Coolant flow diagram in GMCMI Winter 2020 backwards?

[RF_Burns]

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

 

[johnny]

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

 

[Matt Colie]

> 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

 

[Jim Hupy]

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 <

> > 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:
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>

 

[RF_Burns]

Matt,
Sorry I missed your post, I was driving home from Mexico at that time.

Interestingly when I tried to search for your posting using "winter 2020" it hits on my post, but completely misses yours. But if I search on "winter
2020 vintage" it finds your post and others in the thread.

Another reason to remind others to use the Google backup of GMCNet when doing searches as it uses Google's search engine.

--
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