Noise Under The Hood

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wshadow34606

New Member

Jul 12, 2011

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Jul 12, 2011

#1

• Jul 12, 2011

• #1

Hey Guys, i have a question to ask. i have a built 2001 Mustang GT. My car drives great but every time i drive the car, 20 to 30 min later there is a rattle noise every time i hit the gas, so i have to drive in 3rd gear really slow until i get home. i am not to familiar with lifter noise, etc. i have racing cams. If anyone could help me that would be great, i live in spring hill, Florida. I Took the driver side valve cover off and the lifters are right there, they seem fine to me but like i said, maybe i can not tell by looking at them

 

Maxpowers

Member

Sep 9, 2009

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Pittsburgh, Pa

Jul 12, 2011

#2

• Jul 12, 2011

• #2

Does speed change the noise? Engine rpm? Throttle position?

What exactly do you mean by built and how long since the engine build?

 

trombonedemon

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Jun 25, 2009

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Jul 12, 2011

#3

• Jul 12, 2011

• #3

If you have a built engine, as in forged piston heads; from my research a forged pistons make a bit of noise compared to the high silicon based pistons that come stock.
Yeah, what Max says, need MORE info.

 

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wshadow34606

New Member

Jul 12, 2011

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Jul 13, 2011

#4

• Jul 13, 2011

• #4

what i mean by built is, it has racing cams, port and polished heads, Aluminum Manifold a bbk Air intake, ect. yes, the noise gets louder when i go fast so when the noise appears i have to go slow and get it home. i built the engine last year, i already made it throw the breaking period. i am kinda thinking its the lifters but not 100% sure...i know its not the pistons or the seals

 

trombonedemon

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Jun 25, 2009

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Jul 13, 2011

#5

• Jul 13, 2011

• #5

wshadow34606 said:

what i mean by built is, it has racing cams, port and polished heads, Aluminum Manifold a bbk Air intake, ect. yes, the noise gets louder when i go fast so when the noise appears i have to go slow and get it home. i built the engine last year, i already made it throw the breaking period. i am kinda thinking its the lifters but not 100% sure...i know its not the pistons or the seals

Click to expand...

You would have to pin point the noise, are you positive the noise is comming from your valve-train. Could be anything from noisy injectors to a loud throw-out bearing. Noise radiates throughout the car fooling the ear.

 

joshjwc9

Active Member

Jun 12, 2006

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Palm Harbor, FL

Jul 13, 2011

#6

• Jul 13, 2011

• #6

Any luck. A noise that increases with engine speed could be valvetrain, TO bearing or internal. It could be the piston kissing the valve or the TO bearing chirping/grinding away.

If you need professional help I have a guy who does all of my labor intensive installs and works only on Mustangs/Fords. He is very knowledgeable and reasonable and his shop is in spring hill.

 

Maxpowers

Member

Sep 9, 2009

859

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Pittsburgh, Pa

Jul 13, 2011

#7

• Jul 13, 2011

• #7

You still didn't answer all the questions. Is it speed related or engine rpm.

Speed only related is obviously not the motor.