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3.0 Coolant bypass hose rear intake

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Old Sep 29, 2005 | 04:19 PM
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From: Binghamton, NY
Exclamation 3.0 Coolant bypass hose rear intake

Anyone ever have the little 1/4" u-shaped coolant hose go bad in the back of the intake? Well I couldn't find it anywhere aftermarket for a direct application and I didnt want to go to the dealer and have to wait for it. So I went to Advance Auto Parts and matched one up myself. The hose I used you had to cut it down a little. The part number was: A71359 Dayco hose. Just thought this may help some of you in a bind!

James
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Old Oct 30, 2011 | 03:59 PM
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Thanks for the house number big help JamesD
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Old Oct 30, 2011 | 04:43 PM
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Originally Posted by buel09
Thanks for the house number big help JamesD
It took 6 years for a reply!!! Amazing! This little intake hose gets dry rotted and cracks causing leaks. I will find a picture so people know what I'm talking about. I'm glad I helped you.

James
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Old Oct 30, 2011 | 04:49 PM
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http://www.accessdayco.com/Additiona...spx?Part=71359

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Old Sep 17, 2013 | 09:09 AM
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Please don't hate me for reviving this thread guys, I just want to say I appreciate all the information on the forum. I just bought a 3.0 1991 4Runner, and I'm feeling pretty crappy about the condition right now. This is one of the problems, leaking weird little hose. I'll get around to this, after I install a new starter.
Looking forward to being a part of this community.
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Old Sep 17, 2013 | 09:27 AM
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Can anyone tell me if I am missing something here, why does it not show on the parts diagram? (the u-shaped hose in questions)
https://www.trdpartscenter.com/parts...iagram=8409070
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Old Sep 17, 2013 | 10:04 AM
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I replaced that hose a couple of years ago on my 95 4runner. The parts guy at toyota couldn't find it either. Just so happened a mechanic walked by and knew what I was talking about. It is listed in a different section. I can't remember which one.
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Old Sep 17, 2013 | 10:07 AM
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If it crosses your mind, please let me know
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Old Sep 17, 2013 | 10:10 AM
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I'll check and see if I still have my receipt with part number when I get home. I'm thinking it was on the screen with the intake manifold if I'm not mistaken.
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Old Sep 17, 2013 | 10:52 AM
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Just to make sure. This is the part we are all talking about....
(See attached)
Attached Thumbnails 3.0 Coolant bypass hose rear intake-3zve-engine.jpg  
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Old Sep 17, 2013 | 11:12 AM
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The coolant bypass hose (which started this thread) can be found:
http://www.toyotapartsoverstock.com/...rimLevel=18380

https://www.trdpartscenter.com/parts.../SR5/index.cfm

Gevo's picture is a different hose; could it be part of the oil cooler? Hard to tell with all that dirt! http://www.toyotapartsoverstock.com/...rimLevel=18380
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Old Sep 17, 2013 | 11:28 AM
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Yep. That's not the bypass hose I thought up were talking about. Sorry, can't help on that one.

Last edited by tommyt; Sep 17, 2013 at 11:31 AM.
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Old Sep 17, 2013 | 11:29 AM
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Scope 103, I believe you may correct. If I remember correctly it was connected to that "Cooler Assy, Oil " gizmo. I will double check when I get home. It had a pin hole leak spraying coolant on to the exhaust pipe and steaming.

I'm generally pretty good with cars, but I don't have experience with oil coolers. The hose in question, although for the oil cooler, would still be carrying coolant and not oil, correct?
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Old Sep 17, 2013 | 11:29 AM
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That's not the bypass hose I thought you were talking about. Sorry cant help on that one.
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Old Sep 17, 2013 | 11:36 AM
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The one in the pic is the oil cooler coolant hose, I think the one we are talking about is between the firewall and intake plenum, little upside down U going from coolant bypass to the little coolant manifold block back there.

Pain in the ass to get to, unless you move the plenum out of the way.
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Old Sep 17, 2013 | 12:13 PM
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OK, great, thanks for the confirmation. After seeing the oil coolant assembly I was pretty sure that's my hose.

Step 1, check. Step 2, find replacement
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Old Sep 17, 2013 | 12:24 PM
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Originally Posted by Gevo
... Step 2, find replacement
I gave you a link to one online source; $10.40 if I'm picking the correct hose.

Your time and gas are worth something.
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Old Sep 17, 2013 | 12:36 PM
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Originally Posted by scope103
I gave you a link to one online source; $10.40 if I'm picking the correct hose.

Your time and gas are worth something.
Of course, and I am great ful for your find! I am hoping to find it at an auto parts store nearby, I need to address this problem tonight so I can get it out of my apartment's parking lot and over to my parents house where all my tools are for the multiple items of maintenance and improvement.

But, I think I will be able to make the 21 mile trip with the small pinhole leak anyway. So, I'll order online if I don't find it for comparable price tonight.

I'm going to attempt to change the starter tonight....
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Old Sep 19, 2013 | 06:08 AM
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So, I fixed it... For now. I had to get the 4Runner from my house to my parents, where I have a garage I can work in (all my tools and stuff too)

I barely made it to a nearby pepboys, had to stop a few times in 3 miles to add water since it was leaking very badly (so much for pinhole leak). Of course I knew pepboys didn't have this hose, I thought I'd for sure be able to mickey mouse something to last me a few more miles. Here it is after I removed the old hose. The little bushing fastened to the block needs to change too.

https://lh6.googleusercontent.com/-r...918_115926.jpg

This is my fix. Took me an hour to tighten the hose clamps! (this is before I tightened them)

https://lh4.googleusercontent.com/--...918_121941.jpg

https://lh5.googleusercontent.com/-c...918_121949.jpg

At the end, the fix felt very good and the regular hose seems like it will hold with the metal guide keeping it in somewhat of a round-like shape. I may keep this for a while, mostly because I do not want to undue those hose clamps. lol.
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Old Sep 19, 2013 | 09:39 AM
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https://www.yotatech.com/forums/f116/3vze-coolant-hose-help-269090/ -- Everything you want to know is there.

Oil cooler is in a separate parts section as are the heating hoses.

And yes, that hose is a bitch. I was able to get the factory squeeze clamp on the upper, but for the lower I had to use a screwed on hose clamp. That upper post is removable and replaceable I think. For non oil cooled engines it's a plug I think...

Last edited by RSR; Sep 19, 2013 at 09:43 AM.
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