PDA

View Full Version : Partial Flow Oil Filters



jcarmichael
03-20-2006, 01:11 PM
I removed my oil filter on my 1961 Lark 259 CDI engine as the lines were leaking and I want to clean the engine but found the lines were made up from rubber and the fittings were only about 3/32 inch inside diameter. I don't think this would be factory correct and seems too small to allow enough oil flow to make any difference cleaning the oil. I plugged the holes for now but does anyone know the proper set up for this filter?

1961 Lark

N8N
03-20-2006, 01:16 PM
The lines may have closed up some due to age and swelling, but they don't need to be big, there's very little flow through a partial flow filter, by design. There should be at least one fitting with a small, drilled orifice to limit oil flow. If a larger volume of oil flowed through it you would notice a drop in engine oil pressure.

nate

--
55 Commander Starlight
62 Daytona hardtop
http://home.comcast.net/~njnagel

jcarmichael
03-20-2006, 02:37 PM
Thanks I think I might just leave it off for now and change oil every 1,000 miles.

1961 Lark

Mike Van Veghten
03-20-2006, 03:19 PM
That's what I did. It'd take about 2000 miles of constant driving to fully filter what's in the pan...one time.

As you (jcarmichael) say, just change the oil about every 1500 miles, that's my interaval anyway.

N8N
03-20-2006, 07:02 PM
I like the partial flow filters, I have been told that it really only takes about seven times as long for all the oil to go through the partial flow filter as it would to go through the full flow filter. The advantage is the partial flow theoretically can filter out finer particles. That's the whole reasoning behind stuff like the "Frantz" TP filters etc. They seem to have been given a "crackpot" reputation but from what I've heard (never tried one myself) they might actually offer some benefit.

nate

--
55 Commander Starlight
62 Daytona hardtop
http://home.comcast.net/~njnagel

jcarmichael
03-20-2006, 07:08 PM
One other thought is how do you even change the filter without spilling oil all over the engine?

1961 Lark

N8N
03-20-2006, 07:45 PM
you don't :)

I prefer the earlier, replaceable-element filters that have the little cartridge, much less messy to change (although you have to siphon out the oil from the housing to do a 100% complete oil change... win some, lose some.)

Seriously if you punch a hole or two in the top of the filter while draining the oil pan, it will help encourage all the oil to drain out of the filter and back into the engine. However, it will still make a mess unless you stuff a rag underneath it.

nate

--
55 Commander Starlight
62 Daytona hardtop
http://home.comcast.net/~njnagel