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Bypass oil filter problem #5267040 11/14/19 12:14 PM
Joined: Mar 2009
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mario49 Offline OP
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I have a 2018 ram 3500 6.7 Cummins 24200 miles
I recently added a sinister diesel oil filter bypass to the motor it takes the oil from the top of the oil filter housing there is a plug you remove and add a fitting to connect a line to and it routs to the bypass oil filter housing that’s mounted on a bracket furnished in the kit which is mounted to the engine block. From there a line takes the oil from the filter and returns it to the engine through the oil filler location at the front of the engine using a special cap provided.
After installing the kit I drove the truck for two days and noticed oil coming from underneath the truck and following the oil to the top of the engine coming from the CCV filter housing at the rear I cleaned all the oil off the engine and put shop towels in that area and drove the truck to verify that is where the leak was. The towels were saturated in oil. I cleaned the area again.
I removed the oil bypass from the truck and put it back to stock and drove the truck with no more oil leaks
My question is could the oil bypass system be pressurizing the engine causing the oil leak.

Re: Bypass oil filter problem [Re: mario49] #5267100 11/14/19 12:56 PM
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Donald Online Content
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I have a similar one in my PSD and it works flawless. No leaks. Been on for 2 years or so. Who sells/manufactured the kit?


2015 Subaru Forester 2.5 engine/CVT
2015 Ford F250 w/Powerstroke
2016 Subaru Crosstrek CVT (wife's)
Re: Bypass oil filter problem [Re: Donald] #5267213 11/14/19 02:32 PM
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mario49 Offline OP
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Sinister Diesel is the mfg also sold by them

Re: Bypass oil filter problem [Re: mario49] #5267234 11/14/19 02:54 PM
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Langanobob Online Content
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My guess is that there’s way too much oil flowing through the bypass filter and it’s getting sprayed around inside the valve cover and some of it is ending up in the vent filter. Too much flow through the bypass could also mean not enough flow through the full flow filter and not enough flow to critical engine parts.
First step I’d take is a phone call to Sinister Diesel and see what they say.

Re: Bypass oil filter problem [Re: mario49] #5267246 11/14/19 03:07 PM
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Donald Online Content
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My bypass filter came with a pancake adapter to fit between the oil filter and oil filter housing. It only allow a small about of oil to go to the bypass filter.

The plug you took out to install the line to the bypass filter housing could have been for many things. Maybe not even a bypass filter.


2015 Subaru Forester 2.5 engine/CVT
2015 Ford F250 w/Powerstroke
2016 Subaru Crosstrek CVT (wife's)
Re: Bypass oil filter problem [Re: Langanobob] #5267427 11/14/19 06:23 PM
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Ihatetochangeoil Offline
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Originally Posted by Langanobob
My guess is that there’s way too much oil flowing through the bypass filter and it’s getting sprayed around inside the valve cover and some of it is ending up in the vent filter. Too much flow through the bypass could also mean not enough flow through the full flow filter and not enough flow to critical engine parts.
First step I’d take is a phone call to Sinister Diesel and see what they say.


Nonissue. Flow thru the bypass filter is restricted not only by the size of the line that feeds it, but by restrictor orifices in the INPUT side of the bypass filter housings. I've been running 2-3 bypass filters for several years; no leaks and no engine oil starvation. I have a DIC that gives a digital readout of oil pressure in real time. If there were ANY bypass oil filter (or housing) manufacturer on the market capable of robbing enough oil flow to starve an engine, it would be all over the internet. Try Googling "engines blown up due to bypass filtration" and let us know your findings?

Re: Bypass oil filter problem [Re: Donald] #5267436 11/14/19 06:29 PM
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Ihatetochangeoil Offline
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Originally Posted by Donald
The plug you took out to install the line to the bypass filter housing could have been for many things. Maybe not even a bypass filter.


So how does a larger/smaller plug removal affect the oil pressure? Basic hydraulic principle is pressure being equal in all directions and at all points. The size of the plug removed could be two inches. The VOLUME OF FLOW is restricted by the size of the line and the input size of the filter housing...

Re: Bypass oil filter problem [Re: mario49] #5267451 11/14/19 06:44 PM
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Ihatetochangeoil Offline
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"My question is could the oil bypass system be pressurizing the engine causing the oil leak."

No. Unless you're returning the oil to the intake manifold or some place it REALLY should not be....You'd have such a mosquito fogger you'd shut it down in seconds if you didn't drown the combustion process in oil or hydrolock your engine, in which case I can't see you even getting it to start in the first place. Many others on BITOG (including myself) have run oil bypass filters for years and untold miles, leak and trouble free. Your leak is in the fault of your installation. Call me brutally honest if you wish, or prove me wrong?

cheers

Re: Bypass oil filter problem [Re: Ihatetochangeoil] #5267510 11/14/19 07:37 PM
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Langanobob Online Content
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Did not mean to imply that there is a problem with bypass filtration in general, obviously a lot of people have successfully run them, including me. There does appear to be a possible flow problem with this particular installation.

Originally Posted by Ihatetochangeoil
Originally Posted by Langanobob
My guess is that there’s way too much oil flowing through the bypass filter and it’s getting sprayed around inside the valve cover and some of it is ending up in the vent filter. Too much flow through the bypass could also mean not enough flow through the full flow filter and not enough flow to critical engine parts.
First step I’d take is a phone call to Sinister Diesel and see what they say.


Nonissue. Flow thru the bypass filter is restricted not only by the size of the line that feeds it, but by restrictor orifices in the INPUT side of the bypass filter housings. I've been running 2-3 bypass filters for several years; no leaks and no engine oil starvation. I have a DIC that gives a digital readout of oil pressure in real time. If there were ANY bypass oil filter (or housing) manufacturer on the market capable of robbing enough oil flow to starve an engine, it would be all over the internet. Try Googling "engines blown up due to bypass filtration" and let us know your findings?


Last edited by Langanobob; 11/14/19 07:55 PM.
Re: Bypass oil filter problem [Re: Langanobob] #5267629 11/14/19 09:44 PM
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Ihatetochangeoil Offline
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No sir. There was a LEAK. A leak is not a FLOW problem; it is a LEAK...The OP didn't tighten something sufficiently, or he didn't use a thread sealant, or he used a thread sealant on an AN fitting improperly...without the OP posting pictures or having lots more info such as the type of fittings, hose, and clamps used, it's all conjecture, but...SOMETHING is wrong with his INSTALLATION. The "sinister diesel oil filter bypass" system uses an Amsoil filter. https://www.google.com/search?q=sin...7j69i60&sourceid=chrome&ie=UTF-8

There are really only two hoses to run on a bypass setup, supply and return, with fittings on each end of both hoses, so there are only 4 hose connections necessary. The OP had a LEAK until he removed his kit. I have run an Amsoil system, a Kleenoil system, a Puradyn, an NTZ, and a Centrifuge. No leaks. Anywhere. I would not leave my driveway with a known oil leak.

Re: Bypass oil filter problem [Re: mario49] #5268021 11/15/19 10:31 AM
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AlaskaMike Offline
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I absolutely agree with Ihatetochangeoil.

Also, the port on top of the oil filter housing is a 1/8" NPT port. There are actually two ports there, and one feeds the oil line to the turbo. The other is plugged. This is a very common source for a bypass oil filter on Cummins engines, and in fact I use it in the bypass filter system on my truck.

Definitely the next step should be to call Sinister Diesel and get their advice.

Re: Bypass oil filter problem [Re: Ihatetochangeoil] #5274031 11/21/19 09:06 PM
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xtell Offline
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Originally Posted by Ihatetochangeoil
No sir. There was a LEAK. A leak is not a FLOW problem; it is a LEAK...The OP didn't tighten something sufficiently, or he didn't use a thread sealant, or he used a thread sealant on an AN fitting improperly...without the OP posting pictures or having lots more info such as the type of fittings, hose, and clamps used, it's all conjecture, but...SOMETHING is wrong with his INSTALLATION. The "sinister diesel oil filter bypass" system uses an Amsoil filter. https://www.google.com/search?q=sin...7j69i60&sourceid=chrome&ie=UTF-8

There are really only two hoses to run on a bypass setup, supply and return, with fittings on each end of both hoses, so there are only 4 hose connections necessary. The OP had a LEAK until he removed his kit. I have run an Amsoil system, a Kleenoil system, a Puradyn, an NTZ, and a Centrifuge. No leaks. Anywhere. I would not leave my driveway with a known oil leak.

I agree. All my bypass systems have fittings that are subject to vibration and heat but they do not leak. Connections should be clean and tightened correctly and proper sealants should be used.. . .

PS:. Good to see you back on the Bypass Forum ihatetochangeoil!!!

nuff said,

xtell

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