98 engine in a 94

[94turbo]

Hey guys my name is Jessie and Im thinking about getting a 94 TT supra but the engine is blown do you think i should get it and be able to put a 1998 tt engine in it?

[pwpanas]

Originally Posted by 94turbo

Hey guys my name is Jessie and Im thinking about getting a 94 TT supra but the engine is blown do you think i should get it and be able to put a 1998 tt engine in it?

Yes, that's an acceptable solution. In fact, if the 'blown' '94 engine only has piston/ring/cylinder damage, you don't need a whole '98 longblock with turbos...just get a 'shortblock' from Toyota ($2500 or less) and bolt your '94 head onto it.

You can find out exactly what's wrong with the blown engine by doing a leakdown test on it.

If you ask a shop experienced with the Mkiv Supra Turbo to do this swap for you, they'll probably charge you somewhere between 30 and 40 hours of labor. (Probably about $3K in labor) ...and yes, it really does take that many hours of hard work to do this swap properly.

The only difference between the two shortblocks is very minor: the size & thread pattern of the hole in the block for the oil pressure sensor (i.e. the '98 oil pressure sensor is different), and Toyota sells an adapter to address this problem.

Post back if/when you need some advice

[94turbo]

Hey thanx for the info but apparently they have seized the engine so what do I do now just buy a new engine?

Jessie

[pwpanas]

Originally Posted by 94turbo

Hey thanx for the info but apparently they have seized the engine so what do I do now just buy a new engine?

Jessie

No, a new shorblock will probably still work ... although now you don't know if you'll also have to buy a 2jz-gte head too.

You could also go with a used jap-spec 2jz-gte longblock (usually available from an Aristo, not a Supra) and swap all of the necessary parts.

Honestly it sounds very suspicious. I've never heard of a 2jz-gte 'sieze' - you'd have to (for example) run it without any oil for a long time for something like that to happen. It's difficult to envision any normal operating condition that would cause it to completely sieze except maybe a broken connecting rod? FYI: For a connecting rod to break, they'd have had to be running a huge shot of nos, and about 1000hp. Given how unusual all of this is, do you think they're telling you it's siezed so you can't do a leakdown? Oh, and note you can still do a leakdown on a siezed engine by removing the cams.

[94turbo]

Yea thats what happen Im buying this car from readytofix.com if you want to take a look at it? Its the 94 turbo with blown engine

[94turbo]

So what do you think?

[pwpanas]

Originally Posted by 94turbo

So what do you think?

I think anything from readytofix is a big gamble. Worst case, absolutely everything in the car is wrecked, and it all has to be replaced...it might even have frame damage. Don't forget you're talking about a $50,000 GT Sportscar here...none of the parts for the Mkiv Supra Turbo are cheap, and here are a few examples: The 6spd tranny lists for $5,5500.00 from Toyota. The oem twin turbos list for $2,200.00 each. A new wiring harness is about $900. Even 'minor' engine parts are expensive: the ignitor box is over $400, and coils are $60 each (there are six of them). A decent set of tires runs you $1000. Add onto all of that the complexity of assembling a driveline capable of 1000hp. If you're not an expert mechanic, with experience working on the Mkiv Supra Turbo, you'll probably want to take the car to a shop to have the work done. This ain't no tree-pipty chebbie...for a shop experienced in working on the Mkiv Supra Turbo you'll probably be paying somewhere between $50/hr and $100/hr in labor rate. Please be sure to consider a total worst-case cost before you make your final decision to take on this project.

[94turbo]

Do you know where I can get a cheap supra that needs minor repairs or any supras at all 93-98?

[pwpanas]

Originally Posted by 94turbo

Do you know where I can get a cheap supra that needs minor repairs or any supras at all 93-98?

Unfortunately, any Mkiv Supra Turbo that only needs minor repairs won't come cheap.

I'd suggest you start your search here:
http://www.mkiv.com/buy_a_supra/index.html

Also, there are several sites that specialize in selling Supras, such as this one:
http://www.speed4sale.com

[94turbo]

Well I think im going to consider the 94 Supra Lets just pray its not really bad.