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[GMCnet] Don't think the heater is at top performance. [message #328712] Tue, 30 January 2018 17:41 Go to next message
BobDunahugh is currently offline  BobDunahugh   United States
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Registered: October 2010
Location: Cedar Rapids, IA
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I found that my radiator flow is being restricted due to internal corrosion. Today I got to thinking that I'll bet my heater core is in the same condition. Next week I plan to change out the radiator. I need to run my inspection camera inside the heater core by pulling the heater hose off. Never thought of his relationship before. Bob Dunahugh 78 Royale
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Re: [GMCnet] Don't think the heater is at top performance. [message #328714 is a reply to message #328712] Tue, 30 January 2018 18:48 Go to previous messageGo to next message
Vern Crawford is currently offline  Vern Crawford   United States
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Registered: August 2016
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It will be interesting to "see" what you find in there. I know you will
keep us posted.

On Tue, Jan 30, 2018 at 5:41 PM, Bob Dunahugh wrote:

> I found that my radiator flow is being restricted due to internal
> corrosion. Today I got to thinking that I'll bet my heater core is in the
> same condition. Next week I plan to change out the radiator. I need to run
> my inspection camera inside the heater core by pulling the heater hose off.
> Never thought of his relationship before. Bob Dunahugh 78 Royale
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> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>



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Re: [GMCnet] Don't think the heater is at top performance. [message #328715 is a reply to message #328712] Tue, 30 January 2018 19:08 Go to previous message
JohnL455 is currently offline  JohnL455   United States
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Registered: October 2006
Location: Woodstock, IL
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Senior Member
You can "see" heater core by disconnecting heater hoses from engine and backflushing with the core "feed" hose in an empty washer fluid jug to catch the evidence. I use garden hose in the return line and start slowly then increase as junk comes out to try to not exceed 15 PSI or so.

John Lebetski
Woodstock, IL
77 Eleganza II

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