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Re: antifreeze change
Rick, I tend to be anal about such things, but if it were me, I would drain the system immediately and flush it completely as Bob described. In fact, I'm not sure I would even consider using Dexcool in a classic car.
I don't know if Texaco has changed the Dexcool formula, but the old Dexcool was likely to cause you enough problems WITHOUT mixing it with the green stuff; these problems would be exaggerated in an older car designed to draw in air as the radiator and engine cool.
I would not remove the block drain plugs unless you are prepared to round them or break them off; the advantage to removing the block drain plugs is that you can remove rusty sediment from the lower block, and that's a good thing when rebuilding, but not worth getting into extractions and other difficulties between rebuilds. Removing the block plugs is not necessary if you are only flushing the old anti-freeze out.
Rick, I tend to be anal about such things, but if it were me, I would drain the system immediately and flush it completely as Bob described. In fact, I'm not sure I would even consider using Dexcool in a classic car.
I don't know if Texaco has changed the Dexcool formula, but the old Dexcool was likely to cause you enough problems WITHOUT mixing it with the green stuff; these problems would be exaggerated in an older car designed to draw in air as the radiator and engine cool.
I would not remove the block drain plugs unless you are prepared to round them or break them off; the advantage to removing the block drain plugs is that you can remove rusty sediment from the lower block, and that's a good thing when rebuilding, but not worth getting into extractions and other difficulties between rebuilds. Removing the block plugs is not necessary if you are only flushing the old anti-freeze out.
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