Not cheap nor easily...The engine is not the only thing which is required to be swapped out. Mounts, harness, ECU etc differ.
If you do not have any problems with plugs, change them when you replace the timing belt (do not forget to replace the spark plug wires too).
It is important to replace old spark plugs to keep a car engine running well. To replace them disconnect the battery, remove the cables, remove the old spark plugs, replace with the new spark plugs, replace the cables in the correct order, and connect the battery.
WHILE THE MOTOR IS WARM . OR TRADE IT OFF AN SAVE THE TROUBLE
No.
if you cant get at your spark plugs the best way is to take the side and front motor mounts out and let the motor down they will be easy to get at make sure you have a jack under the motor comes out like butter
Replace spark plugs and wires Replace fuel and air filters Replace PCV valve
What size motor? no matter, do it while it's cold.
Replace the spark plugs and plug wires.
Yes, I'm getting no spark on my roto tiller which is a Sears Brand with a Briggs/Straton motor. Does the machine have a magneedle and would that effect the spark?
I own a 1994 Bonneville and replacing the back spark plugs was not too bad, there is enough room and with a socket extension you will have no trouble.
Re: How often do you change your spark plugs? Replace every 6 months. Run Sea foam through the motor before you replace them. I clean and re-use plugs once and then dump them.
The 5.7 in your Cadillac is a Chevrolet LT1. The same motor that came in an Impala SS and Buick Roadmaster. It uses an "OPTI SPARK" distributor that runs off the front of the motor. There is no timing adjustment that can be made with the unit. The engine management computer controls the timing and adjusts the spark as ou drive. If you are having timing problems, the OPTI SPARK needs to be replaced.