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xJZ Swap FAQ

112K views 144 replies 47 participants last post by  Gross_beef 
#1 · (Edited)
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]
 
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#27 ·
I believe we have about 5 front sump swap sets in stock, complete with ALL componenets, both pans, etc. They will bolt on to the 1JZ, 2JZ from any platform. If it 's a JZ series block, it fits. - email for details.
 
#28 ·
I have a question regarding the powersteering lines, are you guys using powersteering with a 1JZ into say an 83 chassis?

Anything come close to bolting up?
 
#31 ·
It is 100amps and I just jumped on autozone's website and pulled up their partnumber for a Duralast alt. P/N 14459

Otherwise jump on supraforums and got to the Elmhurst toyota section, or PM Curt Aigner and ask for a part number and price quote, I am fairly certain that the OBD1 supra's and lexi used this alt. I am also willing to bet that it is the same unit in the MKIII's.
 
#33 ·
Ok so i have been reading this and I still have no clue what i need and dont need to do a 1jz or a 2jz into my 84 celisupra.

Whats all this talk of sump converion...why do it?

What is everything you are saying. Why cant I just buy an engine and put it in. Where is a step by step guide that explains what to do?

Also, what are the specific differences in a 1jz and 2jz....What is it that justifies the double/triple price tag on the 2jz
 
#35 · (Edited)
drumminforev said:
Ok so i have been reading this and I still have no clue what i need and dont need to do a 1jz or a 2jz into my 84 celisupra.

Whats all this talk of sump converion...why do it?

What is everything you are saying. Why cant I just buy an engine and put it in. Where is a step by step guide that explains what to do?
Read the posts thoroughly - the answers are all here.
 
#37 ·
There is no instalation manual - just information from those that have done or are doing it. The sump fits in front of the crossmember, some motors have a rear sump depending on the application
 
#39 ·
They're not exactly new (I started my 2JZ swap about 4 years ago), and in certain parts of the world it seems like every second MkII Supra has a 1JZ or 2JZ conversion. Apparently it's nowhere near as common in the US though, maybe because nearly everyone seems to prefer Hondas? Don't ask me why.
 
#40 ·
Norbie said:
They're not exactly new (I started my 2JZ swap about 4 years ago), and in certain parts of the world it seems like every second MkII Supra has a 1JZ or 2JZ conversion. Apparently it's nowhere near as common in the US though, maybe because nearly everyone seems to prefer Hondas? Don't ask me why.
Also to add to Norbie's comments, the 1JZGTE is not Californian Emissions Complied from the factory unlike US produced 2JZGTE which is fitted in the JZA80 (To my knowledge).

So 1JZGTEs are rare to come by and if avaliable in the wrecking yards as most of them are ex-Japanese cars.

Cheers.
 
#41 ·
Hi all,dose ..anyone have the part number for the oil pick up and the lower oil pan?
Lacrssgus14 post some of the p/n on page 2(thanks) but i still need these two to complete my front end sump...i have serch SF and here(SM is down)with no luck.thanks in advance.
 
#45 · (Edited)
I'm looking for sites to back this up, but as far as I can remember:
  • VVTI added
  • Compression raised
  • Switch to single turbo
  • Due to head being changed, old style intake and exhaust manifolds don't match
  • Switch from MAP to MAF

Probably more I forget.


Edit: Thought this was talking about 1jz's oops...

Links I've found to back up what I think I remember:
http://autospeed.drive.com.au/cms/A_2750/printArticle.html
 
#49 ·
I just thought I would add to the pile of info . With so many 1j's on the go we gotta be able make this swap as painless as possible and thanks to our experianced members for your patiance with us your our best source for infomation.

JDM to U.S. part numbers

http://www.1jzgte.com/tech/JZA70 Parts Reference.html

wiring diagrams and much more


http://www.1jz-gte.us/92Supra6.html


ecu pinout

http://img322.imageshack.us/img322/3503/jzz309gp.jpg


JZA70 specs


http://www.turbosupras.com/pages/en/pages/specifications/JZA70/jza70.htm


Pulling codes


http://www.trackdaymedia.com/~manny...stic panel layout (Altavista Translation).pdf


Hope it's a helps and theres much more so please add if you can make a contribution. :D

Bruce
 
#50 ·
ill be acquiring a 1jz long block for VERY cheap soon. and just thought i should pop my head in and say hello! lol. i wont be doing the swap for a while but it will happen someday. yay! i need to finish my 6m setup first. lol. but it will be nice to have that block sitting on the stand all purty and everything. i will be needing all the accessories and bracketry for it. and when she does go in it'll be with a single and some goodie parts.

if anyone wants to help me linking me areas to look for parts i will be very appreciative.

edit: its a mid sump so i will be doing the front sump conversion...
 
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