Q: Bypassing oil cooler

asked by on

So my frontier had a problem where oil was getting into the cooling system. We took it to the mechanic and found out it was the engine cooler causing the problem. So we got a new oil cooler and the whole cooling system was flushed. The same problem occurred about a month later and this time the car actually overheated because of the amount of gunk build up from the oil . So now we are faced with the possibility that the head could be cracked or the oile cooler went bad again. We also know that you can damage the oil cooler by tightening it too much which we think the mechanic did . So we decided to bypass the oil cooler, completely flush the cooling system and drive it for a few days so that we know for a fact that it could be the head if we see oil come up in the radiator again. Do you think that it is a good idea to bypass the oil cooler? We drive the car very light and don't drive long distances. I just don't want to take the head off unnecessarily
My car has a manual transmission.

The only way to determine if your operating conditions permit bypass of an OEM engine oil cooler is to install an oil temperature gauge. If gauge readings are always below 240 degrees F. (but above 212 degrees F.) you do not need a cooler. You can always bypass an OEM oil cooling system and install an aftermarket system but in your circumstances if it is properly installed, the OEM system is fine. Overheating can damage the cooling system thermostat so be mindful of that going forward as a damaged thermostat will create new problems. Transmission oil coolers can leak into the coolant, too, so be sure that is not the issue. If you want the situation investigated and learn of what, if any, repairs are needed, the recommended service to request is an oil leak diagnostic. If you request that service, the responding certified mechanic will get this taken care of for you. If you have further questions or concerns, do not hesitate to re-contact YourMechanic because we want you to make the most of your repair dollars and help you to get the best possible results.

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. Bypassing oil cooler

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: My 2000 nissan frontier hesitate on shifting , and stays with running with my foot off clutch in first gear

Hi there. On a manual transmission, most shifting problems are caused by a clutch failure or a gear failure. This is rather common for a vehicle that is more than 15-years old and over 250,000 miles. Trying to pinpoint the...

Q: Q: Truck will turn over but won't start

There can be several reasons why your vehicle will not start and quite a few of these reasons can duplicate a lack of fuel. The first thing to check is the fuses and relays for the fuel pump circuit. When...

Q: Saturn Ion wont change to 4th gear, its an automatic. The P0700 code comes up saying transaxal module. What does this means?

Hello. The code means there is either an electrical or mechanical (hydraulic) fault in the transmission, or the transmission "controls" and in your case that fault is causing your transmission not to shift. The fault itself can range from the...

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...
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...