In order to change the torque converter on a Chevy Celebrity you have to take the transaxle out of the car. I would suggest that you consult either a Chilton or Haynes manual for specific instructions and illustrations that would lead you through the process of removing the transaxle.
These are typically easy to changed first take off the pulley then you will have access to the bolts they behind the pulley
The simple reality is, it's either leaking or burning. If you can't find a leak, it's burning at a slow enough rate that the catalytic converter is burning it before it goes out the exhaust as smoke.Note, however, that condition will quickly change once the converter is fouled, then you get to purchase a new engine AND a catalytic converter.
You have to start by taking the fuel tank off - the fuel pump is located in the fuel tank on any fuel injected vehicle. You might check the rear seat, just in case there is an access hole to get into the fuel tank.
You don't have to change or remove the converter unless the converter is stopped up.
To replace the spark plugs on your Celebrity requires a 5/8" spark plug socket, short extension and either a ratchet or breaker bar. First remove the spark plug wire then use the socket to remove the spark plug. The spark plugs should have a .045" gap. Replace the spark plug and reattach the wire. Continue until you have replace all of the spark plugs.
With a video converter.
No Chevy Celebrity ever had a 4.0L engine
Only if it is not working.
why do toyota sienna transmission leaking after change a new transmission and ran 5000 miles?
There was no 1975 Chevrolet Celebrity made. What year do you actually have and which engine does it have?
With a converter.
A Catalytic Converter can fail if it becomes clogged or poisoned but there is no way of knowing when it is clogged. Replace your Catalytic Converter when it starts to malfunction.