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Coolant Tablets -Question


tomcad95

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The users manual says "Use GM Engine Coolant Supplement (sealer) with any complete coolant flush and refill" It is used to prevent leaks due to casting porosity. The 4.9 has o-rings at the cylinder sleeves and it is used to stop leaking there

They can be purchased at the dealer or some auto parts stores, they are made by GM and Bars Leak

If you look at your shock tower you may find a label that details that it must be used

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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You can also buy Bar's Leak Golden seal powder in tubes for about $1.44 at Wal-Mart. That stuff is made by the same company. Just remove the radiator cap (when engine is cold) and put the powder in the neck of the radiator slowly. Do not put it into expansion tank.

The saddest thing in life is wasted talent

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Even better..................Pull lower radiator hose and place

tabs inside of it. Will mix better and get into engine block

faster and more completely.

93 DeVille-13 Chevy Impala

72 GTO - 77 Triumph Bonneville

84 Z-28

Syracuse NY

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On a 4.9, the benefits FAR exceed the risks of NOT using the tablets, the worst of which might be an occasional heater core flush needed.

The 4.9 has cylinder sleeve o-rings, if they begin to leak, coolant will dilute the OIL and cause damage to the CAM lobes... They should be used on a 4.9 and 4100 and for an added measure of safety on the 4.6.

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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Personally I believe that because of the negative opinions against dexcool that floated around where brown sludge was created at the tank opening 'because of dexcool', GM stopped using the tablets to stop the complaints they received.

Here is another point of view on the subject

http://www.cadillacf...t-question.html

Furthermore, this came from BILL, the guru's former name. The guru was a GM Northstar Powertrain Engineer and I trust him. The most important thing to remember is, while GM stopped using the coolant supplement at some point (97/98, I think), the change was not retroactive. It is recommended for all 4.X engines, as seen in Bill's narritive at this link

http://www.caddyinfo...ntconfusion.htm

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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I recall reading somewhere that the GM supplement tabs are not only to help seal small leaks but help prevent corrosion around the head bolts. What I don't recall if it was a reliable source that I read it.

Head gaskets prevent corrosion around the bolts. The tabs are for porous aluminum castings and minor niusance leaks. Nothing more.

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I recall reading somewhere that the GM supplement tabs are not only to help seal small leaks but help prevent corrosion around the head bolts. What I don't recall if it was a reliable source that I read it.

Head gaskets prevent corrosion around the bolts. The tabs are for porous aluminum castings and minor niusance leaks. Nothing more.

There is a theory that bars leaks powder also decreases abrasive action of loose silicates on water pump seals. That theory may have some merit.

The saddest thing in life is wasted talent

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Or forget the Dex-cool all together and use universal anti freeze. Look at this link below. When I had my radiator replaced my mechanic wanted to use universal anti freeze I told him stick to Dexi cool, he did but told me to research dexi-cool because he will no longer use it because there is strong proof that it does detriorate engine parts.

http://www.consumeraffairs.com/automotive/gm_dexcool_p3.html

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Or forget the Dex-cool all together and use universal anti freeze. Look at this link below. When I had my radiator replaced my mechanic wanted to use universal anti freeze I told him stick to Dexi cool, he did but told me to research dexi-cool because he will no longer use it because there is strong proof that it does detriorate engine parts.

http://www.consumeraffairs.com/automotive/gm_dexcool_p3.html

I like the story where the guy was blaming his transmission failure on Dexcool and wanted GM to pay for the trans.... or the 3.1/3.4 engines with bad intake manifolds on Dexcool. Dexcool seems to be the scapegoat for other problems such as a poor EGR passage design on the 3.1/3.4 engine, etc.

I wouldn't want to validate "universal" antifreeze in my cars.

Kevin
'93 Fleetwood Brougham
'05 Deville
'04 Deville
2013 Silverado Z71

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I had to replace the intake manifold gaskets on my 3.1 Chevy and it was not caused by Dexcool, the gasket/seals were redesigned

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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