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Thread: coolant leak might be solved

  1. #1
    Join Date
    Oct 2006
    Location
    NEPA
    Posts
    936

    Default coolant leak might be solved

    just took the car out for a 20 minute drive and while backing up to fix my spot i saw drips. shut the car off and saw drips. I then pipped the hood and looked around and noticed coolant on the lower raciator hose. Hmm. started queezing the hose and heard a clicking noise. then moved my hand to where the thermostat housing is and felt wetness there. Would that clicking be my thermostat housing moving because it has a crack in it? The car is going back into the shop monday for a coolant leak. The guy said it was a lose hose clamp, I think its my thermostat hosuing. Also I noticed the lower radiator hose wasnt hot compared to the upper one. Is this because the lower hose comes out of the raditor and has cool water in it?

  2. #2
    Join Date
    Apr 2006
    Location
    Chicago, Il. U.S.A.
    Posts
    4,243

    Default

    The lower hose should also be hot at op temp.
    "The gas pedal wouldn't go to the floor if it weren't meant to be there"

  3. #3
    Join Date
    Oct 2006
    Location
    NEPA
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    936

    Default

    strange.temp needle reads normal and i get good heat.

  4. #4
    Join Date
    Jan 2004
    Location
    Thunder Bay, Ontario
    Posts
    2,538

    Default

    Lower rad hose should be noticably cooler than the top. Warm, but not hot.

    10/90 Build 525im, 630,000+km, Eibach/Sachs, Engine Rebuild
    *RIP Oskar the DOG *

  5. #5
    Join Date
    Oct 2006
    Location
    NEPA
    Posts
    936

    Default

    thats hot it was. if my thermostat was hung open the car would never warm up and it does and the needle stays right in the middle. im going to tighten that hose clamp and see what happens. but im still suspecting thermostat housing has gone kaput.

  6. #6
    Join Date
    Jul 2006
    Location
    Minnesota
    Posts
    77

    Default FYI - On chasing leaks.

    I just solved a leak this week on my e34. I was absolutely sure it was coming from the area of the #1 cylinder intake, possibly the head gasket. This week with the very cold weather the leak worsened and I was able to see that it was coming from the upper hose connection on the Radiator! Turns out the fluid was running down the underside of the hose towards the head, then it would hit that "T" right by the intake manifold, then would drip down on to the intake manfold and ride the seam over to the bolts on the #1 intake, then run down the side of the block. (Making it look like it was coming from the head gasket area.) Breathing easier now.

    Good luck,
    Jeff in MN
    87 535is 245k Recent top end re-work
    88 528e 290k
    90 535i 115k
    98 740i 115k New Magnaflow Cats, No More Codes

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