the engine.
Here is the mount, part number WIX 24755:
Note the arrows indicating the proper direction of flow. This mount is only for bypass installations and has a small 5/8" nipple instead of the more common 3/4" seen on full-flow installations. It also has 1/8" NPT threads that allow 3/16" steel brake lines to be attached with only one 90* adapter.
The filter is WIX 51051:
The other Wix bypass filters that fit this mount are 51050, 51320, and 51704.
A bracket must be fabricated to attach the mount to the engine block. I used 1/8" steel and drilled it for the mount and two studs on the engine head:
The two fittings on the engine accept 3/16" brake lines with no modification. I found 12" lines to be ideal for this installation. Accessing the fittings and getting the threads straight deep in the engine compartment is kinda tedious....just consider it a character-building experience. Permatex #2 (non-hardening) gasket sealer was used on the brass fitting where they screwed in the filter mount. I've seen teflon tape used in situations like this but that is risky in oil systems unless you really know what you are doing. A small sliver of tape that breaks loose can create havoc if it plugs an oil passage.
A couple of thick washers are behind the bracket to provide clearance for the heads of the bolts securing the filter mount. The threads in the cylinder head are common 3/8" and the nuts on the studs are 3/8" fine thread. One of the studs backed out so I replaced it with a bolt.
Prior to installing the filter I filled it with oil. This photo shows the difference between a bypass filter and full-flow---notice the tiny holes through which oil flows in/out of the filter. Filling the filter was very tedious....if I had to do this very often I would rig up some sort of syringe to push oil into the filter instead of spending 1/2 hour adding oil a fraction of an ounce at a time. The filter accepted a cupful of oil before it was satisfied.
The finished installation complete with a note on the mileage and date of filter change. The oil lines need to be formed for clearance so the filter can be easily changed.
Yes, this is not for those who want a period-correct engine bay, but I like having a modern filter which can be easily sourced through common channels. If my engine is happy....I'm happy.