Tid Bit. Is your radiator up to the task.

[Bob Dunahugh]

This isn't a real scientific test. But an indication of the ability of the radiator to transfer heat. I've done it on 4 GMCs. Drained, flushed, and filled the system. Then took it on a short highway trip. Try to do it on days above 85 degrees. Then come back to pull the 195-degree thermostat out. Refill for that same trip again. If the engine temp is anywhere around 155 degrees. I see that the radiator has good flow. If the temp is around 175 degrees, or higher. Thus, the radiator is acting as a thermostat. By the restriction to the flow of coolant/ heat. It's just an indication. Nothing more.
Bob Dunahugh

________________________________
From: Bob Dunahugh
Sent: Tuesday, June 9, 2020 6:49 PM
To: gmclist
Subject: Tid Bit. Is my radiator up to the task.

Many Many years ago. I wanted to know if my radiators cooling capabilities had decreased over time. Because of deposit buildup from leaving anti-freeze in more the 3 years. So, I pulled the thermostat out. Put the coolant that I had drained out, back in. Then went for a drive. If the temps are much lower. Then I knew that the radiator was up to the task.
There are many more areas to cover on this topic of cooling the engine/trans. As to the cooling of our GMCs. And those can be covered if there's interest. In short. Buy the things that you find you need. Not the things that you think you need.
Bob Dunahugh
78 Royale since 2003
4 real COPO Yenkos

 

[grant schaffer]

So last week I took my original radiator out to get a new core installed and my local guys added a heavy duty option which increased to 13 fins per
inch. the radiator looks great and works great. Some things I keep original as it has lasted this long. The cost was $725.00 for the heavy duty core.

Grant
--
1974 GMC Sequoia 26'

 

[Jim Hupy]

Absolutely nothing wrong with the Original radiators in the GMC. Corrosion
and electrolysis resistant, fairly easily repaired, entirely adequate for
their purpose of cooling the engines used in our coaches. But, they are a
bit heavy. If that is your concern, lose the OEM jack and chain. They are
about the most useless thing carried in our coaches. That should easily
save you the difference in weight between the OEM vs Aluminum radiators.
Jim Hupy
Salem, Oregon

On Fri, Jun 12, 2020, 1:50 PM Grant Schaffer via Gmclist <

> So last week I took my original radiator out to get a new core installed
> and my local guys added a heavy duty option which increased to 13 fins per
> inch. the radiator looks great and works great. Some things I keep
> original as it has lasted this long. The cost was $725.00 for the heavy
> duty core.
>
> Grant
> --
> 1974 GMC Sequoia 26'
>
>
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> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>

 

[peer oliver schmidt]

> That should easily save you the difference in weight between the OEM
> vs Aluminum radiators.

Isn't wait upfront a good thing with a FWD car? Sometimes, when going on
the onramp of the Autobahn, I do wish for more weight upfront, so that I
do not have to be easy on the throttle.

--
Best regards

Olly Schmidt
PGP KeyID: 0x4196BF22
'76a 26' Eleganza II - Virginia, US
'73 23' Sequoia - Schleswig-Holstein, Germany

 

[jim kanomata1]

Olly,
Our LSD helps to keep traction on both sides.

On Fri, Jun 12, 2020 at 11:44 PM Olly Schmidt via Gmclist <

> > That should easily save you the difference in weight between the OEM
> > vs Aluminum radiators.
>
> Isn't wait upfront a good thing with a FWD car? Sometimes, when going on
> the onramp of the Autobahn, I do wish for more weight upfront, so that I
> do not have to be easy on the throttle.
>
> --
> Best regards
>
> Olly Schmidt
> PGP KeyID: 0x4196BF22
> '76a 26' Eleganza II - Virginia, US
> '73 23' Sequoia - Schleswig-Holstein, Germany
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>

--
Jim Kanomata
Applied/GMC, Newark,CA
jimk
http://www.gmcrvparts.com
1-800-752-7502