| [GMCnet] Tid Bit Engine heat build up. The Radiator [message #354944] |
Thu, 21 May 2020 14:07  |
BobDunahugh
Messages: 2465
Registered: October 2010
Location: Cedar Rapids, IA
Karma: 11
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Senior Member |
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As a note to start. We have a 78- 403, 3:70 FD Royale. With a Howell EFI. The Royale's weigh more than any other GMC. At about 12,000 lbs. And always have something in tow. When pulling Linda's lift van. Total GVW is at 17,000 lbs. When pulling my 24 ft enclosed trailer. With a Chevelle convert inside. 24.000 lbs GVW.
This has been discussed over many years. But I believe a review for new owners is in order. Starting with the radiator. The stock radiator when new. Was over sized. And can handle a lot of bugs in it. I've never seen one that didn't need a good cleaning. The best way to do a proper inspection. At night. Put a very big/bright flood light in front of the grill. About 6 ft away. Then go inside with a mirror. In this way. You can examine all areas. Look for areas that let very little light in. Use a hose. With the water stream from the back. toward the grille. That has a very aggressive stream of water. I've had it take over an hour of spraying to get the job done. A power washer will also work well. But be careful to not bend the fines. This cleaning. Well lower over all, under body heat. By increasing pure air volume.
As a note. If you have a 455. Find a junked GMC that came with the 403. Late 77, and all 78's. These all had 403's. The radiators in those. Had greatly improved air ducting in front, and the backside of the rad.
Your always welcomed to privet e-mail. Or phone call Iowa. 319-521-4891 Cell
Bob Dunahugh
78 Royale since 2003
4 real Copo Yenkos
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| Re: [GMCnet] Tid Bit Engine heat build up. The Radiator [message #354946 is a reply to message #354944] |
Thu, 21 May 2020 14:44  |
Ken Shaffer
Messages: 89
Registered: September 2017
Location: Marion Iowa
Karma: -1
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Member |
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Bob, Glad your back!
I miss your tidbit posts. Cleaning front of radiator is one of those tasks
that I may have overlooked. Mine is new, but will have to remember to list
this for regular maintenance. I plan on killing alot of bugs in the near
future with my GMC!
Ken Shaffer
Marion, Iowa
73 GMC Canyonlands (455)
73 GMC Glacier (455)
On Thu, May 21, 2020 at 2:08 PM Bob Dunahugh via Gmclist <
gmclist@list.gmcnet.org> wrote:
> As a note to start. We have a 78- 403, 3:70 FD Royale. With a Howell
> EFI. The Royale's weigh more than any other GMC. At about 12,000 lbs. And
> always have something in tow. When pulling Linda's lift van. Total GVW is
> at 17,000 lbs. When pulling my 24 ft enclosed trailer. With a Chevelle
> convert inside. 24.000 lbs GVW.
>
> This has been discussed over many years. But I believe a review for new
> owners is in order. Starting with the radiator. The stock radiator when
> new. Was over sized. And can handle a lot of bugs in it. I've never
> seen one that didn't need a good cleaning. The best way to do a proper
> inspection. At night. Put a very big/bright flood light in front of the
> grill. About 6 ft away. Then go inside with a mirror. In this way. You can
> examine all areas. Look for areas that let very little light in. Use a
> hose. With the water stream from the back. toward the grille. That has a
> very aggressive stream of water. I've had it take over an hour of spraying
> to get the job done. A power washer will also work well. But be careful to
> not bend the fines. This cleaning. Well lower over all, under body heat. By
> increasing pure air volume.
> As a note. If you have a 455. Find a junked GMC that came with the
> 403. Late 77, and all 78's. These all had 403's. The radiators in those.
> Had greatly improved air ducting in front, and the backside of the rad.
> Your always welcomed to privet e-mail. Or phone call Iowa. 319-521-4891
> Cell
> Bob Dunahugh
> 78 Royale since 2003
> 4 real Copo Yenkos
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
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Ken Shaffer
Marion Iowa
73 Canyon Lands, 455, Micro-level, Alum radiator, Alcoa wheels, Lenzi hubs/bearings, Howell EFI/EBL, Rostra Cruise, Custom interior
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| Re: [GMCnet] Tid Bit Engine heat build up. The Radiator [message #354954 is a reply to message #354946] |
Thu, 21 May 2020 15:42 |
Mike Kelley
Messages: 467
Registered: February 2017
Karma: -2
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Senior Member |
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Bob D.:
Glad to see you on here w/ tidbits. And you may have just saved my bacon - have rig (Elly) in shop now - will ask them to check radiator- don’t remember that being done in the 7 years of ownership!
Thanks Man,
Mike/The Corvair a holic
Sent from my iPhone
> On May 21, 2020, at 2:44 PM, Ken Shaffer via Gmclist wrote:
>
> Bob, Glad your back!
> I miss your tidbit posts. Cleaning front of radiator is one of those tasks
> that I may have overlooked. Mine is new, but will have to remember to list
> this for regular maintenance. I plan on killing alot of bugs in the near
> future with my GMC!
>
> Ken Shaffer
> Marion, Iowa
> 73 GMC Canyonlands (455)
> 73 GMC Glacier (455)
>
>
> On Thu, May 21, 2020 at 2:08 PM Bob Dunahugh via Gmclist gmclist@list.gmcnet.org> wrote:
>
>> As a note to start. We have a 78- 403, 3:70 FD Royale. With a Howell
>> EFI. The Royale's weigh more than any other GMC. At about 12,000 lbs. And
>> always have something in tow. When pulling Linda's lift van. Total GVW is
>> at 17,000 lbs. When pulling my 24 ft enclosed trailer. With a Chevelle
>> convert inside. 24.000 lbs GVW.
>>
>> This has been discussed over many years. But I believe a review for new
>> owners is in order. Starting with the radiator. The stock radiator when
>> new. Was over sized. And can handle a lot of bugs in it. I've never
>> seen one that didn't need a good cleaning. The best way to do a proper
>> inspection. At night. Put a very big/bright flood light in front of the
>> grill. About 6 ft away. Then go inside with a mirror. In this way. You can
>> examine all areas. Look for areas that let very little light in. Use a
>> hose. With the water stream from the back. toward the grille. That has a
>> very aggressive stream of water. I've had it take over an hour of spraying
>> to get the job done. A power washer will also work well. But be careful to
>> not bend the fines. This cleaning. Well lower over all, under body heat. By
>> increasing pure air volume.
>> As a note. If you have a 455. Find a junked GMC that came with the
>> 403. Late 77, and all 78's. These all had 403's. The radiators in those.
>> Had greatly improved air ducting in front, and the backside of the rad.
>> Your always welcomed to privet e-mail. Or phone call Iowa. 319-521-4891
>> Cell
>> Bob Dunahugh
>> 78 Royale since 2003
>> 4 real Copo Yenkos
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
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