Oil guard bypass filter for LLY question.

[AndyG]

Has anyone put the oil guard bypass filter on the LLY engine? Is the filter adapter required or would removing one of the plugs above the stock full flow filter be a suitable place for the oil supply line? Thanks for your help.

[Dewey Faircloth]

I understand it will work either way.
Have the adapter on mine.

[AndyG]

The main reason I am asking is the price for just the filter is WAY less than the install kit, I can easily get the required fittings, and I would rather have a steel jacketed hose.

[JD Diesel]

You only buy the brackets once then move from truck to truck. ;) JD

[AndyG]

Unfortunately, I don't have the money to buy new trucks every few years. My duramax replaced a 1992 Silverado with 176,000 miles that I bought new. Sooo, when I do something to the new truck, I will do it once, do it right (over engineered), and keep it forever!

[jbplock]

Andy,

If you choose not to use the OilGuard sandwich adapter, the fitting on the bottom of the full-flow filter housing (oil cooler assy) will work (I have 40k miles on mine).

http://thumb2.webshots.com/s/thumb1/0/56/42/65005642hlJEYv_th.jpg
Pressurized oil Port (http://community.webshots.com/photo/65003591/65005642hlJEYv)

However the plug is sealed with what appears to be red (permanent) loc-tite so it comes out hard. Also, I you have 4WD be sure to use a 90 deg fitting to allow clearance for the front drive shaft up & down movement. You can also skip the oil pan fitting and return through the filler cap using a modified aftermarket oil filler cap.

http://thumb1.webshots.com/t/54/154/1/98/11/401119811tXHgra_th.jpg
Oil Filler Cap Return (http://community.webshots.com/photo/65003591/401119811tXHgra)

I

[AndyG]

jpplock, Where did you get your hose made, and how much did it cost you, if you don't mind sharing?

I was thinking of going with pre-fab hydraulic hose from Tractor Supply and putting SS jacket over it myself.

[jbplock]

Andy,
Initially I used the Oil Guard supplied rubber hose to get the required lengths but later had some Weatherhead Stainless Steel covered Teflon hose (http://community.webshots.com/photo/65003591/65003907XCiCNw) made up at a local Hose Shop. The Weatherhead part numbers for these assemblies are H24304-6046040020A and H24304-6046040032.5A (last digits are the length). They were about $30 per hose

[AndyG]

Bill,
What are the length of your hoses? Is that centimeters or inches? How did you do the connection to your oil pan? Drill a hole and weld on a nut or some kind of fitting on the inside and a lock nut on the outside? I like this clean under the truck install better than going back to the filler cap if it can be made leak tight. Did you have to drop your pan to get it done? Do you know what the inside diameter of the kit supplied hose is?

Thanks, Andy

[jbplock]

Andy,

The Oil Guard hoses as well as the Teflon hose I used are

[AndyG]

Wow, I would never have quessed a special material was used for the oil pan....good thing I didn't strike an arc on it yet! Thanks for all your advice.

[Craig M]

As I understand the Oil Guard system, the hoses can be made in various configurations. Getting the correct flow rate through the filter is important. Wrong size inlet hole will have it acting more like a full flow filter rather than the slow, bypass filter that it is designed to be.

[jbplock]

Originally posted by Craig M:
... Getting the correct flow rate through the filter is important. Wrong size inlet hole will have it acting more like a full flow filter rather than the slow, bypass filter that it is designed to be. Craig,

Good point about oil flow through the bypass. The Oil Guard EPS-20 has a built in 0.040 inch orifice that restricts flow to 1.5 quarts per minute (see specs) (http://www.oilguard.com/Other/TechSpecs.php). This rate is much less than the volume of oil per minute passing through the full flow filter. Using the supplied