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  1. #1
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    Default Cylinder Head Casting Numbers ?

    2000 Buick LeSabre w/ 3800 Series II V6.

    Where can I find the casting number for the rear cylinder head ?

    Please don't tell me I have to pull the rear valve cover.

  2. #2
    Killa Bee Scottydoggs's Avatar
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    Default Re: Cylinder Head Casting Numbers ?

    why would you need the casting #? not thats theres a ton of info to be had off it, iirc its just got the year on it. if you need a head, any 3800 na head will work.

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, 3.0, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned by me. https://goo.gl/gpV5kW

  3. #3
    GXP Level Member GTPpower's Avatar
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    Default Re: Cylinder Head Casting Numbers ?

    Yes, you have to pull the valve covers.

    2001 GTP - cam, headers, nitrous, stock trans - 11.83 @ 116 <$2k in mods - sold
    2005 F350 6.0 - studded, deleted, bulletproofed, tuned
    1966 Olds Cutlass 442 Convertible
    2000 Chevy Silverado 2500 6.0l

  4. #4
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    Default Re: Cylinder Head Casting Numbers ?

    Scottydoggs - I need the casting number to get the correct cylinder head, correct ?

    GTPpower - I gotta pull the alternator and belt tensioner to get the rear valve cover off.

  5. #5
    Turbo is the way to go. Fivefingerdeathpunch's Avatar
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    Default Re: Cylinder Head Casting Numbers ?

    Any cylinder head from basically 97-08 that was on a NA 3800 would bolt right on to your car.

    Supercharged heads look different because the injector holes are cast into them.

    SMGPFC Member #1

  6. #6
    Killa Bee Scottydoggs's Avatar
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    Default Re: Cylinder Head Casting Numbers ?

    Quote Originally Posted by J7319M View Post
    Scottydoggs - I need the casting number to get the correct cylinder head, correct ?

    GTPpower - I gotta pull the alternator and belt tensioner to get the rear valve cover off.
    you'll be taking it off to change the head. like stated, any n/a head will work. whats the back story here? why the head swap?

    if it hydro locked the upper intake failed and leaked coolant into the cylinders and or oil as it always does.

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, 3.0, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned by me. https://goo.gl/gpV5kW

  7. #7
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    Default Re: Cylinder Head Casting Numbers ?

    Quote Originally Posted by Scottydoggs View Post
    whats the back story here? why the head swap?
    How much time do you have ? I was changing the intake manifold gaskets when I got the bright idea to chase the bolt holes in the cylinder heads to clean them up. Usually that's not a bad idea if a person uses the correct size tap. The correct size tap in this case would be 5/16"-18. The tap that was used by the most idiotic person in the world was an 8mm X 1.25mm. So by time I started on the third hole, I finally realized that metal shavings are not supposed to be coming out of a threaded hole if it's just being chased. So now with 3 holes in the rear head severely damaged, I order a Time-Sert kit from Amazon. That would've worked fine if I was able to drill the holes at the correct angle. Two of them I got pretty close, but one was way off. So in my vested interest to punish myself for being so stupid, I'm going to replace the rear cylinder head.

  8. #8
    Killa Bee Scottydoggs's Avatar
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    Default Re: Cylinder Head Casting Numbers ?

    oh lord, thats a bad story.

    be best to hit up a junk yard and snag a head off any 3800 thats na. you can grab the front head thats easier to take off, same head.

    you also need new head bolts.

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, 3.0, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned by me. https://goo.gl/gpV5kW

  9. #9
    Killa Bee Scottydoggs's Avatar
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    Default Re: Cylinder Head Casting Numbers ?

    and you'll want to watch some you tube vids on valve lapping. your gonna need to do that, when cars sit the valves get rusty and pitted up, sure it will run, but it could run even better if the valves all seal like they should.

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, 3.0, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned by me. https://goo.gl/gpV5kW

  10. #10
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    Default Re: Cylinder Head Casting Numbers ?

    I just want to find a head that's never been remanufactured. I want a head that's never had anyone attempt to repair any of the threads. I'm thinking a salvage yard is the only place to find that. Being as particular as I am, I'd go to a self pull yard and pull it myself. If I find a good one, I'll have it looked at by a machinist.

  11. #11
    Killa Bee Scottydoggs's Avatar
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    Default Re: Cylinder Head Casting Numbers ?

    no one chases lim bolts in the heads, so those will be just fine, some times they are whole engines, some times they are part torn down, never know what your gonna find walking the lanes of cars.

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, 3.0, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned by me. https://goo.gl/gpV5kW

  12. #12
    GT Level Member wowitsfast's Avatar
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    Default Re: Cylinder Head Casting Numbers ?

    check this out http://www.rockauto.com/RSS/vehiclef...l=en&html=true get what you need for the swap
    Just a bunch of junk thrown together http://www.grandprixforums.net/threa...shes-a-runner)

  13. #13
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    Default Re: Cylinder Head Casting Numbers ?

    Most of the time by time I get there, the entire engine and trans is gone. Hopefully this time I can get there there before the big parts giants get there.

    Scottydoggs - do you happen to know the size of the lower intake manifold bolts ?

    I know they're 5/16"-18 with a 3/8" hex flange head, but I don't know the length.
    Last edited by J7319M; 6 Days Ago at 09:51 PM.

  14. #14
    GXP Level Member ItHurtz's Avatar
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    Default Re: Cylinder Head Casting Numbers ?

    Reuse the intake bolts, you need new HEAD bolts

  15. #15
    Killa Bee Scottydoggs's Avatar
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    Default Re: Cylinder Head Casting Numbers ?

    no idea, i like his idea, snag the bolts from the jy.

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, 3.0, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned by me. https://goo.gl/gpV5kW

  16. #16
    GrandPrix Junkie
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    Default Re: Cylinder Head Casting Numbers ?

    Where in the USA are you? I have a head from my old 00 GP GT motor (N/A Series II) that's good. Never been messed with just pulled it off my old motor. Shipping could be an issue though if you're too far out. Has around 150K on it but never had an issue with it.

  17. #17
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    Default Re: Cylinder Head Casting Numbers ?

    FordMan77 - I'm in Clovis California. That head sounds very interesting. Why would you have just one ?

  18. #18
    GrandPrix Junkie
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    Default Re: Cylinder Head Casting Numbers ?

    Well, technically I have both from my original motor but the #1 cyl. ate a bolt and turned it into a 5 cyl. (don't ask, lol..) I never bothered to look at the valve on that head since I needed a new motor after that anyway so I don't know what shape it is in. I just yanked the motor and replaced it then later on I pulled everything off the old motor down to the shortblock so I could scrap it. I'll look for the good head tonight if you would like, just let me know. I can ship though UPS at my work but I can't imagine it being cheap.

  19. #19
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    Default Re: Cylinder Head Casting Numbers ?

    That sounds real interesting FordMan. The salvage yard here charges $39.99 + $4.99 core charge. I haven't priced machine work yet. It would be nice if I found one that was so sweet, all it needed is cleaned up and new valve seals installed. Is there any chance you can snap a picture ? No damaged or repaired threads, correct ?

  20. #20
    GXP Level Member ItHurtz's Avatar
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    Default Re: Cylinder Head Casting Numbers ?

    Its gonna cost you $40-50 either way more than likely. Machine work for what, clean it up and run it.

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