Engine/Transmission (1998.5 - 2002) Dual Bypass Oil filter

[MGrantham]

Has anyone installed a Amsoil dual bypass filter system?

 

[JFought]

bypass, yes

 

[Dick Langendorff]

I did not use the Amsoil, but the Frantz. I have two in parallel. Each one is good for 1/2 the oil capacity of our engines. They do an excellent job.

 

[AH64ID]

There a few people using it, but most just use the BMK-21 as you really don't need the dual setup on our small crankcase capacity.

 

[CUMMINZ]

Has anyone installed a Amsoil dual bypass filter system?

AMSOil Remote ByPass Filter Install - 2007. 5 Dodge RAM 3500 6. 7L Cummins Diesel

 

[CKelley1]

i think you mean a dual filter system rather than a dual bypass filter setup. the dual filter system is a very bad idea. it has a full flow filter with a spring restriction on it to force flow through the bypass filter. there is no way to tell when the bypass filter needs changing, not recomended for cr's. in the way and many other things. you do not have your sig filled out. the 04. 5 up trucks need a bypass filter for max life because of the in- cylinder egr on the 5. 9's and the egr on the 6. 7's. as ah64id stated the bmk-21 is the one to use if you go amsoil. do not change filter until it no longer flows oil. at regular oil change interval just hold up the cap with the return line with the engine running to see if it is still flowing or just feel the filter to see if it is hot. the dual frantz is a better filter and a lot cheaper

 

[CUMMINZ]

I AMSOil bypass system does not have a spring to restrict flow. The mounting block has a much smaller hole in the bypass side to restrict the flow thru it. I modified the original system and used the design built by AMSOil to incorporate both the old style and new style system. AMSOil used my design with my photos on their webside. The older trucks and older design ran a line from the top of engine mounting block to the single filter and returned oil to the engine filler cap.



http://www.amsoil.com/bypassfilters/2007_Dodge_Ram_Patterson.pdf



The new design removed permanently the engine filter using a divider block, ran 2 larger lines to the dual bypass block with a main filter and bypass filter attached.



That is what I installed but it caused a whine in the cab. I removed that system, replaced the engine filter. I then ran a line off the top of the engine filter block to the dual bypass block under the driver seat on frame. Running the lines down the driver side of engine where the compartment is cooler of engine heat. I then ran the return line back to the engine filler cap.



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I get a good flow back to the filler cap.



Now at service time I run the engine for 3k miles and change the engine filter and the full flow filter on bypass block. At 7. 5k I change same filters. Another 4k miles I do the same and so one. At about 16k I do a complete service- changing oil and all three filters. I do not make a complete service till Blackstone tells me to.



I get great results from Blackstone reports.

 

[AH64ID]

The new design removed permanently the engine filter using a divider block, ran 2 larger lines to the dual bypass block with a main filter and bypass filter attached.

The one you just described is not the dual bypass block. That's the dual remote system. The dual remote system is not recommended to be installed on 03+ trucks because of a low oil pressure issue at startup.



The dual bypass setup is a block designed to run 2 bypass elements with the full flow filter in the OEM location. The block has the restrictor orifice for both elements, not a spring or just single restrictor like the dual remote system.



Unless your running cheap full flow filters there is also no reason to change the filters as often as you are. With a bypass element the full flow actually stays cleaner longer! Amsoil full flow filters are 25K mile filters and you have 2 of them...



In addition, by having a dual remote system on the truck,in addition to a standard full flow, you are pulling a lot more than 10% of your oil that a bypass system uses. The full flow is receiving all the oil that 1/4" line can run. That is going to effect pressure and flow to the rest of the block, but your in cab indications won't tell you anything as the block only has a 6psi switch.

 

[CKelley1]

i agree with ah64id we make our own bypass filter setup's. cummins has a warning not to exceed 0. 032" on the orifice on the 03 up. we build the orifice in the fitting we use on the stock filter housing. we use a luberfiner 9750 filter that has zink replenishment and the same specifications as the amsoil. as the bypass filter starts to fill up the larger holes in the media it filters out smaller particles. it filters it's best at the point that it no longer flows oil. at 7. 5 k you are throwing away a better filter than you are putting on. and amsoil bypass filter is not cheap. you need to stop driving the truck until you get this fixed

 

[CUMMINZ]

No matter what I called it I am running 2 standard filters and 1 bypass filter and I am getting good oil reports. That is all that matters.

 

[AH64ID]

No matter what I called it I am running 2 standard filters and 1 bypass filter and I am getting good oil reports. That is all that matters.

It does matter. . they are different parts and serve a different purpose. There is a big difference in the DUAL-GARD and the Dual Remote (which you have).

Your system is not a good one, it robs too much oil pressure and flow. That system is not designed to run as a bypass, which is how you have it installed. Amsoil nor Cummins would reccommend your setup. With a single bypass element there is no need for dual full flow's, especially if than 2nd full flow is robbing oil pressure/volume. You have an unrestriced 1/4" ID hose that is pumping oil from the pump directly back to the crankcase, where a true bypass uses 1/32" ID restriction orifice. 1/4" has 6300% more area for oil to flow thru. If you have the older BMK-15 (which it sounds like you do) you hindering your bypass performance by using it like you are. There is a spring that doesn't allow bypass operation at low pressure and since your feeding a 1" filter with a 1/4" hose and a low pressure return to the oil filler cap your pressure at those filters is lower than crankcase and you reduce your bypass operation. If you went with a BMK-21 you would probably have better bypass filtering, and for sure have better oil pressure and flow thru the block.

 

[CKelley1]

mgrantham we are not trying to hyjack your thread. just trying to help a person that does not understand how it works.

 

[CUMMINZ]

Filter setup in middle is General Use Dual Remote Oil Bypass Unit which is what I have but I also use the original engine filter also. I ran 1/4" lines which restict flow from the primary filter and keeps my engine oil pressure up to normal.



Click below for Cummins info.



http://www.gorowan.com/2007ram/engine/Cummins_bypass.pdf



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[AH64ID]

Filter setup in middle is General Use Dual Remote Oil Bypass Unit which is what I have but I also use the original engine filter also. I ran 1/4" lines which restict flow from the primary filter and keeps my engine oil pressure up to normal.

I know that's what you have. . An unrestricted 1/4" line is TOO much flow for a bypass filter. Like I said it's 6300% more area than the standard bypass restrictor orifice. With the design of the older BMK-15 and a full flow filter you literally have a 1/4" line diverting oil from your motor all the time, that's a lot of oil to not go thru the motor, and very little actually going to the bypass.

Did you add an oil pressure gauge to know you still have good pressure? The OEM gauge is fake.

That link was about the Fleetguard Venturi filter, which is not a traditional bypass. Cummins allows 1 GPM for bypass on the ISB, I can guarantee you are far exceeding that.

This Cummins bulletin states that bypass filters should use about 10% of the oil, which the 1/32" orifice provides.

Cummins Engine Oil Recommendations

 

[MGrantham]

Has onyone used the Dodge BMK25 from amsoil???

 

[AH64ID]

They are fine on pre-03 trucks, but not for 04+. . But in all honesty a BMK-21 and ELF 7349 is just as good and cheaper

 

[CKelley1]

i think the bmk-21 and ELF7349 is better than the bmk 25 because you can never tell when to change the bypass filter on the 25

 

[AH64ID]

True, thou I end up changing mine before it plugs. 2 years of use is plenty for one filter for me.

 

[fest3er]

Somewhere in here (TDR) I posted pictures years ago of the dual remote system I installed back around 60K miles with the battery bracket I designed. Truck now has 275K miles. I haven't changed the oil since; but I had enough leaks and loss so the oil's been 'changed' fairly often. I've generally changed the full flow filter at 7500-10000 miles and the bypass with every other full-flow filter change. The dual remote moves the full flow filter up to where it is easily accessible. I've never had a lick of trouble with the hoses I built using the Amsoil-supplied parts; I protected them where they might chafe through.

 

[CUMMINZ]

I know that's what you have. . An unrestricted 1/4" line is TOO much flow for a bypass filter. Like I said it's 6300% more area than the standard bypass restrictor orifice. With the design of the older BMK-15 and a full flow filter you literally have a 1/4" line diverting oil from your motor all the time, that's a lot of oil to not go thru the motor, and very little actually going to the bypass.



Did you add an oil pressure gauge to know you still have good pressure? The OEM gauge is fake.



That link was about the Fleetguard Venturi filter, which is not a traditional bypass. Cummins allows 1 GPM for bypass on the ISB, I can guarantee you are far exceeding that.



This Cummins bulletin states that bypass filters should use about 10% of the oil, which the 1/32" orifice provides.



Cummins Engine Oil Recommendations

Where do you get to much flow for bypass? The orifice on the bypass mounting block is the restriction. The rest of the flow goes thru the regular filter on the block. Either way the Blackstone results prove the system is working.