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mystery coolant leak

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Old Jan 19, 2009 | 11:30 AM
  #1  
CaliChevyLover's Avatar
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From: annapolis MD
Car: 1986 IROC-Z28
mystery coolant leak

just had my oil changed today. overflow box was almost empty so they topped it off. took off the rad cap it was very low...couldnt see anything from eye level.

no milkshake in oil, no coolant in the cabin. all hoses/lines tight. wat should i check!
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Old Jan 19, 2009 | 11:52 AM
  #2  
zipfast's Avatar
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From: PA
Car: 94 9c1 Caprice
Engine: LT1 (3-fity)
Transmission: 4L60E reBUILT
Axle/Gears: 3:08 POSI (out)
Re: mystery coolant leak

Check the under side of the engine, and radiator.
If you don't have a jack and stands, or use of a lift you can
drive up on the sidewalk with just one side of the car.
Use a flashlight to look for coolant, a led light works best.
With all that said if you can't find anything it's probally a intake leak.
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Old Jan 19, 2009 | 11:52 AM
  #3  
1986maro's Avatar
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From: Burwell Nebraska
Car: 86 Camaro Iroc-z
Engine: Lb9 (305 TPI)
Transmission: 700r4w/ 2500 stall shift kit
Axle/Gears: quick performance ford 9 3:70
Re: mystery coolant leak

there is a few places were it could be going. my problem is the heater core. i have a pin hole in it some were and it slowly drips on my passenger side floor pan.it might take a hour to get your carpet or floor mat wet. tell me what you find out
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Old Jan 19, 2009 | 11:54 AM
  #4  
TransAM Joe's Avatar
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From: Lake of the Ozarks, MO
Re: mystery coolant leak

First check to see if your dropping any on the ground, then track down the source. Common places are out of the weep hole on the bottom of the water pump, look for a white crusty trail, or if the pump makes a howling noise, usually associated with leaking to, replace the pump. Another common spot is the plastic side tanks on the radiator, not as easy to find small cracks, usually pressure test required. Also the drain spigot, the oring dries out and cracks letting coolant by. If it's me and I take a radiator out and it's original have the tanks replaced, just good sense.

Other options not so likely, crack in the water jacket on the block. Drain plug/knock sensor on sides of block. I had a car once leaking coolant out the freeze plug and it burned the coolant off before it could drip on the ground, never lost much coolant, but could always smell it, was a real mystery for years till I rebuilt the motor and saw the white crusty build up around the plug.
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Old Jan 19, 2009 | 04:34 PM
  #5  
CaliChevyLover's Avatar
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From: annapolis MD
Car: 1986 IROC-Z28
Re: mystery coolant leak

alright i'll see wat i find. radiator and water pump were both replaced last year.
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Old Jan 19, 2009 | 05:28 PM
  #6  
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From: annapolis MD
Car: 1986 IROC-Z28
Re: mystery coolant leak

security on campus understandbly threw a fit when i put it on the sidewalk so these are the best pics i could take.

http://s168.photobucket.com/albums/u...oolant%20leak/

doesn't really smell like coolant tho..idk.
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Old Jan 23, 2009 | 12:25 AM
  #7  
bertz28's Avatar
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From: San Diego
Car: '91 Z-28 2007 F-250
Engine: 5.7
Transmission: 700R4
Axle/Gears: 4.10
Re: mystery coolant leak

i had the same problem. I kinda ignored it for a while and then I found a pool of coolant on my passenger side floor. It turned out to be my heater core.
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Old Jan 23, 2009 | 08:34 AM
  #8  
CaliChevyLover's Avatar
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From: annapolis MD
Car: 1986 IROC-Z28
Re: mystery coolant leak

ya i found the leak its not the heater core
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Old Jan 23, 2009 | 04:01 PM
  #9  
TREK's Avatar
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From: S.FLORIDA
Car: 1979 vette
Engine: 350
Transmission: th350
Re: mystery coolant leak

'ya i found the leak its not the heater core'

Well are you going to tell us or are you going to keep it to yourself
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Old Jan 23, 2009 | 05:16 PM
  #10  
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From: annapolis MD
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Re: mystery coolant leak

https://www.thirdgen.org/forums/cool...-wtf-name.html
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