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top end maint. replace/clean injectors? gaskets? sensors? hoses? what else?

Discussion in '1st Gen. Tacomas (1995-2004)' started by NightProwler, May 9, 2015.

  1. May 9, 2015 at 11:58 PM
    #1
    NightProwler

    NightProwler [OP] Well-Known Member

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    Harlan
    Maricopa, Az
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    '01 Prerunner, '03 cbr600rr, '09 R1
    Just discovered a coolant leak under the intake:(
    Coming from the back plate where the bypass tube comes from in behind y pipe.. So I'll be taking the top end off and fixing that, once I delve in and figure out where it's coming from.. Just wondering what else I should do while I'm in there. Never done this before so I'm sure it's gonna be an interesting job..

    So far I'm thinking:
    (Obviously) intake gaskets
    Valve cover gaskets
    Maybe getting injectors cleaned/replaced?
    Knock sensors/connectors?
    Freeze plugs? (Not sure if this is doable/necessary)
    Cleaning out entire intake and throttle body

    Anything else??
    I'm sure there's more.. Again I am new to tearing a motor down even if just the intake and want to know if there's anything else I should consider looking at. I'm sure it's not a fun job getting in there to begin with so I'd like to do as much as possible while I'm at it. Thanks:)
     
    Last edited: May 10, 2015
  2. May 12, 2015 at 7:04 AM
    #2
    JAGER91374

    JAGER91374 Well-Known Member

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    OME 883's and Dakars, OME Shocks, Gray Wire, Deck Plate, Blacked Out Chrome, RAT Skids, BAMF BPV Bracket, Toytec Diff Drop, Braided Extended Brake Lines Front and Rear, In-Dash Nav.
    Getting the intake off the 3.4 is pretty easy as it's 2 pcs so don't worry about that.

    The only other thing I can recommend is replacing all of the vacuum lines while you have everything torn down that far.

    Also take the time to clean all of the gunk out of the intake. Mine was caked with an oily carbon mess that had two of the runners restricted by about 25% right at the bend. Interestingly the truck ran fine but did seem slower than I remembered. I simply filled and old plastic tub with super clean and threw the intake pieces in and let it soak over night then hit it with a pressure washer. Good as new.

    Looking at it after everything was clean I noticed my intake ports were also seriously mismatched so I took a little time to port match them and get some of the casting rough spots out of the ports. Doubt it did anything but I can't leave that kinda stuff alone :)
     
  3. May 16, 2015 at 3:22 AM
    #3
    NightProwler

    NightProwler [OP] Well-Known Member

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    Sounds good. I certainly plan to do some major cleaning.. I'll look into new vacuum lines. Any suggestions on what to get? I know they make universal stuff at hardware stores, but I'm not sure if I wanna do that? Or dealer items, which I'm sure would cost a ton. Or maybe even some colored hoses such as blue, but I think those aren't cheap either. At least the ones I found a while back while browsing, think they were silicone...

    I was looking at this gasket kit too which I found in another thread:
    http://pages.ebay.com/motors/link/?nav=item.view&id=111553378788&alt=web

    Also wondering if I should do something with the injectors. Should I attempt taking them somewhere to be cleaned? Or just buy new ones? What brand if so? I suspect other performance issues so I figured I'd break down and do as much as possible and not have to worry about it again.

    Edit:found these injectors on eBay for $186 set of 6 aisin? Sounds like a good deal!
    http://pages.ebay.com/motors/link/?nav=item.view&id=301497414570&alt=web

    Also maybe the fuel pressure regulator. Suggested brand for this too?
    Edit:Found this one $86:
    Beck Arnley 158-0948 Fuel Pressure Regulator https://www.amazon.com/dp/B005BNXN4Q/ref=cm_sw_r_awd_wTYvvb0GMYEG0

    If it costs me an arm and a leg, oh well. At least it'll be done and tip top shape. Already did the timing belt and water pump kit. New exhaust.. only other thing I would be doing is new sensors perhaps. But not sure I'm even in need of them. Like maf, O2's, maybe tps and iac. But I have no reason to believe they are in need of replacing. Maybe the iac. I've cleaned it once. Suppose I could wait on that until I dismantle and see how she looks. Give her a good cleaning again..

    Let me know!! I'm very anxious to get this done and want to be sure I'm prepared and ready to tackle anything and everything. I can probly drop a good chunk of $ down her throat but don't want to buy anything unless it's worthwhile or preventative. Thanks.
     
    Last edited: May 16, 2015
  4. May 16, 2015 at 9:29 AM
    #4
    roehoe72

    roehoe72 Well-Known Member

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    As soon as I get my commuter car back up and driving i plan to do a major clean up too. If i we're you, id soak my intake like the last guy suggested. Ive read soaking your fuel injectors in seafoam works wonders. Don't bother with freeze plugs. Kinda a waste of time, if they dont look rusted out. Id also do vacuum lines cause that's relatively cheap. Just go with autozone or whatever.
     
  5. May 16, 2015 at 2:00 PM
    #5
    NightProwler

    NightProwler [OP] Well-Known Member

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    Alrighty well it sounds like I'm on the right track.. Here's a 2 page thread on ttora regarding my main issue, the internal coolant leak, if anyone's interested. Looks fun.. hoping it's an easy fix.
    http://www.ttora.com/forum/showthread.php?t=128424#/forumsite/21086

    So, should I get new knock sensors too? I know I'll need new connectors as apparently they just shatter when touched.

    And again, let me know about those injectors I listed. That's not a bad price I think and would rather just buy new ones. Rock auto doesn't seem to list either aisin or denso. What's oem?
     
    Last edited: May 18, 2015
  6. May 18, 2015 at 3:20 PM
    #6
    NightProwler

    NightProwler [OP] Well-Known Member

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  7. May 18, 2015 at 3:59 PM
    #7
    NightProwler

    NightProwler [OP] Well-Known Member

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    Harlan
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    '01 Prerunner, '03 cbr600rr, '09 R1
    Few more part checks if anyone could give me some shopping support:)
    Regarding the knock sensors; found these:

    connectors: http://www.ebay.com/itm/GENUINE-TOYOTA-KNOCK-SENSOR-HARNESS-4Runner-1995-2002-T100-1992-1998-/331220882056?fits=Model:Tacoma|Engine+-+Liter_Display:3.4L&hash=item4d1e4d9288&vxp=mtr

    sensors:
    DENSO ($93 each!?): http://www.ebay.com/itm/OE-DENSO-TOYOTA-LEXUS-KNOCK-SENSOR-89615-12040-GENUINE-TOYOTA-DENSO-Part-/370732013418?fits=Model:Tacoma|Engine+-+Liter_Display:3.4L&hash=item565159976a&vxp=mtr

    ISUMO
    brand(?): ($22) http://www.ebay.com/itm/2-Pcs-of-KNOCK-SENSOR-Fits-LEXUS-TOYOTO-GEO-/171283529480?fits=Model:Tacoma|Engine+-+Liter_Display:3.4L&hash=item27e14b3f08&vxp=mtr


    The connector harnesses seem to be legit. Not sure on the knock sensors though. Certainly dont wanna pay almost $200 for two damn sensors... Would it hurt to get those off brand ones?? And if anyone's got any input still on the above posts (post#3) like the pressure regulator/injectors, I'd greatly appreciate it before I start ordering everything up:)


    EDIT: couple more parts I forgot to list
    Fel-Pro Ms95898 Manifold Gasket Set
    http://www.ebay.com/itm/231558968519

    TOYOTA OEM 2221562180 Fuel Injection Idle Air Control Valve Gasket
    http://www.ebay.com/itm/251948434118
     
    Last edited: May 18, 2015
  8. May 19, 2015 at 8:07 PM
    #8
    NightProwler

    NightProwler [OP] Well-Known Member

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    Anyone? got any input for me on the parts I listed??;)
     
  9. May 20, 2015 at 11:37 AM
    #9
    frizzman

    frizzman Well-Known Member

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    OME 3", Tundra 17's, Cooper S/T Maxx 255/75-17, hitch w/ 7-pin, Leer cap, JVC head unit w/BT, LED lights
    I think I have an IAC gasket that i didn't need (I have an 04 and no IAC) I'll check tonight and see if I still have it
     
  10. May 20, 2015 at 1:06 PM
    #10
    NightProwler

    NightProwler [OP] Well-Known Member

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    Ha it's alright on that, its like $5 new. Thx tho!
     

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