Skip the auto shop - Our mechanics make house calls

Q: Does a hybrid engines radiator effect the oil engines cooling system...or could it cause oil engine to sludge up?

asked by on

We have had an ongoing radiator issue with our 2012 Kia optima hybrid. The radiator was repaired when way purchased and now 3yrs and 60,000miles later dealer is saying engine is sluged and it's had nothing to do with the hybrid radiator. Plus the dummy lights have never come on to notify me of an issue nor had the temp gage ever reached the red and dealer mechanics had it 2 times prior to a system failure and changed hybrid oil filter due to a hole in it?

If your radiator was leaking, there are good chances that your engine overheated. Not knowing the vehicle history on the frequency of oil changes can make it difficult to diagnose over the internet. Oil changes should be performed every 3,000 miles like clockwork.

A radiator replacement arises concern as far as sludge. Is the dealer stating that the oil or coolant is sludged? In either case, flushes can be performed by a general repair facility for a low cost. A new radiator will not cause sludging unless you have deeper issues, such as lack of maintenance or deeper engine issues.

On another note, a hole in an oil filter causes additional concern. A proper diagnostic is required. Depending on your exact issue or problem, we will need some more history to help narrow down the problem. We will be gladly help pinpoint the source of this issue and check if your engine is overheated in order to make the necessary repairs to get you going once again.

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

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  1. Home
  2. Questions
  3. Does a hybrid engines radiator effect the oil engines cooling system...or could it cause oil engine to sludge up?

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: Starter or solenoid not working.

If the air filter was even "a little wet", then it's more than likely that a little water made it's way into one or more cylinders and hydro-locked the engine. There is more than likely at least one bent connecting...

Q: Emissions light comes on and goes off.

Hi. Emissions codes and emission problems are sometimes very difficult to diagnosis and pin point what exactly is causing the problem. Because of this it sometimes requires extra labor time to fix the emission problem properly. The good thing about...

Q: Radiator fan not working when a/c is on.

Your vehicle fan is controlled by two different relays in the engine compartment fuse box. One is for low speed and the other is for high speed. The ECM controls both of the relays. The wires to the cooling fan...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...