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Loud Screahing When Engine Is Started

shyr33

By shyr33,
in Engines & Forced Induction

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shyr33 Community Regular

shyr33

Posted
Posted

Hey Guys,

There is this loud screaching noise when the car hasnt been started for a few hours or in the morning. Now i know the noise is coming from one of the recently replaced water pump, ac or power steering belts and goes away after a few seconds and stays quiet when im driving. Im thinking the mechanic either didnt tension the belt enough or to much? Or does this usually happen for the first few times with new belts once they are changed. Any feedback is appreciated thanks

femno Grand Master

femno

Posted
Posted

Yeah its a belt. You can also buy a product from CRC i think, its a non slip sticky spray on stuff for belts. But you shouldnt need it. Just tighten them. Thats what i did when i had the exact same prob as you.

shyr33 Community Regular

shyr33

Posted
  • Author
Posted

Thanks for the reply guys, its my regular mechanic so they will no doubt fix it for free i just thought maybe it would go away by itself after a while but looks like ye they didnt tighten it enough.

Thanks again

Duncan Grand Master

Duncan

Posted
Posted

could also be caused by a small person caight in the engine bay. anytime you start the car it hurts so they scream.

That or a loose fan belt....tighten up the alternator adjuster

Taso84 Mentor

Taso84

Posted
Posted

most probable that the belts have been put on too tight. U can adjust the tension in a few minutes with a shifter,

PM me for details on how to do this, I had this problem too when putting new belts on, they usually do it a bit tight to allow for stretching over time

shyr33 Community Regular

shyr33

Posted
  • Author
Posted

Thanks for the feedback guys, i did adjust the alternator adjustment screw a little bit because i thought it was a little loose, then took it back to the mechanics and he said its fine because he didnt want to tighten it to much because it will put to much strain on the water pump and bearing if it was to tight. Maybe some grease or something got onto the belt while it was changed. Ill give it over the weekend to fix itself, if not back to the drawing board on monday i think hrmmm

justin911 Grand Master

justin911

Posted
Posted

ya same, my starter motor used to make a screeching noise only when it was cold. i took her out and slapped some grease in, hasnt done it since.

might even be the starter motor

mine was makn a screachin noise, still havent got it fixed.

  • 4 months later...
Crash. Enthusiast

Crash.

Posted
Posted

hey guys, im having the same issue atm with this. I put some no slip spray on it and this stopped the noise from happening as much, but it only lasted about a week or 2...

can anyone point me in the right direction of what screw i need to tighten, with maybe an image or something? Or where to locate it, any help would be awesome

foznice Veteran

foznice

Posted
Posted

As someone said they stretch over time. So when you first put them on, and adjust them to the right tension, they shoudl be all good, then as they over the next couple of hundred k's, you redadjust them again.

How does grease help the problem? I can see how grease would stop the noise (by lubricating), but I can't see the grease making the belt "grip" the pulley better. Unless it gets absorbed into the rubber over time and moistens it up or something?????? Kind of like, when you drive with wet shoes, it's slippery at first, but after it starts drying out it gets to a REALLY grippy stage....

_x_FiReStOrM_x_ Community Regular

_x_FiReStOrM_x_

Posted
Posted

Avoid using belt grip sprays.. they usually dont do much if anything at all.

If the belt is tensioned enough get a stick of dri-lube, and run it along the belt (carefully!) while the engine is idling until the noise stops.

Even the slightest bit of grease off the mechanics hands, while fitting, is enough to make the belt noisy.

tacker Mentor

tacker

Posted
Posted

If you can twist the belt about 3/4 of a turn is a good place to start and very very small adjustments until it stops making the noise.

Check out what a tight belt will do and i have done a OEM and N1 in the same way.

post-28646-1181502917_thumb.jpg

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