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Thread: Head gaskets
          
   
   

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  1. #1
    dave350v8 is offline CHR Member Visit my Photo Gallery
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    Head gaskets

     



    Hi, im just swapping my heads on a 350 sbc, By mistake I bought the felpro gaskets 1004 which is for a 400 sbc. Can I use them? I live in the UK so I would have to wait to get the new ones sent over here!
    The 350 gasket is 4.166
    The 400 gasket is 4.190 !!

    Thanks in advance!

  2. #2
    pepi's Avatar
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    As long as the ports and bolt holes match, which am pretty sure will. I see no reason for them not to work. Consider the extra thickness a plus, torque the bolts to 25 lb and recheck after first heat cycle.
    I have two brains, one is lost and the other is out looking for it

  3. #3
    dave350v8 is offline CHR Member Visit my Photo Gallery
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    Hi, im concerned regarding the bore size! the thickness is the same, does anyone know?
    Torque the headbolts to 25lbs?
    Last edited by dave350v8; 08-05-2012 at 07:59 AM.

  4. #4
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  5. #5
    dave350v8 is offline CHR Member Visit my Photo Gallery
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    I think that link refers to using a 1003 gasket on a 400 motor. I have the 1004 (400) gasket and want to fit it to a 350!
    So I was wondering if the bigger bore on the gasket would give me issues?
    Last edited by dave350v8; 08-05-2012 at 08:12 AM.

  6. #6
    cffisher's Avatar
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    I always thought Chevy heads torque to 60 or 70 #.. You better look it up 25# seem like intake and I think they are around 35#.
    Charlie
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  7. #7
    dave350v8 is offline CHR Member Visit my Photo Gallery
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    I thought heads were torqued to 65lbs as well,my main concern is the gasket bore size being 0.024 thou bigger than it should be!

  8. #8
    rspears's Avatar
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    Maybe Pat or Jerry can provide some guidance on the gasket application.
    Last edited by rspears; 08-05-2012 at 12:23 PM.
    Roger
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  9. #9
    dave350v8 is offline CHR Member Visit my Photo Gallery
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    Can Pat or Jerry help me on this?

  10. #10
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    You're fine - 1004 is actually specified for 350 - check out this link:

    Fel-Pro Q1004 - Fel-Pro Performance Head Gaskets - Application - SummitRacing.com
    "Where the people fear the government you have tyranny. Where the government fears the people you have liberty." John Basil Barnhil

  11. #11
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    Double post - opps..
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  12. #12
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    You'll be fine with the slightly larger diameter gasket.
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  13. #13
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    biggest dealie about the 400 gaskets is the steam holes(2 small holes between the cylinders) shouldn't use 350 gaskets on a 400---------

    And DON"T use LT1 reverse cooling gaskets on a normal sbc of any size

  14. #14
    dave350v8 is offline CHR Member Visit my Photo Gallery
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    thanks everyone for the information!

  15. #15
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    Very sorry for the miss info I somehow thought you were talking exhaust manifold, talk about an off day more coffee please.
    I have two brains, one is lost and the other is out looking for it

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