4.7 Toyota 4runner With Beefed Up Rods

aedavis

I noticed this post in the Toyota section of Pirate4x4 the other day. Pietro, I think, is a Toyota mechanic and he was very negative about the 4.7 engine and the 4speed transmission, like what is in my 2001 LC.

http://www.pirate4x4.com/forum/showthread.php?t=336619

Has anyone here experienced these kinds of problems that Pietro describes in post 2 of that thread? I know the exhaust manifold cracks aren't unheard of, but what about the cracked flexplates, smoked TCC lockup clutches, and blown overdrive planetaries?

If it matters, I bought my LC to tow my skiboat and maybe to haul my 85 4Runner rock truck around on a light flatbed. I have no intention of doing any major engine enhancements so I doubt I'd experience these problems, but . . .

Just wondering,

Allan

LandCruiserPhil

The guys a tard...
1st check his sig line - Support America. Trade your Mexican made Chevy for an American made Toyota
but he tells the guy to go with a 4.3 Chevy

2nd downs 22r - best motor Toyota has ever made IMO - check Toyota high mileage club you will find many 22r going forever

I think the 4.7 kicks ass I tow everything with it travel trailer, popup, and boat. Just changed the tranny fuild and when I drained I felt like putting it back in. It looked and smelt new. O my 100 has 120k on it. No worries towing with a 100 in my camp.

NMuzj100

cracked flexplates, smoked TCC lockup clutches, and blown overdrive planetaries?

I haven't heard of a single case of these problems on the board and I read way too much.

LEXUSBEN

Difference between the Tundra motor being built in the states and the L/C motor in Japan. I know they have more trouble with the Tundra powertrain than the japanese built stuff. Only thing I have seen ever fail is trans internals (thrust washers) and I've seen as many 5 spds and 4spds, both of which together maybe 6. I've got 170k on mine and have a few customers who have 250-270 and none of us have ever experienced these problems.

sleeoffroad

We have also seen two cases of the thrust washers fail on the transmissions. Hardly and epidemic. Also, what does that have to do with the motor?

maingear

He is making the mistake in assuming the Tundra/4runner tranny is the same as the landcruiser's. It is not the same part.

There are major issues with the 1st generation Tundra in towing applications. That's why there is an 8 speed tranny in the 2nd gen.

I am using a 1U for a 2002 Celica because the block is lighter and cheaper than the cast iron 4.7.

Lextreme is an excellent resource for engine build/turbo information.

Jim_Chow

He is making the mistake in assuming the Tundra/4runner tranny is the same as the landcruiser's. It is not the same part.
There are major issues with the 1st generation Tundra in towing applications. That's why there is an 8 speed tranny in the 2nd gen.

I am using a 1U for a 2002 Celica because the block is lighter and cheaper than the cast iron 4.7.

Lextreme is an excellent resource for engine build/turbo information.

5speed in the 4Runner (and Sequoia?) is different than the one in the 100, too. 4Runner planetary gears are aluminum to save 200 lbs. vs. steel in the 100.

Lextreme

The only problem with the 4.7L would the skinny rods. The 4.7 rods break all the time. However, you can get forged h beam rods for replacement.

SWUtah

The only problem with the 4.7L would the skinny rods. The 4.7 rods break all the time. However, you can get forged h beam rods for replacement.

Pass the pipe, I want what you've been smokin

1loudLX

they break if you boost it and go retarded with pressure.

e9999

The only problem with the 4.7L would the skinny rods. The 4.7 rods break all the time. However, you can get forged h beam rods for replacement.

mind quantifying how often is "all the time"?

SWUtah

Looking at that pirate thread is a good reminder why one should never take any serious (brand) advice off of a general off road forum. Too much bias involved which ends up as misleading and false information. Owner forums like Mud give you useful info that if someone gets on and tries to mislead because of ignorance are quickly corrected or questioned until the truth is clear.

Lextreme · Aug 22, 2007

If you go to your local engine core junk yard and you will see most of the 2uzfe blocks have broken rods. Here one example http://www.lextreme.com/tundra.html. Misleading? I deal with this everyday! For this very reason TRD stop making the M90 supercharger kit. If you want to know the truth, please go to a forum that mainly deals with Lexus and Toyota V8 engines. After you spend few days reading it, then u understand why....

e9999

interesting tech info, Lextreme, thanks, but yes let's try and keep the vendor aspects -if any- out of this thread, please.

Lextreme

Sorry guys I am not trying to create fear. I was refering to FI with rod breakage on the 2uzfe engine. N/A you are find. However, I still see alot in junk yard with broken rods. Most the junkyard blocks got hydrolock due to BHG.

e9999

well, unfortunately, we have plenty of 80s (1FZJs) with HG failure, unlike the 2U, but I don't remember any which got busted conrods because of hydrolocking.
then again, I would not be surprised if the 1FZJ has stronger rods.

jibby

The rods are weak and will fail first in the 2uz and 3uz motors when boosting as Lextreme has stated..I too have seen this happen first hand.....I concure with Lextreme %100... N/A you are good to go, no need to put the bicycle in the trunk for when rods break... THe stoutest of motors is the early model 1uz-fe, the 4.0 liter motor that can support 400whp at stock form... Rods are more stout.. Toyota designers started slacking on tensel rod strength in future comparible motor designs...

SWUtah

So my rods should be OK driving my LX to the mall. Tried to make it lighter by taking out the thrid row of seats and I don't tow

4.7 Toyota 4runner With Beefed Up Rods

Anyone experienced these problems with 4.7? (2 Viewers)

e9999

Gotta get outta here...

e9999

Gotta get outta here...

e9999

Gotta get outta here...

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