Toyota 4.0 V8 1UZ Engine Overview, Common Problems, Pros and Cons

The Toyota 4.0 1UZ is a superb, slick, and dependable V8 engine that is incredibly difficult to match.
In this short video, we will give you a short but useful info about this engine.

Timecode:
Engive overview - 00:00:00
Common problems - 00:01:19
Pros and Cons - 00:02:46

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[robertthornton]

Im stuffing one in a Scion TC Premium here we come baby

[barbarycoast]

I have a 92 SC400 hardtop, have had it for 20yrs. The engine has 303, 000 miles, has never been opened, totally stock, as is the whole drivetrain. Drive the hell out of it, no oil consumption to speak of. On my 3rd timing belt as well as windshield. May be the best production car ever, is the most fun to drive___"Long distances at Hi-Speeds"

[BasketballAve]

1989-94 non VVTI 1UZFE were all non interference.

[Mike_Barker]

They are only interference engines from 1995 and up. Great video! I am swapping one into my AE86.

[texan]

Only thing to dislike is how on VVTi models, to change the cam seal is a cam removal required job. It is a lot more complicated, more labor, and more opportunity to make an error going back together. The 2JZ engine with VVTi does not require intake cam removal for the seal replacement. They did the design better on it for service.

[marcdargitz]

There were 3 generations of the 1UZ, this video places all generations in the same category, which is incorrect. Example, the first Generation (89-94) are non interference, timing belt maintenance is 120 k and the compression being 10:1, therefore safely operating on standard 87 octane. In addition, in 1995-97(2nd generation) Toyota/Lexus went to the OBD2 system..lighter pistons and rods, compression increased to 10.4:1( close interference and required premium octane.
Gen 3 lighter pistons, rods and crank and upped compression ratio to 10.5:1 w/VVTI.
High performance enthusiast recommend Gen 1 for forced induction. Fact: Gen 1 engine can handle 800 HP unopened/rotating assembly/ short block with standalone ECU (proper tune)...not so with Gen 2 &3!
Simply put, you can't broad brush the 1 UZFE into one category, such as we see in this video. Overall, good video.
Note: VVTI engine is better if only adding headers, cam, etc.., they simply don't hold up to forced induction due to the lighter pistons and rods. My.02👍

[Miller]

Owned 2 LS400's. The 1UZ engines are bulletproof. Both of them made it past 250k with no problems with just basic maintenance. Only problems I've encountered was the power steering unit always failed due to the air valve that was connected to the intake manifold. I was always low in power steering fluid because the valve would suck fluid into the manifold burning it off making it look like it was burning engine oil. Other problem if it starts leaking too, the alternator would crap out since it is directly below the power steering fluid reservoir.

Another issue was the ECU. Both ECU's had capacitors blow out resulting in problems with the throttle position sensor and camshaft sensor codes.

[willyhwang]

the 1UZ in my 1998 GS spun rod bearings upon starting.
leading to rod knock.
at 330, 000 kms.

[zenki_ls]

forgot about the ECU issues which are somewhat common

[Vivianauxito]

Great video buddy, Are you open to any LED lighting review? We just emailed you about that.hopefully hear back from you soon

[brendanmouat]

Why would a vvti all of a sudden be high in oil pressure, have done oil sample allgood, have replaced oil pump with 3uz oil pump. Still high.

[diyman]

Timing belt on drive camshaft
Not thing else

[elodvezer]

Lexus LS, Four and Half...." if you know, you know and now you know *#!$%!!"