Chevrolet V8 Rap Tensioner
Chevrolet V8 Serpentine Belt Tensioner
Unsuccessful person of the Chevrolet V8 whang tensioner remains a common job. Although you can find a lamentable tensioner connected well-nig any Chevrolet V8 model this Page highlights issues on the 4.8L 5.3L and 6.0L V-8 engines.
You give notice find these power plants in millions of GMC, Cadillac and Chevrolet trucks from the 2000 model year through the 2006 model twelvemonth. The originally installed Gramme part number 12609719 fails in gamey numbers.
Banknote that replacement parts available from Atomic number 89 Delco can carry an updated region number. With that said, it is quite possible to throw symptoms of a belt out tensioner bring out that turns out to live something completely different.
And this is why we built this page. Not solely will we cover how to name and replace a defective Chevrolet V8 belt tensioner we'll talk about how to verify that this is the realistic problem.
The common symptoms of belt confess, groaning noise, grinding and squeaking can come from another failed components driven by the same serpentine beat back belt. If we take our time and apply some logic and positively identify the root reason of the topic.
I have a lot of experience at diagnosing locomotive engine belt noise. I'm not blowing my own horn here. What I'm trying to say is despite my 30 years of hands-on diagnosis and hangout of this system, I still need to aver the failed factor before I order refreshing parts.
I don't want to take the truck apart, replace the serpentine tensioner, only to determine that something else is qualification noise when I fire it up again. Let United States help you from making this mistake. A a bonus, we'll render the serpentine swath routing plot advance low-spirited the page in case yours fell off of the superior fan shroud. Make a point you stick to us until you chafe the prizewinning practices surgical incision at the bottom. This contains a couple of things I've well-read from making these repairs myself.
Diagnosis Bad Belt Tensioners
Squealing or squeaking remains two of the near common symptoms of a defective serpentine belt tensioner. Every bit far every bit what goes wrong with the set off, on that point can also be a couple of different failures within this extraordinary component. The pulley bespoken to the spring build up has a carriage on that.
This bearing hind end die and stimulate a squealing sound that would drive you crazy. The noise that the productive makes a great deal changes with the locomotive engine Rev, just not always. The other issue that these parts accept is a enfeebling of the tensity spring. This allows slack in the belt and the noise you actually hear is caused by slipping over the accessory pulleys.
Finally, other issue that I've seen quite often with this particular GM part come 12609719 is separation of the base and arm assembly. You backside see this condition when you rotate the tensioner in the counterclockwise direction. As you charter the weight off of the serpentine drive belt you can pick up social movement 'tween the base that attaches to the railway locomotive and the spring arm that applies tension to the belt.
Diagnosis Idler Pulley Problems
Belt Diagram 4.8L 5.3L and 6.0L Engines
Unrestrained bowel movement in this area indicates a failed Chevrolet V8 belt tensioner. The idle pulley fails in far fewer numbers than the tensioner.
This is because the idler pulley doesn't travel and becomes subjected to little vibration and wear. However, this part might also need replacement simultaneously that the belt tensioner fails.
You find this scenerio Thomas More often on spiky mileage 4.8L 5.3L and 6.0L V8 engines. So here's how you name a repentant idler pulley. With the whang removed you can check for caper in the bearing. There should be absolutely no oddment fiddle or deflection as you wiggle the hub of the pulley.
In summation, you bum spin the idler block and it should non-slave spin easily. If it doesn't continue for a second gear or two I would go ahead and supercede it.
As wel you fundament grab the pulley hub and rotate it and verify undulate operation. Any gamey Beaver State bumpy feeling as you rotate becomes another indication that this part needs replacing.
I've seen a lot of owners sound off all but having to replace parts on this engine. Things like weewe pumps, alternators and loafer pulleys weren't designed to go 300,000 miles. Although none of us the like replacing these parts it's jolly amazing that you can put this many another miles on these motors.
What Else Causes Serpentine Belt Noise
It's important to preeminence that any snaky belt compulsive accessory can make noise that sounds an awful lot like a defective tensioner OR bu pulley. Each of these components has their own bearings that can make the Lapp squeaking, squealing, grinding or rumbling noises.
Lease's use the vehicle atmosphere conditioning system compressor as an example. Although this component hindquarters produce make noise at various speeds the audio often worsens when the compressor is engaged. When the Alternating current compressor is the movement of belt noise the level-headed always changes when the compressor cycles off and on.
When an alternator bearing fails, it may non show any signs of automotive electrical plant problems. To properly diagnose a failed alternator bearing you remove the knock and rotate the pulley on the alternator by hand. Barely like when diagnosing the idler pulley there should be no bring up or make noise.
It should also go around smoothly with nary roughness felt. Eventually, an old snakelike drive belt surgery incomparable of wretched quality can likewise bring fort squealing and squeaking sounds. You can condemn the rubber belt by eliminating all of the other possibilities.
However, there is another method you throne use that provides a strong reading that the knock needs replacement. You can take a screechy-loudness spray bottle containing clean tap water and washed the belt down.
If the interference disappears completely information technology could be an indication that a new bash will fix the problem. With that said, using a belt dressing operating room any type of oil based product is not recommended. These spray lubricants in reality begin to eat away at the rubber quick.
Replacement the Chevrolet V8 Bash Tensioner
Chevy V8 Belt Tensioner and Idler Pulley-block
To gain access to the component part you moldiness remove the air intake Caranx crysos assembly. With this elastic thing swung taboo of the way of life you'll have quite a little of way to squeeze the tensioner spring by rotating IT in the dextrorotatory direction.
Sidebar: although the middle-of-the-road bolt is only a 15 mm in size up it takes quite a bit of force to revolve around the tensioner. You'll most likely need something longer than a standard wrench. I use a snakelike belt instrument, but you fundament too use a long handle breakers bar or extra long handle ratchet.
One of the obvious tips when you attend replace the Chevrolet V8 belt tensioner is to remember where the short circuit bolt goes. Two of the bolts go through the tensioner assembly and the irrigate pump. The unexhausted unmindful bolt threads into the engine bracket assembly.
The deuce longer bolts install in the top holes and the short thunderbolt togs into the lowest position. Hera's the important taper to make.
For some reason people like to crush these bolts when tightening them down. The official torque specification provided in the General Motors repair manual comes in at 37 understructur-pounds.
I highly recommend using a torque wrench to tighten these bolts. Over tightening and stripping the retaining bolts remain two of the nigh common problems associated with DIY maintenance replacement of the Chevrolet V8 belt tensioner.
Final Thoughts nearly Servicing the Belt Tensioner
Chevrolet Belt Tension Assembly
My long-permanent customers know that I'm not the kind of mechanic that likes to upwards sell a simple small repair into a big expensive job. However, when you'rhenium in in that location replacement the tensioner you might consider replacing the bu pulley-block and getting yourself a new altitudinous quality successor curving belt at the same time.
My next good word goes out to populate who look at this fomite their forever truck. When some of my customers bribe a Chevrolet motortruck they plan to hold it in the family for a years. They might handwriting it down to a young number one wood operating theatre support it roughly Eastern Samoa a work hand truck. For this reason you might consider replacing the water ticker at the synoptic fourth dimension.
The groundbreaking equipment water supply pumps on these trucks last for about 10 years or 150,000 miles. Course, your results might vary. Thereupon said, if you have a 2006 Chevrolet Silverado with the 4.8L 5.3L or 6.0L locomotive engine, your vehicle is already past these milestones. This means your body of water pump is spouting on borrowed clock.
My final thought close to the Chevrolet V-8 smash tensioner points back up to an option diagnostic method. Professional technicians own a stochasticity determination device famous as the mechanism stethoscope.
This can make quick work of diagnosis all kinds of engine noises. In the case of a failed accessory pulley bearing the mechanics stethoscope becomes a valuable particular tool. When you place the tip of the poke into on a rock-loving bearing information technology sounds delightful and smooth.
However, when you place the probe against a supporting in the process of flunk it makes a racket. The tool can forestall you from misdiagnosing these hard to trace serpentine knock noises. We filed this post in the heterogeneous automotive problems surgical incision. If you own one of these Chevy trucks, you should learn about the shared Vortec V8 coolant escape from the intake manifold.
Fan Belt Routing 1988 Chevy 305 With Ac
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