Question about Lexus RX 300

1 Answer

How can you tell if you have a bad pulley ? What causes a new belt to get loose? I have already had it tightened twice.

Posted by on

Ad

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Lexus Master
  • 6,927 Answers

A lot of the time it is the belt,gates are a little high in cost,but they are the best,and yes,it still can be the pulley,,and it is hard to tell if is bad.

Posted on Jul 18, 2010

Testimonial: "Very attentive,knowledgeable.Thank you so much."

  • 3 more comments 
  • ajones418 Jul 18, 2010

    Roniecon, What about the air compressor ? can a bad compressor still blow cold air? and can it be the cause of the belt becomming loose. It seem that everything is okay till i turn my air on.?/

  • ajones418 Jul 18, 2010

    Also what are gates,A brand of belt

  • Ronny Bennett Sr.
    Ronny Bennett Sr. Jul 18, 2010

    Yes,it is possible,or the belt may not be tight enough,the belt,if it is adjustable,needs to be good and tight to work on the ac ,and yes,gates is a brand,and napa sells gates with there name on them.If the belts is squealing ,then the compressor can be bad,or the ac belt is not tight enough.

  • ajones418 Jul 18, 2010

    I've had the belt tightened twice and they are new belts, and it seems to run fine until I turn on the A/C...and when I turn the AC on the belt becomes loose, the battery light comes on, today the battery lost power. My dad said it must be a bad belt because I wouldn't be blowing cold air if it were a bad compressor. Is this correct? Thank you so much for your help and knowledge.

  • Ronny Bennett Sr.
    Ronny Bennett Sr. Jul 18, 2010

    It is most likely the truth,but the belt needs to be really tight,it has got to be slipping.But have you had freon added?If not,have a set of ac gauges put on it,just to make sure the head pressure is not getting too high,,and make sure the cooling fans are coming on when the ac is turned on,if they are not,then this would explain the problem.

×

Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Good luck!

Posted on Jan 02, 2017

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

2 Answers

My crank pulley is loose on 2009 jeep Cherokee how do I tighten


There is one bolt in center of pulley/harmonic balancer. Sounds like the harmonic balancer has started going bad..if bolt in center of pulley is loose...which is fairly uncommon tighten which you just tighten Iike any other bolt. If it is tight then you will need the replacement. Replacement is a good bit more involved. Radiator has to be removed, special tool, harmonic balancer pulley remover is required..it will remove pulley. Then you line up pulley with keyway..tap on with rubber hammer until pulley is on far enough for bolt to be started..tighten the bolt and it pulls the pulley all the way into place.

Sep 22, 2015 | Jeep Cars & Trucks

1 Answer

Ive just changed all three belts on my Mitsubishi challenger 99 and the the alternator/pulley/harmonic balance belt is sqealing its head off..(process of elimination..spray pulley with lubrication s


Belt squealing is ALWAYS and ONLY loose and possibly damp / wet belts
Try checking the tension on the belts and tighten if necessary.
If you have recently worked on the car, then you may have not tightened nuts bolts to correct Torque and they have become loose causing loss of tension in the belts.

You should NEVER spray anything on the belts. !!!! The chemicals can weaken them and they will be more likely to slip in the future.

Sep 11, 2014 | Cars & Trucks

1 Answer

Ok,so my car already tore 4 serpentine belts in 2 months,,,they changed the belt tensioner already and the idle pulley,and still not working what could be the problem?


check to see that all bolts along the line of the belt are tightened, the biggest cause of torn belts are bolts that have worked their way loose and as the vehicle vibrates, they slide outward and rub on the belt, when the belt is removed, check each pulley for free play, they should all turn with ease, with the car running, have someone turn on the ac, make sure that the clutch engages and that its not binding, or causing the belt to bounce or skip when its on. check to see that the alignment of the belt fits PERFECTLY in line ,, if one pulley is off just a fraction of an inch it will begin to tear the belt, and at 3300 RPM's, that doesn't take long to rip to pieces.

Sep 18, 2011 | Ford Taurus Cars & Trucks

2 Answers

What does it mean when the serpentine belt whistles?


Serpentine belts are a great invention but unfortunately they drive everything on a modern engine which places a lot of load on them. When your belt displays any of the following:
-squeals when accelerating.
-chirps constantly
-squeals constantly
-squeals when wet or moist outside
-squeals when cold
-or any combination of the above.

The belt must be replaced, but wait... If you replace the belt it may stop for a while but then the noise comes back. This is because the old belt was slipping and has polished the pulleys or "glazed" them. So before you replace that noisy belt scrub all of the pulleys well with a scotch brite pad, or a good wire brush to remove the glaze and rough up the surface. Clean them off with brake cleaner afterward. Belts work by friction so if the surface is polished too much the belt will slip. If you have already put on a new belt and it is making noise, -sorry you must buy a new one again. Slipping on the pulleys will glaze a new belt fast which ruins it. Some people say you can apply brake cleaner etc to a new belt to fix it but that may not work well. If it slips it will just mess up your newly cleaned pulleys and you will have to scrub them up all over again. So do the job right and rough up the pulleys AND replace the belt at the same time.

There are a few other things that can cause serpentine belt noise tho so before you replace the belt check the following:
-The bearings in the tensioner and idler pulleys can go bad. To test this put some chalk or whiteout on the edge of those pulleys so it makes a bright "flash" you can see when it rotates. If the chirp is in time with the flash on one of the pulleys most likely you have a bad bearing in that pulley. Sometimes if you have the right tools you can press in a new bearing. Other times you need to get a new assembly. Other accessories can have bad bearings also so you may need to mark and watch them also. WARNING: Never stand in line with a moving belt or fan. If it comes apart etc it could cause severe injury.
-The tensioner can loose it's tension which will cause the belts to slip. If it is easy to move the tensioner then it needs to be replaced and the pulleys cleaned and belt replaced.
-The belt can become delaminated and part of the outer fabric cover can come loose which will "flap" when it hits parts of the engine making a noise. If you hear this tick tick tick noise and it seems to be in time with that printing on the belt then this may be the problem. Always install a serpentine belt so that the cover splice is pushed down by the motion of the belt rather than being peeled upward.
-The belt can crack or delaminate and sections of the inner VVVVV surface may break off and cause mysterious noises. If you see cracks in the inner surface replace the belt.

-Hope this helps

May 26, 2011 | 2006 Hyundai Sonata

3 Answers

When I raise the hood and with motor running looking to my left there is a belt running and a squeaking noise at idle coming from that area. The van is front wheel drive so motor sits in there sideways.


Has it just started with cold weather? Does it squeal at first then as the engine is revved, stop squealing.

If so its probably your alternator belt has worked loose and needs tightening. I'd check this out first, if you've not done it before ask a friend with some know how for guidance. But as a guide, there should be about an inch of give when flexed on the longest run between 2 pulleys, if more then probably needs tightening. If more than a couple of years old, replace with a new one.

If it still squeals after tightening/replacing, you could have a faulty water pump bearing or pulley bearing. Either would require replacement to pre-empt catastrophic failure and resultant engine damage.

Dec 20, 2010 | 1998 Oldsmobile Silhouette

1 Answer

Getting a 'squealing' noise from the engine all the time. What is the cause likely to be??


Depending on the model it could be a belt alignment problem, loose belt or bad bearing in a pulley. If the squeal gets louder if you spray water in the area of the pulley it is most likely a loose belt. I would start by looking at the belt itself first then spray WD-40 in the bearing area of the Idler pulley and tensioning pulley. If the WD-40 works the problem is a bad bearing. Otherwise it is again, most likely, a loose belt. As a final check you can spray belt dressing on the belt and if the squeal goes away then it is your belt being loose. This could be caused by a belt being stretched over time or a tensioner not working correctly due to a weak spring, if equipped with spring loaded tensioner. If it doesn't have a spring loaded tensioner then you may just need to tighten the belt by adjusting it.

Oct 12, 2010 | Chrysler Voyager Cars & Trucks

3 Answers

There is a belt noise when car starts then it goes away after few minutes. Why is that?


If it is a belt noise, it because of the slippage between the belt & pulleys. Try replacing with new belts

May 15, 2010 | Cars & Trucks

1 Answer

1992 Pickup: loud squelling sound under hood when started...


Sounds like a loose belt.

There are a few things that can cause a belt to slip like that.

The belt could be not tightened all the way. If it uses a sepentine belt with a tensioner, the tensioner could be bad. If it is not a serpentine belt, then you will have multiple belts and the one that is making the noise can be loose. Use something to pry it tight and tighten down the bolts holding the component th belt goes to.

It can also be a bad pulley. Pulleys have bearings inside of them, at times the bearings will go out and make the pulley hard to turn. You can usually find this easily by taking the belt off and turning the pulley with your hand. If it is hard to turn or makes a grinding noise when turned...it is bad and needs to be replaced.

Old belts can also cause this along with a belt that is wet. There is a spray on Belt Dressing that helps get rid of noisy belts, but I consider that a bandaid to a bigger problem.

May 03, 2010 | Toyota Cars & Trucks

2 Answers

What would make your jeep squeal is it a belt or fan or pulley 1993 jeep cherokee larado


most likely a worn idler pulley or a part that has a bad bearing or going bad.

Sep 24, 2009 | 1994 Jeep Grand Cherokee

1 Answer

Timing belt and pulley


1.Your engine has an internal timing chain, not a belt.
Therefore I'm going to assume that you mean the serpentine drive belt.
Common causes for belt to fail is either a mis-aligned or damaged pulley, improper belt tension, or bad tensioner spring (if equipped with spring loaded tensioner) You mentioned a loose pulley but didn't say which one! That's what I'd look at first! Also, make sure that all pulleys have no "wobble" indicating a bad pulley bearing Most common: water pump or idler pulley.

Dec 30, 2008 | 1999 Jeep Cherokee

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

174 people viewed this question

Ask a Question

Usually answered in minutes!

Top Lexus Experts

yadayada
yadayada

Level 3 Expert

79123 Answers

ROBERT GARCIA
ROBERT GARCIA

Level 3 Expert

918 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22326 Answers

Are you a Lexus Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...