Heater hose Tees...

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Documenting: 135000 miles, tees shot, tees and hoses replaced. No failure while installed, just replace preemptively and they crumbled once removed.

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Newbie question. Are there only 2 and are these them?

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FYI, learning my way around the truck but every time I turn around someone on here is saying "replace X for PM" so I need to figure out where X is, how to replace it, and how much it's going to cost. You guys are killin' me! ;)

Would an hour be a safe estimation for the length of the job? Trying to schedule when to do this. Have the radiator, water pump, etc. replacement job coming up when it cools off.

Also, forgive the dirty engine bay. It's been too hot this summer to spend hours under the sun cleaning the engine bay. I'm sure it'll be too cold this Fall and Winter to do it as well.
 
Newbie question. Are there only 2 and are these them?

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FYI, learning my way around the truck but every time I turn around someone on here is saying "replace X for PM" so I need to figure out where X is, how to replace it, and how much it's going to cost. You guys are killin' me! ;)

Would an hour be a safe estimation for the length of the job? Trying to schedule when to do this. Have the radiator, water pump, etc. replacement job coming up when it cools off.

Also, forgive the dirty engine bay. It's been too hot this summer to spend hours under the sun cleaning the engine bay. I'm sure it'll be too cold this Fall and Winter to do it as well.
Those are them. An hour seems reasonable.. if everything comes apart easily it could be ten minutes.. but if the hoses stick to the old Ts you’ll want to be careful about separating them to avoid damage.
 
While working around the engine I noticed some coolant residue on the passenger side rear coil pack. Directly above is a heater hose tee...
Ordered:
87209-60C01
87209-60C10
96136-42501 x6

Parts got delayed, should be here tomorrow and ill switch them out. Curious to see the shape they will be in. At 146k miles they havent failed but there is pink crust around the heater hose and tees at the joints which showed up in the last 1k miles sometime as didnt notice this at oil change. Anyone do this recently? I do have coolant. How much is lost from disconnecting both hoses?
 
While working around the engine I noticed some coolant residue on the passenger side rear coil pack. Directly above is a heater hose tee...
Ordered:
87209-60C01
87209-60C10
96136-42501 x6

Parts got delayed, should be here tomorrow and ill switch them out. Curious to see the shape they will be in. At 146k miles they havent failed but there is pink crust around the heater hose and tees at the joints which showed up in the last 1k miles sometime as didnt notice this at oil change. Anyone do this recently? I do have coolant. How much is lost from disconnecting both hoses?
I don't remember much coolant leaking when I did mine but I only did the Ts I didn't replace the hoses that were lower. The trick to not loosing much coolant is do the work when the engine is cold, don't open the radiator cap and have your parts close to swap out as quickly as possible.
 
A cup was lost minimum, maybe more. I did have to fire the car up from cold to be able to work on it, less than 2 minutes run time. The only big deal for me was trying not to get coolant everywhere especially on all the electrical harnesses in close proximity. For this reason I took each hose apart piecemeal to empty the lines at each connection. This made it easier to catch the coolant with rags and ultimately easier to remove the 2 hose clamps from the firewall. I broke the one tee somewhere in the struggle but it didnt take any effort. The other five sides seem stronger. The inside of both look fine to the eye but hard to tell the integrity. The pink crust is what gave me the indication to check these. If you dont care about making a mess you can swap the assemblies out in under 30min.

If you are at 16yrs/146k maybe look into changing on a part sale promotion. I don't think the parts are worth holding on to for emergency spares, they are trash.



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I’d love to know why some of these crap out and others remain perfect. Mine are still as-new with over 200k miles, and I live in a hot climate.
 
I’d love to know why some of these crap out and others remain perfect. Mine are still as-new with over 200k miles, and I live in a hot climate.
They usually don't give any warning before failure so that's why a lot of people just replace them as maintenance because they are cheap and easy to do. The alternative is getting stranded and needing parts in the middle of nowhere.
 
They usually don't give any warning before failure so that's why a lot of people just replace them as maintenance because they are cheap and easy to do. The alternative is getting stranded and needing parts in the middle of nowhere.

Agreed, but I took mine out to check and torqued on them to try to get them to fail, and I wasn’t exaggerating above.. they are factory perfect.

Where @08URJ200 and others have had clear degradation and failure.

For those wondering the Ts themselves are available separately if you want to save some money on the hoses and clamps. I’ve had two on the shelf for over 100k but haven’t needed to install them.
 
After removing the hoses and T's, I would not recommend mixing old and new. If I had ordered the T's only, I would be ordering the assemblies asap. But this is an older truck. For the price, it was worth putting fresh clamps on new hoses. Solid seals for another +100k for sure.

It may have more to do with age rather than mileage. This was a company car in Puerto Rico for the first half of its life so it has seen some heat. Since Ive had it, it may get 6k a year on the odometer. 16 yrs is a long time though.
 
Just replaced my tees and hoses. 2010 LX570 with 187,000 miles. My tees were in near perfect condition with just a little bit of bubbling inside them. I tried to break them by hand and they are still solid. It was an easy job (less than one hour) and the hardest part was squeezing the clamps closest to the firewall. The tabs to squeeze were pointing down and it was difficult to get pliers down there. Since I had new hoses I cut the old ones to make it easier to twist and pull them off. I also removed most of the air filter box and the top engine cover bracket. Very little coolant came out. One less thing to worry about. :)

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