Yes, anything you want is fine. BUT, be sure to add the sealer tabs or powder. If you get the sealer tabs from the dealer, you have to crush them up and place the powder in the lower radiator hose. Or, you can get Bars Leaks Gold powder from Wal-Mart. Same stuff, but it is already in a powder you just dump into the lower radiator hose.
Yes, it is also in liquid form. You do not want this stuff though. It can cause other problems in some engines, and does not do the same thing as the powder. The powder is some organic compound (ginger root?) that "clots" when it is stationary. As the coolant moves around the system, it is kept in fine particles, but when there is a leak the flow slows down enough at the leak to cause the clotting action.
First, You need to run a 50/50 mix of antifreeze in that engine. Now as an added bonus here's the scoop on the pellets......The GM coolant supplement pellets are made by the same company that markets the BarsLeak brand. The powdered BarsLeak gold is the same as the GM supplement. The BarsLeak in the jar with the brown liquid has the same material for sealant as the GM supplement but includes the soluable oil (brown liquid) to make it easier to pour in.
The water pump does not need any sort of lubricant....
There are other sorts of sealers and brands on the market. I personally only recommend the conventional BarsLeak, BarsLeak Gold or the GM coolant supplement based on the extremely successful testing that has been done in the past with those products.
The ingredient in the coolant supplement is ground up ginger root and walnut shells. The fibers in the ginger root mat in a leak and swell when exposed to the air on the other side of the leak to seal it. The other sealers that use metallic components (
such as BarsLeak Liquid Aluminum or the Solder Seal sealant) are definitely NOT recommended. The GM sealant and/or the BarsLeak brand is better because of the ability of the sealant to seal any coolant seepages without doing any other harm to the system. The main focus of the recommendation to use the supplement is to
protect against any internal seepages that would put coolant into the oil and be invisible otherwise. The ground up ginger root has proven to be one of the best imaginable cooling system sealers through the process of elimination. It just works better
than anything else currently known and is basically harmless to the cooling system otherwise.
The use of cooling system sealers is widespread in the automotive industry and elsewhere. Most makers install the supplement at the factory. I have been told by reputable sources that even the cooling systems in nuclear submarines use the same "coolant supplement" this should help clear up the mystery.
I wasn't paying much attention to this topic until I took the time to read it. I don't know anything about coolant sealant that you guys are talking about, although I have heard of it in the past; so are they recommended to be added in addition to the usual coolant flush every year? If so, do I pour it in after opening the radiator cap or just the reservior box? Let me know more about this stuff as I am about to flush my coolant very soon. Thanks.
Also, is the engine block really aluminum? I thought both the heads and the block were cast iron. If the block is aluminum, are the heads aluminum also?