How to add GM Block Sealing Tablets to Cooling System?

How to add GM Block Sealing Tablets to Cooling System? - Saab 9-3SS Bulletin Board - Saabnet.com

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How to add GM Block Sealing Tablets to Cooling System? Posted by MI-Roger [Email]

(#882) [Profile/Gallery] (more from MI-Roger) on Sun, 26 May 2019 13:45:29

I ordered a card of the GM Block Sealing Tablets to see if they eliminate the low amounts of coolant detected in the engine oil. I haven't received the tablets yet so maybe this question will be answered when the card of tablets is in hand, but how are they to be added to the coolant system?

Crush the tablets or use whole?
Add the tablets or powder to recovery bottle?
Disconnect upper radiator hose and push the material into the radiator?

My plan is to add the material, drive 500 miles, then change the engine oil which will have 2K miles on it by then. Use this oil for 3K miles, change again and collect a sample of the 3K mile oil for testing. Compare these results to the previous oil sample test results, compensating for the reduced mileage when comparing PPM values.

Thanks,

->Posting last edited on Sun, 26 May 2019 14:07:13.

_______________________________________ Saabs owned: 2008 9-5 Aero Sedan 2006 9-3SC 2.0T 2000 Viggen Convertible 2000 9-5lpt Sedan, sold at 318K miles

Posts in this Thread:

How to add GM Block Sealing Tablets to Cooling System?, MI-Roger , Sun, 26 May 2019 13:45:29 <-- Viewing This Message
- I would start with a drain and refill of Dexcool., jimmy, Mon, 27 May 2019 08:04:25
  - I was planning to drain and refill of Dexcool., MI-Roger , Tue, 28 May 2019 03:10:20

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