?????

 

Whoa!! Sorry to hear about this. I have never heard of this happening to a 3.4l. I know plenty of them with 200,000 + miles and never had an issue like this.

 

Yea I'm super bummed. The truck was really babied. Garaged its whole life. Now I'm looking for a JDM import motor with around 50K miles. It's cheaper than getting a remanned long block or a short block for that matter and most of them come with all the accessories and manifolds attached.

 

You will need to swap intake and injectors. Due to the variance in emissions some of the stuff will need to be swapped. The injectors may also be stuck if the motor has been sitting for a while on a shelf.

 

Rods just don`t fail like this .

fess up and tell what really happened.

I have heard of things like this happening just from the change in driving style.

In almost any engine

from being driven in the normal type of driving .

To some one with the right foot always on the floor.

just how many rpm where you pulling when this let go??

What else broke when the engine locked up??

 

Yep, various reports like this over the years.
All of them seem to be flukes.

 

No really. I was cruising down the road. Went to catch up to someone and got on the throttle. Started to chatter then BANG, she blew. Even if I would of been hard on this motor all the time, it only has 88K on it and shouldn't of failed. I had a 1997 4runner that I beat the living hell out of. 140K on the clock with no issues.

 

Why does the intake need to be swapped? All in all the long block should be the exact same as mine correct?

 

Sorry to hear. Hopefully you find a good import engine soon.



Andreas

 

I've personally heard of one or two other low mileage (>90k) that have thrown rods. It's kind of a fluke, but does happen. A friend of mine had one with 60k he just did a short block on 6 months ago. Same situation. Always dealer serviced, babied, yata yata yata. Guy said he left a stop light, hit second gear, and bang, rod off #2 said bye-bye to the crank by making its own side exit through the block. Nothing else was amiss internally. Just one rod missing. Scan tool showed in the freeze frame data that it popped at about 3000 rpm, with mid throttle, so it supported the guy sayin he wasn't bangin on it. Every engine design is gonna have a few bad apples. They're all gonna have a few that seem to fail for no reason at all. A lot of times, it could just be a machining defect from the factory, or a weak spot in the casting.

Edit-any pictures of the failure?

 

The manifolds are slightly different. And I think the exhaust manifolds are different as well. So be ready for new gaskets there.

 

No pics yet. I haven't touched it

 

Someone over revved it or ran it in the rpms alot. These motors never do this unless someone runs em in the red.

May have been him, may have been you. 3.4's are not a motor to hammer on all the time.

 

Did the PO have a teenage son?

 

Nope.

 

When was the oil last checked? Changed?

Unless it was somewhat brutally overrevved, it probably is due to oil starvation.

A quick teardown would be revealing, before you take the engine off for scrap.

You'll likely see a damaged bearing on the thrown rod.

If not, it was probably over stressed at some point in the past - either over revved or perhaps lightly hydrolocked. Damage to a rod can sometimes very slowly propagate toward failure.

If the bearing is scored and damaged, it was likely oil starvation. Either the oil was low, or the oil pump was not putting out enough oil, or the flow to that rod bearing was blocked somehow.

 

Would a 4.0 L blow if you drive heavy footed (80 mph interstate)

 

Yes, 100% definitely.

 

Oil was full. I checked it on thurs night and it blew sat afternoon. I think it was just a fluke. I have owned two other 3.4's and driven the crap out of them with no mercy and they had more miles. Those motors never gave me any issues minus a timing belt idler that went out...

 

So an 07 tacoma would blow up driving 80 on the open interstate?