Oil filter adapter stupid question
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Oil filter adapter stupid question

  1. #1
    Aquacraft Eddie's Avatar
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    Default Oil filter adapter stupid question

    Hi everyone , I have a stupid question like usual and at times like this I miss gn7 he would probably give me an ear full. The question is about the oil filter adapter for a BBC 454, I have seen motors with the gasket and without the gasket that goes between the block and the adapter not sure if I asked this a long time ago or not I honestly can't remember but anyways when I rebuilt my old turd I bought a gm adapter that came with the gasket so I used it , now I'm helping my dad rebuild a 350 and when we got to the adapter that he bought it did not come with one and I remember they used to sale them seperate so I went looking and couldn't find one then I was told you didn't need one I talked to melling who said they don't use them and the gasket could come apart and get sucked up in the oil system , so I was like shit I guess I should take mine off to be onthe safe side so I stared to take it off and noticed I had bought the gm one and I looked it up and it comes with the gasket still , so i called the nearest gm dealer and asked them to look it up and they say to use the gasket so I did notice that the bottom of the gm one I have does not have a raised ridge on it like the mr gasket and others that don't require a gasket so I'm wondering if this is the difference ? The gm one needs the gasket ? Because it doesn't compress maybe ? I know that even if it doesn't seal it doesn't matter because the filter seals to the block but my main question is do I leave the gasket in there or take it out or does it even matter ? I didn't think this was a big deal at all until one of the tech guys at melling said the gasket could come apart and go in the system ( pretty sure it was melling that I talked to ) anyway gm says that they originally came with the gasket so I just left it on there but it's bothering me now and figured I'd ask this stupid question and see what you guys would do
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  3. #2
    Aquacraft Eddie's Avatar
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    This is a pic of the bottom of another adapter that has the raised ridge , I'm almost sure that my gm one is just flat so I was thinking that's why it needs a gasket not sure though , I was thinking maybe this ridge gets compressed against the block so no need for a gasket ? But the gm one I believe is flat but not sure I never took it off just remembering that it was flat
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    Village Idiot fc-Pilot's Avatar
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    I am no GN7 and I sure didn't stay at a holiday in, but here is my two yen. I would leave the gasket in your BBC until the time comes that you want to pull it out and want to freshen it. Then think about it. I would then use the other ones just as they are. I have used them many times and cannot see any ill effects of running it that way. Now having said all that, I am open to hearing what others might say as well.

    Paul

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    Senior Member ol guy's Avatar
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    If you study the pictures you will notice that the proper G.M.adapter has a raised "RIB' so to speak to seal it to the block(been that way for years). Now if you look at the gasket diameters you will notice it cuts off half if not more of the bypass. Now to add another thought, if you run a remote filter/cooler you will notice the adapter runs O-RINGS not a gasket to seal only on the areas intended NOT a gasket that may interfere with flow. MLAO M As an add-on--- In my opinion there is no such thing as a stupid question. M
    Last edited by ol guy; 09-27-2017 at 05:00 PM. Reason: add on

  7. #5
    Aquacraft Eddie's Avatar
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    Thank you guys for the response , I think my gm adapter was flat no raised ridge but I could be wrong I would have to take it off to check but either way I guess I'll leave the gasket on it ? I'm just wondering if the gasket could come apart and get in the system why does GM still sale it ? I'm thinking it will be ok if I leave it but if anybody has had a bad experience I'd like to hear what happened , so for now I'm just leaving it there it has approximately 17hrs run time with it so not very much at all it's just weird that GM recommends it and all other company's don't as far as I can tell ,

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    Aquacraft Eddie's Avatar
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    Also very good observation about the gasket cutting off half the bypass area , I thought the same thing before I installed it but just figured that it came with it so what the hell but now I'm really wondering if I should just take it off , but it just bothers me that G.M. Recommends it if you ask the dealer so I just left it on there ,,,, also the gasket part that covers the bypass is constantly getting oil hitting it instead of the block not sure why they made it like that but not sure if that even matters either

  9. #7
    Senior Member ol guy's Avatar
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    FWIW. I have built many 265-454 engines and have never seen or removed a gasket between the block and adapter. If it were me I would toss it in the trash but first do alittle research. If not just for piece of mind but being sure of the build. M

  10. #8
    steelcomp was here
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    I never use the gasket. Take the adapter and lap it on something very flat with some 220 sandpaper. Use a little Permatex Aviation sealer when you install. Even if it leaks a little...so what?
    You're probably going to pull that little aluminum casting all out of shape when you tighten the filter. It's just not that critical. Make sure when you install it that the part where the bypass is points away from the oil passage in the block.
    Like this:



    Not like this:

    Last edited by scott foxwell; 09-28-2017 at 06:16 AM.
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    Aquacraft Eddie's Avatar
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    Thank you Scott !, well right now I have the bypass towards the block , I was planning on running it 1 more time this year and putting it away so if I don't get a chance to do it now I'll do it after the last run I'd say it should be ok , I'm going to the lake on Sunday and I'm working out of town right now so I may not get to it till Monday but thank you all for the advise ! Going to take it out and turn it around and throwing the gasket away ??

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    Aquacraft Eddie's Avatar
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    Also just curious , why does it matter to have the bypass away from the block ? Just wondering thank you .

  13. #11
    steelcomp was here
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    Quote Originally Posted by Eddie View Post
    Also just curious , why does it matter to have the bypass away from the block ? Just wondering thank you .
    It's just a flow thing from my eye's point of view given we have a choice. Probably doesn't amount to anything.
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    Quote Originally Posted by scott foxwell View Post
    It's just a flow thing from my eye's point of view given we have a choice. Probably doesn't amount to anything.
    Good catch Scott. I do that as well, but it slipped my mind to mention it.

    That is why I love forums like this where we share ideas and experience to try and help others, not stroke our ego. (Well maybe a little. LOL)

    Paul

  15. #13
    Senior Member ol guy's Avatar
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    Quote Originally Posted by scott foxwell View Post
    It's just a flow thing from my eye's point of view given we have a choice. Probably doesn't amount to anything.
    "ditto" it is a flow thing the orifice is the oil to the block and doesn't need obstruction. Good Call Scott. M

  16. #14
    steelcomp was here
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    Quote Originally Posted by ol guy View Post
    "ditto" it is a flow thing the orifice is the oil to the block and doesn't need obstruction. Good Call Scott. M
    Actually, and not to argue, but it's the oil passage from the block into the filter and probably doesn't amount to any difference at all. Like I said, though, it's just something my eye sees that can be "optimized".
    If God is your co-pilot, change seats!
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