Excessive blowby w Frantz filter

[Tom W]

I purchased an older model filter and located the return line into the valve cover. The blowby increased significantly and there was also oil seepage at the filter seal.



I talked to Deborah Walker at www.wefilterit.com and learned that due to the high oil pressure of the Cummins engine the filter needed a restricter orifice. This is just a small brass fitting installed in the filter inlet. With no restricter the volumn of oil flowing into the filter increased the internal pressure in the filter and also put enough excess oil into the valve cover area to increase the blowby.



I installed the restricter orifice ( it has a 1/16" hole ) and this fixed the problems. The blowby is back to normal and there is no sign of seepage at the filter seal.



My thanks to Deborah for the excellent service and a good product.



Tom

 

[Gary - K7GLD]

That's a surprise to me - I have 2 of those filters - BOTH have the restricter installed as PART of the filter right outta the box - wonder where yours went prior to installation?



I still have to get one of my Frantz filters installed on the new truck myself...

 

[The patriot]

I was told that some of these filters are used as fuel filters. My guess is it's the same filter without the restrictor.

Probibally do this to cut down on invintory issues.

JM. 02

Eric

 

[WeirCummin]

Tom, It's good to see that you were able to get the blowby problem solved with the bypass filter setup.

 

[Bigsaint]

Interesting

I also have the Frantz, it came with the restrictor but I somehow misplaced it prior to the install. A quick call to Deb. had another enroute, but the filter was already installed so I left it that way until I swap out the TP filter. My blow by is very low, much less than when I was without the Frantz and using Rotella T. I have Vavoline All Fleet in the case now, 15W-40.



I did have to really tighten the cap to the Frantz to stop it from weeping. My restrictor will be going in soon.



Scott W.

 

[Tom W]

The filter I bought was unused but old. It had the old style clamp, the over center type with a D ring retainer, which I also replaced with the current type. The restricter was included in later models.



My truck is a 95. 5 24V and the breather hose is on the driver side of the engine. This might have been a factor in the blowby.



Tom

 

[Todd G]

What's the restrictor look like? My filter kit looked pretty old when I got it and I don't remember a restrictor.

 

[Tom W]

Todd, the restristor is a brass fitting about an inch long and it has a 1/16" hole. It screws into the inlet of the filter and the supply hose screws onto it.



Tom