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.

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
  • Home
  • Questions
  • 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.

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: Double back doors not opening

This can happen where the rear doors appear to be locked and will not open. The inner carpeted panel will need to be removed on the passenger barn door and the actuator rod which connects to the outer handle will...

Q: Camaro iroc z sat for 17 years... Won't start

The fuel in the tank is bad from sitting so long. The entire fuel system may need to be flushed and the carburetor rebuilt. This means that the fuel tank should be removed and cleaned. The fuel pump should also...

Q: Driving normal and my brakes start act up first noticed pull to passenger side then petal travels farther than normal

There are several possible causes for the brakes to pull to one side when applied. This could be caused by a sticking caliper, brake line leaking, compromised brake hose, a low tire pressure, a failed suspension component, a faulty master...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
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...