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Questions about head gasket repair

Discussion in '1st Gen. Tacomas (1995-2004)' started by 5000fingers, Jun 2, 2018.

  1. Jun 2, 2018 at 7:34 AM
    #1
    5000fingers

    5000fingers [OP] Active Member

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    Bruce
    Bay Area, CA
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    I have a '95 Tacoma with the V6, and have recently confirmed a coolant leak into at least one of my cylinders (brown goo in the coolant, white steam in the exhaust, bubbly steam sounds from my heater core, all of the classic symptoms).

    I'm wondering what I'm likely to find when I pull the heads off, and also if there is any other work I should be doing while the heads are off, other than resurfacing the heads. With 200K on the engine, what is the likelihood that it will need more serous valve or ring work? And is it possible that the mating surfaces on the engine block will also be bad? What am I getting myself into?
     
  2. Jun 2, 2018 at 4:43 PM
    #2
    1997tacomav6

    1997tacomav6 V6 5sp,RegCab,TRD Supercharger,2"pulley,meth, 650k

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    V6 5sp,RegCab,TRD Supercharger, 2" pulley, methanol injected AC TRD supercharger,(MUST DO) TRD supercharger ported, rebuilt 3 times over 500,000 miles, every 125,000- 150,000 needs rebuild Projector headlights HID 5 speed manual Amsoil for all drive train Smaller 2” pulley,(300hp) (MUST DO) 2004 DESNO fuel injectors, zero ping ping, 2004 side door mirrors Dick Cepek Rims, Michelin tires LTX, ( that last 100,000 miles) Now running Dynopro ATM mud and snow tires KN cold air intake Cat back exhaust with ss exhaust tip, Raised exhaust tail pipe to 2" below body line Optima*dry cell battery,red top Alpine sirius radio, 200 watt amp, focal is165 split door pod speakers Focal door speakers Subwoffer behind seat Viper alarm, Electric Locks Dark tinted windows, 4runner bucket seats, Tacoma Rubber floor mats TRD fender extenders, Bilstien shocks chrome push bar, chrome nerf bars, add a leaf for rear springs trailer iv hitch, electric brake control, Drilled slotted brakes, High carbon steel (MUST DO) EBS green stuff 7000 series pads(MUST DO) TRD engine oil cap TRD stick shift, Rear sliding window 2002 4Runner functional hood scoop cut into Tacoma hood, 4Runner dual overhead map light Gentex Auto dim + Compass + Temp, garage,rearview mirror Corbeau bucket seats Snow Methonal kit stage 2 Champion 3 core aluminum radiator Linex bed liner
    It all depends on if it was over heated, if so
    you might have cracked heads , you will not know till you open it up, My head gasket went out at 489,000 miles
     
  3. Jun 2, 2018 at 5:45 PM
    #3
    5000fingers

    5000fingers [OP] Active Member

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    If the temperature gauge is any indication, it never overheated so hopefully I won't have to deal with that.

    What are the chances that the mating surfaces on the cylinder heads will be warped? Is that less common?
     
  4. Jun 2, 2018 at 5:51 PM
    #4
    Catcrazed

    Catcrazed Save a horse ride a Railroader

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    Have them pressure tested and surfaced.
    They can crack on #3 I believe. You'll wanna know.
     
    1997tacomav6 likes this.
  5. Jun 2, 2018 at 5:51 PM
    #5
    1997tacomav6

    1997tacomav6 V6 5sp,RegCab,TRD Supercharger,2"pulley,meth, 650k

    Joined:
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    Denver
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    97 reg cab, v6 5sp 300hp supercharged, Methonal Injection, 650,001 plus miles, Original Owner
    V6 5sp,RegCab,TRD Supercharger, 2" pulley, methanol injected AC TRD supercharger,(MUST DO) TRD supercharger ported, rebuilt 3 times over 500,000 miles, every 125,000- 150,000 needs rebuild Projector headlights HID 5 speed manual Amsoil for all drive train Smaller 2” pulley,(300hp) (MUST DO) 2004 DESNO fuel injectors, zero ping ping, 2004 side door mirrors Dick Cepek Rims, Michelin tires LTX, ( that last 100,000 miles) Now running Dynopro ATM mud and snow tires KN cold air intake Cat back exhaust with ss exhaust tip, Raised exhaust tail pipe to 2" below body line Optima*dry cell battery,red top Alpine sirius radio, 200 watt amp, focal is165 split door pod speakers Focal door speakers Subwoffer behind seat Viper alarm, Electric Locks Dark tinted windows, 4runner bucket seats, Tacoma Rubber floor mats TRD fender extenders, Bilstien shocks chrome push bar, chrome nerf bars, add a leaf for rear springs trailer iv hitch, electric brake control, Drilled slotted brakes, High carbon steel (MUST DO) EBS green stuff 7000 series pads(MUST DO) TRD engine oil cap TRD stick shift, Rear sliding window 2002 4Runner functional hood scoop cut into Tacoma hood, 4Runner dual overhead map light Gentex Auto dim + Compass + Temp, garage,rearview mirror Corbeau bucket seats Snow Methonal kit stage 2 Champion 3 core aluminum radiator Linex bed liner
    The heads are aluminum and the block is cast iron, so definitely have them checked To be safe,
    Typically blown head gaskets come from
    the engine getting over heated.
     
  6. Jun 3, 2018 at 11:56 AM
    #6
    villlein

    villlein Well-Known Member

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    SAS with dodge D60/D70, 36 iroks, 5.86's welded rear, Eaton lock, OBA, half back cage, rear mount radiator, etc...
    It's not always just overheating, but 90% of the time that's the case. I've seen pinhole leaks from a coolant tube to piston across the gasket, cracked heads, cracks in block, warped heads. You should be anal as hell about scraping and buffing the engine block head if you don't want to take it out for resurfacing. When I say anal, you want that portion of the work done well, and it's going to take some serious patience. Razor blades, angled die grinder, 3m pads, and a very consistent motion so you don't work a section lower than any other spot.

    You'll be knee deep in the motor so there's no shortage of items to replace if you have the budget while it's all open. Timing belt/Water pump, new seals for everything you open, injectors tested/cleaned or replaced, checking valves and seals, valve guide check, the list goes on and on.

    Depending on your miles, sometimes if you find a low mileage engine to swap, it's a winner. Just food for thought once you price out your time, tools, machine shop time and $. A lot of machine shops around here have a 2-3 week wait list- if not longer.
     

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