Timing Belt break - 2006 tundra 4.7

My 2006 tundra had the timing belt go out recently (had the 1st one changed at 125k - was pondering the second swap soon - truck has 240k mi)- torn between replacing this or letting the truck go. What is a fair repair cost on this? It is an interference engine 4.7.

 

That sucks, as far as a fair price for repair, it depends on what was damaged. Camshaft lobes, piston and cylinder wall damage, bent valves, etc...
Most likely there are bent valves and if that is the only issue then it will run you at least $2000 to $2500 for repair and parts. Honestly your money might be spent more effectively if you purchased a used 4.7l and had it installed or you could always install a 3.4l, the motor mounts should be the same.

 

I have 4.7 l I force engine sitting on the shop floor if you're interested

 

I appreciate the both responses. I sold my truck to the shop. Even if I did fix the truck everything else still had 240,xxx miles on it. Hated to see it go - best vehicle I have ever owned.

 

What are you asking for the motor?

 

I sold it last week.

 

So the guy with the million mile Tundra didn't influence you? I bought mine with 350,000 miles on it and now have 426,000 miles and I don't loos a drop of oil between changes, and still take this truck up to it's redline......very often. If the timing belt brakes, you need to do a leakage test on the engine.......this will tell you if anything got damaged without guessing or taking the heads off.....like why, what a waste of time. Leakage test my friends, sometime no damage may occur, sometimes it can. A quick leakage test will save you all the time.

 

Dang

 

I know of many instances where 4.7 timing belts have broken and no internal damage has resulted. My only theory is if it happens at lower rpms you are usually ok.

 

My friend bought the gen 1 Tundra from used car dealer at 110k (not sure if timing belt was replaced) and he had it until 240k (no timing belt replaced) then sold it to me. I replaced waterpump,thermostat, timing belt and tensioner at 245k and it now has 291k.

 

You're right. We recently had a 4.7 that had the tensioner go out. Threw the belt all out of wack. Wouldn't start initially. Checked, fuel and spark, both were good. Pulled the timing covers, WAY out on both sides. Easily 6/7 teeth. Pulled the tensioner, replaced it, lined everything up, started right up, like nothing. Now, if you're going 80mph down the interstate and the belt breaks, I can see damage. But low RPM, belt breaks, tensioner poops itself, you're gonna be ok.

 

Here's another Had the exact same issue with my 2005. First timing belt replaced at 110,000. Cost was $650 for belt, water pump and labor in 2012. But my second belt recently broke at 180,000 and was told by dealer and a number of well respected Toyota specialized shops that the 4.7 engine was "an interference engine" and was toast. Couldn't bear to give her up for scrap or to spend the $3,000+ to change engines. Took a chance and replaced the belt. Good compression, no codes, no noise and runs great!! Got my truck running for cheap money and a smile on her face and on mine too.
Lessons learned:
1) Listed as interference engine, but make sure you check for valve damage as it may NOT have occurred if belt broke.
2) Use a "Toyota" timing belt --no other --- as the second belt was not OEM. NOT WORTH THE FEW BUCKS YOU SAVE

 

The tensioner for the timing belt, once set is bolted on in it's set positon and should not come loose. It is not the same type tensioner as the drive belt. It's an interference engine alright, but doesn't mean you will bend valves every time a timing belt breaks. In that case you do a cylinder balance test, which is a combination of a compression check and leak down check.............I can tell with just a leak down test. Most of the timing belts I see that break are from first start up in the morning, but can happen anytime. Just replace it at it's due time. Look in de Book.

 

Hey Zombie, I was just reading this thread from Feb and you said:
"Most of the timing belts I see that break are from first start up in the morning, but can happen anytime."
I'm thinking mine just did that. I've been out of town for a week and today tried to start my truck. it cranked and tried to fire one time but didn't start. Now it turns over, seems kind of fast and makes a higher pitched whining sound when turning over. Sounds like there is no compression and doesn't fire. Is this what they sound like when the timing belt breaks at start up? This is an 02 with 320,000 miles on it. Not sure when it would have had a timing belt replaced. Thanks

 

Welcome to the forum. Since this thread is a bit older you may want to quote zombie or tag him. So you get his attention. @zombie

 

On my 89 V6 toy i let it sit for 2 weeks and a mouse built a nest in the timing belt that made it break.

 

Hey House, my Camry timing belt went out and it sounded and acted just like what you described. My Tundra has never had a broken belt so I can't compare that vehicle.