View Full Version : Cheap bypass filters

08-15-2012, 05:11 PM
Found these on Ebay


I bought 6 and 36 filters, you won't find a cheaper price on a bypass filter. They have a metric thread but I just drilled the thread out and retapped to 1/4 NPT so hoses are cheap too.

If you value your motors this is a cheap way to prolong their lives......

08-15-2012, 05:20 PM
Tell us more. Where are you plumbing them into? Still use factory filter? Extended drain intervals? Things like that. I should put some sort of setup on each 7.3 I have, and the bucket truck.

I've got the coolant filters on the 7.3 already...

08-15-2012, 06:05 PM
Coolant filters you say? Tell me more.

08-15-2012, 06:49 PM
Wow you have coolant filters but no bypass??

Bypass filters are used in conjunction with regular full flow filter which filters particles 40 + microns. Most engine wear is caused by particles of 10 microns and smaller. Bypass filter, filters about 1 quart per minute and filters out particles down to 1 micron so you have clean oil all the time. Google it, army core of engineers put a bypass filter on a tractor trailer and did one oil change after break in period and then ran it for 1 million miles, tore it down and they said the cross hatchings were still on the cylinders......

I run them and change my oil 1 time a year due to condensation contamination. For the price you could double your service interval and stop engine wear.

08-15-2012, 07:02 PM
On the chipper would be nice. Which bypass setup do you use Paul?

08-15-2012, 07:47 PM
I have an older obsolete setup on my chipper and chip truck and knuckle boom, just got 6 of these listed and will put them on the chip truck trans, wheel loader engine and hydro oil, my and my wifes TDI cars and other stuff

08-15-2012, 08:01 PM
What ports are you tapping into on the 7.3? I understand you need a feed and a drain into the pan...

Yes Chris, Coolant filters on my 7.3's. Will put one on the bucket too. I guess it's a common pre mature killer of the 7.3 (most diesels too) I guess, gotta maintain the SCA's and there is a ton of casting sand in there.

I get mine at dieselsite.com. $100 gets the kit. You can build your own for probably 30-40 piecing it together, but I like things to look "factory" and the time saved spent gathering the parts is worth the extra money for me.

08-15-2012, 08:06 PM
You've got my attention. I scored a free 6.0 tranny coooler for my 7.3 today and while im in a preventive maint frame of mind ill have to think over a coolant filter.

Al Smith
08-15-2012, 08:17 PM
FWIW they used to put "doubles " on some of the Ford heavy duty industrial engines depending on the applications .I've got a couple of adapters some place in all my junk from 429 industrials .Believe it or not they also used double thermostats on some of them .One application I know of was a 429 used on Onan natural gas engines used for emergency power on micro wave towers .

08-15-2012, 08:54 PM

These sounded familiar...

08-16-2012, 06:51 PM
B 7.3s are easy to tap into, right above the spin on oil filter is 1/4 npt plug. Pull it out and screw in a hydraulic hose leading to the filter. It might be more tricky to find a spot to put it as they are pretty big. I returned mine through the plastic oil filler cap but to do it better pull off valve cover and tap it in there.

08-16-2012, 07:00 PM
I think there is a spot for a return down near the top of the oil pan in the side of the block. I did some research last night.

08-17-2012, 05:46 AM
Like so

08-17-2012, 09:58 AM
It would be cool to see a 'before' and 'after' picture of used oil with the addition of a bypass filter. I think it would be a good selling point to people. Naturally, people will be putting clean oil in with their new filter, though.

08-17-2012, 02:32 PM
Google fs2500, they have a demonstration that is pretty impressive, they put a bunch of soot in oil then filter it for a few minutes and totally clean it up....

08-17-2012, 05:44 PM
My buddy put a by-pass filter on his 6.4(ford) and after a 1k it was the cleanist diesel oil I'd ever seen. I should look into doing it myself I think.

08-17-2012, 06:12 PM
for less than a hundred bucks why wouldn't you??? cannot imagine why folks aren't interested, I putting one on my f550 trans also.

08-17-2012, 06:13 PM
I'm interested for sure. I've never bought off of e-bay before though. I'll probably have to pay through the nose locally.

08-17-2012, 07:00 PM
On the transmission are you just tapping into a cooler line?

08-17-2012, 08:11 PM
Yup thinking Im just going to get a 3 way T as it comes out the trans run it through the filter and back in the other cooler line. Im worried about that trans boy since I just got a 9K chipper:O

08-17-2012, 08:15 PM
Sounds like a good idea. Ive got a leaking real seal. As soon as I get that fixed I'm putting a mag hytec deep pan on it. Might as well do the filter mod as well

08-17-2012, 08:41 PM
Just looked at the mag hytec pans, looks cool. Wonder if you couldn't just tack some fins on your existing pan???

08-17-2012, 08:51 PM
The additional 8 quarts of fluid was what appealed to me really!

08-17-2012, 08:59 PM
It is a fact that deep dump tranny pans do wonders. The torqshift trannies on Fords are pretty strong but the old e4od trannies had a huge boost in life expectancy with a deep pan. Mine will be getting a tranny cooler from a 6.0 psd next week. My uncle is a senior master diesel tech for Ford and has sworn that deep sump pans make a huge difference. Oddly enough though, he says more ford trannies cook from bad tranny coolers then anything else.

08-18-2012, 12:49 PM
I run them and change my oil 1 time a year due to condensation contamination. For the price you could double your service interval and stop engine wear.

Interesting thread, Paul. I was wondering, if these filters are so effective, why is water/condensation filtration the factor that you base oil change timing on, isn't water easier to filter out of oil than other tiny oil impurities?

08-18-2012, 02:24 PM
Water should turn to steam in the oil and blow out a vent somewhere.

08-18-2012, 03:50 PM
Water should turn to steam in the oil and blow out a vent somewhere.

Nope, the detergent in the oil allows it it to suspend in the oils chain and not steam out.

06-18-2017, 02:26 PM

Brian, this is the thread.

06-18-2017, 03:59 PM
Wanna get real freaky about clean oil..? Down to .1 micron..?


06-18-2017, 07:33 PM
wow I'm really surprised I have never read about centrifugal systems. Cool. Really might have to try that..

Been thinking about putting together a remote system to clean hydraulic oil. This might work out well for that.

06-18-2017, 07:47 PM

Clean oil is not necessarily good oil. Yeah?

06-18-2017, 08:05 PM

06-18-2017, 08:10 PM
The additive package in the oil could be worn out, the PH off, etc.

06-18-2017, 08:41 PM
Never been a fan of extended oil changes myself, even if it looks fine.

06-19-2017, 09:36 AM
You can submit your oil for testing. A big hydraulic tank holds enough to merit testing, perhaps.