FORD SPARE PART DEALER
Al Ahram Auto Spare Parts
Contact Person: Nawazish Ilyas Hussain
Tel: 06 5396988
Mobile: 050 7560966
Fax: 06 5396977
PO Box: 33868
Sharjah
There is two different issues, car is over heating and AC throwing hot air.
If AC always throwing hot air: Check AC gas leak, fix it and then top up gas.
If AC throw hot air when overheating: Its normal as thats the way car has been design to remove AC load (45%) from engine when its overheating. In that case check AC fan, engine fan, coolant and coolant leak, water pump to diagnose why its heating up and get it fixed.
If talking for manifold, no its not necessary.
If talking about manifold gasket then its advisable to change both inlet and exhaust manifold gasket for equal life.
Get your seat belt pretensioner changed, as those pretensioner have some life and especially after minor accident some belts tend to hold up even on normal braking. Its very irritating, i had same type in my cadillac three years back.