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Old 05-16-2018, 08:28 AM   #1
brian schuetta
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Default AC Delco Seal Tabs

Anyone using these? They are placed in a water passage of an engine during assembly and dissolve when water is added? Was shown these things yesterday but had never seen them before.
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Old 05-16-2018, 08:36 AM   #2
Bobby DiDomenico
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Default Re: AC Delco Seal Tabs

Had, and used, a couple of packages of them when I had the Buick. Wanted to make sure I didn't have to yank the heater core.
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Old 05-16-2018, 01:07 PM   #3
Dragsinger
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Default Re: AC Delco Seal Tabs

Brian,

the Delco tabs are a good product. In addition to the method you mentioned they can be put into any cooling system at any time.

The tabs were developed for the North Star Cadallic aluminum blocks which leaked around the head studs.
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Old 05-16-2018, 01:24 PM   #4
killintime6968
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Default Re: AC Delco Seal Tabs

I have used them many times over the years for weaping headgaskets and heads. The PN is #10953473
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Old 05-16-2018, 01:41 PM   #5
Chevy55
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Default Re: AC Delco Seal Tabs

https://www.amsoil.com/techservicesb...%20Tablets.pdf
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Old 05-16-2018, 02:45 PM   #6
FED 387
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Default Re: AC Delco Seal Tabs

12378255 GM part number
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Old 05-16-2018, 07:35 PM   #7
Tom Goldman
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Default Re: AC Delco Seal Tabs

The GM "horse pills" saved my butt many times when I ran welded GM 074 castings.
Subaru also has a sealer that works amazingly well and its cheap, about $1.50 for a 3 oz bottle. they call it a "conditioner" but it really works on leaky heads and since its a liquid ,it doesn't block up the rad passages.
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Old 05-17-2018, 09:45 AM   #8
brian schuetta
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Default Re: AC Delco Seal Tabs

Will try them then on the new engine we are about to finish.
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