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#1
11-23-2003, 11:15 AM
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Coolant Leak From?
A while ago I read a very good posting about the same thing, but cannot find it, and I am a little pressured for time.
I CANNOT located the darn source, I am assuming is the water pump. Have been using my trusty dentist's mirror to no avail. See pictures. 
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1999 Porsche 996 Carrera Convertible 1994 420E - SOLD 1986 300E - SOLD, what a car 609 Certified Last edited by pesuazo; 11-23-2003 at 12:34 PM. 
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#2
11-23-2003, 11:23 AM
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Oh well, I give up on trying to post pictures
For some reason cannot upload them
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1999 Porsche 996 Carrera Convertible 1994 420E - SOLD 1986 300E - SOLD, what a car 609 Certified
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#3
11-23-2003, 02:37 PM
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99% sure it's the water pump. It leaks from the shaft seal behind the pulley, leaks down to the lowest part of the water pump, along the ridge along the oil pan flange and down to ground near the left motor mount.
Sixto 95 S420 91 300SE 87 300SDL 83 300SD
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#4
11-23-2003, 03:20 PM
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Yes it weep for awhile and then fail. I just had mine replaced on my 84 300D after weeping for 4 months. I was eventually adding a gallon of water a week. I wanted to get it fixed before the winter.
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85 300CD Signal Red/Tan sold 83 300D Manganese Brown 109K 97 E420 Midnight Blue 197K sold 98 BMW 328i Vert White 100K, sold 95 BMW 525i White 125K, sold 93 BMW 525iT Red 193K, sold 95 E320 Green Wagon 125K, sold 94 E320 White 127K, sold 85 300SD 156K Grey (Annie), sold 84 300D Lapis Blue 170K (Judy), sold 99 ML 320 Black (lease), 1998 C230 White (lease) 00 Honda S2000 Red (lease) 86 Mercedes 300E (sold) 84 Porsche 911 Red (sold), 1965 Porsche 911 White (sold)
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#5
11-24-2003, 09:55 AM
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Yep, leak dripping by the oil drain plug, can see it coming down by the oil sensor too. I am trying really hard to locate it behind the pump.
It is funny, I drive the car for a while, and the leak stops. Let it sit overnight, and starts leaking. Heat expansion playing tricks with my head.
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1999 Porsche 996 Carrera Convertible 1994 420E - SOLD 1986 300E - SOLD, what a car 609 Certified
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#6
11-24-2003, 01:38 PM
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I had the same problem a few weeks ago. I thought at first it was the water pump, but i saw no dried residue from the pump weep hole. Then I followed the dried streak up to the thermostat housing area. And i found a few droplets on the lowest part of the housing. I tried to reseal but it continued to leak. I then replaced it with a spare i luckily had from my old engine. Then it stopped. I had the same symptoms, in that i could drive the car and there was no leaks. Then let it sit for a while. I would go out at lunch time from work and take a look, and i could see the leak beginning. Then it would stop after it leaked a certain amt. I suspect it had something to do with when the thermostat would release while the engine was cooling and it must have created some pressure and released it out the weakest point in the system.
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1988 190e 2.3 with 91 engine
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