Emery, years ago when I was partners in an automotive machine shop, we
remanufactured cylinder heads, mostly foreign car stuff. Particularly Saab,
which were pourus sand castings. When we removed the core plugs, we always
inserted a pill inside the casting before replacing the freeze plugs. They
were as you described them, dark grey or black in color, and with coarse
fibers of some organic material visible. They were represented to us as
"what the manufacturer used". We also epoxied a metal disc on the outside
of the freeze plugs. Their purpose was to tell if the head had been
overheated. They either changed color or melted if that was the case. Kind
of an insurance policy against sloppy mechanics screwing up our good work.
We had a test tank to pressure test our heads with shop air, as well. The
discs dissolved when exposed to hot antifreeze. We had very few come backs
for leaks.
Jim Hupy
Salem, Or
78 GMC ROYALE 403
> OK. What is it that you don’t believe? The size of the pellets or
> something else?
>
> Emery Stora
>
> >
> > Emery, would you please site more source data points as I am not sure I
> > believe u.
> >
> >
> > Sully
> > 77 eleganza 2
> > Bellevue
> >
> > On Fri, Feb 23, 2018 at 3:46 PM Matt Colie
> >
> >>> Don't use a stop leak that is in an oil base. Barrs and others sell
> >> that. The oil can interfere with the antifoam additives in
> antifreeze. So
> >>> be sure to use a dry powder.
> >>>
> >>> General Motors, for over at least the last 70 years has put stop leak
> >> powder into their vehicles as a preventative measure. They use ground
> up
> >>> ginger root. There used to be a Vernor's Ginger Ale factory in
> >> Detroit. Someone found that ground up ginger root would seal up small
> >> leaks but not
> >>> harm the water pump or other internal engine parts. You can buy that
> >> stop leak in pellets about 1" in diameter and 1/2" thick. Usually in
> the
> >>> plastic bubble packs at the parts store.
> >>>
> >>> GM would put two pellets into a V-8 and one into a six cylinder on the
> >> assembly line.and
> >>> They are sold under the AC/Delco label and also other brands. Here is
> a
> >> picture on Amazon:
> >>>
> >> https://www.amazon.com/s/ref=nb_sb_noss?url=search-alias%
> 3Daps&field-keywords=stop+leak+pellets
> >>>
> >>> Back in the 70's both DuPont with their Xerex antifreeze and Dow
> >> Chemical's antifreeze advertised and sold jugs with stop leak already
> in the
> >>> antifreeze. DuPont used tiny styrene plastic pellets (which were made
> >> by Dow as water softener resin) and Dow used ginger root powder.
> >>>
> >>> Emery Stora
> >>> 77 Kingsley
> >>> Frederick, CO
> >>
> >> Just so you know not to waste the time and effort, Blackstone reported
> >> that our engine had coolant in the lube oil. As soon as I saw that, I
> when
> >> on
> >> the offensive and both monitored coolant loss and did lube oil changes
> >> regularly. I was still unsure, so I borrowed a cooling system tester
> and
> >> put
> >> pressure on the cold system for a day. It did lose some, but not a lot.
> >> So, I loaded (I do mean loaded) with the Barrs Leak pellets. the next
> three
> >> changes still showed coolant present.
> >>
> >> I case you weren't reading a few days ago, when I got the intake off,
> >> there was a visible leak path.....
> >>
> >> 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:
> >> 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
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
remanufactured cylinder heads, mostly foreign car stuff. Particularly Saab,
which were pourus sand castings. When we removed the core plugs, we always
inserted a pill inside the casting before replacing the freeze plugs. They
were as you described them, dark grey or black in color, and with coarse
fibers of some organic material visible. They were represented to us as
"what the manufacturer used". We also epoxied a metal disc on the outside
of the freeze plugs. Their purpose was to tell if the head had been
overheated. They either changed color or melted if that was the case. Kind
of an insurance policy against sloppy mechanics screwing up our good work.
We had a test tank to pressure test our heads with shop air, as well. The
discs dissolved when exposed to hot antifreeze. We had very few come backs
for leaks.
Jim Hupy
Salem, Or
78 GMC ROYALE 403
> OK. What is it that you don’t believe? The size of the pellets or
> something else?
>
> Emery Stora
>
> >
> > Emery, would you please site more source data points as I am not sure I
> > believe u.
> >
> >
> > Sully
> > 77 eleganza 2
> > Bellevue
> >
> > On Fri, Feb 23, 2018 at 3:46 PM Matt Colie
> >
> >>> Don't use a stop leak that is in an oil base. Barrs and others sell
> >> that. The oil can interfere with the antifoam additives in
> antifreeze. So
> >>> be sure to use a dry powder.
> >>>
> >>> General Motors, for over at least the last 70 years has put stop leak
> >> powder into their vehicles as a preventative measure. They use ground
> up
> >>> ginger root. There used to be a Vernor's Ginger Ale factory in
> >> Detroit. Someone found that ground up ginger root would seal up small
> >> leaks but not
> >>> harm the water pump or other internal engine parts. You can buy that
> >> stop leak in pellets about 1" in diameter and 1/2" thick. Usually in
> the
> >>> plastic bubble packs at the parts store.
> >>>
> >>> GM would put two pellets into a V-8 and one into a six cylinder on the
> >> assembly line.and
> >>> They are sold under the AC/Delco label and also other brands. Here is
> a
> >> picture on Amazon:
> >>>
> >> https://www.amazon.com/s/ref=nb_sb_noss?url=search-alias%
> 3Daps&field-keywords=stop+leak+pellets
> >>>
> >>> Back in the 70's both DuPont with their Xerex antifreeze and Dow
> >> Chemical's antifreeze advertised and sold jugs with stop leak already
> in the
> >>> antifreeze. DuPont used tiny styrene plastic pellets (which were made
> >> by Dow as water softener resin) and Dow used ginger root powder.
> >>>
> >>> Emery Stora
> >>> 77 Kingsley
> >>> Frederick, CO
> >>
> >> Just so you know not to waste the time and effort, Blackstone reported
> >> that our engine had coolant in the lube oil. As soon as I saw that, I
> when
> >> on
> >> the offensive and both monitored coolant loss and did lube oil changes
> >> regularly. I was still unsure, so I borrowed a cooling system tester
> and
> >> put
> >> pressure on the cold system for a day. It did lose some, but not a lot.
> >> So, I loaded (I do mean loaded) with the Barrs Leak pellets. the next
> three
> >> changes still showed coolant present.
> >>
> >> I case you weren't reading a few days ago, when I got the intake off,
> >> there was a visible leak path.....
> >>
> >> 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:
> >> 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
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
