Q: I have white powder substance on metal parts of my engine on my 13 Toyota Sienna, 54,000 miles. Should I worry about corrosion?

asked by on

Recently purchased a used Sienna that is in great shape. It drives well. However, there is a white powder substance on the metal parts of engine. Is this a cause for concern?

My car has 54000 miles.
My car has an automatic transmission.

If the material (the white powder substance) is observed on aluminum parts, that just surface corrosion of the aluminum. The surface aluminum has oxidized and produced aluminum oxide (a white powder). This kind of superficial corrosion is meaningless insofar as any possible negative effects on the car. In terms of corrosion on a car, a principal concern is fuel and brake lines mounted to the underbody. Usually, components under the hood are well protected and any moisture that is there evaporates due to the heat (moisture greatly accelerates corrosion). If corrosion is a concern, the real issues are typically beneath the car and, again, fuel and brake lines are the principal concern. Typically, after 15-20 years, unless the car has been operated only in the desert, all of those lines beneath the car will have to be replaced. If you have further questions or concerns, please do not hesitate to re-contact YourMechanic as we are always here to help you.

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. I have white powder substance on metal parts of my engine on my 13 Toyota Sienna, 54,000 miles. Should I worry about corrosion?

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: why is all of a sudden the power steering keeps leaking after being fixed? it happening again (4th time) causing PS failure.

Hi there. Have any other leaks been identified? Has the same part failed? If the hose is repeatedly failing, I would suggest using a factory part. Were the o rings/gaskets replaced that pertain to the hose? Has the steering system...

Q: Burning oil from engine and breathing the fumes within the vehicle

Hi Larry. Thanks for writing in to YourMechanic.com. Anytime you smell oil inside the cab of your vehicle it is a potential safety issue which should be addressed sooner rather than later. In some cases, the smell of oil is...

Q: Q: Battery not keeping charge

First, the battery and charging system would need to be checked again. The battery wiring from the battery needs to be checked all the way to, and from, the battery, starter, alternator, and fuse panel to look for corroded splices...

Related articles

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...
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...