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#1
11-04-2008, 03:22 PM
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Leaking radiator.
I changed the radiator on my car due to a leaking trans cooler causing the trans fluid to be full of water.
The used radiator that I put in leaves a nice spot under the car, and I can not find where it is coming from. Is it worth trying stop leak? Or what other options? I do not have $200+ for a new radiator. Thanks Doug
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83 300SD Dark Silver Dark brown inside 
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#2
11-04-2008, 04:05 PM
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How big is the spot?
Stop leak tends to plug up everything, including the heatercore and mono valve. You could get another used one, but this time have it pressure tested.
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RRGrassi 70's Southern Pacific #5608 Fairmont A-4 MOW car 13 VW JSW 2.0 TDI 193K, Tuned with DPF and EGR Delete. 91 W124 300D Turbo replaced, Pressure W/G actuator installed. 210K 90 Dodge D250 5.9 Cummins/5 speed. 400K
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#3
11-04-2008, 04:55 PM
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the spot is about 6inches. Also noticed that the that I can squeeze the top hose when hot, meaning very little pressure, and when cold I do not hear coolant in the hose. So the coolant in the tank in not filling the radiator back up.
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83 300SD Dark Silver Dark brown inside
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#5
11-05-2008, 10:46 AM
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Are you sure the radiator is leaking? Have you checked the water pump or the possibility of a loose hose connection or cracked hose?
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RRGrassi 70's Southern Pacific #5608 Fairmont A-4 MOW car 13 VW JSW 2.0 TDI 193K, Tuned with DPF and EGR Delete. 91 W124 300D Turbo replaced, Pressure W/G actuator installed. 210K 90 Dodge D250 5.9 Cummins/5 speed. 400K
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#6
11-05-2008, 11:00 AM
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I had a small leak like that – turned out to be the little "jumper" hose between the water pump and the thermostat (I'm not awake yet and probably not making sense, hope you know what hose I mean). Anyway, my mechanic changed the hose and the leak stopped.
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 "Buster" in the '95 Our all-Diesel family 1996 E300D (W210) . .338,000 miles Wife's car 2005 E320 CDI . . 113,000 miles My car Santa Rosa population 176,762 (2022) Total. . . . . . . . . . . . 627,762 "Oh lord won't you buy me a Mercedes Benz." -- Janis Joplin, October 1, 1970
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#7
11-05-2008, 09:55 PM
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that little hose is the bypass hose. Most people forget that hose exsists till like you,, you suffer a leak lol.
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#8
11-06-2008, 09:32 AM
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Checked the hoses, They are dry, also changed the drain plug.
Rad. is wet along the bottom, and only after it cools some. If I check it when hot, I can not find anything.
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83 300SD Dark Silver Dark brown inside
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