1993 Ford Tempo croaking-roaring circular sound at idle and

Tiny
DANNYR2009
  • MEMBER
  • 1993 FORD TEMPO
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 160,000 MILES
Hello all,

Recently I am having a new sound when my car is running. The sound comes more on the side of the passenger at it's close to the firewall because I can hear it more inside the car than outside. If I want to hear it okay, I need to lift the hood. Under the hood the sound comes in the direction of the serpentine belt.

Another thing: Sometimes my car shakes, vibrate when the transmission is on drive and the car is not moving, if I push the gas, the vibration goes away. If I put the car in neutral, the vibration stops also. Only when the car do not move and it's on drive.

I have changed all mounts, which includes engine and transmission mounts, is it possible that the trans mount is stiffer which explain that vibration or could be linked to an incoming timing belt failure?

Thanks for your time and help people,

Danny
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Sunday, October 18th, 2009 AT 10:35 PM

3 Replies

Tiny
MHPAUTOS
  • EXPERT
Hi there,

the noise may be a belt pulley bearing, or even the alternator, these can be check by a mechanic, the vibration at idle in drive sounds like incorrect base idle speed setting, get this check as well.

Mark (mhpautos)
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Monday, October 19th, 2009 AT 5:10 AM
Tiny
FIXITMR
  • MEMBER
Your car has no timing belt. The noise could be a failing water pump(closest to firewall), or it's idler/adjuster pulley or the belt itself. It's a very thin belt not easily seen. Your harmonic balancer pulley on crank could also be failing(rubber insulation fails causing noise). Your air conditioning pump bearings, power steering pump, alternator, or the serpentine belt idler pulley could also account for the noise. Take a section of sweeper pipe/wand and hold to your ear while pointing around under hood to locate source of noise. You can also get a auto stethoscope from harbor freight tools cheap and that is more accurate at pinpointing noise. Have fun, good luck.
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Saturday, October 24th, 2009 AT 2:52 AM
Tiny
DANNYR2009
  • MEMBER
Thanks for your reply fixitmr !

Alright, I guess it's a good thing that my car doesn't have a timing belt, so it must have a timing chain.

I changed the waterpump last year so I guess it's not it.

I will check with the method you described the idle pulley, adjuster.

About 2-3 years ago, the crankshaft pulley have been changed, at that time it was doing major noise, steel on stell type of noise, worst when it was idle. After the fix, the noise didn't come back. So I guess it's not the crankshaft pulley.

I will check the A, C compresser.I serviced it this summer, they added some gas in it and I have read that putting the new gas in older ac system could damage the compresser.I might experience that.

Powersteering pump is another thought. It has been leaking for years now. Adding fluid when needed.

Okay so I have an idea where to look at, thanks for your help and will tell how it goes,

Thanks again !

Dan
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Monday, November 9th, 2009 AT 2:30 PM

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