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engine noise at high speeds
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noisyengine Original Post: Jun 19 '07,  6:25 am           Reply
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Member since: Jun 19, 2007

Post: 134999
engine noise at high speeds

My 2004 Mitsubishi Lancer Sport engine is nice and quiet up to about 40 mph. As the car goes faster the engine noise inside the car becomes louder. The tachometer does not become elevated. No lights go on signalling engine problems. I just had the air filter changed with the oil change. I cannot hear the loud noise outside the car when traveling next to the car. It is only noisy inside the car at highway speeds at cruising speed not at acceleration to a cruising speed. It is so loud it interferes with enjoyment of the radio.

     
pvreditor Posted: Jun 19 '07,  6:45 am           Reply
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moderator in Home & Garden, Cars, Musical Equipment
Post: 135001
RE: engine noise at high speeds

Quote: noisyengine
My 2004 Mitsubishi Lancer Sport engine is nice and quiet up to about 40 mph. As the car goes faster the engine noise inside the car becomes louder. The tachometer does not become elevated. No lights go on signalling engine problems. I just had the air filter changed with the oil change. I cannot hear the loud noise outside the car when traveling next to the car. It is only noisy inside the car at highway speeds at cruising speed not at acceleration to a cruising speed. It is so loud it interferes with enjoyment of the radio.

Are you sure it's engine noise? Normally, engines are loudest during acceleration or driving up a hill, anytime the engine is under heavy load.

It's hard to say without hearing the noise but I would want to rule out a wheel bearing or bad tire. Those are things that would not make a lot of noise as you are accelerating or driving at speeds less than 40 mph, but will make noise at higher speeds. Sometimes they'll make LOTS of noise. Another possibility is if the exhaust system is touching the chassis or body of the car. It might not be touching at slower speeds or under acceleration, but touches at higher speeds. It could also be a bearing in the transmission.

You should find a good mechanic and let him/her drive the car to get an informed opinion. If I had to guess at this distance, I'd say either a wheel bearing or a tire is causing the noise.

--Bob
     
noisyengine Posted: Jun 19 '07,  7:24 am           Reply
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Member since: Jun 19, 2007

Post: 135005
engine noise at high speed

The engine sound is "whooooooo" in a deep voice , in a constant sound not a knocking. No engine lights on. Wouldn't transmission be a reason for the engine light to go on? At first I thought air filter but now that is has been replaced, the sound is still there. The location of the sound is in front center not one of the sides.

Thank you so much for your reply.

     
pvreditor Posted: Jun 19 '07,  8:29 am (Updated: Jun 19 '07,  8:30 am)           Reply
Reviews written: 427
Member since: May 31, 2002

moderator in Home & Garden, Cars, Musical Equipment
Post: 135008
RE: engine noise at high speed

Quote: noisyengine
The engine sound is "whooooooo" in a deep voice , in a constant sound not a knocking. No engine lights on. Wouldn't transmission be a reason for the engine light to go on? At first I thought air filter but now that is has been replaced, the sound is still there. The location of the sound is in front center not one of the sides.

I doubt that a bad bearing in the transmission would trip the "Check Engine" light.

Does the engine run properly? Does it idle smoothly? Does it accelerate smoothly? There could be a leak in the air intake system, between the air filter and throttle body. Air intake systems can make some noise, so check the intake plumbing for a crack between the air filter housing and the point where the air intake attaches to the engine. Make sure all the clamps are in place and properly tightened.

I still think it could be a wheel bearing or a bad tire. Look carefully at your tires to make sure they are not worn down to the wear bars. I had two cars that made a lot of noise at highway speeds. I had visions of expensive bearing replacements but it turned out to be worn tires. If it's a wheel bearing, it will get louder or quieter depending on whether you are turning right or left. If the sound gets better or worse when the car is in a curve, that's a dead giveaway that it's a wheel bearing.

If there was a crack in your exhaust system or exhaust manifold, the noise would be much louder when you accelerate. It would go back to a dull rumble once you're at cruising speed.

One other thing: Check your coolant to make sure it looks clean. Most cars have green coolant that looks a lot like Gatorade. If your coolant has any brown/black globs in it or tan foam, you have a bad head gasket. Get it fixed before you blow the engine. Replacing a head gasket is not cheap but it's MUCH cheaper than replacing the engine.

Good luck!

--Bob
     
mrkstvns Posted: Jul 03 '07,  7:43 pm           Reply
Reviews written: 1798
Member since: Sep 9, 1999

Post: 137857
RE: engine noise at high speed

Quote: pvreditor

One other thing: Check your coolant to make sure it looks clean. Most cars have green coolant that looks a lot like Gatorade. If your coolant has any brown/black globs in it or tan foam, you have a bad head gasket. Get it fixed before you blow the engine. Replacing a head gasket is not cheap but it's MUCH cheaper than replacing the engine.


Had a blown gasket in a Mustang once. I discovered the tan foam not in the coolant, but by pulling out the dipstick. It was COATED in a goopy tan mess. YUCK!

M
     
nitin25 Posted: Jan 13 '08,  6:33 pm           Reply
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Member since: Jan 13, 2008

Post: 168226
RE: engine noise at high speeds

hi - i am also facing this same issue in altima.
engine is nice and quiet up to about 40 mph. As the car goes faster the engine "humming" noise inside the car becomes louder(noise is very much related to rotation of some part - be it from wheel, engine motor)

noisyengine => can you pls reply to this post? Any suggestions if you got issue resolved.

thanks.

     
pvreditor Posted: Jan 14 '08,  7:44 am (Updated: Jan 15 '08,  5:58 am)           Reply
Reviews written: 427
Member since: May 31, 2002

moderator in Home & Garden, Cars, Musical Equipment
Post: 168260
RE: engine noise at high speeds

Quote: nitin25
hi - i am also facing this same issue in altima.
engine is nice and quiet up to about 40 mph. As the car goes faster the engine "humming" noise inside the car becomes louder(noise is very much related to rotation of some part - be it from wheel, engine motor)

noisyengine => can you pls reply to this post? Any suggestions if you got issue resolved.

I can't help you get a response from noisyengine but do have a suggestion or two.

Try coasting down a hill and shift into neutral. Let the engine fall to idle speed. Do you still get the noise? If so, it's probably either worn tires or a bad wheel bearing -- it can be hard to tell the difference just by the sound.

If the noise is a lot louder going uphill than downhill, there is probably a leak in your exhaust system.

If the noise goes away when you coast downhill, my first guess would be the water pump. If you need to replace the water pump, plan on replacing the timing belt too.

Those are just some thoughts... good luck!

--Bob
     
vintageguy Posted: Oct 19 '10,  11:30 pm           Reply
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Member since: Oct 15, 2010

Post: 264718
RE: engine noise at high speed

Quote: mrkstvns
Had a blown gasket in a Mustang once. I discovered the tan foam not in the coolant, but by pulling out the dipstick. It was COATED in a goopy tan mess. YUCK!

M


Howdy! I have issue about the coolant thingy.. I have been experiencing leakage.. It appears that the coolant is coming from the overflow reservoir. When the coolant get too hot or gases are being passed back though, it's precolating the coolant, resulting in the leak. But I thought it was about the cap.. I already posted a lot today, its just that I needed a lot of help today.. Thanks fellas!
     
dan_grey Posted: Oct 25 '10,  6:45 pm           Reply
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Member since: Oct 15, 2010

Post: 265031
RE: engine noise at high speed

Maybe you need to have it replaced.. I read from one of your post that your from california? them you can check at this Coolant Reservoir Cap.. maybe they can help you too..

     
scmrak Posted: Nov 11 '10,  5:24 am           Reply
Reviews written: 1954
Member since: Sep 27, 2000

Post: 265947
Bump

bump

     
jrpd Posted: Jan 31 '11,  7:33 pm           Reply
Reviews written: 0
Member since: Jan 31, 2011

Post: 271554
humming sound in engine

Ive own my hyundai tucson for little more than 4 years, it has 115000 miles, its a crdi (diesel) and like two weeks ago it started making a humming sound coming from the right engine side, if youre watching from driving seat, it also starts when i pass the 35-40 mph, and the faster i go the louder it sounds, ive tried putting it in neutral to see if it changes but the sound still there, it like if i have and airplane turbine inside the car,ive checked the air pressure in the tires and the tires are almost new(around 4 months use),can anyone help in this issue.

     
pvreditor Posted: Feb 01 '11,  5:11 am (Updated: Feb 01 '11,  5:11 am)           Reply
Reviews written: 427
Member since: May 31, 2002

moderator in Home & Garden, Cars, Musical Equipment
Post: 271566
RE: humming sound in engine

Quote: jrpd
Ive own my hyundai tucson for little more than 4 years, it has 115000 miles, its a crdi (diesel) and like two weeks ago it started making a humming sound coming from the right engine side, if youre watching from driving seat, it also starts when i pass the 35-40 mph, and the faster i go the louder it sounds, ive tried putting it in neutral to see if it changes but the sound still there, it like if i have and airplane turbine inside the car,ive checked the air pressure in the tires and the tires are almost new(around 4 months use),can anyone help in this issue.

The first things I'd check for is a bad tire and a shot wheel bearing. Does the sound change when you go around a curve? If the sound gets either louder or softer around a curve, that's a tip that it's a wheel bearing. (It still could be a wheel bearing if the sound stays the same.) Swap the right-front tire with one of the rears and see if that changes the sound. If the sound doesn't change with the tire swapped, then suspicion falls on the wheel bearing.

Other possibilities include a problem with the brakes on that side (worn pads and/or rotor) and a bad transmission bearing.

Good luck!

--Bob

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