DIY: Replacing heater hose pipe T's *important* (2 Viewers)

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My 1994 80-series heater Ts were plastic too. I changed all those on that truck back then.
 
My 1994 80-series heater Ts were plastic too. I changed all those on that truck back then.
I mentioned earlier, somewhere along the way it changed. When you changed it, do you remember what kind of clamps it had on it? Were they OE like this?

2018-11-21 15.14.29.jpg


Here's a pic of @SNLC 1995 FZJ80 w/ brass Tee.

Screen Shot 2021-09-16 at 3.12.09 PM.png


One more pic of 87209-60290 in the package with the coveted brass Tee. LOL.

Screen Shot 2021-09-16 at 3.40.51 PM.png
 
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So was the change from brass to plastic-- which would make sense based on the fact that the 100's have plastic. I will have to assume I just ordered a cheap plastic T with two expensive hoses I cannot use.

I guess I missed the caveat that Toyota eventually changed to plastic on the 80's- I jumped too soon.
 
Well, that last picture is dated/ordered May 2019.... so.... :meh: My guess is it will come as such.

And Super90's 80 series was a 1994 with plastic and SNLC's was a 1995 with brass. Toyota probably just used whatever parts they had on hand or could source at the time. I could only find two pictures of the replacement part assembly and they are both brass.
 
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My 1994 80-series heater Ts were plastic too. I changed all those on that truck back then.
Ahhhh ohhhh
So was the change from brass to plastic-- which would make sense based on the fact that the 100's have plastic. I will have to assume I just ordered a cheap plastic T with two expensive hoses I cannot use.

I guess I missed the caveat that Toyota eventually changed to plastic on the 80's- I jumped too soon.
We're pullin' for ya.
 
I am starting to feel hopeful that Toyota went from plastic to brass. I searched the 80 series forum and came across this from April 2021 where South Texas 97 shows his original hose set and the recently ordered replacement. If this is true then Toyota learned their lesson about using plastic Tees and switch to brass. Then went back to plastic for the 100 series. I can dream.

Heater Hose Side by Side.jpg


Heater Hose Installed.jpg
 
OK-- got the OEM 100 series factory Tee and the OEM (updated) 80 series brass Tee today.

Both the plastic and the brass Tees have the same ODs (17mm/14mm-18.5mm/15mm bulb end) but the brass has about 2.5mm larger IDs. This is because the brass is pretty darn thin.

I would rather use the Omega stainless over the plastic or the thin brass but I will go with the brass. I think it will be a big pain to push in the 3/4" (19mm--21mm bulb end) Omega into a set of fresh OEM hoses.

But what clamp to use. For some reason, on the 80's, the factory used the roll band clamp on the top legs and a spring clamp on the bottom. I assume because the top hoses come with the T and it would make for bulky packaging to use the large spring clamps.

Even though the brass walls are pretty thin I am going with my new spring clamps on all legs-- any thoughts from the forum?

IMG_2153.JPG
 
OK-- got the OEM 100 series factory Tee and the OEM (updated) 80 series brass Tee today.

Both the plastic and the brass Tees have the same ODs (17mm/14mm-18.5mm/15mm bulb end) but the brass has about 2.5mm larger IDs. This is because the brass is pretty darn thin.

I would rather use the Omega stainless over the plastic or the thin brass but I will go with the brass. I think it will be a big pain to push in the 3/4" (19mm--21mm bulb end) Omega into a set of fresh OEM hoses.

But what clamp to use. For some reason, on the 80's, the factory used the roll band clamp on the top legs and a spring clamp on the bottom. I assume because the top hoses come with the T and it would make for bulky packaging to use the large spring clamps.

Even though the brass walls are pretty thin I am going with my new spring clamps on all legs-- any thoughts from the forum?

View attachment 2791659
I have the stainless one, and have been using it for more than 2 years. I don't even worry about it anymore.
 
I have the stainless one, and have been using it for more than 2 years. I don't even worry about it anymore.
BS-

I agree- the stainless Tees are the way to go but the 4-seasons version I had on my truck requires you to really cinch up the hose clamps a bit more than I am comfortable with.

I have a set of the 3/4" Omega and was thinking about throwing them on the lathe and turning them down to the OEM metric dimensions. I think the wall thickness is healthy enough to do this.

I have no idea why I am messing for long on these Tees-the 4-seasons do the job just fine but I went down the rabbit hole like I often do. After five years of owning a P38 RR I am sort of savoring working on the small issues my truck has.
 
I installed the 4-seasons last year. No complaints.

When I pull the intake manifold to service the top side and replace the starter, I may move to the Omega just because I like the design a little better. That's the only reason for touching the Ts at this point.

1632143382169.png
 
I installed the 4-seasons last year. No complaints.

When I pull the intake manifold to service the top side and replace the starter, I may move to the Omega just because I like the design a little better. That's the only reason for touching the Ts at this point.

View attachment 2791989

My 4-seasons were weeping on the old hoses and I had to really cinch down the hose clamps to get them to stop. Yours look amazing with the new hoses and just the OEM spring clamps. If mine looked this good I would have not even begun to mess with them.
 
Both the plastic and the brass Tees have the same ODs (17mm/14mm-18.5mm/15mm bulb end) but the brass has about 2.5mm larger IDs. This is because the brass is pretty darn thin.

I would rather use the Omega stainless over the plastic or the thin brass but I will go with the brass. I think it will be a big pain to push in the 3/4" (19mm--21mm bulb end) Omega into a set of fresh OEM hoses.

....Even though the brass walls are pretty thin I am going with my new spring clamps on all legs-- any thoughts from the forum?
I'm sure both the Omega and OE Brass Tee will last a lifetime but I prefer the brass. Two piece design and has better flow.... and exudes craftsmanship! lol.

I would go with the OE spring clamps on all three ends.
 
100TD makes a good point. Change the hoses... and if you cut the hoses, you won't have to deal with the position of the OE clamp on the T-fitting nor bits and pieces of plastic breaking off into the hose.

You said old school so I'm guessing you went with the worm drive clamp and not the constant torque type? If so, you might want to consider the later type for this application. The hose will eventually shrink and get compressed. The constant torque clamp will accommodate that.


Edited for part numbers:
(I take no responsibility:flipoff2:)

(98-02) Complete hoses, Tees and clamps
• (2) Heater T’s (87248-60460)
• (1) Heater hose (87245-6A190)
• (1) Heater hose (87245-6A180)
• (1) Heater hose (87245-6A220)
• (1) Heater hose (87245-6A210)

• (1) Heater hose (170mm)(99556-20200)
• (1) Heater hose (87245-6A201)


• (8) Hose Clamps (96134-42100) (Horizontal hoses off Tee)
• (4) Hose Clamps (90467-19022) (Vertical hoses off Tee)

-----------------------------------

(03-07) Complete hoses, Tees and clamps
• (2) Heater T’s (87248-60460)
• (1) Heater hose (87245-6A190)
• (1) Heater hose (87245-6A180)
• (1) Heater hose (87245-6A220)
• (1) Heater hose (87245-6A210)

• (1) Heater hose (155mm) (99556-20155)
• (1) Heater hose (87245-6A800)


• (8) Hose Clamps (96134-42100) (Horizontal hoses off Tee)
• (4) Hose Clamps (90467-19022) (Vertical hoses off Tee)

Forgive me if this has been answered somewhere in the 40 pages of this thread and I missed it, but why are some of the parts of this list in red and others in white? Is that significant?

I’m about to head to the dealership to buy everything I need for this and want to make sure I understand.
 
RED highlights the difference between the two lists.
 
Anyone know if the tees are generally available at auto parts stores? I can't seem to get the right search terms. Local Toyota dealer asking $13 each and doesn't keep them in stock.
 
Anyone know if the tees are generally available at auto parts stores? I can't seem to get the right search terms. Local Toyota dealer asking $13 each and doesn't keep them in stock.
You should state which Tees you are looking for?
 

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