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moviebuff
New User
Nov 14, 2007, 7:44 AM
Post #1 of 11
(3875 views)
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Coolant leaking from weep hole in water pump good or bad?
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way2old
Veteran
/ Moderator
Nov 14, 2007, 8:22 AM
Post #2 of 11
(3869 views)
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Bad. You will need water pump
Being way2old is why I need help from younger minds
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Nov 14, 2007, 8:22 AM
Post #3 of 11
(3869 views)
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That's a vent and no coolant should be seen there. New water pump indicated,
T
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Nov 14, 2007, 8:28 AM
Post #4 of 11
(3866 views)
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Ooooh! Look at that ------------ Lightning strikes twice at the same minute!
T
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Guest
Anonymous Poster
Nov 14, 2007, 5:29 PM
Post #5 of 11
(3861 views)
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Oh really, well I have a letter from an engineer at Perkins that says otherwise. I thought it was a joke at first but they are taking it very serious. Maybe because it's a diesel engine? I don't think so. I was a mechanic years ago and I thought I was right about this no coolant out the weep hole.
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Nov 15, 2007, 4:01 AM
Post #6 of 11
(3854 views)
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Just common sense here: If that hole is supposed to leak coolant than you would have a constant puddle under a vehicle - right? It's a vent for the air gap area between bearings for the water pump's shaft. This is not rocket science,
T
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Guest
Anonymous Poster
sept65blake@yahoo.com
Nov 15, 2007, 5:18 PM
Post #7 of 11
(3850 views)
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Okay I'll go a little deeper so you know what I'm talking about. This is four cylinder with a generator. It runs at a constant speed. Here is the weird part. I received five, two had leaks at the weep hole one stopped leaking? I don't get it why would would it stop? I sent the other back for new a water pump.
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Nov 16, 2007, 12:31 AM
Post #8 of 11
(3848 views)
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Ok: Just in general a water pump for a liquid cooled engine has a casting and the shaft that spins an impeller. There is a pressure seal on the "water" side and then should be a sealed bearing, then a gap where shaft runs to an outer bearing and seal for dust/dirt then a nose for a pulley. The area in the middle is not to hold pressure and is vented sometimes top and bottom thru a weep hole.
I'm not sure of the application exactly that you are working with here but there are pumps and things that are lubricated by a metered leak like the driveshaft for yachts and ships, certain other pumps that require being wet to stay cool and not burn up rubber impellers like water impellers that deliver raw water to engines, generators, A/C heat exchangers etc., in marine use mostly as there better be an unlimited amount of water to waste or you are not floating!
If this is a pressurized cooling system that would use anti-freeze this thing should not leak there! I'm not sure I know what you are dealing with here??
T
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moviebuff
New User
Nov 19, 2007, 6:36 AM
Post #9 of 11
(3840 views)
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This is a work thing and I don't want to get into trouble. They want these things to be good so they can meet their production schedule. But here is what I'm working with. It's a Perkins four cylinder diesil engine that has a direct generator attached where the trannie would normaly be. It's inclosed for the elements. It runs a heating/cooling unit once mounted.
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Nov 19, 2007, 8:30 AM
Post #10 of 11
(3838 views)
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Ok: I'm deferring to the priciples here. If this engine has a cooling system that uses a radiator that is filled with coolant not just an unlimited source of raw water then the pump should not leak - period. I've just happened to spend a lot of time on my head in the bilges of boat up to some pretty impressive yachts with assortments of engines for generators which all had separate cooling systems for the engine and would use raw water in a bullet like thing called a heat exchanger that had a pump constantly running raw (sea) water over what is really the radiator. The impellers for those raw water pumps needed to stay wet and were rubber wheels. The engines used stainless or brass parts for impeller wheels for the engine itself and some used raw water in the engine which was constantly discharged out the exhaust on purpose so it stayed cool and didn't get so hot as to blow up the vessel in that bilge area with fuel, batteries, holding tanks etc.
I maintain that the engine's water pump should NOT leak out the weep hole and will eventually destroy the bearing if it does,
T
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moviebuff
New User
Nov 19, 2007, 12:22 PM
Post #11 of 11
(3831 views)
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Thank You! Tom you are the best!
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