xJZ Swap FAQ

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  1. #1
    Registered User MWebber's Avatar
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    xJZ Swap FAQ

    With the ever increasing popularity of the JZ swap, I'm starting the FAQ to consolidate most of the info. If you have something to add feel free to post. Below are some of the categories to fill in to help potential swappers make a more informed decision of the correct motor for them.

    =====>The MKII needs a front oil sump<=====

    Chassis Codes:

    Chassis code key: chassis code / sump orientation(front or mid) / TT, T, NA / Fan type / stock rated horsepower if known / notes
    example: JZX90 / front / TT / hydro|mech / 300 / JDM|USDM|etc / Years (any relevant notes)


    1JZ:
    JZA70 / mid / TT / hydro / 280 /JDM MK3 / ?
    JZX81-B Chaser / front / TT / hydro / 280? / JDM / ?
    [Need chassis code] Soarer / mid / TT / hydro / --- / JDM / ?
    JZX81-A Mark II / front / TT? / hydro / --- / JDM / ?
    JZX81-C Cresta / front / TT? / hydro / --- / JDM / ?
    JZZ30 - Soarer / mid / TT / Mech / --- / JDM / 1991-1996
    JZZ30 - Soarer / mid / T / Mech / --- / JDM / Aug 1996 on


    2JZ:
    JZA80 / mid / TT / mech / 320 / USDM Mk4 / 1993-1998
    JZS1?? / front / TT / hydro? / 276 / JDM Aristo / 1991 - 1997 (R6 3 liter)
    JZS1?? / front / NA / hydro? / 226 / JDM Aristo / 1991 - 1997 (3.0Q)
    JZS147 / front / NA / mech? / --- / USDM Lexus GS300 / 1993+
    JZS160 / front / NA / hydro? / --- / JDM Aristo / 1995 - 2005 (vvt-i?)
    JZS161 / front / TT / hydro? / --- / JDM Aristo / 1995 - 2005 (+VVT-i
    JZA80 / mid / TT / mech / 280? / JDM / ~1986 - ~1993
    JZZ31 / mid / NA / hydro? / 225 / JDM / JDM Soarer / ?
    JZZ31 / mid / NA / Mech? / 225 / USDM Lexus SC300 / ?
    JZZ31 / mid/ NA / Mech? / 225 / USDM Lexus SC300 / 1998+ (+vvt-i)



    Wiring Diagrams:

    1JZ:
    JZZ30 ECU pinout


    2JZ:


    Transmission, 1j or 2j:

    1: Original W58: (not really recommended)
    NA USDM MK4 5 speed bellhousing
    2JZGE flywheel
    Stock or upgraded MKII clutch

    2: R154: 5 speed
    JZA70 bellhousing
    1JZGTE flywheel
    7M stock or upgraded MKIII clutch
    Automatic MKII trans mount


    3: Automatic:
    Torque converter for JZ block. (1JZ or 2JZ)
    JZ Bell housing (1JZ or 2JZ) See below
    USDM Vehicles:
    A340E
    1993-1995 Lexus GS300 3.0L I6
    1992-1998 Lexus SC300 3.0L I6
    1992-1998 MkIV NA Supra

    A341E:
    1993-1998 Toyota Supra turbo

    A350E (5 speed AUTO):
    1995+ GS300

    Radiator:

    1: Stock (possibly not sufficient)
    2: MK3 radiator, with jza70 radiator hoses, mechanical or E-fan
    3: JZA70 radiator, with jza70 radiator hoses, hydro fan

    Water pump (1j or 2j):

    To convert from hydro fan pump to standard pump:
    Supra MKIV TT water pump.
    Water pump housing (rear),
    Any 2JZ/1JZ water pump pulley from a manual pump
    AFAIK, All USDM 2JZ motors are NON-hydro

    Oil Pan:

    To convert mid sump to front sump. You need: (Stock Twins)
    *** IT is up to YOU to double check part numbers listed. Numbers listed are for 93-94 Lexus GS300
    Upper oil pan #12111-46102
    Lower oil pan #?????-?????
    Pickup # ?????-?????
    Gaskets #?????-?????
    Baffle plate #12121-46010
    Front sump dipstick #15301-46022
    Dipstick guide #11452-46010
    Bolts for lower pan, pickup, and baffel (all the same) 90119-06624
    Front sump oil drain fitting #?????-?????
    2 rubber drain lines from turbo #?????-????? and #?????-?????

    Modifying to big single (et al)
    Beyond the scope of this FAQ

    Fuel filter:

    JZA70 1JZ for example, does not have a fuel filter at the engine. You have to adapt the 5M style fuel filter setup to the JZA70 fuel line system. Not very difficult.

    Fuel pump:
    Supra TT or MK3t
    Walbro 255
    Bosch 044 ? external?


    note: Consider dual pumps if running much over stock boost on the JZ engine.

    Engine mounts:

    1: Custom brackets, use original mounts

    2: Custom crossmember, to use original JZ mounts (norbie style)

    Wiring/ECU:
    (automatic ecu/harness will work fine)

    1: Supra JZA70 harness (extend harness, and follow 7M style conversion diagrams)
    2: Soarer 1JZ harness (extend harness, use wire diagrams to find appropriate power sources)
    3: Aristo 2JZ harness (study US 2jz diagrams, good luck)

    Power Steering:
    1:RA65 Celica power steering lines (slight encouragement needed)
    2:Driftmotion power steering line kit for the mk3 to 1jz pump is a direct fit
    3:If having custom lines made, make sure to take the xJZ power steering pump end and your MKII Steering rack end.

    Power steering cooler lines are on the low pressure side. (rack -> cooler ->reservoir)
    A/C:

    Use JZ compressor, convert to MA70 A/C head unit ( the top piece ). This will allow you to use stock MK2 A/C Button. Custom lines, similar to 7M/MK2 swap after that.

    If deleting the AC:
    Use Dayco serpentine belt # 5060735

    Alternators (Generally 100 amp)
    Direct fit: (MKII Alt connector is on the body/fender harness not the engine harness)
    1992 SC300 5-speed alternators (Autozone - Duralast alt. P/N 14459)
    The JZS147 Aristo

    Note: Upgrade your Alt wires to 4 guage.

    TACH:

    Make your own
    Similar to 7MGTE Swap
    Use any 2JZGTE/1JZGTE Igniter (if not supplied with engine)

    OEM Gasket Sets
    1JZGTE full engine gasket kit - # 04111-46033

    Reference Websites:
    1JZ.com
    Arnout's 1JZ Swap Page (MKIII but good info for JZA70)
    Soarer Parts List
    Soarer Central
    Aristo Forums(JZS147)
    http://www.jzx81.net/models.html <--- Dead Link
    http://www.jzx81.net<--- Dead Link

    If you have other categories to add post them and I'll add to this post. Anything that has a "???" in it either needs confirmation or the information. If you have this info, please post.



    A big thanks to everyone who has posted. This 1st post is a condensed 'soup' version of the comments and knowledge posted by many of our great members, some subjects are explored in greater detail in pages to follow.

    Updated to page [12]
    Last edited by MWebber; 01-07-2010 at 01:45 PM.
    ...

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  3. #2
    Boosting Mod SilverMk2's Avatar
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    There's the obvious JZA80/mid/TT/320 option in US Mk4s and JZA70/mid/TT/280 JDM MK3 options
    1985 Super Silver Supra 2JZGTE
    2013 Satin White Pearl BRZ FA20
    2001 Black Sand Pearl Corolla 1ZZFE
    "You can never go fast enough....."

  4. #3
    Registered User MWebber's Avatar
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    thanks silver.

    also, I need folks to add if it's a 1J or 2J when they post. I know the two above, but others may be over my head.

    Mike
    ...

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  6. #4
    CelicaSupra.com Member
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    There is a ton of information to add. Do you want to just keep replying with bits and pieces?

    Also for this topic, it is important to note what type of fan the engine comes with. Example (all twin turbo):

    1JZ Supra, Mid Sump, Hydro Fan
    1JZ Chaser, Front Sump, Hydro Fan,
    2JZ Aristo, Front Sump, Hydro Fan,
    1JZ Soarer, Mid Sump, Mechanical Fan,
    2JZ Supra JDM, Mid Sump, Mech Fan,

    etc

    On the 1J, there are 2 types of harness/ECU combos, also on the 2J.

    Then 1J VVTi, the list goes on.

    Probably rather then try to cover every piece of JZ information. It would probably be best to stick to the information that is relevant to the swap into MA6x.

    Transmission, 1j or 2j:

    Original W58, using NA MK4 5 speed bellhousing, 2JZGE flywheel, 7M type clutch

    R154, using JZA70 bellhousing, 1JZGTE flywheel, 7M type clutch

    Radiator:

    Stock (possible not sufficient)
    MK3 radiator, with jza70 radiator hoses, mechanical or E-fan
    JZA70 radiator, with jza70 radiator hoses, hydro fan

    Water pump (1j or 2j):

    To convert from hydro fan pump, to standard, use supra TT water pump. Water pump housing (rear), and supra TT or any 2JZ/1JZ water pump pulley (it's different).

    Pan:

    To convert mid sump to front sump. You need the upper and lower oil pan. The pickup, gaskets and baffle plate associated. You need the front sump dipstick and front sump oil drain fitting if using the stock twin turbos.

    Fuel filter:

    JZA70 1JZ for example, does not have a fuel filter at the engine. You have to adapt the 5M style fuel filter setup to the JZA70 fuel line system. Not very difficult

    Fuel pump:

    Supra TT or MK3t (at worst)
    walbro 255 (bang for the buck)

    Engine mounts:

    Custom brackets, use original mounts
    or custom crossmember, to use original JZ mounts (norbie style)

    Wiring/ECU:
    (automatic ecu/harness will work fine)

    Supra JZA70 harness (extend harness, and follow 7M style conversion diagrams)
    Soarer 1JZ harness (extend harness, use wire diagrams to find appropriate power sources)
    Aristo 2JZ harness (study US 2jz diagrams, good luck)

    A/C:

    Use JZ compressor, convert to MA70 A/C head unit ( the top piece ). This will allow you to use stock MK2 A/C Button. Custom lines, similar to 7M/MK2 swap after that.

    TACH:

    Similar to 7MGTE Swap
    Use any 2JZGTE/1JZGTE Igniter (if not supplied with engine)

    That was a little "quickfire" but there is much more.

  7. #5
    CelicaSupra.com Member repinS's Avatar
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    Quote Originally Posted by 935motorsports
    1JZ (JZX81)Chaser, Front Sump, Hydro Fan,
    As well,

    1JZ JZX81 Mark II, Front Sump, Hydro Fan,
    1JZ JZX81 Cresta, Front Sump, Hydro Fan
    - repinS
    Administrator, Hidden Content
    Hidden Content
    1985 Cressida Executive Sedan (RIP 11/2003)

    Hidden Content

  8. #6
    Registered User MWebber's Avatar
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    great googaly moogaly....

    keep it all coming, I'll put it in format as needed. Thanks for the heads up on the fan 935.

    Mike
    ...

  9. #7
    Registered User MWebber's Avatar
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    Robert,

    Feel free to add all the info you have. I'll keep adding as I have above, I think the categories are working well so far.

    Mike
    ...

  10. #8
    CelicaSupra.com Member BuddyJ's Avatar
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    http://www.jzx81.net/models.html

    Looks like all three are "JZX81"
    --Peter--
    85 Supra P 6M-GE

  11. #9
    CelicaSupra.com Member ZZT231's Avatar
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    When you get a mid sump or rear sump engine and you swap for the front sump. Buy a front sump oil level dip stick, as the rear and mid sump are different lengths... ECUs between the JZA70 and JZX90 I know for a fact are different as the JZX90 has the auto loom attached to it. The JZX90 is a front sump vehicle (as that's my donor car).

    1JZ Hydro fan pump is fine to use if you loop back the hoses but the price of the 2JZGE water pump pully is more expensive then the 2JZGE water pump unit which stopped me deciding of the conversion (which now I regret).

    A engineering firm in Australia makes "off the shelf" JZ mounts that uses the M style rubber mounts so you can use the M series cross member (which I am using).

    If you have the money, replace all the rear main, front main seals and change the water pump and timing belt as there isn't much room in the front of the car between the radiator and the harmonic balancer...

    I'm keeping an auto (A341E) and done minor modifications in theory to make the auto shift but it's not doing so, so we will investigate and post a finding.

    For those that are good with electronics you can try...
    *I've got one made but not using this but it's not hooked up yet*

  12. #10
    CelicaSupra.com Member BuddyJ's Avatar
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    Soarers:
    # JZZ30 - 2.5L 6 cyl twin turbo ('91-'96) [JDM]
    # JZZ30 - 2.5L 6 cyl single turbo VVTi (Aug '96 on) [JDM]

    # JZZ31 - 3.0L 6 cyl (JDM Soarer/ USDM Lexus SC300) 2JZ-GE (225hp and 210ft/lbs, SC300) in '98, the SC300 got vvt-i (225hp/220ft/lbs)

    Aristo, 1991-1997:
    Aristo was launched in 1991, offering two versions:
    -R6 3.0 with a 276 hp twin-turbo 2JZ-GTE engine,
    -3.0Q with a 226 hp 2JZ-GE engine.
    -Lexus GS 300 (JZS147) began in 1993 with 2JZ-GE.

    Aristo, 1998-2005:
    -JZS160 for cars with the 2JZ-GE engines (vvt-i?)
    -JZS161 for those with the 2JZ-GTE twin-turbo engines VVT-i
    --Peter--
    85 Supra P 6M-GE

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