I have a motorcycle with a shared engine/trans oil sump and it uses a small paper cartridge filter in the engine case for oil filtration and i just got replacements to change the oil. Never thought to do this before, but since this is a small open type cartridge filter with bypass valve at the top. I put the new filter up to my lips and blew on it. Air blows right through 3 of the 4 new filters. A lot of air like the bypass is cracked open. I have a collection of old filters in 5 gallon can with a screen bottom so the oil can drip out, prior to discarding. So i went and found the last 2 i changed out on this bike. I cant blow air through either of those bypass valves. no matter how hard i try. I am thinking if air can get through on these new filters, oil will most certainly get through and be bypassing the entire time. Now to my question.
Should air be able to get by the seal for the bypass so easy on a new filter?
I called Wix, and the woman I spoke to was perplexed by this question, which was interesting because they specialize in filters. They woman told me that if i think there is something wrong with it to just return it to the store, but could tell me one way or another if it was normal to just be able to blow air through the bypass very easily.
My thoughts are the bypass should be sealed almost completely unable to let major air (or oil) through unless there are 2 conditions. 1. the oil is cold and the oil is having a hard time getting through the media at that time untill the oil warms up. 2. The filter media is clogged causing a pressure differential between inflow and outflow of the filter.
For reference, the 2 old filters i have that the bypass valves are tight as a drum are yamaha branded filters. These new filters that i can blow are through the bypass valves are wix.
Should air be able to get by the seal for the bypass so easy on a new filter?
I called Wix, and the woman I spoke to was perplexed by this question, which was interesting because they specialize in filters. They woman told me that if i think there is something wrong with it to just return it to the store, but could tell me one way or another if it was normal to just be able to blow air through the bypass very easily.
My thoughts are the bypass should be sealed almost completely unable to let major air (or oil) through unless there are 2 conditions. 1. the oil is cold and the oil is having a hard time getting through the media at that time untill the oil warms up. 2. The filter media is clogged causing a pressure differential between inflow and outflow of the filter.
For reference, the 2 old filters i have that the bypass valves are tight as a drum are yamaha branded filters. These new filters that i can blow are through the bypass valves are wix.