Reliability of 2.4L engine?

[etc]

How reliable is Gen 5 2.4L engine?

I hear some reports of head gasket failure if overheating occurs. Is this a more common problem than the old 2.2L?

I understand that 2.4L uses aluminum heads to decrease the weight but does it introduce realibility issues long-term?

How well does 2.4L work long term, has anyone put 100-200K miles on it without issues?

[white3ch0c0late]

I've got 86k with no issues. I know there are others with much more. The engine is reliable.

[TRD VVTi]

It's very reliable. That's why I purchased my Camry with the 2.4. Having an aluminum head on an aluminum block is actually better and more durable than having a cast iron head. The aluminum head doesn't create any problems at all.

Head gasket failure with overheating is common on nearly every engine. Overheating can ruin just about every part of the engine. Common sense usually will keep any damage from occuring.

[Mike Murrell]

TRD is correct - aluminum on iron is awful. Ask anyone with the old Datsun Z or older Mercedes cars with 4/6 cyl motors made in the 80s/early 90s.

Overheating will deep-6 any motor.

I have a 2.4 in an '04 Tacoma baseline. Good motor.

[gdanaher]

They do have steel sleeves though, right? Would hate to think of what might happen with hard anodize.

[CharmCityES]

very reliable....we had a trade in 02 camry LE 4cyl with 210k miles and it still ran as smoothly and quietly as my 03 SE 4cyl with just shy of 50K
you treat it well and it will treat you well.
the aluminum block/aluminum head 2az 2.4 is a tough engine

[71Corolla]

Originally Posted by Mike Murrell

TRD is correct - aluminum on iron is awful.

Maybe on some cars, but Toyota used the iron block/aluminum head configuration in 10s of millions of engines, going way back to the early 70's with bulletproof reliability.

You have to go back a long way and look fairly hard to find a series of engines from Toyota that were not reliable.

[EnderSavesTheDa]

2az ftw

[TRD VVTi]

Originally Posted by gdanaher

They do have steel sleeves though, right? Would hate to think of what might happen with hard anodize.

Yep.

[Mike Murrell]

Originally Posted by 71Corolla

You have to go back a long way and look fairly hard to find a series of engines from Toyota that were not reliable.

You don't have to go far at all. Mid-90s - V-6 motors blowing head gaskets right and left. In this same period there was also an engine oil-sludging problem. Millions of engines affected.

In the old days, Toyota was great.

Today there are 3 American cars that have a higher J. D. Powers rating than Toyota(#6) and Honda(#5).

Once known as the Rising Sun....getting to be the Sinking Sun.

[drunken_panda]

I have 150K miles on my 04 2.4 everything is still orginal. I need to do the spark plugs soon. The only time it has missed a beat is when the battery die and I needed a jump.

[etc]

Reason for my inquiry is scary threads like this. It appears there is mounting evidence 2.4L can develop head gasket problems. Not sure if overheating is involved or if it happens arbitrarily.

02 camry le 4cyl smoke at startup.

[TRD VVTi]

Originally Posted by etc

Reason for my inquiry is scary threads like this. It appears there is mounting evidence 2.4L can develop head gasket problems. Not sure if overheating is involved or if it happens arbitrarily.

02 camry le 4cyl smoke at startup.

Don't be scared. The majority of the time that an engine has problems like that prematurely are because it wasn't properly maintained.

If you take care of your car and do the proper maintenance at the proper intervals with the proper products, you should be just fine.

[carlo$]

2.4 is the best, descent power and good gas savings.

[etc]

I just got a 2002 2.4L 5 speed.
I am fairly paranoid about maintaince and use Mobil 1 every 3-4K miles, and watch my temp. gauge as well as flush the coolant often enough.

There is very little you can do to maintain the engine otherwise. Oil + coolant flush. Am I missing anything? I was under the impression they were experiencing issues even while doing these things.

One trick when buying a used car is hitting the gas while parked in neutral and having someone watch the exhaust... you shouldn't see any white smoke come out of it. If it does, it needs major engine work (like in cases above)