Oil Filter Plumbing

nopdog

VIP MEMBER
Joined
Apr 24, 2017
Messages
358
Country flag
What’s the best way to plumb/route in an oil filter. Feed line or return line.
It’s a 71 Commando 750
Thanks
 
If fitted to the feed side of the pump, it could negatively affect flow, or pressure, or both.

So the return is best.

Some people get hung up on the fact you‘re filtering oil on the way out, rather than in, to the engine. But, unless you add contamination into your oil tank, it does not matter where the filter is located in the circuit. In fact, if contaminants are created in the engine, then catching them ASAP is best as it keeps the rest of the system clean.
 
Oil pump is a gear pump also known as a positive displacement pump. It pushes oil much better than sucking oil so any filter needs to be on the push side of the pump. Hence without major replumbing needed on the feedside it best fitted to the return side where the pipe is in the push side of the return pump.
 
Last edited:
What's the consensous on retaining the stock mesh screen when fitting an oil filter?
 
I added magnetic oil tank drain plug
But that does jack all really...as the filter should catch most contaminates
 
Wasn't it a "past" parts manual circulation diagram that was incorrect and.....
Not the workshop manual....certainly not mind anyway ;)


sucking & blowing
 
Wasn't it a "past" parts manual circulation diagram that was incorrect and.....
Not the workshop manual....certainly not mind anyway ;)


sucking & blowing

Yes, the 1972 parts manual has the filter drawn on the feed line...

Oil Filter Plumbing
...therefore, should be...
Oil Filter Plumbing

...also resulted in the feed and return hoses being listed incorrectly and the return line should not be drawn passing through the guide clip, '23' and this diagram error wasn't corrected in later parts manuals including 850 Mk3.
 
This ones from the Bible 😉
 

Attachments

  • Oil Filter Plumbing
    Screenshot_20230502-203826_Brave.webp
    121.5 KB · Views: 146
Back
Top