Q: How can you tell if you have an intake manifold leak verses blown head gasket ?

asked by on

We have a 2004 Chevy Silverado it's been leaking coolant it looks from driver side wheel well today I went to check oil and there was no white milky stuff on dipstick but when I removed oil cap there was white milky film

My car has 243000 miles.
My car has an automatic transmission.

Due to condensation within the engine, whitish discoloration on the underside of the oil cap is not unusual. If the oil in the oil pan is not coolant contaminated, you need not worry. If you have an external coolant leak, the source (intake versus head gasket) can be distinguished by pressure testing the coolant system and/or using special UV dyes that are added to the coolant. If you desire that a coolant leak be diagnosed by a certified Mechanic, dispatched by YourMechanic right to your location, please request an engine coolant leak diagnostic and the responding mechanic will get this resolved for you. If you have further questions or concerns, do not hesitate to re-contact YourMechanic.

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 can you tell if you have an intake manifold leak verses blown head gasket ?

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 loud during acceleration

If the engine is making a lot of noise when you accelerate then that can be a sign of engine failure or something that is loose. A description of the noise would help. If it is a banging then it...

Q: Truck would not start this morning. 2011 Chevy Silverado. would not crank and service traction control came on. Help!

Hello, thank you for writing in. If the starter is not attempting to engage and turn over the engine, then you are likely not getting enough power to the starter due to a dead battery. You should try jump-starting the...

Q: Coolant leak at front of engine

Coolant can leak from a variety of places. The only way to be certain is to see exactly where it's coming from. Large leaks are pretty easy to find. Small leaks may require special tools to locate. Some leaks are...

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...
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.
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.