Readonee35L:
The newer the better.
The 2GR is more advanced, slightly better mpg, more rugged .
Basically i don't see any disadvantage because the 2gr is almost indestructible despite the little errors they have they can stand the test of time.

The only disadvantage would be the cost of an engine replacement. But with proper maintenance the Engine will last the entire lifetime of that car.

an0daGuy:
Hehehe this bang guy. You too like quarrel pass fight. You don’t disappoint at all. Your ‘I too know’ level is alarming and worst is you’re ignorant on this particular case in question.

So you’re saying my personal experience isn’t admissible here? So what is your own fact and how did you arrive at it? See how quickly you ran to same google to try and bring up a flimsy counter to my narrative. At your age

On your head I rest my case jare

Op for what it’s worth, based on the experience I’ve had for 2 years with these engines in the exact vehicle you wish to purchase.

1. The 3mz is more fuel economical than the 2gr

2. After any unfortunate case of overheating the 2gr is more susceptible to extensive damage than the 3mz.

Choose your poison wisely and leave that guy above to go to heaven and look for who to bang.

Psoul:


You are very correct.
I drives Sienna with 3MV engine.
I was traveling one morning and my sienna had transmission issue. I topped the oil. Before I could drive for 5 mins, I noticed that the engine has started over heating.
When I stopped, I noticed that the transmission oil was just freely pouring on the road. I mean pouring as if my gearbox casing was broken.
The road, was very dangerous. I was traveling alone. My destination was still about 1hr 30mins drive going at the speed of btw 100 and 120KMPH. And I can't go back to the place I took off from cos it is almost the same distance to my destination. You can't even get roadside mechanics till I get like 10mins drive to my destination.

I waited for the engine to cool down a bit. I topped water to the radiator. I took off again. The worst was the gear can't go beyond gear one and two.
I kept driving this car that way which put lot of pressure on the engine which resulted to serious over heating. I will drive and top water. A journey of about 2hrs 30mins took me more than 5hrs to arrive. The highest speed I could attain was 40kmph. Sometimes, I could not even go beyond 20kmph.

What am I trying to say. I was surprised that when the mechanic finished bleeding the radiator, no damage on the engine.
I repaired the gearbox with N150,000. It about 1yr now and the engine and the gearbox are still running efficiently and no issue.

My friend drives Sienna 2008 with 2GR engine. Small overheat caused serious damage to the engine.

GAZZUZZ:


Heavenlybang for some strange reason he is right about the fuel economy thing.

I own both, and at some time i had a contract to supply 30 units to the south east for elections. The 3mzs where champs when it came to fuel economy while the 2gr were all guzzlers.


I think it's a sienna thing

Idaytesj29:


The 3mzs engines, I understand that they come with timing belts. Please, when those belts cut, do they bend valves and damage engine?

I will appreciate your response. Thanks

GAZZUZZ:


They do

Idaytesj29:


Thanks. Bless you. For someone in transport business, is every 6 months okay for routine change of the belt?

Hell no

Original belts brand new will last over 100,000miles, that should take you about 5 years if you are that busy

GAZZUZZ:


Hell no

Original belts brand new will last over 100,000miles, that should take you about 5 years if you are that busy

Soulsymbol99:
I don't think I have heard of anyone driving Toyota Venza, 2012 highlander etc complain of overheating. This is cause they both use same 2gr engines with sienna. So my question is, are we sure the overheating is not a sienna thing? Cause overheating is always the issue wit sienna wit 2gr engine

RoadMozart:

I also drive a highlander with 2gr engine. Haven't witnessed overheating since

Ceceking:
Talking from experience, I drive a sienna with a 2gr engine,
Yes talking about speed and stability, the 2gr has it over the 3mz but as per maintenance...no no no, it's not cheap to maintain,
Fuel consumption is high, it takes me 15 litres of fuel to go on a 60klm journey while a normal 3mz would consume less than 10 litres,
any slight thing to fix in the engine will require it being brought down completely as it has a timing chain other than a belt,
The 2gr is prone to overheating once it overheats , definitely your top gasket is gone and engine needs to be brought down to change just top gasket ...


I had my own fair share of the troubles of a 2gr but no doubt it's a nice engine only if you don't put the car to stress everyday, just good for personal use ...


It has speed and is rugged

franklin93:
Actually, I don't know much about the fuel economy of the 3MZ and 2GR on a sienna.

A lot of factors come into play here. If the sienna is powered by a 2GR on AWD system, it will likely take more fuel. Note that the fuel economy of these engines is dependent on the cars the engines are used in.

I have a 2004 Lexus ES330 with the 3MZ engine and I can confidently tell you it is more fuel efficient than a Toyota camry big daddy (04) with a 2AZ 4 cylinder engine and a Honda EOD 4 cylinder I once owned. I cannot complain when it comes to the fuel efficiency of the 3MZ.

franklin93:
Actually, I don't know much about the fuel economy of the 3MZ and 2GR on a sienna.

A lot of factors come into play here. If the sienna is powered by a 2GR on AWD system, it will likely take more fuel. Note that the fuel economy of these engines is dependent on the cars the engines are used in.

I have a 2004 Lexus ES330 with the 3MZ engine and I can confidently tell you it is more fuel efficient than a Toyota camry big daddy (04) with a 2AZ 4 cylinder engine and a Honda EOD 4 cylinder I once owned. I cannot complain when it comes to the fuel efficiency of the 3MZ.

ugreat:
Hello Sirs,
I want to ask which of the Sienna model between 2004-2007 has 3MZ engine?

Also is there a way to physically identify 3mz Vs 2gr engine? Thanks in anticipation.

Ps: asking cos I want to buy these model of Sienna with 3MZ engine. Thanks

ukandi1:


3mz has the engine top cover with red inscription on it boldly written VVT-I , 3.3.
The 2gr is plane with Toyota logo and V6 so boldly crested. The 2gr is crested there too but faintly on the cover.