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The 1981 Chevy Malibu 350 engine thermostat is located on the front of the engine. You can follow the water supply hose from the radiator to the thermostat.
This really depends on what engine your F-350 has in it and if it is equipped with the California Emissions system. If you have a 7.5L EFI engine, then the vaccuum diagram will be located on the air filter housing cover. we have looked everywhere there is no diagram to be found it is a 7.5 efi and not california emission.
Atk engines com or 350 Chevy engines com
The thermostat on a Chevy 350 is under the housing at the engine end of the upper radiator hose.The thermostat on a Chevy 350 is under the housing at the engine end of the upper radiator hose.
A vacuum hose diagram for a 5.7 liter 350 Tbi is available through a factory service repair manual. These manuals are readily available to be downloaded from online forums and car websites.
water pump will sit on engine with lower radiator hose inlet to the left, make sure you dont have a "long water pump", it wont work, 350 is a "short water pump"
go to autozone.com..theres a page of nothing but mannuels for everything you will ever need.. hope that will help you out..
The outlet from the 350 engine to feed the heater core would be the one closest to the thermostat.
There should be a sticker located in the engine compartment that shows the emission related vacuum line routing.
Just follow the top radiator hose to were it clamps onto the engine, That will be the thernostat housing, just remove that housing and it will be right there. You will need to drain engine coolant first. MAKE SURE ENGINE IS COLD. That is if the engine is a 5.7L 350. If it is something other then a 5.7L 350. Then the thermostat will be were the lower radiator hose clamps onto the engine, That will be the thermostat housing, remove it. If it is a V6 engine then it will be at the end of the top hose, just like the 350 engine.
The diagram is in your left sock.