QuestionI need to find the vacuum line schematics for a 1973 Buick centurion, 455-4bbl? and for a 1958 Buick Special 364 V8 can u help me with this?
AnswerOn the 73, the vacuum hose routing should be on a sticker under the hood, usually near the radiator or on the inner fender. I do have this information, but it occupies 10 pages of tiny type in my manual, clearly too much to try to excerpt for you. If you can make your question more specific, I'll try to dig out the answers for you. I will also need to know if the car is a Federal or a California car (they are different!). You, may have an A.I.R. pump, a cold engine lockout system, an evaporator canister, pulse air reactor system, an exhaust back pressure transducer, an EGR valve, a thermostatic controlled air cleaner, a PCV system, a thermo vacuum switch, and a transmission controlled spark system on your car, depending on where it was originally sold, and on the accessories on the car.
In 1958, life was much simpler. There will be a small line from the ported vacuum fitting on the front of the carburetor, that one goes to the distributor, and a line to the power brake from the intake manifold. If you have vacuum wipers, (my sympathy) there will be another line from the booster pump air outlet on the fuel pump to the intake manifold and also from the wiper control switch to vacuum port on the booster pump. There may also be a vaccuum modulator on your transmission to control the kickdown - if your car has this, it will connect directly to the intake manifold, probably at the same fitting used by the power brake unit. Lastly, there will be a PCV valve plumbed into the intake manifold, probably at the base of the carburetor.
I hope this is of some help. Post a "follow up" question with more specific needs and I'll try again.
Dick.
