Replacing Timing Chain 2007 3UR-FE

My truck is approaching 300,000 miles and I want to do some preventative maintenance. I was going to have a retired Toyota master tech do the work as I was hesitant . But he declined as he is moving more into custom work and not repair work. Looking for tips and suggestions . I'm thinking about buying the 2007 tundra master tech book set to help out with the job and there are a few videos out there . Curious what else I should replace while I have it torn apart currently I plan on replacing all 4 timing chains , tensioners , guides etc , water pump , alternator , thermostat . What else should I replace ? Oil pump ? Also am I in over my head or is it straight forward as long as I follow the manual and time everything currently? Any feedback would be much appreciated.

 

If it ain't broke, don't fix it. None of those are maintenance items.

 

What he said ^^^

 

Well I dont ever plan on getting rid of the truck . Just wanting to bulletproof it. Getting a little bit louder as I get more miles just want the peace of mind .

 

Well I dont ever plan on getting rid of the truck . Just wanting to bulletproof it. Getting a little bit louder as I get more miles just want the peace of mind. Dont want it failing and taking the motor out .

 

To give my $.02 though, reliability is all about finding a good spot in the bathtub. While the chance of failure does increase with engine hours, you also have a steep curve of premature failure to consider as well. Whether it be part defect, installation issues, or any other mishap that can occur, I'd almost be worried about increasing the chance of engine failure by replacing non-maintenance items.

Maybe try running a seafoam oil change first if you're worried about engine noise? I'd think the chance of making things worse would be much lower by taking a less invasive approach to begin

 

I've heard of people putting seafoam in the oil but really hesitant to try after I put some on my fuel and shortly after one of my catalytic converts began rattling and it turned out the honey comb is loose inside and throwing codes

 

The thing about tearing into a higher mileage vehicle is, you don't want to let pandora out of her box. You might make yourself vulnerable to leaks or tweak something in such a way that it will break. You might just keep doing what you have been doing and change nothing, whether it be components or driving habits.

Somebody got 1 million miles out of a 5.7 Tundra with nothing more than routine maintenance. And, he was pulling trailers and hauling loads.

FWIW.

 

300,000 miles don’t use sea foam.. There’s a good chance it will break too much shit loose and cause real problems! I’ve seen it plug oil pickups! Much older carbureted vehicle and was catastrophic!

 

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