| Author |
Message |
Bob Wies (Ncbob)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, May 30, 2006 - 6:50 pm: | |
I'm finding the operation of air dampers puzzling.
The air dampers have an air cylinder on them which is spring loaded to keep them open. Even in the absence of air pressure...they are open.
Da Book only pays lip service to the dampers in that it says the purpose of them is to close when the engine is cold, like before startup, and during startup to restrict the flow of air over the radiators (MCI) and facilitate fast warmup.
I could understand this if the spring in the cylinders would force the dampers closed and when the shutterstat allows air to flow to open the shutters it would also open the dampers for max air flow.
Could it be that at some time, someone has disassembled the air cylinders for the dampers and reversed the springs?
It's not keeping me awake at night but I feel that if the Engineers who designed this cooling system felt the need for the dampers, in addition to the shutterstats, they must have had something in mind where they'd close when the engine is cold.
Might I have the cart before the horse here? I sure wish someone would explain this to me.
Inquiring minds want to know!
NCbo |
Ron Walker (Prevost82)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, May 30, 2006 - 7:01 pm: | |
Bob ...you want the air cylinder to be normally open or extended, with no air pressure...it's a safety thing. If it was the opposite way, and the stat failed to open - to air up the cylinder - to open the stutters, then you would over heat the engine. The way it’s setup now the stutters are normally open and the stat can fail without the engine over heating |
|