Used Supra engines from Japan. Are they OK?

supradaddy0803 · 09-01-2007, 01:46 PM

When you look at a 1JZ next to the 2JZ in the mark 4 supra they look almost the same. This is because they are from the same family the 1JZ was the start of the 2JZ. Most of the parts for the 2JZ here in the states will fit the 1JZ and they have a metal head gasket from the factory. Pretty much from what I have seen most of the turbo kits for the 2JZ also say they are for the 1JZ as well and I have pulled the manifolds and the bolt hole match up. But there is actually a lot of stuff out there for that motor just have to go to the right place like here www.RHDjapan.com .

supramacist · 09-01-2007, 02:11 PM

I mean that's what I'd do.
I would listen to someone that has around 100 posts or less.
They aren't going to be there to help you rebuild the JDM.

You can't run jdm engines without a complete rebuild before installation.
If you do it's a crap shoot.

Inevitabley you will be sorry for not going USDM.

supraman121 · 09-01-2007, 09:14 PM

Quote:

Originally Posted by supramacist

I mean that's what I'd do.
I would listen to someone that has around 100 posts or less.
They aren't going to be there to help you rebuild the JDM.

You can't run jdm engines without a complete rebuild before installation.
If you do it's a crap shoot.

Inevitabley you will be sorry for not going USDM.

Hmm, who told you that? Unless you know from it personialy happening to you, They have low milage i have never heard of anyone having to rebuild a jdm motor, my manager fixes imports and he replaces the engines with jdm and has never had to rebuild one, you better do some research before knocking jdms... im sry if you got ripped off on your jdm motor.

oowee623 · 09-01-2007, 09:58 PM

not necessarily a rebuild is needed but more like maintainence like replacing gaskets and seals here and there making sure theres no leaks, they do sit for a long time, and new fluids. it would be easier to rebuild a 7m with new headgaskets while its out of the car whether it jdm or usdm right?

Supra2NR · 09-02-2007, 04:41 AM

Quote:

Originally Posted by supramacist

You can't run jdm engines without a complete rebuild before installation.
If you do it's a crap shoot.

Inevitabley you will be sorry for not going USDM.

i got a jdm engine, i bought it with the big turbo on it and the forged pistons
new rods, all arp studs, hks metal headgasket, hks cast iron exhaust manifold
it was ported already, the intake manifold wasnt sold to me cuz it was a jdm FFIM, plus more to list all this was with the jdm motor that i bought
somebody was playing with the motor i got at japan b4 they junked the car

and guess what, i ddnt rebuild the motor, and its running fine

dcrusupra · 09-02-2007, 05:24 AM

All these JDM motors are ran hard as hell. It really is a crapshoot like 2nr said. I've seen so many people install a JDM motor with a blown head gasket or rod knock already.

supradaddy0803 · 09-02-2007, 03:03 PM

I havent seen anyone yet that has bought a 1JZ or 2JZ from JDM that has had a problem. 7M's are a older motor and yes the head gasket thing is a known problem. With somthing like a 7M yes I would do the top end before I dropped it in because you never know. Plus with a 7MGTE you can find one of those for like 800 bucks so with how little you paid why not do the top end.

Supra2NR · 09-02-2007, 03:22 PM

Quote:

Originally Posted by dcrusupra

All these JDM motors are ran hard as hell. It really is a crapshoot like 2nr said. I've seen so many people install a JDM motor with a blown head gasket or rod knock already.

mine ran fine, no rebuild needed, thats why i got so far ahead with my project
so easy, now its jus a matter of getting the proper electronics so i can get as much hp as i want

justin1642 · 09-02-2007, 08:27 PM

i bought a jdm 7mgte motors and didn't do the top end before i installed it and absolutely no problems yet and i have ran it for at least 50k to 60k miles. the only thing i had to do was put another knock sensor on it cuz it was missing and some routine maintenance along the way. but i'm very happy with mine but i've heard of some not being so lucky so you really never know honestly.

supramacist · 09-02-2007, 10:22 PM

And if you never really know......, why take the chance.

I sure wouldn't buy one and drop it in straight from the box. The people doing this and not having problems are just getting lucky.

You guys thinking that the mileage is low. That's flucking hysterical.
Because they off load all of these engines. Then they proceed to tear them apart and get rid of what is visually no good.

So maybe your block has 40k something on it. But you have no idea what you are getting.

It's just not smart to put one in without going through it first.
It's not the right way to do things at all. You are just creating the probability for failure.

When you already have the engine out. Why not take a week and rebuild it.
It's just not good sense.

It's like finding a dildo and telling your wife to go ahead and use it.
Only for her to find out that it needs new batteries.

09-01-2007, 01:46 PM	#1
supradaddy0803 12psi boost Join Date: May 2006 Location: Athens, TX Posts: 308	When you look at a 1JZ next to the 2JZ in the mark 4 supra they look almost the same. This is because they are from the same family the 1JZ was the start of the 2JZ. Most of the parts for the 2JZ here in the states will fit the 1JZ and they have a metal head gasket from the factory. Pretty much from what I have seen most of the turbo kits for the 2JZ also say they are for the 1JZ as well and I have pulled the manifolds and the bolt hole match up. But there is actually a lot of stuff out there for that motor just have to go to the right place like here www.RHDjapan.com . __________________ 1987 supra NA 5 speed 1JZGTE swap Tokico Illumina 2 and Eibach springs Tokico pillow blocks Suspension Techniques front and rear sway bar HKS super dragger cat-back exhaust plus test pipe Greddy Profec B spec 2 boost controller HKS type 1 turbo timer Supra sport solid steel drive shaft Walboro 255 fuel pump JZA70 Front end mod 18" Volk Racing AV3 18x8.5 front 18x9.5 rear

09-02-2007, 05:24 AM	#6
dcrusupra 500whp yet? Join Date: Aug 2005 Location: Plantation, Fl. Posts: 1,052	All these JDM motors are ran hard as hell. It really is a crapshoot like 2nr said. I've seen so many people install a JDM motor with a blown head gasket or rod knock already. __________________ New Rebuild My CarDomain

09-02-2007, 03:03 PM	#7
supradaddy0803 12psi boost Join Date: May 2006 Location: Athens, TX Posts: 308	I havent seen anyone yet that has bought a 1JZ or 2JZ from JDM that has had a problem. 7M's are a older motor and yes the head gasket thing is a known problem. With somthing like a 7M yes I would do the top end before I dropped it in because you never know. Plus with a 7MGTE you can find one of those for like 800 bucks so with how little you paid why not do the top end. __________________ 1987 supra NA 5 speed 1JZGTE swap Tokico Illumina 2 and Eibach springs Tokico pillow blocks Suspension Techniques front and rear sway bar HKS super dragger cat-back exhaust plus test pipe Greddy Profec B spec 2 boost controller HKS type 1 turbo timer Supra sport solid steel drive shaft Walboro 255 fuel pump JZA70 Front end mod 18" Volk Racing AV3 18x8.5 front 18x9.5 rear

09-02-2007, 08:27 PM	#9
justin1642 3" Exhaust Join Date: Mar 2006 Location: Michigan Posts: 213	i bought a jdm 7mgte motors and didn't do the top end before i installed it and absolutely no problems yet and i have ran it for at least 50k to 60k miles. the only thing i had to do was put another knock sensor on it cuz it was missing and some routine maintenance along the way. but i'm very happy with mine but i've heard of some not being so lucky so you really never know honestly. __________________

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09-01-2007, 02:11 PM	#2
supramacist 1000whp postwhore Join Date: Apr 2007 Location: Escape from the Prison Planet Posts: 1,356	I mean that's what I'd do. I would listen to someone that has around 100 posts or less. They aren't going to be there to help you rebuild the JDM. You can't run jdm engines without a complete rebuild before installation. If you do it's a crap shoot. Inevitabley you will be sorry for not going USDM.

09-02-2007, 10:22 PM	#10
supramacist 1000whp postwhore Join Date: Apr 2007 Location: Escape from the Prison Planet Posts: 1,356	And if you never really know......, why take the chance. I sure wouldn't buy one and drop it in straight from the box. The people doing this and not having problems are just getting lucky. You guys thinking that the mileage is low. That's flucking hysterical. Because they off load all of these engines. Then they proceed to tear them apart and get rid of what is visually no good. So maybe your block has 40k something on it. But you have no idea what you are getting. It's just not smart to put one in without going through it first. It's not the right way to do things at all. You are just creating the probability for failure. When you already have the engine out. Why not take a week and rebuild it. It's just not good sense. It's like finding a dildo and telling your wife to go ahead and use it. Only for her to find out that it needs new batteries.