Q: How to change sparkplugs? 1997 Cadillac Eldorado

asked by on

How do you change the plugs on this car. What can i do if the plugs are rusted , and wont break free. I see i can move the coil pack to get to rear plugs

My car has 140000 miles.
My car has an automatic transmission.

Hi there - your first move would be to carefully sketch or cellphone camera record each coil position, then removed the coil packs. Using a spray tube, hose down the spark plugs with rust penetrant (WD-40, PB Blaster or similar), then go to the beach for a week. Seriously! Then carefully use a spark plug socket, and attempt to unscrew each plug. A 3/8" electric impact tool is an excellent way to remove these (no air wrenches!) - small shocks to break the plugs loose without stripping the threads. Waiting for the penetrant to do it’s work is key here! If you strip the threads, a thread insert repair will be necessary (aluminum heads for the Northstar V8s). For professional assistance, I recommend spark plug replacement performed by a mobile, professional mechanic, such as one from YourMechanic, who will come to your location, and make this repair for you.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. How to change sparkplugs? 1997 Cadillac Eldorado

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Car giving warning messages.

The "Check Coolant Level" set when the engine coolant falls below the minimum level. This generally occurs with normal vehicle use if the coolant has not been checked in a long time. If this is a recurring message then a...

Q: Direly need advise on what to do here.

The problem you have with the cars engine and transmission will far exceed the costs to repair it and will not be worth the money to do any of the repairs. If you want to fix the head gasket leak...

Q: Q: Spark plug popped-out

It is common on this engine for the spark plugs to pop, and there are two typical fixes: either the spark plug hole could have a new insert put into it, or the head will have to be replaced. I...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.