Question about 2003 Toyota 4Runner

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Is there a Belt Tension adjustor on a 2003 4runner 4.0L V6 When its cold it speaks so bad and the belt is only 2 years old

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Ok, to answer your question yes and no. There is an auto tenssioner that constantly adjusts to the pull of the belt. The squeal you are hearing is due to a pulley that is not spinning the way it is supposed to, normally the idle pulley is the culprit. While it could be any pulley, the idle pulley is the one that normally has the bearings worn down the fastest. This can cause the belt to stretch out prematurely, which the tenssioner normally takes care of.

Posted on Oct 06, 2009


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2 Answers

Why does my water pump belt on my 2001 Suzuki Grand Vitara keep shredding

You may have a pulley out of alignment or a bearing that is bad on one device or the idler or tensioner pulley.

Jan 14, 2016 | 2001 Suzuki Grand Vitara

2 Answers

I just replaced the alternator belt on my 96 Isuzu trooper and after tightening everything and starting the engine ,neither the fan nor the alternator will turn unless I do so by hand

did belt fall of first or you took it off. first.???????????????????????????????
no engine size stated 2.8L or 3.1L Usa.
belts vary by engine,
belt mis-routed,did you make a drawing before starting.oops
or you set the tension wrong? read the book or guess?
or the auto tensionor is bad. (we always check this 1st.

now i read your fsm book on serp belt.
its a serp right>?

"some of the V6 engines are equipped with a serpentine belt and automatic belt tensioner. The tension is maintained by a spring loaded pulley/tensioner. The indicator mark on the moveable portion of the tensioner must be within the limits of the slotted area on the stationary portion of the tensioner. Any reading outside the limits indicates either a defective belt or wrong SIZE belt or bad tensioner."

question 3
did you take old belt and match it side to side
with the old, and are same size.
if not FAIL.
assumes old belt not lost or run to total destruction. (im blind tell me)
q4: did you put a a/c belt on a non a/c cars
see dotted line below, that be 2 type belts.


Jan 14, 2016 | Isuzu Cars & Trucks

1 Answer

Change a serpentine belt

your car is LC , a land cruiser and not a COROLLA.
(J120: 2002-2009) so that makes it real hard to answer, huh?
no year stated,

no displacement stated.(engine)
4.0 L petrol V6???????? 1GR-FE????
3.4 L 5VZ V6 (petrol) ????????????
1GR-FE V6 is available
the series 120 had 7 engines offered and 2 V6

not even a clue. (find the real name of the engine and finding
help is 10x better and so is parts.)

accessories? belt, not cam
it's in the FSM and at maybe at login and read.
there are only 2 kinds , you set tension and autotensioners.
so we look first, which kind.
the first step is gaining access. some cars are horrid this way
like FWD.

here is generic.
1: make a drawing of YOUR belt routing, first.
if reUSING old belt mark belt with a direction arrow now. @!!!
2: gain access to belt (no comment, no year, or engine stated.)
3: relax tensioner. (either kind)
4: remove belt
5: but new one back (if old see arrow above)
6: reset tensioner. or set to spec tension, (auto , or manual)
7: start engine , make sure belt runs true, if not, fix that. now.

RTM , read the FSM , RTM at (USA cars)

THE LC, is one of the cars that has the largest numbers of
engines used of any car on earth.
over 12.

which engine, learn to find what engine is in your car.
or get the wrong parts every time and 100% bad advice.

most online sources of information are bad for LC
due to the huge engine selections.'
they mix facts or skip engines.
get a real FSM>? from TOY.

if your engine has a manual tensioner , you will need the spec
tension (pounds), (some are very high set) and the tool to set it.

Feb 21, 2014 | Toyota Corolla Cars & Trucks

1 Answer

I'm replacing the serpentine belt on a 2001 cherokee sport 4.0 and the belt tension adjustor does not seem to be loosening. got the old one off, but cannot get the new belt back on.

It will be necessary to undo the pulley nut first as the adjuster bolt has to be able to move the pulley spindle and the nut is what locks it in place to take the load off the little adjusting bolt.

Dec 26, 2013 | 2001 Jeep Cherokee

2 Answers

Need to put belts on a 1980 chevy 350 eng, this not a votex, it has ac ps and smog pump

Buy a Haynes Manual for around $30 from an auto parts store. It is by make and model/year, this has all of the diagrams you need for your vehicle. Good investment.

Nov 10, 2013 | Cars & Trucks

2 Answers

How do i adjust a serpentine belt on a 96 jeep cherokee

You don't. If the belt looks frayed or otherwise damaged you replace it. There is however a belt tensioner which kind of automatically applies tension to the belt which removes the need to adjust belts like the old v belts with the adjustor brackets. You shouldn't have more than 1/2 to 1" or belt play otherwise if so your tensioner may be going out and need to be replaced.

Dec 09, 2010 | 1996 Jeep Grand Cherokee

1 Answer

The belt rides of the tension pully. Why? the pullies are not all in line. Is there a spring inside the tension pully & how do I get at it?

regardless of the v6 engine u have the belt tenioners r phenominal about going bad in mostly 2 ways one way is not retracting or bouncing back and second is they dont stay aligned when it is pulled down from excellerating and it throws the belt.

Oct 04, 2010 | 2000 Dodge Caravan

3 Answers

Belt? squeals when cold. it goes away once it warms up. how do I tell if its the belt or water pump bearing?

Spray the belt with wd40 if it goes quiet then it will be the belt, It may just need to be tightened as they often do after a cold spell, the metal contracts are expands in cold/hot climates.

Have the car running and spray directly onto the altenator and the belt.

If it is still squelling then get the pump checked out.

Hope this helps

Feb 21, 2010 | 1991 Chevrolet Cavalier

2 Answers

97 Lexus Es300 noise under the hood by alternator

mcdevito75 here, If you have 1 continuous belt on the engine (serpentine) then the belt could be worn or the tension pully holding the belt tight could be going bad. No noise in Neautral or Park as increased engine speed in these gears over rides the worn part and thus no noise. On a cold engine examine the belt, look for frays / wear from where the belt rides the pullys. If the belt is 2 years old, Change it.

Jun 06, 2009 | 1999 Lexus ES 300

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