Oil Filter Bypass, Bypass or not to Bypass

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  • Опубликовано: 16 янв 2025

Комментарии • 49

  • @boltgunfan
    @boltgunfan 8 месяцев назад +6

    We plugged the bypass on our midwest asphalt circle track race car. But there was one potential problem with running the heavy 20W50 racing oil. One night near the end of the season, the temperature dropped into the low 50's and one of our competitors started his engine to warm it up. He immediately revved it really high and blew the oil filter apart. We never knew if it was a cheap oil filter or what was the cause of the failure. We took it as a lesson learned and kept the engine warm between heat races on cold nights.

    • @mellott5150
      @mellott5150  8 месяцев назад +1

      i have heard of that happing but never seen it but its something to think about but thanks for the heads up i will keep a eye on it couse i do run 20w50 but when we race its hot out

    • @ericuncapher9922
      @ericuncapher9922 8 месяцев назад +1

      The bypass won't do that. A suck pressure regulator in pump will

  • @robertreiman
    @robertreiman 20 дней назад +3

    It is not the oil pressure from the pump that opens the valve, it is the pressure difference across the filter caused by the flow that opens the valve. Many filters have a built-in bypass, so plugging it does not matter.

    • @mellott5150
      @mellott5150  20 дней назад

      @@robertreiman good point thanks for your input this is how we lurn

  • @Marksracingengines
    @Marksracingengines 8 месяцев назад +2

    Answer to your question is....yes the bypass pretty much stays open all the time at anything over 15lbs. so yes at 40 and lets face it, race engines usually run WAY above that (sometimes 70 to 80 psi or more at high RPM), at least half of the oil or more is blowing past the bypass valve unfiltered. I plug every bypass that leaves this shop (except on some stock engines) and tell my customers to use a Wix filter and a race engine I demand a Wix Racing filter (yes the Wix Racing filters less micron, but flow better and wont collapse)...You are giving great advice there for sure. It should be noted that almost all filters have a safety bypass built into them anyway. The key is, with 38yrs of race engine building behind me....Run a good filter and plug the bypass. Great video!

    • @mellott5150
      @mellott5150  8 месяцев назад

      thanks well said

    • @ggordon4127
      @ggordon4127 2 месяца назад

      It should be dependent on the pressure differential across the filter.

    • @Marksracingengines
      @Marksracingengines 2 месяца назад

      @@ggordon4127 Correct. However oil viscosity, oil temp and filter material weigh in on this as well. Basically the pressure is going to take the path of least resistance. It's not hard for a high volume pump to stack up oil against even clean filter media of any type and overcome a 15lb bypass.

  • @laytonturpin864
    @laytonturpin864 8 месяцев назад +3

    In my humble opinion. Bypass valves are for the general public. In racing applications, it’s very different. When racing engines are built, they have to go through break in procedures that require a certain amount of attention. Fresh engines require camshaft and ring break in procedures that creates a lot of fine particulates in the break in oil that needs to be captured. It can take as many as two to four oil changes to properly break in a race or high performance engine, depending on what type of camshaft you’re running. Rollers fewer than flat tappits.
    This is actually a subject for high performance engines. I hope this helps a bit.

  • @edsmachine93
    @edsmachine93 8 месяцев назад +2

    Always block it off on High Performance and on new engines.👍👍
    On stock engines after break-in if you like you can re-install the bypass.
    Just subscribed to your channel.
    Have a great weekend.

    • @mellott5150
      @mellott5150  8 месяцев назад +1

      thanks for the comment

    • @mellott5150
      @mellott5150  8 месяцев назад +1

      and thanks for subscribing

  • @ronmurnieks9483
    @ronmurnieks9483 8 месяцев назад +7

    Isn't it a "differential pressure " bypass? So if the Filter causes more than 10psi "pressure drop" Some will bypass the filter?
    Not a situation where it opens after 10 psi of engine oil pressure

  • @RonRussell-sj1zf
    @RonRussell-sj1zf 7 месяцев назад +2

    I think that bypass valve works when the difference in pressure from the dirty side to the clean side is 10 psi, so if you have a clean filter and oil and your engine is making 50 psi then it's 50 psi on both sides of the filter and valve stays closed. As you put miles on the oil and it starts to get dirty and the filter is loading up with contaminants, you may start to get 50 psi on the dirty side and 48 on the clean side, keep running it and that difference starts to increase. Once the difference gets to 10 psi that valve will open and let some dirty oil "bypass" the filter and go the the engine. The key is to change oil/filter before that happens.

  • @ggordon4127
    @ggordon4127 2 месяца назад

    The by pass only opens up depending on the pressure drop across the filter not the oil pressure per say. If you block the by pass consider using a bigger capacity oil filter how big? Check out what Bill Jenkins used on his 331 SBC.

    • @mellott5150
      @mellott5150  2 месяца назад

      @@ggordon4127 cool I will look at that is he on RUclips

  • @mellott5150
    @mellott5150  8 месяцев назад +1

    i appreciate all the comments hearing other peoples ideas help us learn from there experiences

  • @PeggyParrow
    @PeggyParrow Месяц назад +2

    Ive run WIX 51061 on everything, what you dont know is the filter has a much stronger ɓy pass in it How you can check it is, get a big long screwdriver set the filter on a bench, open end up ,stick the driver down into it and press down really hard. The by pass spring will move, so.. dont worry about the filter plugging, Wix has you covered !

    • @mellott5150
      @mellott5150  Месяц назад

      @@PeggyParrow good to know thanks

  • @GenderSkins
    @GenderSkins 8 месяцев назад +1

    Well you have an additional problem if you block off the bypass valve. And that is the risk of blowing the oil filter apart, and before anyone ask. Yes you can blow up an oil filter, or split an oil filter if the oil pump builds more pressure than what the oil filter is physically capable of handling. I have only ever seen that happen on one engine, in one vehicle which was a 1970 something Ford F-100 dent side which the engine was either a 302 or a 390 in it. The truck belonged to my father, and it had a faulty oil pump in it that caused the engine to build so much oil pressure it split the oil filter.

    • @mellott5150
      @mellott5150  8 месяцев назад

      thanks for the comment and thats something to keep in mind for sure

  • @will7its
    @will7its 3 месяца назад +1

    Cold thick oil could starve the engine. The filter has a bypass too. I put a washer under the spring to make it stiffer and they sell stiffer springs for hp use.

  • @mohanperformance.enginerd.1308
    @mohanperformance.enginerd.1308 8 месяцев назад +1

    Chevy is 1/4" npt.
    If you do it you should run a 396 truck filter or a remote adapter and something like a HP6 or equivelent to have enough flow volume. On a regular passenger daily. The bypass is ok to have. They often run open. In a serious hi perf application. They should be plugged and a huge filter used.

    • @mellott5150
      @mellott5150  8 месяцев назад

      sorry i did say the wrong size tap but thanks for the comment

  • @GiancarloBenzina
    @GiancarloBenzina 4 месяца назад +2

    Very simple. For stock engines.
    1. block your vehicles bypass!
    2. for fresh engines use a top quality filter with biggest filtering area and no bypass. Replace filter and oil after 2-3 short intervals, i.e. 200m, 500m, 1000m.
    3. Use top quality filter with bypass after that and frequently replace oil and filter together every 2000-4000miles.
    4. Use Manufacturer specified oil if available, otherwise proper research backed premium brand matching oil.
    5. don’t ever flush/additivise oil or gas. Top quality oil and gas treats contamination as it should be. If your engine is Hotrodded the expert of manufacture is your responsibility now. Good Luck if you’re a beginner. A big learning curve will be ahead.

  • @caleblewis3463
    @caleblewis3463 8 месяцев назад

    I think it’s important in cold environments when the oil is too thick to be pushed through the filter. It’s definitely there for a reason.

  • @stevenbarnett2169
    @stevenbarnett2169 8 месяцев назад +2

    You would be surprised how much unfiltered oil goes through your engine.

  • @3Repete
    @3Repete 8 месяцев назад +1

    It only opens when there is 10 lbs of pressure difference/restriction, not 10 lbs per square inch. So, yuh 50 weight in the cold, bypass: plugged up filter, bypass. But most filters bypass too. Normal filters bypass internally, and if they ever bypass it's only by their differential amount. So there is still filtering happening with "some" oil going around the filter. I understand your reasoning for the bypass on race and performance engines though.

  • @davidciesielski8251
    @davidciesielski8251 8 месяцев назад

    Hi, thanks, I have a lt4 in a Camaro, GM sells two oil filers for that motor, and the upgraded one has a higher bypass pressure in the filter itself... What does that mean?? I think the normal one is 15 psi and the upgrade one is 25...PLEASE HELP...Dave

    • @fastinradfordable
      @fastinradfordable 8 месяцев назад

      Install the biggest one that fits.
      Higher pressure can cause leaks because it puts that higher pressure behind the seals

  • @pacman3908
    @pacman3908 8 месяцев назад +2

    Most oil filters have a biult in bypass now

    • @peskypeet
      @peskypeet 8 месяцев назад

      Most but not all. Seems most filters with no built in bypass focus mainly on getting volume passed so they sacrifice by not filtering the smallest particulates. The balancing act.

  • @peskypeet
    @peskypeet 8 месяцев назад

    Personally I like to block them in a performance application. However if you're going to do that it would seem wise to look for the biggest filter you can fit WITHOUT a bypass listed in the specifications. Some places have to special order that.
    It's funny to me the amount of people who think they are getting straight filtered oil when they block that passage only to install a filter with a built in bypass. The redundancy does them in.
    Filters with no bypass also normally focus on getting volume through the filter so they aren't the greatest at filtering the finest particulates. It's a balancing act.
    You also have to remember to take it easy while warming up the engine/ oil or it may spring a leak with high oil psi. There could also be the possibility of tearing the filter material or separating the joined ends at cold start. Torn filter material is likely to only be found when the filter is dissected.

  • @laytonturpin864
    @laytonturpin864 8 месяцев назад

    By the way, you have a new subscriber!

    • @mellott5150
      @mellott5150  8 месяцев назад

      thanks for subscribing

  • @marcokahny709
    @marcokahny709 8 месяцев назад +1

    Never really thought about it by passing but what I've done for a lot of years is change just my filter between oil changes

    • @mellott5150
      @mellott5150  8 месяцев назад

      that will work thank for the comment

  • @PeggyParrow
    @PeggyParrow 16 дней назад +1

    To Bolt gun pass, in comments, for one thing, its STUPID to rev any engine high when its cold, its nit wits like that that blow up perfectly good engines then blame it on the engine company or builder, besiides there is NO reason to run such a thick oil, we run straight 30 wt. Valvoline in all classes,! No problem, We run wix 51061 in Sbcs, Bbcs, 51515 in the fords, .003 on mains, .002 on the rods ! Multi grades or really light oils do not work with these clearances, might hammer rod bearings out Hope this helps

  • @lylejohnson7281
    @lylejohnson7281 3 месяца назад +1

    run a screen on top the oil filter,, I'm thinking moroso makes them,,,,break your engine in then remove screen and see if you have medal or whatever in the screen!!! works great

    • @mellott5150
      @mellott5150  3 месяца назад

      @@lylejohnson7281 no I didn't know they made that good info thanks

  • @laytonturpin864
    @laytonturpin864 8 месяцев назад +2

    One more thing. Motors are electric. 😊

  • @Thundarr995
    @Thundarr995 3 месяца назад +1

    I don't think plugging the bypass matters that much. Most oil filters have a built-in bypass,so they don't bulge, leak,or worse. The filter is probably almost never filtering 100% of the oil going through it. The higher the oil pressure goes, the more oil gets bypassed around the oil filter element inside the filter. So you can go ahead and plug the bypass,but you're never gonna get 100% of the oil to go through the oil filter. It starts bypassing the filter element at as low as 20psi. Don't believe me? Look inside any oil filter, and you'll see a spring and a rubber diaphragm. When there's greater than about 20 psi of oil pressure on it,it begins to press on the spring and let the oil be diverted around the filter element because the oil can't go through the element fast enough. The filter would leak or burst if it didn't have this feature.

  • @joe-hp4nk
    @joe-hp4nk 3 месяца назад +1

    The filters have a by pass.