1HDT Turbo Sub-assembly differences and repair (1 Viewer)

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Joined
Jul 21, 2016
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528
Location
Atlanta, GA
Finally after a 1.5 month trip to Asia, I can finally get back to wrenching on the cruiser. I can't tell you how much I missed getting oil all over myself :D.

After buying the cruiser and driving it back from Vancouver to Atlanta the Turbo sub assembly had a minor fail. The sub-assembly is the part that feeds oil to and from the turbo. It was not a critical failure but a severely annoying one. Every couple hundred miles I had to refill the motor oil. I wound up using quite a bit of the stuff. Also it made a huge oily mess on the underside of the cruiser. The silver lining is that nothing will ever rust under neath the cruiser.

I took a few pics of the actual part. The part from 1991, while ok, does pose a threat to failure at some point. This piece is prone to extreme temps and constant heating and cooling cycles. And its under pressure. Then came another iteration where the pipe routing is slightly different making installation slightly easier. The current iteration actually has a brace to prevent any damage to the part.

Its not an expensive part and fairly easy to switch out. I do recommend for anyone who goes on longer trips to switch out this part or at the very least to check it out. Any oil means its about to go. When it does go, you better have a s*** ton of oil on hand.

Here the pics:

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This is a pic of the 1991 assembly vs the newer one. The routing on the newer one makes it far easier to install without stressing any of the points.

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This is a pic of the newer sub assembly vs the newest iteration which includes a brace to prevent even the slightest movement. I do believe that this will save any future problems.

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Oldest assembly vs newest assembly. The differences are quite clear.

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Closeup of the new assembly. Very clean joints.

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Closeup of the old assembly.

Now a few pics of the failure points. Its not a cracked pipe or anything like that. The joint expands and oil leaks.

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Hope this helps out :)
 
I've got the newest one sitting on my shelf, thought I'd suffered a failure but it turned out I just needed a catch can.
 
I've got the newest one sitting on my shelf, thought I'd suffered a failure but it turned out I just needed a catch can.

When that thing fails you will definitely know it. The entire underside gets covered and the entire back including the rear windshield gets a nice film of oil. Plus the driveway gets a good puddle of oil.

A catch can is next on my long list of things to do.
 
When that thing fails you will definitely know it. The entire underside gets covered and the entire back including the rear windshield gets a nice film of oil. Plus the driveway gets a good puddle of oil.

A catch can is next on my long list of things to do.

Ya, mine was more of a drip, and an oily mess under and behind the turbo than a gusher, lol.
 
I had the same problem but on 12h-t. First i thought it was the seal between the oil tube and turbo that leaks but the seal was all right.
I then checked the oil tube flange for flatness and it was slightly warped. Some sanding and no more oil leaks.

006.jpg


Not the best two pics to show how warped the flange was but gives you an idea.
032.jpg

033.jpg


And the sanding "deck". Piece of flat plywood and 240 grit sanding net.
034.jpg
 
Thanks so much for sharing, I checked mine, and seem it is leaking a little bit. I would assume the part number is 15407-17010, and I will order it on the next order from amayama.
 
Can someone confirm the correct part number for the updated pipe sub assembly with the brace?

The local Toyota dealer said part number 15407-17010 is invalid. 17011 and 17020 both show though. According to this thread, 17020 is the updated one with the brace? ct26 turbo oil supply line leak possible solutions.
 
Can someone confirm the correct part number for the updated pipe sub assembly with the brace?

The local Toyota dealer said part number 15407-17010 is invalid. 17011 and 17020 both show though. According to this thread, 17020 is the updated one with the brace? ct26 turbo oil supply line leak possible solutions.

Here are all the parts you need:
15407-17011 HDJ80 New model Turbo Oil supply/drain (ending in 13 is the old model)
15471-58010 Gasket Turbo Oil In (Turbo Side
90430-12221 Crush washer (you need 2) Motor Side. Washer to go on either side of banjo bolt
90401-12097 Banjo Bolt (Good idea to have just in case

If your hoses are good then you will not need the following. But advisable.
90467-26001 clip for rubber hose (you need 2)
90910-05206 Rubber drain hose


Hope this helps!!
 
Here are all the parts you need:
15407-17011 HDJ80 New model Turbo Oil supply/drain (ending in 13 is the old model)
15471-58010 Gasket Turbo Oil In (Turbo Side
90430-12221 Crush washer (you need 2) Motor Side. Washer to go on either side of banjo bolt
90401-12097 Banjo Bolt (Good idea to have just in case

If your hoses are good then you will not need the following. But advisable.
90467-26001 clip for rubber hose (you need 2)
90910-05206 Rubber drain hose


Hope this helps!!

Thank you very much for the info! Going to the dealer next week to order everything on that list. Mine isn't leaking but I'm going to replace it anyway for some peace of mind.
 
Thank you very much for the info! Going to the dealer next week to order everything on that list. Mine isn't leaking but I'm going to replace it anyway for some peace of mind.
I got most my parts from @beno . The Toyota dealer down here had no clue what I was talking about. Beno really knows his stuff and delivers quickly!
 
If I were in the US then I would definitely order them from Beno :)
 
If I were in the US then I would definitely order them from Beno :)

I'm in Canada and I order the bulk of my HDJ81 parts from @beno as well. Have stuff shipped to the border and run down to pick them up.
 
Picked up the parts from the local dealership today. Guy at the parts counter said 17013 is the newest one, and he appears to be right. The 17013 I got has the brace.

Anyone know the torque specifications of the sub assembly nuts and banjo bolt?

IMG_8488.JPG


IMG_8487.JPG
 
Picked up the parts from the local dealership today. Guy at the parts counter said 17013 is the newest one, and he appears to be right. The 17013 I got has the brace.

Anyone know the torque specifications of the sub assembly nuts and banjo bolt?

View attachment 1349138

View attachment 1349139
None of my manuals specify torque. I just went by feel when taking it off and applied the same amount to get it back on. I just check it every now and then to make sure it's not coming loose. It would be nice however to know the torque specs
 

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