Cooling Question

DrCjV

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Need some help from all the experts on here. I have a 99 Roush bought new with built motor and vortech SC. I recently flushed the cooling system. Two questions :

1. Where do I fill the expansion tank to it only has one line about a 1/2 inch from the top.

2. I was always of the belief that when motor got hot the amount of coolant in tank increases and the decreases when cool. My car is doing the complete opposite when hot level goes down about an 1 1/2" and comes back up when cool.

Can anyone explain this I called 2 Ford dealers they had no clue. Any ideas? 991.jpg 993.jpg 992.jpg
 

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