Anybody have a 4.0l V6 timing belt break?

On one of the recalls, the dealer told me I better change the drivebelt soon and I only had about 40K on the truck.

 

Drivebelt is not a timing belt but should last a lot longer than that.
My 2010 had 83,000 miles when I traded it in last month and never had to change a belt or even the wiper blades.

 

4.0 has a timing chain and it's an interface design meaning it is internal. Very unlikely to break but if it does it could cause catastrophic damage and punch a hole through the block. Now my 3.4 V6 and all other V6 years of first gen Tacomas had timing belts, and those are non-interface, meaning they are on the outside of the engine protected by a cover. So if a timing belt breaks in a 3.4, it wont damage the engine, it will leave you where it broke though but that's about it. Change it every 90k miles and you wont have a problem, do the water pump every other timing belt change.

 

This is a good thread. So basically don't worry about changing it. I'm gonna have bigger problems if the chain needs replacing lol...
163k miles. I should change serpentine belt though soon...

 

Chain.
ah see it's been answered.

 

Who needs frames? The body should still hold it together like on top gear

 

When you say "interface" and "non interface" are you sure you are not referencing interference and non-interference?...

An interference design means the valves will impact the pistons if timing is severely off, ie a broken timing belt( think Honda engines). And of course a non-interference engine won't be damaged by a timing belt failure(most Toyota timing belt engines are non-interference by design for ease of repair and longevity of design).

 

Ya, I know. Just pointing out some of the things salesmen tell you that you don't need.

 

read below

You can have a motor that uses an internal timing change that has a non-interference design (Valves fully open will not hit the piston at the top of its stroke)

Also... on the 3.4L v6 on the first gens.... REPLACE THE WATER PUMP EVERY SINGLE TIME YOU DO THE TIMING BELT..... the real reason for changing the timing belt on those motors is the water pumps which tend to start leaking around 100k or so... the belts themselves, you will find very VERY few stories of them actually breaking.

 

Quoted and put in bold font to help keep factual information alive. Internal and External timing chains are just a "packaging issue". Where the chain is located has no relevance to Interference and non-interference engines. The main advantages of an interference valve design is for higher compression and the potential for tighter clearances and control of valve overlap.

 

Yep. It's just part of the UPSELL that they do to the uneducated.
My 1999 was in for a 5000 oil change and recommended a drivebelt.
I said to leave it until the next one at 45000.
When I took it in I told the service writer. When I got the truck back the tech said the belt was fine.
Also had them tell me that I needed new wipers. Refused and turned out the windshield was just dirty.

 

You guys rock! Absoutely the best website with the best people i've ever been on. Thanks!!

 

I am surprised the chain is a lifetime chain on the 4.0 2011. It is fantastic to hear though ha ha.

 

At 90,000 miles, on my 2001, had the timing belt changed as recommended, and the water pump too, as it was dripping (they said).

My 2005 went 102,000 miles and with a chain, nothing to change.

My 2010 is going on 72,000 miles, and no chain issues, but at 66,000 miles the water pump was replaced.

 

With timing chain there are only two (three if you split guides) to maintain.

Idler (yes they have idler too) and guide(s) shoes. Now if you use good oil, and lubrication system works as supposed to than both should last for very very long time.
If oil is cheap, and lubrication is not up to the par, both will need replacing at some point, most likely along side the engine.

 

I have 254,XXX on i belive is the original motor right now and I have heard that the chain would go out between 250-300k miles. This is my families only vehicle. Should I replace the thing just to be on the safe side? By the way, I'm an auto tech so I would do it my self.

 

I'll just leave this here.
350,000 Miles
2008 Tacoma 4X4 still going strong

 

This thread was great, I have an 05 , now that I know that I have the chain, I wonder how important it is to deal with the transmission flush, or dealing with my lifters. I run royal purple full synthetic in it, and it's now at 185,000 miles. Any suggestions?

 

The transmission is kinda up to you. We have people with over 300k that have never serviced theirs. Toyota used to say 100k under severe service such as towing, but has since backed it up to 60k miles.
https://www.tacomaworld.com/threads/how-to-drain-refill-automatic-transmission.63851/

https://www.tacomaworld.com/threads/diy-full-flush-for-automatic-transmission.68462/

As far as the lifters go, they are shimless buckets, you can’t just adjust them. You have to buy new buckets. Most people don’t bother with adjusting the valves unless they’re tapping/making noise. Some people opt to re-do the heads when they have to do the head gaskets on the 05 and 06’s.

 

3+ years later, my 2010 has 113,000+ miles now. No chain issues still.