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Re: [GMCnet] Do our engine water pumps die from age, or miles ? [message #329454 is a reply to message #329443]

Fri, 23 February 2018 23:23

jimk

Messages: 6734
Registered: July 2006
Location: Belmont, CA

Karma:

Senior Member

Fuel pump must replaced if not in last 5 years.
Reason is the Ethanol is eating the rubber diaphram that is already old.
I have seen the ruptured fuel pump take out engines.
I requested to my techs to replace all the rubber in the fuel system, they
left the old pump and it went and filled the crankcase with fuel and ruind
a good engine.

On Fri, Feb 23, 2018 at 12:09 PM, Matt Colie wrote:

> BobDunahugh wrote on Fri, 23 February 2018 01:03
>> My radiator is out. So it's simple to change the water pump. PO rebuilt
> the 403 in 1994. Put 1880 miles on it in 1995. Then this 78 Royale was
>> parked outside from Oct of 1995 to Oct of 2015. Now we've put 12,000
> miles on it. The radiator is a mess inside. I'm changing that. So what
>> condition is the water pump in? Bob Dunahugh 78 Royale
>
> Bob,
>
> To answer your question as best it can be answered.
> Jacket water pumps in passcar (as close to the coach as I know) die of
> either:
> A - Seal failure
> B - Bearing failure
>
> Seal failures used to be common before the Stellite/Ceramic mechanical
> seals. These are lubricated by the coolant, and come very close to not
> wearing
> at all, but they do this with a very little, but almost continues leak
> when running. If you look "under the chin" of any new water pump, you will
> see
> a small feature that has a plug in it with a tiny hole. That is a
> "Warranty Avoider". The drips from the seal go in there instead of into the
> bearing (pumps have always had the feature to leak coolant and not have it
> end up in the bearing), and there is often some packing in the space to
> help the trapped coolant evaporate before an owner sees it and complains.
>
> Bearing failures used to be common before synthetic grease. Normal grease
> has a limited life and this is way we used to repack wheel bearings all the
> time. When the grease did age out, the bearing was soon toast. That was
> not uncommon at 15~20 years, but it could easily happen sooner. How long is
> a synthetic grease good? I don't know. I have things here that I
> repacked with a synthetic two houses ago.
>
> So, is it a good thing to change out on general principle?
> As said above, it is kind of a slongaz thing.
>
> Matt
> --
> Matt & Mary Colie - '73 Glacier 23 - Members GMCMI, GMCGL, GMCES
> Electronically Controlled Quiet Engine Cooling Fan
> OE Rear Drum Brakes with Applied Control Arms
> SE Michigan - Twixt A2 and Detroit
>
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--
Jim Kanomata
Applied/GMC, Newark,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
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Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502

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[Message index]

		[GMCnet] Do our engine water pumps die from age, or miles ? By: BobDunahugh on Fri, 23 February 2018 00:03
		Re: [GMCnet] Do our engine water pumps die from age, or miles ? By: James Hupy on Fri, 23 February 2018 00:14
		Re: [GMCnet] Do our engine water pumps die from age, or miles ? By: Ken Burton on Fri, 23 February 2018 04:42
		Re: [GMCnet] Do our engine water pumps die from age, or miles ? By: Dave Stragand on Fri, 23 February 2018 08:09
		Re: [GMCnet] Do our engine water pumps die from age, or miles ? By: jhbridges on Fri, 23 February 2018 08:34
		Re: [GMCnet] Do our engine water pumps die from age, or miles ? By: Matt Colie on Fri, 23 February 2018 14:09
		Re: [GMCnet] Do our engine water pumps die from age, or miles ? By: jimk on Fri, 23 February 2018 23:23
		Re: [GMCnet] Do our engine water pumps die from age, or miles ? By: GMC.LES on Sat, 24 February 2018 09:37
		Re: [GMCnet] Do our engine water pumps die from age, or miles ? By: James Hupy on Sat, 24 February 2018 09:43
		Re: [GMCnet] Do our engine water pumps die from age, or miles ? By: GMC.LES on Sat, 24 February 2018 09:50
		Re: [GMCnet] Do our engine water pumps die from age, or miles ? By: GMC.LES on Sat, 24 February 2018 09:49

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