| Coolant flow diagram in GMCMI Winter 2020 backwards? [message #353726] |
Sun, 12 April 2020 09:27  |
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RF_Burns
Messages: 2277
Registered: June 2008
Location: S. Ontario, Canada
Karma: 3
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So.. full disclosure, I am only a farmboy mechanic so I'm no expert in anything... but isn't the coolant flow in the Winter 2020 edition of GMCMI magazine Tech Corner, flowing backwards?
Should not the hot coolant flow out of the top of the engine through the opened thermostat to the top of the rad??? And the cool coolant flow from the bottom of the rad into the bottom of the engine?
If the diagram is right... as soon as the coolant in the engine gets hot enough to open the thermostat, cold coolant would then flow through the thermostat and immediately close it... leaving hot coolant in the rest of the engine.
I did not go look up other diagrams, so maybe I am dead wrong here... but if so it challenges my farmboy engineering skills.
The image is credited to Encyclopedia Britannica Getty Images so I am assuming this diagram has been checked over by those in the know...
Or maybe is this like electron current flow vs conventional (hole) flow??
Bruce Hislop
ON Canada
77PB, 455 Dick P. rebuilt, DynamicEFI EBL EFI & ESC.
1 ton front end
http://www.gmcmhphotos.com/photos/showphoto.php?photo=29001
My Staff says I never listen to them, or something like that
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| Re: Coolant flow diagram in GMCMI Winter 2020 backwards? [message #353727 is a reply to message #353726] |
Sun, 12 April 2020 09:34  |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
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Well, on mine it flows out of the thermostat housing into the upper radiator inlet, then out of the bottom radiator outlet to the water pump for distribution.
--johnny
Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
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| Re: Coolant flow diagram in GMCMI Winter 2020 backwards? [message #353729 is a reply to message #353726] |
Sun, 12 April 2020 09:58 |
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Matt Colie
Messages: 8547
Registered: March 2007
Location: S.E. Michigan
Karma: 7
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RF_Burns wrote on Sun, 12 April 2020 10:27So.. full disclosure, I am only a farmboy mechanic so I'm no expert in anything... but isn't the coolant flow in the Winter 2020 edition of GMCMI magazine Tech Corner, flowing backwards?
Should not the hot coolant flow out of the top of the engine through the opened thermostat to the top of the rad??? And the cool coolant flow from the bottom of the rad into the bottom of the engine?
If the diagram is right... as soon as the coolant in the engine gets hot enough to open the thermostat, cold coolant would then flow through the thermostat and immediately close it... leaving hot coolant in the rest of the engine.
I did not go look up other diagrams, so maybe I am dead wrong here... but if so it challenges my farmboy engineering skills.
The image is credited to Encyclopedia Britannica Getty Images so I am assuming this diagram has been checked over by those in the know...
Or maybe is this like electron current flow vs conventional (hole) flow??
Bruce,
Your suspicions are correct. The flow indicated on that diagram are reversed.
While there was some discussion that it might have been copied from a Chevy LT1 manual, is even wrong for that and incomplete too.
If you care, you can scroll back to 18 March and look for "Winter 2020 Vintage RVing".
Hope you are both well and comfortable.
Matt
Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
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| Re: [GMCnet] Coolant flow diagram in GMCMI Winter 2020 backwards? [message #353730 is a reply to message #353729] |
Sun, 12 April 2020 10:19 |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
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It is simple to explain. Graphic Artists are not mechanics. Neither are
most proofreaders and publishers.
"BONEHEADS" come in all professions.
Jim Hupy
Salem, Oregon
On Sun, Apr 12, 2020, 7:59 AM Matt Colie via Gmclist <
gmclist@list.gmcnet.org> wrote:
> RF_Burns wrote on Sun, 12 April 2020 10:27
>> So.. full disclosure, I am only a farmboy mechanic so I'm no expert in
> anything... but isn't the coolant flow in the Winter 2020 edition of GMCMI
>> magazine Tech Corner, flowing backwards?
>>
>> Should not the hot coolant flow out of the top of the engine through the
> opened thermostat to the top of the rad??? And the cool coolant flow
>> from the bottom of the rad into the bottom of the engine?
>>
>> If the diagram is right... as soon as the coolant in the engine gets hot
> enough to open the thermostat, cold coolant would then flow through the
>> thermostat and immediately close it... leaving hot coolant in the rest
> of the engine.
>>
>> I did not go look up other diagrams, so maybe I am dead wrong here...
> but if so it challenges my farmboy engineering skills.
>>
>> The image is credited to Encyclopedia Britannica Getty Images so I am
> assuming this diagram has been checked over by those in the know...
>>
>> Or maybe is this like electron current flow vs conventional (hole) flow??
>
> Bruce,
>
> Your suspicions are correct. The flow indicated on that diagram are
> reversed.
>
> While there was some discussion that it might have been copied from a
> Chevy LT1 manual, is even wrong for that and incomplete too.
>
> If you care, you can scroll back to 18 March and look for "Winter 2020
> Vintage RVing".
>
> Hope you are both well and comfortable.
>
> 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
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
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| Re: Coolant flow diagram in GMCMI Winter 2020 backwards? [message #353734 is a reply to message #353729] |
Sun, 12 April 2020 13:11 |
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Richard RV
Messages: 631
Registered: July 2012
Location: Full-timer for 12 years, ...
Karma: -17
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Senior Member |
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Matt,
Did you report the error to the Britannica? Should be fixed and you should get credit. Maybe there's a bug finder's reward. Apple just paid some guy $75K for finding a bug. Britannica's bounty, if there is one, would probably be 4 or 5 orders of magnitude less. 
Richard
'77 Birchaven TZE...777;
'76 Palm Beach under construction;
‘76 Edgemont waiting its turn
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