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Sanderson header question...

Discussion in 'The Hokey Ass Message Board' started by Styleliner, Aug 19, 2013.

  1. Styleliner
    Joined: Apr 9, 2013
    Posts: 180


    Just recieved some headers from sanderson for my 49 chev v8 switch, the instructions say no gaskets necessary, just a 1/8 bead of silicone. Has anyone had any experience with these? Should I fudge the instructions and put gaskets in? It goes against my mojo to not use gaskets but if someone here says its all good, i'll try it.
  2. Wow. That's the second most strangest thing I've heard in header instructions. I'm gonna stand by and wait for the answer here.

    Posted from my office while pretending to work!
  3. Do what the instructions works. Just make sure you use a liberal amout of silicone and, very important, allow it to thoroughly cure before you fire the engine.
  4. verno30
    Joined: Aug 25, 2008
    Posts: 1,090


    I bought the same set but didn't get instructions. I used dead-soft copper gaskets and had success. Not using gaskets seems odd to me. Kudos to those that have pulled it off but I think maintenance woudl be a PITA later on down the road.

  5. 2racer
    Joined: Sep 1, 2011
    Posts: 960


    sounds like a bad idea, use some quality gaskets
  6. GassersGarage
    Joined: Jul 1, 2007
    Posts: 4,727


    I used regular header gaskets and it worked fine.
  7. KIRK
    Joined: Nov 17, 2005
    Posts: 384


    I used the stuff they recommend when I installed mine on aluminum heads on a sbc. Ran it 5 years with no leaks or trouble. When I pulled it down for a rebuild I did use gaskets and that worked well too. I think either way is good. Gaskets are easier however.
  8. gimpyshotrods
    Joined: May 20, 2009
    Posts: 19,237


    I don't run header gaskets. I have not in about 10-years. Probably 45-50 installs, no issues. Silicone works just fine.
  9. I used the copper gaskets with the Stage 8 fasteners, no problems.
  10. I'm running copper permatex and have no problems.......lots of new cars run no gaskets as long as the surface is straight.
    Last edited: Aug 19, 2013
  11. slddnmatt
    Joined: Mar 30, 2006
    Posts: 3,682


    I use Permatex's ultra copper. no issues..
  12. greybeard360
    Joined: Feb 28, 2008
    Posts: 1,848


    I just put a set of zoomies from them on a T Bucket..... I have used copper RTV in the past along with gaskets to seal some tough ones up, but NEVER heard of using black RTV. I was hesitant, sceptical and puzzled..... all at the same time.

    I applied the RTV, let them set over night and installed them. Been a month now, no leaks.

    I am amazed.

    But, I will say this. It is more the quality of the flanges, the thickness and the welds and the flatness they are ground down to, more than just using RTV. I have a feeling these things would seal fine without the RTV.... much like many car manufaturers that don't use gakets on their exhaust manifolds.

    I will say I put a set on a SBC in a 40 Chevy 4 years ago using Mr. Gasket header gaskets and they have never leaked either.
  13. Don's Hot Rods
    Joined: Oct 7, 2005
    Posts: 8,319

    Don's Hot Rods
    from florida

    I tried their method and got leaks, so I now run header gaskets and every couple of years change them out as they get hard from heat and age. But they do seal well that way.

    I use the copper ones on the header caps because I uncap mine a lot and the copper ones last forever and seal well.

  14. tfeverfred
    Joined: Nov 11, 2006
    Posts: 15,792

    Member Emeritus

    Doesn't installing gaskets void their warranty?
  15. Styleliner
    Joined: Apr 9, 2013
    Posts: 180


    Thanks for all the great input guys. I think I'll follow sandersons instructionsand keep watch. Against my better judgement.
  16. Styleliner
    Joined: Apr 9, 2013
    Posts: 180


    By the way, the warranty states that it would be void due to "improper installation" . Whether or not this means using gaskets when the instructions called for black rtv... I cant be certain.
  17. tfeverfred
    Joined: Nov 11, 2006
    Posts: 15,792

    Member Emeritus

    I'd call them to make sure. Couldn't hurt.
  18. Bobjoe
    Joined: Jul 8, 2007
    Posts: 42


    I been running Sanderson zoomies some 5 years. 3 different motors. No probs. Always silicone. good luck.
  19. hotrodj54
    Joined: Jun 1, 2007
    Posts: 631


    i used their headers on a 302 in my 54 ford, i didnt like the idea of silicone so i used stock manifold gaskets, been 10 years and no leaks or troubles.....john
  20. captmullette
    Joined: Oct 15, 2009
    Posts: 1,929


    did what they said, no issues at all, damn a leaking gasket
  21. 59 brook
    Joined: Jun 12, 2005
    Posts: 1,017

    59 brook

    sanderson cast iron headers on my wagon jet coated 12+ yrs now never had a gasket, silicone or leak. still look like new. the header flange is 3/8" thick
  22. '51 Norm
    Joined: Dec 6, 2010
    Posts: 753

    '51 Norm
    from colorado

    I had a set of headers on an OT car that would not seal even with double gaskets. In desperation I tried the silicone and it worked. I was amazed.
  23. upspirate
    Joined: Apr 15, 2012
    Posts: 2,282


    I kept blowing gaskets on cheap set of block huggers on my SBC,
    Used hi-temp silicone small bead on both sides of new gasket and no leaks.

    I was told to use it when I installed headers on a 2.3 Ford that had small holes in the head for air injection tubes from the stock manifold otherwise a gasket/header won't seal,so I filled the holes direct into the exhaust port,and never had a leak in 4 yrs 60K miles
  24. JoeyP.
    Joined: May 19, 2013
    Posts: 159


    I installed sanderson headers on a 289 just like the instructions said with silicone, so far so good.
  25. '51 Norm
    Joined: Dec 6, 2010
    Posts: 753

    '51 Norm
    from colorado

    the engine that I had trouble with the header leaking was also a 2.3 ford. Now I'm wondering if the problem was air injection holes in the head, something that I never considered.
    The silicone lasted until I sold the car and after that it was no longer my problem.
  26. Well, I guess you can't have a leaky gasket if you don't use a gasket. Sounds like I need to try this when I get the mill back in the wagon. Damn gaskets anyway
  27. DaddyO's..Deuce
    Joined: Jul 31, 2011
    Posts: 782

    from Missery

    I've used the copper silicone and nothing else for years, have never had a leak yet. 8 yrs on a set of hooker super comps on my chevy II and 8 yrs on a set of sanderson lakesters. Just a good bead, bolt them on and let them sit over night before you fire it up.

    Posted using the Full Custom H.A.M.B. App!
  28. Smilin Jack
    Joined: Nov 8, 2010
    Posts: 465

    Smilin Jack

    I used hi temp red silicone and no gaskets on a 472 Cadillac with home brewed headers and it worked perfectly.
  29. Thaplumbr
    Joined: May 7, 2012
    Posts: 119


    The silicone recommended by them,and the instructions followed like I got um on my flathead,worked like a champ!!
  30. CNC-Dude
    Joined: Nov 23, 2007
    Posts: 979


    Its a patented flange design that eliminates the need for a gasket.

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