9 YEARS without changing the antifreeze?

Stung me with that terminology.

I'm at 76k miles and a 14 year old T4R...means I am still good...nope...that 'lifetime' named stuff was a bad idea.

You still need to change the fluids at regular intervals.
Look in your service manual.

Be interesting if the first model years 5th gen do this like the 4th gens.


Change your antifreeze folks.

Is it not 160K km or 10 years ? Why would I change it any earlier ? Did Toyota just make that up for fun ?

I dumped my first oil at 1000km and installed a magnetic drain plug(then do every 12000 km )
dumped my diffs and Tcase at 5000 km ,( then do every 50 K km )
dumped my PS fluid at 20,000 km (then do it every 50K km )
dumped brake fluid every 3 years

Anything with metal particles in it I am a firm believer of getting it out early to get the break in particles out but antifreeze nope , not so much I just test it for freezing point every year and use PH strips on it for its corrosion resistance test .

I even put magnetic fill plugs in my rear diff and TC and take them out every engine oil change and clean them off and check the fluid level , to keep as much metal filings out of the oils as possible

you wont find anyone else on this fourm as maintance anal as me I guarantee it , and the funny thing is I bought it for the wife so its not my main concern and I hardly drive it .

I got a BJ 42 diesel and 2 dodge cummins diesels that I drive , you can't even fathom the maintance love they get

please don't give me a head scratch , thank you

Any update OP?

put a sniffer in overflow did not detect anything , goin put die in this week and look for leaks, bjoints are changed out did a little write up thread and posted it, will keep posting updates as i do them on the possible headgasket failure , my buddy owns a radiator shop and says they had a totota in a while ago couldn't remember if it was a rav4 or 4runner and it was loosing antifreeze and they could not figure out where it was going they been in. business 40 years and that one stumped them after doing every test possible , gona keep a close eye on my level and continue with more tests if anymore dissapears.

Negative sniffer test means head gasket should be OK and your head is unlikely to be cracked. Great news.

You can send a sample of the motor oil to Blackstone labs and they test for antifreeze. That looks for cracked blocks and heads where it is water-to-oil.

These things can be really frustrating.

If all else fails, this stuff really works: https://barsleaks.com/product/radiat...-leak-tablets/ .

Very curious to see the outcome here. BTW, you're far from the only person doing maintenance like this. I changed my oil at 2K, 5K and every 5K from there using Mobil 1 0-20 which is way too often for oil like this but it's cheap peace of mind. Magnetic drain plug in the oil pan and magnets on the oil filter housing. Your magnetic fill plugs on the diff and t-case aren't doing much of anything. You need magnetic drain plugs so they are catching metal that falls to the bottom. Metal doesn't float up top where the fill plugs are. I wish you luck and certainly hope to hear there is something else going on and not a head gasket failure.

i beg to differ the fill plug magnets are doing nothing , i clean lots of metal off them every time i check them the oil flows directly over them when vehicle is moving , this in turn keeps your drain plug magnet from reaching its metal holding saturation point so soon and will continue to catch things longer especially usefull for those that dont't change the gear oil often , Yes thats some pretty deep stuff but thats how my mind works .

So what happened here? Thread died but you never told us the outcome!

sorry wanted to give it some time , after adding a liter of antifreeze to rad and overflow rez the level has not moved since , its a mystery where that liter went.

the coolant is good til 100,000 miles

What ever happened?

Nothing happened. Just an over reactive poster who “LOST ALL FAITH IN TOYOTA”, even though they didn’t have an issue or take the time to figure it out prior to posting.

Nothing to see here…

I still have yet to hit 100,000 miles.
Built in September 2003.
91,000 miles.

They lost coolant for some reason. Sounds like there was an issue.