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Technical sbc switching oil pans and gaskets

Discussion in 'The Hokey Ass Message Board' started by scrap metal 48, Jun 12, 2020.

  1. scrap metal 48
    Joined: Sep 6, 2009
    Posts: 5,929

    scrap metal 48
    Member

    I purchased a rebuilt older sbc(early 350 I think) with the oil dipstick on the driver's side going through the block, not the pan.. The idiot put a chrome oil pan on the rebuild and of course it leaks(badly).. My question is; I have a good almost new GM pan but has a dipstick cutout on the passenger side of the pan and I'm wondering if I can use it on my rebuilt engine.. I don't need a pan with any cutout because the dipstick goes through the block on the driver's side.. I'm just wondering if I use the GM pan, will the gasket just cover up the dipstick hole I don't need.. I hope some of this makes sense to you sbc engine guys.. Thanks in advance for any help....
     
  2. squirrel
    Joined: Sep 23, 2004
    Posts: 46,104

    squirrel
    Member

    The pan for the early engines has an "outie" that clears the dipstick....

    you need the correct pan
     
  3. scrap metal 48
    Joined: Sep 6, 2009
    Posts: 5,929

    scrap metal 48
    Member

    Thanks squirrel, I just went out and checked, sure enough has an outie on the drivers side... Guess I'll be buying a new pan... Shit
     
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  4. Ted Chandler
    Joined: May 25, 2020
    Posts: 24

    Ted Chandler
    Member

    I have scuffed the chrome on the mounting surface with scotchbrite and then used the 1 piece felpro gasket with good results. Just another option.
     
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  5. 1934coupe
    Joined: Feb 22, 2007
    Posts: 3,922

    1934coupe
    Member

    I do believe that the lower dip stick tube will not clear that pan. If you don't run that lower tube you run the risk of the dip stick not going straight into the pan and possibly hitting the crank. Your choice.

    Pat
     
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  6. scrap metal 48
    Joined: Sep 6, 2009
    Posts: 5,929

    scrap metal 48
    Member

    Which one piece oil pan gasket do I need...
     
  7. Ted Chandler
    Joined: May 25, 2020
    Posts: 24

    Ted Chandler
    Member

    https://www.summitracing.com/parts/fel-1885
    This is the gasket for pre 1975 sbc engines with the thin lip at the front. Now, with an aftermarket pan, you will probably need to measure the front cutout in order to know if the thin or thick gasket is required.
     
  8. 54vicky
    Joined: Dec 13, 2011
    Posts: 1,341

    54vicky
    Member

    do not forget the timing chain seal to match as they are different.
     
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  9. Country Joe
    Joined: Jan 16, 2018
    Posts: 198

    Country Joe
    Member

    Ericnova77 posted this picture on another thread. Be sure to measure your new pan before ordering the one piece gasket.
    OilPanSealMeasure640.jpg
     
  10. scrap metal 48
    Joined: Sep 6, 2009
    Posts: 5,929

    scrap metal 48
    Member

    I just started my engine for break in and at the end of 20 minutes I had a pretty good oil leak(OK, massive).. I haven't taken the pan off yet, but that's where all the oil is coming from.. I know they used the 4 piece seals and the aftermarket chrome pan.. It's probably a combination of wrong pan, gasket and seal.. I'll take the pan off Monday and see.. Good information so far.. Stay tuned....
     
    Last edited: Jun 14, 2020
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  11. 47ragtop
    Joined: Feb 8, 2007
    Posts: 663

    47ragtop
    Member

    If you also have the el cheap chrome timing chain cover throw that POS away along with the oil pan. Ask me how I know. Later Bill
    . .
     
  12. scrap metal 48
    Joined: Sep 6, 2009
    Posts: 5,929

    scrap metal 48
    Member

    It has a stock timing cover...
     
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  13. VANDENPLAS
    Joined: Dec 14, 2009
    Posts: 2,372

    VANDENPLAS
    Member

    I thought the chrome oil pans and timing covers where freebies when purchasing anything over $19.99 at the swap meet !!

    they are all junk. I have had luck scuffing the ..., ahem ..... “ chrome “ straightening the sealing surface and using a gasket with either gasket glue, gasket shellac or a thin bead of silicone along with a gasket.
     
  14. 54vicky
    Joined: Dec 13, 2011
    Posts: 1,341

    54vicky
    Member

    if all else fail use a bigger fuking hammer.then paint it flat black
     
  15. Ted Chandler
    Joined: May 25, 2020
    Posts: 24

    Ted Chandler
    Member

    I really hate that OS-34510-T gasket, it is "universal" for either side dipstick! The unused side just looks like a great place to develop a leak to me. Here is the Felpro number that is for driver side dipstick with a thick front lip #1880
     
  16. scrap metal 48
    Joined: Sep 6, 2009
    Posts: 5,929

    scrap metal 48
    Member

    WELL,,, after taking off the front exhaust pipes because I'm running a crossover pipe and removing the passenger tie rod running under the oil pan, I got the oil pan off... It has a one piece gasket that fits the block fine, however when I lay it on the cheap-ass oil pan it doesn't fit the front of the pan unless you push down on it and then it pulls the side of the gasket away from the holes.. I think Country Joe has the answer.. The oil pan is the wrong one.. The pan I have shows 2 3/8" at the front gasket cut out and I need an old one with 2 1/4" at the front of the pan.. Does anybody have a part# for a stock GM oil Pan, drivers side dipstick for a 1970 350 engine?? Again, thank to everybody thats tried to help... Maybe I'll get my latest project on the road this summer...
     
  17. Country Joe
    Joined: Jan 16, 2018
    Posts: 198

    Country Joe
    Member

    I posted that picture to show how to determine if you need a thin or thick front seal. But I would go with the gasket Ted Chandler suggested with the single dip stick provision.
     
  18. scrap metal 48
    Joined: Sep 6, 2009
    Posts: 5,929

    scrap metal 48
    Member

    If I change the gasket to fit the pan I have then it won't fit the block.. The one piece gasket I have now is virtually new and fits the timing cover fine and only has one hole for the dipstick..The pan is shit, so I'd rather buy a new Pan with a 2 1/4" depth at front(like an original is).. Then the gasket will fit both the pan and the block... I just don't know how to buy the right pan.. When looking online, the don't list the front depth like you^^^ showed in your post....
     
  19. Ted Chandler
    Joined: May 25, 2020
    Posts: 24

    Ted Chandler
    Member

    The 2 1/4" pan was used prior to 1975. In the aftermarket, it may be really tough to know what you are getting before you measure it yourself. That is why there are so many different gaskets. You'll get it! At least you figured out why there is a leak!
     
  20. scrap metal 48
    Joined: Sep 6, 2009
    Posts: 5,929

    scrap metal 48
    Member

    Thanks Ted.. At least now I know I need a 1974 and older pan...
     
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  21. scrap metal 48
    Joined: Sep 6, 2009
    Posts: 5,929

    scrap metal 48
    Member

    Well I couldn't find the correct older pan so I did a little research and decided the old original style pan took a thin gasket and the new style pan(1975-1979) took a thick gasket.. My leak problem was a new style(1975-1979) pan with the old style one piece gasket.. I just received a thick style gasket in the mail and trial fit it to the pan and it fits well.. I'm pretty sure that was my massive leak problem, so I'll get the old chrome pan and new gasket on this weekend and hopefully NO more leak.. I'll also adjust the noisy valves and fix the exhaust leak and will get to go for it's first test drive... I'm excited....
     
    Last edited: Jun 20, 2020
  22. scrap metal 48
    Joined: Sep 6, 2009
    Posts: 5,929

    scrap metal 48
    Member

    Just wanted to thank everyone for their help and suggestions... You think you know everything until you don't... Will post some pics once it's on the road, thanks again.....
     
    lothiandon1940 likes this.
  23. Just glad that it all worked out for you.
     
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  24. scrap metal 48
    Joined: Sep 6, 2009
    Posts: 5,929

    scrap metal 48
    Member

    Finally got the new pan gasket on and fixed all the leaks and drove it around the block today.. Had to have a beer to celebrate, at 9 AM....
     
  25. Bandit Billy
    Joined: Sep 16, 2014
    Posts: 6,528

    Bandit Billy
    ALLIANCE MEMBER

    upload_2020-6-30_12-14-17.png
    Glad you got 'er done! Cheers!
     
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  26. chargin03
    Joined: Jan 8, 2013
    Posts: 429

    chargin03
    Member

    Beat it to fit and paint it to match.
     
  27. 54vicky
    Joined: Dec 13, 2011
    Posts: 1,341

    54vicky
    Member

    happy for you
     
    scrap metal 48 likes this.

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