Water Pump Top Hole?
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From: Woodie on 9 Apr 2010 16:33 Got a new (not reman.) water pump for a '96 Intrepid, 3.3L engine, was surprised to see that the replacement part, a Master CP7140, had the water pump weep hole at the top. The OEM part (with an asymmetric mounting flange) has the weep hole at the bottom. First time I've seen this. Is this now common? Might the reason be to avoid paying a royalty on the original patented design?
From: Paul Hovnanian P.E. on 9 Apr 2010 21:19 Woodie wrote: > > Got a new (not reman.) water pump for a '96 Intrepid, 3.3L > engine, was surprised to see that the replacement part, a > Master CP7140, had the water pump weep hole at the top. > The OEM part (with an asymmetric mounting flange) has the > weep hole at the bottom. First time I've seen this. Is this now > common? Might the reason be to avoid paying a royalty on > the original patented design? I've heard that hole referred to as either a weep hole or a hole necessary to allow pressure relief when pressing seals/bearings into the bump casting. A hole in the top would be useless as a weep hole, but would work for the latter reason. -- Paul Hovnanian mailto:Paul(a)Hovnanian.com ------------------------------------------------------------------ Plaese porrf raed befre postng.
From: Woodie on 9 Apr 2010 23:34 "Paul Hovnanian P.E." <Paul(a)Hovnanian.com> wrote in message news:4BBFD222.D4440E8C(a)Hovnanian.com... > Woodie wrote: > > > > Got a new (not reman.) water pump for a '96 Intrepid, 3.3L > > engine, was surprised to see that the replacement part, a > > Master CP7140, had the water pump weep hole at the top. > > The OEM part (with an asymmetric mounting flange) has the > > weep hole at the bottom. First time I've seen this. Is this now > > common? Might the reason be to avoid paying a royalty on > > the original patented design? > > I've heard that hole referred to as either a weep hole or a hole > necessary to allow pressure relief when pressing seals/bearings into the > bump casting. > > A hole in the top would be useless as a weep hole, but would work for > the latter reason. > > -- > Paul Hovnanian mailto:Paul(a)Hovnanian.com > ------------------------------------------------------------------ > Plaese porrf raed befre postng. Despite being on top, I think it could still function as a stopgap safeguard against the introduction of coolant (caused by a leaking seal) into and resulting in a catastrophic failure of a pump shaft bearing, should that even be the purpose of that hole. I did however wrap a piece of tape over the hole, not as any type of seal, but for the sole purpose of preventing the accidental entry of foreign chemical, clogging or abrasive material dropping into the hole. I remain curious as to whether others have observed such a possibly non-standard placement of that hole.
From: dsi1 on 9 Apr 2010 23:35 On 4/9/2010 10:33 AM, Woodie wrote: > Got a new (not reman.) water pump for a '96 Intrepid, 3.3L > engine, was surprised to see that the replacement part, a > Master CP7140, had the water pump weep hole at the top. > The OEM part (with an asymmetric mounting flange) has the > weep hole at the bottom. First time I've seen this. Is this now > common? Might the reason be to avoid paying a royalty on > the original patented design? > > I've never seen that before. Are you sure you don't have your engine mounted upside down? :-) Anyway, it sounds like a good idea to me - you might be able to see if the bearing is leaking. I always have to stick my hand under the bearing housing and feel for coolant. Not having to do this would suit me fine. Hopefully, nobody's paying any royalties on a weep hole. :-)
From: Woodie on 9 Apr 2010 23:43
"dsi1" <dsi1(a)humuhumunukunukuapua'a.org> wrote in message news:_lSvn.37327$u62.37088(a)newsfe10.iad... > On 4/9/2010 10:33 AM, Woodie wrote: > > Got a new (not reman.) water pump for a '96 Intrepid, 3.3L > > engine, was surprised to see that the replacement part, a > > Master CP7140, had the water pump weep hole at the top. > > The OEM part (with an asymmetric mounting flange) has the > > weep hole at the bottom. First time I've seen this. Is this now > > common? Might the reason be to avoid paying a royalty on > > the original patented design? > > > > > > I've never seen that before. Are you sure you don't have your engine > mounted upside down? :-) Good one. > Anyway, it sounds like a good idea to me - you might be able to see if > the bearing is leaking. I think you mean seal. > I always have to stick my hand under the bearing > housing and feel for coolant. Not having to do this would suit me fine. Good point. > Hopefully, nobody's paying any royalties on a weep hole. :-) I was thinking any deviation from the overall design might suffice. |