Home » Public Forums » GMCnet » [GMCnet] Motor flush?
| [GMCnet] Motor flush? [message #336623] |
Sat, 01 September 2018 17:48  |
Dave Stragand
Messages: 307
Registered: October 2017
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Hi All,
I can only imagine the can of worms this might open, but how many of you use a product like ‘5 minute motor flush’, kerosene, or ATF in your crankcase before an oil change? I have had fantastic luck with it on my ‘59’s MoPars and an old Chevy 350 I used to have, but I wondered how many folks might use one of these products on their coach (I have a 403).
-Dave
1978 Transmode near Pittsburgh.
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1978 Transmode (403)
Pittsburgh, PA
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| Re: [GMCnet] Motor flush? [message #336627 is a reply to message #336623] |
Sat, 01 September 2018 21:15  |
johnd01
Messages: 354
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Location: Sacrameot
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Considering the last quart does not drain, I would not dair.
On Sat, Sep 1, 2018 at 3:49 PM Dave Stragand
wrote:
> Hi All,
>
> I can only imagine the can of worms this might open, but how many of you
> use a product like ‘5 minute motor flush’, kerosene, or ATF in your
> crankcase before an oil change? I have had fantastic luck with it on my
> ‘59’s MoPars and an old Chevy 350 I used to have, but I wondered how many
> folks might use one of these products on their coach (I have a 403).
>
> -Dave
> 1978 Transmode near Pittsburgh.
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
*John Phillips*
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Johnd01
John Phillips
Avion A2600 TZE064V101164
Rancho Cordova, CA (Sacramento)
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| Re: [GMCnet] Motor flush? [message #336631 is a reply to message #336627] |
Sun, 02 September 2018 09:21 |
GMC.LES
Messages: 505
Registered: April 2014
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Dave,
Im curious to know what problem you are trying to solve that requires the use of these additives? What results are you obtaining that lead you to believe that you are having good success?
I have always felt that oil change intervals will determine how clean your engine will remain throughout its life. If you are seeing excessive oil contaminates, change the oil more frequently, and/or use a better quality of oil. The factory recommended oil change intervals are a guideline that covers typical use. Operating an engine at the extremes may require an altered oil change interval to compensate for those extremes.
An example would be an engine that does extended idle and low speed service in extreme cold. The oil never gets warm enough to burn off the moisture, resulting in sludge and acid build-up. Changing the oil more frequently will help prolong engine life by removing the contaminates before they become excessive and create bigger problems.
Les Burt
Montreal
'75 Eleganza 26'
> On Sep 1, 2018, at 10:15 PM, John Phillips wrote:
>
> Considering the last quart does not drain, I would not dair.
>
> On Sat, Sep 1, 2018 at 3:49 PM Dave Stragand
> wrote:
>
>> Hi All,
>>
>> I can only imagine the can of worms this might open, but how many of you
>> use a product like ‘5 minute motor flush’, kerosene, or ATF in your
>> crankcase before an oil change? I have had fantastic luck with it on my
>> ‘59’s MoPars and an old Chevy 350 I used to have, but I wondered how many
>> folks might use one of these products on their coach (I have a 403).
>>
>> -Dave
>> 1978 Transmode near Pittsburgh.
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>
>
>
> --
>
> *John Phillips*
> _______________________________________________
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| Re: [GMCnet] Motor flush? [message #336642 is a reply to message #336623] |
Sun, 02 September 2018 13:41 |
JohnL455
Messages: 4447
Registered: October 2006
Location: Woodstock, IL
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Nope. Knocking sludge loose is a recipe for problems. And solvent displaces lube oil on walls and bearings. If worried, shorten your interval and wait till rebuild time for total de sludging and de Carboning, as what is settled out is settled out and not in the fluid circulation.
John Lebetski
Woodstock, IL
77 Eleganza II
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| Re: [GMCnet] Motor flush [message #336663 is a reply to message #336637] |
Sun, 02 September 2018 21:29 |
Dave Stragand
Messages: 307
Registered: October 2017
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My motivation for asking: I don't have any immediate need to use one as of yet, but I wondered if anyone was using such a flushing product in their GMC.
I had a 70's Chevy that I used the '5 minute motor flush' on for years. I could pull the valve covers and adjust the rockers and never even get my hands dirty. It always looked spotless inside.
When I got my '59 DeSoto, the sludge was so thick under the valve covers that you couldn't see the rockers -- and that was with regular oil changes by the previous owner. Got about a coffee can of sludge out with a spoon, and then did a few oil/filter changes with the same flush product, and it got to be as clean as the Chevy inside.
That's my history with flushes. Now, on the GMC, I will be doing my first oil change shortly. So far, no one has said that they use a flush product, so I will probably skip it for now. Was looking at it simply as a preventative/cleaning measure.
Thanks, All.
-Dave
1978 Transmode near Pittsburgh
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| Re: [GMCnet] Motor flush? [message #336664 is a reply to message #336661] |
Sun, 02 September 2018 21:38 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
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Back in the late '70's I had a young captain working for me -- brilliant
PhD with 10 kids at the time (15 later). He had a '65 Ford station wagon
with 275,000 miles, always using Quaker State motor oil.
One day he called me in a panic. He'd put another brand of motor oil
(detergent) in the engine. Now the oil was like black thick molasses. The
best I could suggest was a couple more quick oil changes with the usual
Quaker State. That worked and the car lasted another couple of years, to
my knowledge.
So, it's not just flushing agents one should guard against.
Ken H.
On Sun, Sep 2, 2018 at 9:32 PM Jerry Sitzlar via Gmclist <
gmclist@list.gmcnet.org> wrote:
> Air Force buddy of mine way back at the beginning of my USAF career had a
> 1950 Plymouth. One day he put an anti-sludge product that worked as
> advertised, it busted all of the sludge out of his engine. Drained the old
> oil and filled it up with new oil. That was the end of his car since he
> couldn't afford an engine rebuild. It seems the sludge was preventing the
> gaskets and seals from leaking. After the cleaning, he couldn't keep the
> oil from leaking out everywhere. Extreme case but beware IMHO.
>
> Jerry
> --
> Jerry Sitzlar.....
> 77 Eleganza II, Twin bed, dry bath......
> Lenoir City, TN (near Knoxville)
>
>
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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| Re: [GMCnet] Motor flush? [message #336672 is a reply to message #336664] |
Mon, 03 September 2018 08:45 |
GMC.LES
Messages: 505
Registered: April 2014
Karma: -2
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Dave,
Is it possible that your friend only drove the 59 Desoto for very short distances?
Les Burt
Montreal
'75 Eleganza 26'
> On Sep 2, 2018, at 10:38 PM, Ken Henderson wrote:
>
> Back in the late '70's I had a young captain working for me -- brilliant
> PhD with 10 kids at the time (15 later). He had a '65 Ford station wagon
> with 275,000 miles, always using Quaker State motor oil.
>
> One day he called me in a panic. He'd put another brand of motor oil
> (detergent) in the engine. Now the oil was like black thick molasses. The
> best I could suggest was a couple more quick oil changes with the usual
> Quaker State. That worked and the car lasted another couple of years, to
> my knowledge.
>
> So, it's not just flushing agents one should guard against.
>
> Ken H.
>
> On Sun, Sep 2, 2018 at 9:32 PM Jerry Sitzlar via Gmclist gmclist@list.gmcnet.org> wrote:
>
>> Air Force buddy of mine way back at the beginning of my USAF career had a
>> 1950 Plymouth. One day he put an anti-sludge product that worked as
>> advertised, it busted all of the sludge out of his engine. Drained the old
>> oil and filled it up with new oil. That was the end of his car since he
>> couldn't afford an engine rebuild. It seems the sludge was preventing the
>> gaskets and seals from leaking. After the cleaning, he couldn't keep the
>> oil from leaking out everywhere. Extreme case but beware IMHO.
>>
>> Jerry
>> --
>> Jerry Sitzlar.....
>> 77 Eleganza II, Twin bed, dry bath......
>> Lenoir City, TN (near Knoxville)
>>
>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>
> _______________________________________________
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| Re: [GMCnet] Motor flush? [message #336673 is a reply to message #336672] |
Mon, 03 September 2018 08:57 |
Dave Stragand
Messages: 307
Registered: October 2017
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Possibly. I think he mostly just drove it in and around Pittsburgh.
When I first pulled the valve covers, it looked like there was a shiny
plastic liner on top of the rockers. When I went to lift it off, I
found it was a huge shell of sludge. It had the consistency of Noxzema
or a heavy buttercream cake frosting. Pretty amazing considering that
he documented 4 oil changes per year. Those were the days before
detergent oils though.
I believe a '78 403 would have lived its whole life with detergent oils,
so I wouldn't imagine anywhere near that amount of sludge would be
inside.
-----Original Message-----
From: Gmclist [mailto:gmclist-bounces@list.gmcnet.org] On Behalf Of Les
Burt
Sent: Monday, September 03, 2018 9:45 AM
To: gmclist@list.gmcnet.org
Subject: Re: [GMCnet] Motor flush?
Dave,
Is it possible that your friend only drove the 59 Desoto for very short
distances?
Les Burt
Montreal
'75 Eleganza 26'
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1978 Transmode (403)
Pittsburgh, PA
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| Re: [GMCnet] Motor flush? [message #336678 is a reply to message #336673] |
Mon, 03 September 2018 09:44 |
GMC.LES
Messages: 505
Registered: April 2014
Karma: -2
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Dave,
Sludge is usually caused by moisture in the oil. The moisture can accumulate during short run periods where the oil temp doesn’t reach near 212°F.
On our coaches, the typical use is several hours at highway speeds, where oil temps get high enough to boil off the moisture. This means that sludge is rarely found in our coach engines, unless we do lots of short idle time, or a coolant leak develops.
Les Burt
Montreal
'75 Eleganza 26'
> On Sep 3, 2018, at 9:57 AM, Dave Stragand wrote:
>
> Possibly. I think he mostly just drove it in and around Pittsburgh.
>
> When I first pulled the valve covers, it looked like there was a shiny
> plastic liner on top of the rockers. When I went to lift it off, I
> found it was a huge shell of sludge. It had the consistency of Noxzema
> or a heavy buttercream cake frosting. Pretty amazing considering that
> he documented 4 oil changes per year. Those were the days before
> detergent oils though.
>
> I believe a '78 403 would have lived its whole life with detergent oils,
> so I wouldn't imagine anywhere near that amount of sludge would be
> inside.
>
> -----Original Message-----
> From: Gmclist [mailto:gmclist-bounces@list.gmcnet.org] On Behalf Of Les
> Burt
> Sent: Monday, September 03, 2018 9:45 AM
> To: gmclist@list.gmcnet.org
> Subject: Re: [GMCnet] Motor flush?
>
> Dave,
>
> Is it possible that your friend only drove the 59 Desoto for very short
> distances?
>
> Les Burt
> Montreal
> '75 Eleganza 26'
>
> _______________________________________________
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> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
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| Re: [GMCnet] Motor flush? [message #336703 is a reply to message #336623] |
Mon, 03 September 2018 21:57 |
JohnL455
Messages: 4447
Registered: October 2006
Location: Woodstock, IL
Karma: 12
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A short trip in a GMC is to the engine, like a normal length pass car trip, due to the high GVW. That is a good thing in that respect.
John Lebetski
Woodstock, IL
77 Eleganza II
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| Re: [GMCnet] Motor flush? [message #336705 is a reply to message #336623] |
Mon, 03 September 2018 22:00 |
JohnL455
Messages: 4447
Registered: October 2006
Location: Woodstock, IL
Karma: 12
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As far as what GM has to say about it, they recommend adding EOS in certain abnormal driving conditions. I do not recall them advocating flush.
John Lebetski
Woodstock, IL
77 Eleganza II
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| Re: [GMCnet] Motor flush? [message #336722 is a reply to message #336623] |
Tue, 04 September 2018 11:24 |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
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A GMC Jimmy with a 455 in it. Cool - how did it get there?
--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: [GMCnet] Motor flush? [message #336723 is a reply to message #336623] |
Tue, 04 September 2018 11:37 |
JohnL455
Messages: 4447
Registered: October 2006
Location: Woodstock, IL
Karma: 12
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Bob I know they reformulated EOS years back, but to my knowledge it was a detergency booster. Never had the STP honey like consistency.
John Lebetski
Woodstock, IL
77 Eleganza II
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