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Engine oil filter used upstream of electric oil pump #5346969 02/11/20 08:49 AM
Joined: Feb 2020
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ReillyRacing Offline OP
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Hello everyone,

I am developing a manual transmission cooler kit for a specific application. The transmission does not have any internal mechanical pump for an external cooler, so an external electric pump will be used.

I would like to filter the fluid BEFORE it goes through the pump, both for the pump's sake and the transmissions. For ease of serviceability, i would like to use a [high quality] spin-on oil filter (probably the smallest one I can find, such as from a motorcycle). I do not want to use the inline-style filters as i am pretty sure you have to remove oil lines and completely uninstall it to take it apart & clean it.

I am researching what the downsides / risks are associated with PULLING oil through a filter rather than PUSHING it through.

Some considerations:

- The manual transmission fluid used is a 90 weight gear oil, which, when up to temperature, is essentially the same viscosity as 30 weight motor oil.
- The electric pump with be on a temperature switch, so it will not turn on until the oil is at / above normal operating temp.
- The filter and pump will both sit below the fill line of the gearbox, so they will always be full of oil when the pump turns on
- The electric pump pushes a low volume of fluid (compared to an engine oil pump), approximately 1.0gpm

So I'm looking for:
-Specific data on what happens when you PULL oil through a filter instead of PUSH it.
-Any other suggestions for an inline filter that is easily serviced without taking the whole thing apart.

Re: Engine oil filter used upstream of electric oil pump [Re: ReillyRacing] #5346985 02/11/20 09:02 AM
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ARCOgraphite Offline
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deleted


Last edited by ARCOgraphite; 02/11/20 09:03 AM.

2019 VW Jetta S 6MT OCI#2 7378mi-MOTUL Specific VW508.00+VW Service Filter; '17 Subaru Crosstrek CVT OC#8 60864mi-Subaru Idemitsu 0W20 + SOA Filter
Re: Engine oil filter used upstream of electric oil pump [Re: ReillyRacing] #5346986 02/11/20 09:04 AM
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tcp71 Offline
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How about a metal can, 3/8” nipple magnefine transmission filter. Should do fine regardless of pull/push configuration.

https://magnefinefilters.com/

[Linked Image]


2016 F150 Eco: Edge 0w40
2005 Sienna 3.3: NAPA 5w30 syn. (varies)
Re: Engine oil filter used upstream of electric oil pump [Re: ReillyRacing] #5346996 02/11/20 09:19 AM
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Ride_Red Offline
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Most pumps are rated to deliver pressure.
You will need to make sure whatever pump you purchase is rated for suction and self-prime.


2019 4Runner 4.0L, 18K Mi, M1 EP 0W-20, OEM
2010 CR-V 2.4L,100K Mi, M1 0W-20 AFE, M1-110
2009 T&C 3.8L, 130K Mi, ST 5W-20, Fram
2006 Cobalt 2.2L, 184K Mi, ST 5W-30 HM, Fram
Re: Engine oil filter used upstream of electric oil pump [Re: ReillyRacing] #5347013 02/11/20 09:44 AM
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CT8 Offline
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A PH8a sized filter base kit would be a good size and the simplest design would be a Differential cooler kit.


2015 F150 2.7
2018 F350 6.2
Re: Engine oil filter used upstream of electric oil pump [Re: ReillyRacing] #5347051 02/11/20 10:27 AM
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Mightymouse Offline
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Interesting,
Probably best to go with a hydraulic filter that has high pore density.

Re: Engine oil filter used upstream of electric oil pump [Re: Ride_Red] #5347227 02/11/20 02:10 PM
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ZeeOSix Offline
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Originally Posted by Ride_Red
Most pumps are rated to deliver pressure.
You will need to make sure whatever pump you purchase is rated for suction and self-prime.


I'd suggest setting up a simple bench test to see how the pump performs while sucking gear oil at temp.

Re: Engine oil filter used upstream of electric oil pump [Re: ZeeOSix] #5347701 02/11/20 10:09 PM
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ReillyRacing Offline OP
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Good idea.

The pump I'm considering using is designed to be an electric turbo oil scavenge pump, so I think I'm on the right path

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