Skip the auto shop - Our mechanics make house calls

Q: There's no milky residue on my oil cap or my dipstick but there's oil in my radiator I know I have a bad spark plug wire.

asked by on

If I had a bad spark plug wire would that put oil in my radiator

My car has 203700 miles.
My car has a manual transmission.

A: Hi there. A bad spark plug wire would not a...

Hi there. A bad spark plug wire would not allow engine oil into the cooling system. The possibility of a bad head gasket, could allow engine oil into the cooling system. Assuming the engine has not been overheated, electrolysis could have created a head gasket issue. Have not found any information indicating your engine was equipped with an oil cooler. The cooling system contamination should be properly diagnosed to avoid unnecessary repairs. I recommend having your vehicle’s bad spark plug wire and oil in the radiator be diagnosed and repaired by a certified technician, such as one from YourMechanic.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

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: How do I turn on the infotainment system?

The infotainment system offers a lot of great and fun features to drivers and passengers. To turn on the system, press the VOL button on the left side of the controls.

Q: The car will crank but will not start - 1994 Chevrolet Camaro

Hello and good work isolating the problem to the fuel supply. Next thing to do is check is for any problem codes remaining, whether Check Engine is illuminated or not. Do you hear the fuel pump running with the key...

Q: Rack and pinion has been replaced three times in three months

Without knowing the specifics, it's hard to say who or what is responsible. I can say that there are some parts rebuilders out there that are turning out some badly inferior products and selling them for very tempting prices. You...

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...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
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...