Skip the auto shop - Our mechanics make house calls

Q: My car engine starting time with a little bit of noise sounds like it came from crankcase. What's the best thing I can do to check?

asked by on

hello..i have problem with my car its hundai terracan 2004 model,when i start the engine i feel sounds from somwhere little bit noisy,as i check the engine look like sound of fan came from crankcase rather engine also one thing if i reach 150rpm car is wild looks like angry.,can you please help me to find and solve this solution,thanks and advance,more power!!!!

My car has 236000 miles.
My car has an automatic transmission.

A: Hi there. This sounds like a piston slap so...

Hi there. This sounds like a piston slap sound or a bearing sound. When the engine is cold, the piston skirt will be smaller than the cylinder bore and make the piston slap the cylinder wall until it get hot. The other thing could be a rod bearing that is worn making the bearing have too much clearance until the engine has met its oil pressure. Crank the engine over by hand and try to feel for a hesitation or a binding feeling, but don't get a binding feeling and compression mixed up.

A binding feeling will have a thud and may feel like a slight tap in the turn cycle. If so, then the rod bearings need replaced or the pistons need replaced. If you need further assistance with your vehicle, then seek out a professional, such as one from YourMechanic, to help diagnose and resolve the noise on start up.

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!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: passlock problem

Hi and thanks for contacting YourMechanic. If you are referring to the key to the vehicle then check to see if the key you have is the right key for your vehicle. If you have the right key, then do...

Q: My car had a hard time starting. 2008 Suzuki SX4

Hello. Depending on how hard the starting was would help me to determine what is going on. If the engine just had a hard time cranking then it may be a problem with the battery or the starter. It may...

Q: What is the recommended tire press pressure?

The ideal tire pressure for your car is located on the tire and loading information label. This label is placed next to the driver’s door latch, and can be viewed when the driver’s door is open.

Related articles

How to Renew Your Car Registration in Oklahoma(DELETED)
Having your car registered with the Oklahoma Tax Commission is an important part of driving legally in this state. You will need to do this within 30 days of moving to Oklahoma...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
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.