Finding true 10mm ID PS rated hose?

[Kuma601]

Any of you aware or know a supplier that will sell to end users a 10mm ID oil or fuel rated type hose?

The PS lines on the Toyota are 10mm ID and these are made by Yokohama as OE for Toyota. Toyota gouges owners by only offering them as a the whole line which includes the hard line. For my application is costs $165. The generic 3/8" is to tight and 7/16" is a bit loose. The Toyota mechanic says that when he uses 3/8" hose some of the pumps get starved so they begin whining due to the pressure change and flow differences. He doesn't recommend I use 3/8".

Makes my head spin because there are so many cars with metric hoses that stateside this isn't an option. I'm not about to buy a $165 return assembly. What should be a sub 10 minute swap turns into a big $ and get under the car ordeal if replacing the whole line. Seems ridiculous to spend $165 just to get a hose and leave the rest of the line unused. What is Toyota thinking?!

What I need is the "U" hose that will connect to the reservoir.

 

[garfunkle24]

Amazon link

That's a pretty tight bend radius for a non-molded hose.

 

[Renegade1LI]

I would try a local hydraulic hose shop. Most good shops stock metric house and fittings.

 

[Wrench97]

https://www.amazon.com/dp/B07WF4FWC7/?tag=atomicindus08-20

 

[kwb]

What is your time worth?
I get the frustration and you should be able to find what you are looking for at some point but honestly if you have spent more than a 2-3 hours on this are you really going to come out ahead? You still are going to need to buy the 10mm hose and as an off the street nobody at the hydraulic shop that has it you are going to be $40 or the shop minimum.

 

[stonesfan68]

Forgive me if you've already looked, but did you check Rock Auto for an alternative? Sunsong makes hoses that have good reviews. I just bought one that looked identical to the OEM but cost $7 instead of $120. I figured I'd give it a shot because I can buy a lot of hoses and steering fluid for the price difference. The hose was made in Taiwan which took me by surprise. If they make the hose then you should be able to disconnect the "u" part that connects to the reservoir and carry on with the day.

 

[whateg01]

What is your time worth?
I get the frustration and you should be able to find what you are looking for at some point but honestly if you have spent more than a 2-3 hours on this are you really going to come out ahead? You still are going to need to buy the 10mm hose and as an off the street nobody at the hydraulic shop that has it you are going to be $40 or the shop minimum.

Why would he need to take it to a shop? It doesn't look like a swaged fitting.

 

[iflyatiger]

Any of you aware or know a supplier that will sell to end users a 10mm ID oil or fuel rated type hose?

The PS lines on the Toyota are 10mm ID and these are made by Yokohama as OE for Toyota. Toyota gouges owners by only offering them as a the whole line which includes the hard line. For my application is costs $165. The generic 3/8" is to tight and 7/16" is a bit loose. The Toyota mechanic says that when he uses 3/8" hose some of the pumps get starved so they begin whining due to the pressure change and flow differences. He doesn't recommend I use 3/8".

Makes my head spin because there are so many cars with metric hoses that stateside this isn't an option. I'm not about to buy a $165 return assembly. What should be a sub 10 minute swap turns into a big $ and get under the car ordeal if replacing the whole line. Seems ridiculous to spend $165 just to get a hose and leave the rest of the line unused. What is Toyota thinking?!

What I need is the "U" hose that will connect to the reservoir.

I just had this same issue on my Lexus gx470.. I got to the point where I was about to install the 3/8 hose but just couldn’t do it i Just wanted to do it right. Good news was Autozone had the full part including the metal and rubber hoses for right around $60.00 I ended up using just the rubber hose that ends at the steering rack, it fit perfectly. The part I bought look the same or similar to your picture. I hope this helps!

 

[Kuma601]

Called countless hose shops, each one of them came back with 3/8" hose. Online I found Codan has 10mm ID hose but they are in Denmark, their products don't make it stateside. One of the hose shops suggested a Jiffy generic hose but among the applications listed they are temp rated to 220F. That seems a bit close.

I took a shot from iflyatiger and called Oriellys about the whole part. They have one for $38 so I had them place an order.

 

[4xdog]

Five feet of 10mm ID buna-n rubber hose at McMaster-Carr for $25 (medium pressure) or $17 (low pressure).

McMaster-Carr

McMaster-Carr is the complete source for your plant with over 595,000 products. 98% of products ordered ship from stock and deliver same or next day.

www.mcmaster.com

Although I agree with @garfunkle24 -- that sharp U-bend looks like a molded section.

 

[Kuma601]

O'Reilly had the wrong return hose so the correct one was actually $133. Found one online with the correct cross reference for $38 so ordered that one instead.

I measured the one at O'Reilly's and the hard line and hose is a true 10mm. Well, hard line was 10.10mm and the hose came in at 9.85mm ID. The Chinese are making 10mm hose so why it is so hard to find in auto parts store is SMH. Looks like Nissan also uses 10mm PS hoses too. I wonder what Honda is using? (This will broaden parts availability for adaptable things like this hose.)

 

[whateg01]

O'Reilly had the wrong return hose so the correct one was actually $133. Found one online with the correct cross reference for $38 so ordered that one instead.

I measured the one at O'Reilly's and the hard line and hose is a true 10mm. Well, hard line was 10.10mm and the hose came in at 9.85mm ID. The Chinese are making 10mm hose so why it is so hard to find in auto parts store is SMH. Looks like Nissan also uses 10mm PS hoses too. I wonder what Honda is using? (This will broaden parts availability for adaptable things like this hose.)

What is O'Reilly price match policy?

 

[Kuma601]

I found this on their web site:

Low Price Guarantee​

O'Reilly Auto Parts strives to provide the lowest possible price to our customers; however, we are currently unable to price match online competitors. Our retail locations do have a low price guarantee and will match the price of most local competitors.

The Toyota dealers will match Toyota dealers if they have an online store. I came across a genuine Toyota return line for $135 with free shipping. I really want to fine a stateside source for 10mm PS hose though.

Looked through McMaster's offerings, they have buna-n 10mm hose to 475 psi with a -40 - 185F rating, almost.

 

[CraigStu]

If you can find the 10mm hose you may be able to double the size of that loop so you can make the connection w/o kinking it. Going fractional. 10mm = .393". 3/8" = .375". So the 3/8 is .018" undersized. I'd use that in a heartbeat. And 7/16" = .437" so it is .044" over sized. I would consider using it but w/ double clamps of a better design. Two clamps next to each other clocked 180 degrees apart. This style;
https://www.dansdiscounttools.com/wp-content/uploads/2017/12/P1010005-588.jpg or this;

https://www.dansdiscounttools.com/wp-content/uploads/2017/12/P1010002-1294.jpg

So that the rubber is protected from the slots in the regular style clamp cutting into it. Remember this is the return line to the reservoir so it is more suction than pressure or at least lower pressure than the pump output hose.

 

[BillK]

The Chinese are making 10mm hose so why it is so hard to find in auto parts store is SMH.

Because realistically very very very few people want to make the fix like you are doing. They just buy the correct replacement hose assembly and go on with life. I know thats what I would do if it was my truck.

 

[RPH]

Circle the hose 360*. Keep the diameter tight enough but no kinking. That way you make the 180* turn without compromising the flow.

 

[Wrench97]

If you can find the 10mm hose you may be able to double the size of that loop so you can make the connection w/o kinking it. Going fractional. 10mm = .393". 3/8" = .375". So the 3/8 is .018" undersized. I'd use that in a heartbeat. And 7/16" = .437" so it is .044" over sized. I would consider using it but w/ double clamps of a better design. Two clamps next to each other clocked 180 degrees apart. This style;
https://www.dansdiscounttools.com/wp-content/uploads/2017/12/P1010005-588.jpg or this;

https://www.dansdiscounttools.com/wp-content/uploads/2017/12/P1010002-1294.jpg

So that the rubber is protected from the slots in the regular style clamp cutting into it. Remember this is the return line to the reservoir so it is more suction than pressure or at least lower pressure than the pump output hose.

I would too, most likely the issue he was told about was because the radius of the bend was too sharp and kinked the hose.

 

[Kuma601]

Because realistically very very very few people want to make the fix like you are doing. They just buy the correct replacement hose assembly and go on with life. I know thats what I would do if it was my truck.

I can accept that so those with the wallet depth this isn't an issue to replace it out. It is a budgetary thing to spend $20-$35 for a hose or buy the whole return line for $135-$200. Toyota is aware of parts aging out yet they piece together various other assemblies to make the owner spend up.

For a while they offered bushings that can be pressed into a caster arm at $40/each. They also offered the complete arm for $250. Most of us bought the bushing as the caster arm does not wear except in rust belt or ocean regions. Not as fast as a R-R deal but that savings was well worth the 5-10 minutes on the press, $80 in parts or $500.

 

[andyvh1959]

That assembly must be a return side of the system. Those hose clamps and that style of hose is for low pressure, like under 100 psi. The ID of common 3/8" hose is 0.375" versus 0.393" for 10mm ID hose. Unless the flow rate is quite high on the return side I do not agree the 5% reduction in hose ID would cause starvation at the pump. But you may not get the right structure 3/8 to fit over the tube bead/barb. If a 7/16" ID hose does not fit the end connection well and allows air to be sucked in then yes it could create steering pump issues.

Any clamp used on an alternate hose must be a constant torque style, like the spring clamps on the hose assembly pictured above. Standard cheap screw drive clamps can loosen over time as the hose takes a set. A spring clamp, or constant torque clamp overcomes hose set, especially whenever a hose is applied over a beaded tube end or barbed connector.

If you select a different hose, make sure it is compatible (long term) with the system fluid and temperature range of the system and the underhood environment. Not all hose inner tubes are compatible with the various system fluids, so don't assume any hose of any pressure rating is suitable. If it is a return side system hose make sure the hose is vacuum rated to match the original hose. That is a molded hose assembly so you'd likely need to add hose length to compensate for the specific routing of that assembly. All said, shop for an aftermarket OEM match hose assembly if you don't want to spend the money on an OEM hose assembly. Lexus certainly does not produce that assembly, they are buying it from some supplier and marking it up for serivce parts.

 

[CraigStu]

I agree w/ you. Factory parts can be an expensive fix. One other thought. Go to a salvage yard and look at anything w/ a trans cooler. Cut out a similar piece of tubing, the metal tubing. If you can find a close bend than all you need is a couple of 2-3" pieces of hose to splice it into you car. BTW, when you say it is 10mm is that the ID or OD of the metal tube.

 

[texasprd]

I went through a somewhat similar situation with my son's '05 Rav4. The PS return hose was leaking where the rubber section bridged between two steel tube sections. I used MasterPro PS0308 (O'Reilly's) to replace the rubber mid-section. It's 3/8" or 9.5MM according to the packaging - it was an easy slip over the two flared steel sections, and there has been no noise from the pump. I don't know if it could make the bend the OP needs.

I think I understand where the OP is coming from - but speaking only for myself, I resent being forced to spend more than necessary to buy/replace things that aren't actually necessary. It's like having to buy a wiper blade "assembly", instead of just the insert - the hanger never wears out, but someone decides to make you buy something unnecessary so they can up their sales.

 

[andyvh1959]

Metal tube is sized by OD and wall thickness. In the fluids conveyance business (water, oil, air, grease are all considered fluids), anything listed as "hose" is sized by the ID. Anything listed as "tube" or tubing is sized by the OD and wall thickness. Hose can be synthetic rubber (neoprene, nitrile, EPDM, etc) but is rarely ever plastic. Tubing can be thermoplastic, steel, copper, stainless, etc but is rarely ever synthetic rubber. Tubing is rarely specified by ID.

 

[CraigStu]

Thanks Andy. I was thinking about soft copper tube which is readily and cheaply available in 3/8. He could make his own 180deg bend w/ it. But then I looked at the ID and it is small. McMaster lists soft copper 3/8 tube ID as .277". So way too small. They have a soft copper in 10mm OD but an 8MM ID. I didn't bother converting the ID because it is only available in a coil for $180.

 

[Kuma601]

Appreciate the replies!

Exactly about the inserts vs. blade or whole arm. The Toyota assembly is quite good and the inserts a favorite. Owners tend to toss that blade assembly for the cheap replacements not realizing how good that Toyota product is. We've had user tests of the Toyota insert vs. others and one has to spend some $ to get good performance. YMMV depending on region. That Toyota wiper assembly is $ too.

The Corolla return line to the reservoir assembly will arrive tomorrow. We'll see how it is.

Thanks for the suggestions!