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Thread: The hose of death thread

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    The hose of death thread

    My "hose of death" or "hose from hell" wasn't leaking yet, but I decided to go ahead and replace it while I had the intake and exhaust manifold off my van. Since I had everything on the left side of the engine removed, I figured I could do the job without cutting an access hole, but even then it was a bit hard to access. It looked manageable if I were to take the valve cover off, but I decided to bite the bullet and just cut the hole already. I mapped it out to fit the bend in my brake vacuum line that hugs the firewall there (I didn't want to move it nor did I want to damage it). The hole came out nice and it gave me plenty of access. I actually ordered the replacement hose from Toyota (Toyota Part # 15261-73030) but compared to Gates #28408 5/16" ID heater hose, it looked wimpy . I decided to use the Gates hose. Surprisingly enough, the old hose wasn't leaking and actually was in pretty good shape. Taking into consideration it was 20 years old, I decided replacement was best. Here are some pics of the project.

    1st step is getting the carpet and heater duct out of the way.



    Next I laid out hole location and marked it with a sharpie. Ideally, I would have liked the hole to be another couple inches higher and to the left, but there's a steel vacuum line for the brake booster that is mounted there. Rather than mess with that, I compromised and decided here was the best.



    Here is a Matco Air Saw. This thing is like a saws-all, but offers much better control for projects like this.



    Here is the view through my newly cut access hole.



    Here is how it looks from the engine side (note the steel vacuum line with the 90 deg bend).



    Ample access for changing hose has now been granted. The upper end was a little more challenging, but still not bad. I used a 1/4" drive ratchet with a 1/4" socket to tighten the upper clamp. It was very manageable.



    I used some .050 painted aluminum plate I had laying around and some 3/16" aluminum pop rivets to make provisions for re-installing the piece I cut.



    I used some double back tape to stick the piece of insulation back on.



    I used some 1/2" #6 self tapping sheet metal screws to secure the new access panel into place.



    Okay, so you think that's the end of the tough little hoses to change? well guess what? There's another hose of death

    The next hardest hose to conquer is another 8mm (5/16") hose that goes from the 19mm (3/4") steel heater hose return pipe up to an 8mm (5/16") pipe that attaches to the intake manifold. Although this one can also be a pain, it is not nearly as tough as the one I cut the access hole for. It can be done from underneath without too much trouble (at least on a 2wd, not sure about the 4wd). Here are some pics of it's location for your viewing pleasure . Tim









    Fully assembled view from under van:



    Gates hose is available by the foot at most auto parts stores. My local Napa usually carries it, but was out, so I went to Carquest and got some there.

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    Re: The hose of death thread

    Great thread! It sure helped me out...

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    Re: The hose of death thread

    I did another one of these last weekend. Pics are pretty self explanatory. Enjoy


















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    Re: The hose of death thread

    Ah the love hate issue on cutting the walls ...


    I think I'll try to convince my woman to use her tiny hands to help me out, har har har.

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    Re: The hose of death thread

    It can be done without cutting. When the valve cover is off it opens it up enough, but it's hard to see and easier to make a mistake. With the access hole it can be done easily and the metal pipe/nipple can be inspected. I consider the cut wall a non-issue as it's covered with a heat duct and carpet (no one will ever see it except maybe a mechanic). Tim

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    Re: The hose of death thread

    Yeah I would probably probably fab out a nice latch and hinge so no screws necessary.


    Is the valve cover just a rubber gasket, if so sometimes I wouldn't mind taking the cover off to get at a hoke easier. (As long as you over it from debris )

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    Re: The hose of death thread

    The valve cover gasket is the rubber type that sits in a notch. As far as valve covers go, on the van it's somewhat of a PITA to remove (other junk in the way) but manageable. Changing the VC gasket is actually one of the things I'm doing on this van, but even so I still would rather have the access hole there. Hinge and latch would be nice I guess, but since that hose will last about 20 years I find the time and effort for that hard to justify. It doesn't take very long to remove 4 screws. Tim

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    Re: The hose of death thread

    Very true, have you ever thought of reinforcing the area you have cut before ?

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    Re: The hose of death thread

    I briefly considered it but due to design I couldn't see how a hole here (of this size) could have much effect on structural integrity.

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    Re: The hose of death thread

    I recently replaced a valve cover gasket on one of my rigs. It definitely took longer than expected. If you go that route plan on replacing the (3) valve cover grommets and possibly the PCV grommet as well. I found them all to be brittle, sections broken off, etc.

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    Re: The hose of death thread

    Very true ...

    Looks solid and it won't make any more noise.

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    Re: The hose of death thread

    I just replaced the hose of death... Can anyone explain to me what part of the cooling system the HofD is responsible for? I noted its path of travel obviously starts in the rear of the engine block and makes its way through a metal line which then converges into a bypass hose that travels through the TB, then towards the underneath of the upper intake manifold, through a sensor, then it drops into a larger hose which travels near the radiator.

    Anyway most of the rubber hoses in this circuit had gunk in them.... I looked at the manual and it is not under cooling. I will do a coolant flush and I would like to know if this will clean it up, or if I should do something further. Thanks

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    Re: The hose of death thread

    As you stated the hose of death taps coolant off the bypass plate on the back of the head. It then goes to the throttle body via a metal tube & another rubber hose at the throttle body. It's purpose at the throttle body is to warm it & prevent icing during freezing conditions. Next it passes to the air valve (mounted to the underside of the top half of the intake manifold). The air valve's function is to increase idle speed when the engine is cold. It uses coolant temp to activate/deactivate. Next it's routed to the heater hose return line (part of the metal tube that travels the length of the block on the driver's side). There is an 8mm nipple welded to that tube near the back of the engine & this is where it ends up.

    These little tubes can get crusty inside. Some get so bad they become completely blocked. The last engine I reworked was so bad I couldn't re-use the throttle body (nipples were like Swiss cheese). I was able to re-use the air valve, but I had to clean it using drill bits & compressed air. If you live in a place that's warm year round you don't need this stuff. You could bypass it or simply plug it off at each end. Tim

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    Re: The hose of death thread

    Thanks Tim... Where I live freezing weather is no concern.

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    Re: The hose of death thread

    This is the second time I have replaced the "hose of death" since I bought my 1984 Toyota Van new.
    I was going to cut an access hole as described above until I remembered that I had placed the two clamps in a position so that I could reach
    them from underneath the vehicle with a long 1/4 inch extension. They came right off.

    The hose was hardened, so it broke apart pretty easily thus being pretty easy to remove. I had removed the EGR valve in order to get better access
    from the driver's side.

    I thought about getting the Gates hose that Tim mentioned above, but instead decided to get Silicone Heater Hose which has
    a temperature range of -65 F to 350 F. I bought VMS 5/16 inch silicone heater hose. Part Number VMSHSE1P-031-BLK
    Nice and pliable and easy to clamp.
    http://www.verociousmotorsports.com/...ld-by-the-Foot

    I attached the hose with the clamp on it from the driver's side first, rotated the clamp so I could reach it from underneath. Then I
    tightened it on that side with the 1/4 inch extension and socket from underneath. I then went over to the passenger side and bent the hose
    with the clamp on it so that I could slip it over the passenger side nipple behind the valve cover and then rotated the clamp so that I could tighten it from underneath and it was done.

    John

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    Re: The hose of death thread

    Quote Originally Posted by timsrv View Post
    Fully assembled view from under van:



    Gates hose is available by the foot at most auto parts stores. My local Napa usually carries it, but was out, so I went to Carquest and got some there.


    Hello All,

    This morning as I was parking my van at work I could smell evaporating coolant. I looked under the van and it was spraying coolant all over the parking lot..


    A first I thought the head gasket blew, but on closer inspection it looked like it was spraying out of the side of a hose. (Please see the number marked 1 on image. Hope you don't mind me using that image). I think the metal pipe next to it melted through the coolant hose.

    Name:  Coolant Hose.jpg
Views: 1507
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    What size hose should I use to replace it? Also I notice that clamps are used, should I do this as well?


    Also, while under there I notice the bolt that attaches to the intake manifold missing (2).

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    Re: The hose of death thread

    Well this is not specifically the hose of death, but related i guess.

    It was as I suspected. The hose was melted by the EGR metal tube. Melted right through it. I was able to pick up some 5/8 heater hose rated for +350' F / 60 PSI and two new clamps at NAPA. Removed and installed all during lunch hour.

    Hopefully that solves the problem.
    Last edited by Ian R.; 06-15-2015 at 03:18 PM.

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    Re: The hose of death thread

    That should solve it. These hoses get fragile when they get old. If the EGR is getting hotter than it should, that's a sign of a failing cat converter or the timing being off. It could also be a problem with your electronic advance............or could simply be a poorly routed hose. Just thought I'd throw some other possibilities out there as food for thought. Tim

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    Re: The hose of death thread

    Thanks Tim!

    -I have got to hand it to you. You are always one step ahead of things. Getting the timing checked is on the list. My initial thought was, it was to close to the EGR. But as I replacing the hose, I started thinking. Why? Is the EGR suppose to be running that hot?

    Thank you again for your help and TV wisdom!

    -Ian

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    Re: The hose of death thread

    Must just be that time of year lol, im about to cut an access panel myself. I am going to lay some sheets of leather i have all around the hump, and use my air cutoff tool to cut the size hole i need. I was looking at nice hole saws but 80 bucks for the 8 inch is just not happening.

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