Coolant leak '99 Plymouth grand voyager



ChryslerMiniVan.net is the premier Chrysler Minivan Forum on the internet. Registered Users do not see the above ads.
+ Reply to Thread
Results 1 to 7 of 7

Thread: Coolant leak '99 Plymouth grand voyager

  1. #1
    Join Date
    Feb 2013
    Posts
    2
    Country: Users Country Flag
    Thanks
    0
    Thanked 0 Times in 0 Posts


    Coolant leak '99 Plymouth grand voyager

    Sorry if this has been asked and answered here, but I couldn't for the life of me find it....maybe cause I don't know exactly what I'm looking at.

    Anyway, I have a '99 Plymouth grand voyager SE 3.3 with a coolant leak. I replaced the radiator, water pump, and upper and lower hoses last week and the car is still leaking like a sieve. If I pressurize the radiator, the leak seems to be coming from a hose that leads underneath the thermostat housing/water box down into a pipe that (I think) is attached to the timing chain cover. I replaced that hose but the leak still continues. Could there be a small pinhole in that pipe causing the leak? What exactly is that pipe? Do I have to replace the whole timing case?

    Any help would be greatly appreciated. I have no problem doing the work myself, I just don't know what part I actually have to get. Thanks in advance.

  2. Remove Advertisements
    Chrysler Minivan Forums
    Advertisements
     

  3. #2
    Join Date
    Jun 2010
    Posts
    117
    Country: Users Country Flag
    Thanks
    0
    Thanked 15 Times in 14 Posts


    Look at where it is leaking from carefully. That hose does connect to an outlet on the back of the timing cover, behind the water pump. It's possible that either the hose, or the clamps at either end are leaking. It's also possible that the t-stat housing gasket is leaking. It is also possible that the leak may be coming from the timing cover gasket. In that area, there is a coolant passage from the engine into the timing cover. It is sealed by an o-ring that sometimes gives out, causing the coolant to leak. Once the o-ring gives out, the coolant may leak past the gasket and out the back of the timing cover. Does the leak look like it is coming from the top of the timing cover? If it is coming from below, there is another inlet directly behind the water pump that leads to the metal heater return tube. These have a tendency to rust out over time and spring a leak.

  4. #3
    Join Date
    Jun 2011
    Location
    SE Michigan
    Posts
    2,081
    Country: Users Country Flag
    Thanks
    193
    Thanked 506 Times in 388 Posts


    Quote Originally Posted by Mmshmoo View Post
    Sorry if this has been asked and answered here, but I couldn't for the life of me find it....maybe cause I don't know exactly what I'm looking at.

    Anyway, I have a '99 Plymouth grand voyager SE 3.3 with a coolant leak. I replaced the radiator, water pump, and upper and lower hoses last week and the car is still leaking like a sieve. If I pressurize the radiator, the leak seems to be coming from a hose that leads underneath the thermostat housing/water box down into a pipe that (I think) is attached to the timing chain cover. I replaced that hose but the leak still continues. Could there be a small pinhole in that pipe causing the leak? What exactly is that pipe? Do I have to replace the whole timing case?

    Any help would be greatly appreciated. I have no problem doing the work myself, I just don't know what part I actually have to get. Thanks in advance.
    That hose is the bypass hose. It keeps the water circulation in the block when the thermostat is closed and keeps warm water to the thermostat to help it open on time.
    The fitting on the top side of the hose that goes into the intake manifold is rather thick and would take a long time to rust out. The lower fitting (pipe) is thinner and tends to rust out faster. It is pressed into the timing cover so you would have to remove the cover to do anything with it.
    Also the intake manifold gasket is very close to the bypass hose so check to see if it is leaking and spraying out onto the hose.
    If the timing cover seal fails it will look like this.
    Attachment 5618
    2013 TC Limited Black/Graystone Custom ordered 5/13
    Luxury non Stow & Go buckets,Blu ray player,Tow and almost everything else. Driven to 26 states so far. Exclusively our vacation/road trip ride.
    1994 Grand Caravan SE Sport, 3.3L, 335,000+ miles and counting. Original engine and trans. Bought it new and have driven it to 48 states. My daily driver.

  5. The Following User Says Thank You to 1994 Sport For This Useful Post:

    dun4now (02-12-2013)

  6. #4
    Join Date
    Feb 2013
    Posts
    2
    Country: Users Country Flag
    Thanks
    0
    Thanked 0 Times in 0 Posts


    Thanks for the prompt suggestions!

    I've dried up all the wet areas and pressurized the radiator. The leak is definitely coming from the area where the bypass hose goes into the fitting behind the water pump where the timing case is. I'm going to pull everything off tomorrow and replace the hose and the gaskets and see if that works. If not I guess I'll be junkyard scavenging for a timing case cover.

    I'll try and update as I go. Thanks again!

  7. #5
    Join Date
    Jun 2009
    Location
    St. Cloud, MN
    Posts
    1,655
    Country: Users Country Flag
    Thanks
    91
    Thanked 285 Times in 236 Posts


    Did you look closely with a flashlight to see exactly where the leak is coming from? I have heard of the pipe coming from the back of the water pump loosening up and leaking (and sometimes falling out), but it seems more common for the timing cover O-ring/gasket to fail. Looks like if either one is leaking you will have to replace the timing cover anyway (or fix it). New timing covers are cost prohibitive, and difficult to get. I believe one member reattached that pipe with JB Weld and traded/sold the van.

    I had to replace the timing cover gasket/O-ring on our van once, and it is leaking again 20,000 miles later. I used the Fel-pro gasket kit, and that may have been the problem. Next time I am using the OEM gasket and O-ring as it is a different material. Also, you have to drain the oil and remove the oil pan to remove the timing cover, because the oil pump is in the timing cover and the pick-up tube connects to it. It's kind of a big job that takes a whole weekend to do.
    DAN(husband of member STEPHANIE)

    2000 Chrysler Town & Country Limited - Dark Charcoal Metallic with chrome trim, taupe leather interior, loaded. In need of rust repair on rockers and liftgate. Now enjoying the new family mommy-mobile!

    Knowledge can never be wisdom without experience.
    "Your experience is a commodity."
    "Opportunity is not a lengthy visitor."
    DRIVE = LOVE

  8. #6
    Join Date
    Jul 2014
    Posts
    2
    Country: Users Country Flag
    Thanks
    0
    Thanked 0 Times in 0 Posts


    1999 Voyager 3.3 mystery coolant leak

    My problem is similar to the mysterious coolant leak. I drive a 1999 Voyager with the 3.3 engine. I noticed there was a coolant leak that I initially thought was from the lower radiator hose, but once the engine cooled down and I jacked up the passenger side of the car the dripping became obvious. There is a bypass hose that goes between the thermostat housing and the back side of the water pump assembly. It was coming from the lower end of the bypass hose. I thought maybe the hose had sprung a leak so I began loosening it. When the top end was removed from the thermostat housing I jiggled the hose to get a better look at the other end, and much to my surprise the entire hose just slipped out of the block end, complete with the corroded nipple attached to it! When I cut the hose and peeled the nipple out of it, it looked like this...

    Voyager nipple 04621652AC_001.jpg

    A tube of rusted lace. This had to be where the leak was comig from, right?

    The nearby parts store told me I would have to have it welded back in... I was crushed.

    Then came the unholy odyssey of trying to find out what the name of that little doodad was so I could find one. There didn't seem to be any diagrams that showed it as a separate part. Eventually I found a dealership who knew what it was and gave me the part number (itís an AC nipple, part #04621652AC) but didn't stock it. Long story short, another dealer did have it for the completely reasonable price of $12.95! It looks like this...

    Voyager nipple 04621652AC_002.jpg

    A stark difference!

    Now came the time to install it. There is precious little room to work here so I had to be inventive. I solved the problem with an aluminum drinking straw from 7-11. I put the straw into the hole (it won't go too far inside, so don't worry) and slipped the nipple over the straw. Jiggling the straw helped to help seat it. Then I slipped a heavy washer onto the straw that had a hole a little bigger than the straw. It came to rest on the top of the nipple (you see where I'm going). Then a slightly larger pipe was fed over the straw and came to rest on top of the washer. Making sure the orientation of the nipple was just right, I began tapping into the hole. Tap tap, check progress. Repeat process until the nipple is seated almost to the graduated ring on the barrel. Fits like a glove! Remove the tools and replace the hose (5/8" heater hose). Honestly, the hardest part of the process was setting the lower spring clamp in place, but keep at it... it will eventually work out. I had to do that part from underneath the car.

    Please let me know if this helped you at all at agentthirt33n@aol.com.

    Happy motorin'

  9. #7
    Join Date
    Apr 2014
    Location
    World
    Posts
    107
    Country: Users Country Flag
    Thanks
    8
    Thanked 12 Times in 10 Posts


    While I agree with Road Ripper, I feel I want to give you my version. I had a mysterious leak and no one was able to understand from where it was leaking. Not a huge leak but enough to empty the reservoir every month. The leak was so stupid, really stupid and was happening ONLY after I was driving a lot during the day... well, one night me and my friend were checking for a Chrysler MIL 31 (there's a thread here on that) and we noticed that a small hose, on top of the radiator, near the cap was leaking! Not just a drop or two... was a small stream... what was missing? A Clamp! Put the Clamp, now it's a month, going to be two that the reservoir is not emptying anymore! Yey...

    Morale, some times it can be big but some other times... it can be a really small thing that make the difference... For the OP sake and wallet I hope it's a small one.

    Quote Originally Posted by Road Ripper View Post
    Did you look closely with a flashlight to see exactly where the leak is coming from? I have heard of the pipe coming from the back of the water pump loosening up and leaking (and sometimes falling out), but it seems more common for the timing cover O-ring/gasket to fail. Looks like if either one is leaking you will have to replace the timing cover anyway (or fix it). New timing covers are cost prohibitive, and difficult to get. I believe one member reattached that pipe with JB Weld and traded/sold the van.

    I had to replace the timing cover gasket/O-ring on our van once, and it is leaking again 20,000 miles later. I used the Fel-pro gasket kit, and that may have been the problem. Next time I am using the OEM gasket and O-ring as it is a different material. Also, you have to drain the oil and remove the oil pan to remove the timing cover, because the oil pump is in the timing cover and the pick-up tube connects to it. It's kind of a big job that takes a whole weekend to do.
    1997 T&C 3.8l LXi - 165k miles - Pearl White! Amazing!

    Every time I refer to my mechanic, I am talking about a friend, and his fiance own a coffee shop and her coffee is superb! ... have I ever said that I love coffee like my van and viceversa?

    Previously owned:
    --------------------------------------------------------------------------------------------------------------------------------
    Chevrolet Suburban 1999 - Liked it, not like the Blazer but a good car, sold it to move again.
    Chevrolet Blazer 1997 - Loved it, sold it as I was moving to another country.
    Renault Twingo 1998 - Loved it but died the engine for unknown reasons.
    Fiat Panda 1992 - Loved it but like all Fiat, cooling system problems.

+ Reply to Thread

Tags for this Thread

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts