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Doug Thorley LT header install on 2012 Tacoma issues

Discussion in '2nd Gen. Tacomas' started by armyoffoo, Jun 30, 2012.

  1. Jun 30, 2012 at 2:09 PM
    #1
    armyoffoo

    armyoffoo [OP] Scrotie McBoogerballs

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    I received new DTLT headers for my 2012 Tacoma but have an issue. The manifold studs on the top are too long for the DTLT header flange to be held on by the nut. Has anyone else had this issue with their install? For now I will tighten the lower nuts and use washers on top to fill the space up to the threads. Maybe I am missing pieces?
    [​IMG]

    [​IMG]
     
  2. Jun 30, 2012 at 3:50 PM
    #2
    armyoffoo

    armyoffoo [OP] Scrotie McBoogerballs

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    Installed the passenger side with only the bottom nuts on, was planning on spacing out the top nuts with washers but the air injection tube is in the way. No way to secure the top unless I put the nut on and tighten it against the tube, which I'm not going to do. Oh well, hours down the drain and I still have to put the stock back on :mad:

    [​IMG]
     
  3. Jun 30, 2012 at 7:21 PM
    #3
    armyoffoo

    armyoffoo [OP] Scrotie McBoogerballs

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    I replaced the top 3 studs with shorter studs that I got from AutoZone. They are a little longer than the bottom studes, but they work!! Passenger side is done, on to the driver's side.
     
  4. Jun 30, 2012 at 7:23 PM
    #4
    whippersnapper02

    whippersnapper02 Well-Known Member

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    I was going to say to order some ARP stubs.
     
  5. Jun 30, 2012 at 7:41 PM
    #5
    Steves104x4

    Steves104x4 Well-Known Member

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    BUCKLE UP! It makes it harder for Aliens to pull you out of your Truck.
    Nice of them to tell you that.
     
  6. Jun 30, 2012 at 8:53 PM
    #6
    armyoffoo

    armyoffoo [OP] Scrotie McBoogerballs

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  7. Jun 30, 2012 at 9:07 PM
    #7
    armyoffoo

    armyoffoo [OP] Scrotie McBoogerballs

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    I wouldn't say that, they fit great once you swap out the studs. Everything lines up nice with the collectors and air injection system and whatnot. Just definitely not a easy swap like they were on my 2006. It would have been nice if they included replacement studs or at least documented that replacing the studs would be necessary.
     
  8. Mar 29, 2013 at 7:54 AM
    #8
    Orion78717

    Orion78717 New Member

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    I just received my Doug Thorley headers for my 2012 Tacoma. Could you please tell me what size the manifold bolts were that you had to replace? I obviously need to get those before the install. These forums are great for this type of information.
    Thanks!
     
  9. Apr 29, 2013 at 9:35 PM
    #9
    ETaco23

    ETaco23 Marshall offroad Fabrication

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    I need to know what size studs i need also. I just ordered some headers as a bday gift. :)
     
  10. Aug 1, 2013 at 4:36 AM
    #10
    ezemanf

    ezemanf Member

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    Do you remember what size the Header bolts you used are. I am going through the same problem with my 2012 Tacoma.:help:
     
  11. Aug 1, 2013 at 8:04 AM
    #11
    STiLL WILL

    STiLL WILL MY NAME ISN'T WILL

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    I (well, my mechanic technically) didn't go the shorter stud route for the DTLT's on my '13.

    We left the bottom studs in tact and replaced the top studs with high grade bolts and lock washers from HD. Once you yank out the top studs using a Torx socket, you can figure out just what length you'll need for bolts.

    ...or shorter studs will work just as well.

    The air pump rails are a dead giveaway that you have the proper headers built for 2012+ Tacomas.

    Fitment was REALLY good once you get the headers mounted. Everything lines up beautifully: nice and flush with the heads and the y-pipe flanges line up spot on.

    Wish Thorley would throw in that last 5% effort and either include replacement bolts & lock washers -or- shorter studs for the tops of these headers. Hell, even disclosing "you will need xxxxx hardware for the top of these manifolds" in their instructions would help.

    Thorley makes a great product, they just half ass on the details. *sigh*
     
  12. Aug 1, 2013 at 8:57 PM
    #12
    JustAddMud

    JustAddMud Professional Grease Monkey

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    I swapped out my stock headers for the long tubes a while back. The way I handled the long stud issue was to swap out the longer studs with bolts:

    • 6, M8-1.25 x 30 bolts
    • 6, 8mm lock washers
    • 6, 8mm flat washers
    Ive since put about 5k miles or so with no issues. I put the lock washer on first, followed by the flat washer.


    -J

    Shameless plug of my 2012 DTLT install guide >.<
    http://www.tacomaworld.com/forum/2n...ow-2012-complete-dtlt-urd-y-pipe-install.html
     
  13. Aug 4, 2013 at 12:14 PM
    #13
    ezemanf

    ezemanf Member

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    Thanks guys! I really appreciate the quick responce. I called DT to get the header bolt size and ordered them through Fastenal. They will finally be in Monday. At least I know now that I can used regular bolts with washers if the bolts I ordered do not fit. Can't wait until the DTLT's are finally installed after a long 7 days of waiting...
     
  14. Aug 4, 2013 at 12:47 PM
    #14
    ezemanf

    ezemanf Member

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    I agree Matt. With the money we pay for the headers, DT should provide complete instructions stating that there are extra hardware not included with the package.
     
  15. Aug 4, 2013 at 3:48 PM
    #15
    Gadget@URD

    Gadget@URD Well-Known Member Vendor

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    I am sorry to hear you received a set of headers that were miss packaged by Doug Thorley.

    There are supposed to be 6 new bolts to replace the upper studs, but it seems a few have gotten out there were miss packaged by DT.

    G
     
  16. Aug 4, 2013 at 9:57 PM
    #16
    ETaco23

    ETaco23 Marshall offroad Fabrication

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    I got my shorty headers with all new bolts.. But you cant use the supplyed bolts on the top because there's no way in hell you can thread and tighten the bolts down.
    The best thing to do is use there new supplyed bolts on the bottom and move the shorter studs (the bottom studs) to the top. It works perfectly!

    DT really screwed up on the 12-13 shorty headers. They didnt line up at all with cats. And were you you have to cut the old headers off is different than previous years. I had to do some custom fab work in order to make them work..
     
  17. Aug 4, 2013 at 11:34 PM
    #17
    STiLL WILL

    STiLL WILL MY NAME ISN'T WILL

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    As much as I want to believe DT has sent out a few "mispackaged" headers out with missing hardware, my own experience tells me otherwise. It's either they don't really care to fix the mispackaged headers or they need to spend more time getting a cohesive package out to the customer. No one wants to pay for an incomplete product.

    My experience(dealing with DT '12-'13 headers)

    I initially ordered '12-'13 short tube DT's directly from Thorley headquarters in Corona, CA via phone order. PRIOR to finalizing my order I asked if they came with bungs welded and the guy checks the "hardware supplied" and says: "looks like they're not listed so they SHOULD BE welded on."

    Got them 2 days later, no bungs welded on...not even bungs packed loose! Called DT headquarters to ask why weren't there bungs welded on, and this gentleman said "hmm we SHOULD HAVE sent them loose with the headers." So I ask him "So which is it? Shouldve been welded on or sent loose??!" He hmmms for a few seconds then asks for my number so he can "consult with his engineers" and call me back first thing next morning. I didn't get a call back so I guess we'll never know seeing as I got 2 different answers from the manufacturer directly. :rolleyes:

    After mulling it over, I decided to return the short tube headers and go with long tube DT headers instead. I just couldn't justify professional installation costs of shorties.

    Ordered the DTLT's this time via URD website. I get them, and replacement hardware for the top studs were NOT included(as Gadget noted above they should have been). Again, missing hardware from DT---twice now. I couldn't wait any longer so I decided to grab the hardware myself @ Home Depot.

    It appears to me that there is still half assing or negligence going on at DT's packaging/development department, but either way I was not happy with the lack of hardware from the same manufacturer in both of my orders.

    Like I stated before...great product, but isn't always 100% ready to go when it lands at the customer's door.

    2012+ Tacoma owners, heads up.
     
  18. Aug 5, 2013 at 7:35 AM
    #18
    ETaco23

    ETaco23 Marshall offroad Fabrication

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    Yeah, my bungs werent in the package either... I just got a local exhaust shop to sell me the bungs and drilll out for them. I did all the welding myself..
     
  19. Aug 5, 2013 at 7:44 AM
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    blm

    blm Well-Known Member

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    Think if I was going to the trouble of replacing the studs I would replace them with the header locking bolts instead of the studs. A common problem with headers is frequent loosening/leaking at the junction of the header and the engine block. locking bolts prevent this. Just my 2 cents.
     
  20. Aug 5, 2013 at 7:12 PM
    #20
    ezemanf

    ezemanf Member

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    Finally got the DTLT's installed today. Sounds good until you hit the higher Rpm's then it gets very raspy. Guess I will have to purchase a resonator and hopefully that will ease the rasp a bit. Overall satisfied with the gains I received and the deep sound the system provides
     
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