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Posted: **Sat Oct 13, 2018 3:53 pm**

Just wondering how much water a 4.5 block would hold . Just for a idea to displace with anti freeze.

Posted: **Sun Oct 14, 2018 3:22 am**

My old Mercruiser 260 5.7 takes about 4 gallons to fill the block and manifolds through pulling and filling the hoses.

Posted: **Sun Oct 14, 2018 8:50 pm**

Thanks....

Posted: **Mon Oct 15, 2018 12:25 pm**

dogwspts wrote: Sat Oct 13, 2018 3:53 pm Just wondering how much water a 4.5 block would hold . Just for a idea to displace with anti freeze.

.

Posted: **Mon Oct 15, 2018 2:25 pm**

Thanks you are great.

Posted: **Mon Oct 15, 2018 7:42 pm**

If this is a closed cooling system you shouldn't have to mess with the block.

Anyone have a Idea how much coolant water a 4.5 block holds.