I recently changed the antifreeze and back flushed the radiator/heater
The radiator specs were 7.2 qts. So, I added 4 qts antifreeze and
topped off with water. I drove the truck for a few miles, and then
topped off again with water. I drove a few more miles and everything
seemed ok. Once the engine cooled off, I checked the antifreeze
levels and I have roughly a 50/50 coolant to water. More than
Will this higher concentration of antifreeze cause any problems?
When I drain the radiator after flushing, I can never add much more than
about half the total coolant capacity due to residual water left in the
block. I always add 100% coolant to get to the ideal 50/50 mix. If you
can't remove ALL the water before adding a 50/50 mix, you'll wind up
with less than adequate protection; probably closer to 30/70 coolant to
water. dont_pick_up_the_phone did it exactly right. 56% mixture is just
Mixing before adding to the system is difficult to do unless you're able to
remove "all" water from the back flush. I don't know of an easy way to
accomplish removing "all" the water. Maybe some one can provide a method.
However, if one can't remove "all" the water the method in the first post is
the right way to make the change. The important part was the "check to see
the protection level," with out the check one would never know if the
mixture ratio of antifreeze to water was correct. It's also best not to use
water that has a high mineral content.
-- The block has a drain to let out the water. On most vehicles it is just a
bolt or a threaded plug. BUT- It's usually rusted in pretty well and bettter
left alone. It's also not necessasrily in a place where it's easily
Every day is a good day- it's just that some are better than others.
Maybe 2 or 3 litres at the most.
If you're talking about the entire cooling system, and not just the rad :), then
about 10 quarts for the 2.3 4-cyl, 11.8 for the 3.8 V6, and 14.2 for the 5.0 V8.
I'm assuming that's in US quarts, so that would be 9.4, 11.1 and 13.4 litres.
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