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I need a timing belt diagram for a 2003 Chevy Express Van, 4.8 V8.

My Alternator went awol on me this weekend (stopped working) and I bought a new alternator. I have removed the old alt. installed the new alternator, but my pulley has suddenly grew longer... by about a foot! I am obviously missing a pulley somewhere, but to the best of my searching... I cannot see where it needs to go? A Timing belt (accessories belt) diagram is what i need... can anyone help out with that please??

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

basilfawlty
  • 39 Answers

SOURCE: 2003 focus timing belt replacement

Firstly if the belt went you probably have bent valves. However if you want to assemble and see remove cam belt covers,remove crank pulley (could be tricky if you don't have an air tool ) remove tappet cover ( you may have to remove the throttle body to do this) Get some flat bar approx. 6mm thick and 400 to 500 mm long. You will see that on the gearbox side of the cams there are slots in the end. Remove the plugs and put a screw driver ( long ) down the hole, any one, and turn the crank untill the piston is roughly half way down the bore. Turn the cams until the plate will sit on the head and slot into the cams thus locking them. The slots are offset so you will have to play around until the plate slides in easy. Then loosen the cam gears untill you can spin them by hand, but not so loose that they are falling off. Put your long screwdriver or preferably a dial guage with extensions into no 1 plug hole turn the engine untill the piston is right at the top. Loosen the tensioner and push it back against the spring and lock it fit the new belt right to left then let the tensioner go. Check play on longest side of belt it should move about 6mm. lock the tensioner. Tighten the cam pulleys and remove plate. turn the engine one full turn clockwise and check belt tension- adjust if neccessary. turn one full turn again and make sue plate slides in when no. 1 piston is on top. Then do a compression test to see if you have bent valves. If the compression test is ok. reassemble and drive away. If not (the exhaust valves are normally bent) you are half way to taking the head off. In which case contact me and I will walk you through it. Good luck Shaun

Posted on Jun 10, 2008

  • 1 Answer

SOURCE: replacing timing belt on daewoo nubira 2000 model

Instructions Difficulty: Moderate Things You’ll Need:

  • Set of ¼-inch drive sockets ¼-inch drive ratchet Set of ½-inch drive sockets ½-inch drive ratchet Set of 3/8-inch drive sockets 3/8-inch drive ratchet Set of metric wrenches Floor jack Jack stands
Step1 Raise and support the vehicle on jack stands. Remove the intake air temperature wiring, the breather hose and intake air hose. Take off the air cleaner assembly. Step2 Remove the right wheel. Remove the accessory belts. Remove the crankshaft bolt and the crankshaft pulley. Remove the power steering bolts and the timing belt covers. Temporarily install the crankshaft bolt and turn the engine clockwise until the mark on the crankshaft pulley, which is a triangle stamped into the crank sprocket, is aligned with the corresponding triangular mark on the block. Step3 Make sure that the timing marks are aligned on the camshaft sprockets. These are a line on each sprocket that runs through a tooth on each sprocket. These lines should line up in the middle between each sprocket and point toward each other. If they do not line up, turn the crankshaft one more time and they will line up. It takes two turns of the crank to one complete revolution of the cam. Step4 Loosen the water pump bolts; using the 3/8-inch ratchet, turn the water pump clockwise away from the belt and loosely tighten the bolts to keep it there. Remove the timing beltmag-glass_10x10.gif. Make sure the timing marks are aligned and install the new belt starting on the right side from the crank sprocket and working counterclockwise. Keep all the belt tension on the right side away from the tensioner. Step5 Loosen the bolts in the water pump and rotate the water pump counterclockwise to apply tension to the belt. Watch the tensioner, which is above the water pump, and apply tension with the water pump until the pointer on the tensioner lines up with the notch above it. Lightly tighten the water-pump bolts. Step6 Turn the engine two more times and align the timing marks perfectly. Loosen the water-pump bolts and, using the ratchet, apply tension to the belt until the tensioner pointers are aligned. Tighten the water-pump bolts. Step7 Install the timing-belt covers and the bolts in the power-steering pump and tighten. Remove the crankshaft bolt and install the crank pulley and the bolt, then torque the crankshaft pulley bolt to 70 foot pounds of torque. Install all components in reverse order of removal.

Posted on Mar 08, 2009

  • 8 Answers

SOURCE: How to loosen alternator tension on a 2003 Lancer

I have not seen this vehicle but, the center bolt or nut that holds the tensioner to the block is backed off two turns first.
Then the adustment bolt (most are accesed from under the vehicle) can be adjusted to give enough slack to install the new belt.
If this is still too tight, remove one of the two or two of the three bolts that mount the Alternator to allow for another 1/8" and install the belt.
Then remount the Alternator.
Then readjust the tension bolt.
Finish with the bolt or nut that mounts the tensionor to the block.
good luck.

Posted on Jun 28, 2009

  • 468 Answers

SOURCE: 2003 Chevy Suburban-replace alternator

Ok, Alternators are a breeze on these things. There are two bolts that hold it on, and 2 sets of wires. If you haven't taken anything apart yet, and the belt is still on it, here's what to do. You will want one of those rubber or elastic bungee cords, about 2 and a half feet long(this makes it easy). Hook that bungee cord to your hood somewhere, so that it hangs down. Hook the other end on the serpentine belt right next to the alternator pulley. If you need to prop the hood up with a stick or something to keep it up, do so. Pull up on the belt, and watch the pulleys. The one that probably has a plastic pulley on it that moves up and down(this is the tensioner) is the one that you'll put a deep well socket in the middle of with a ratchet, and turn counterclockwise. This will make the belt go loose. Now you can work the belt off the alternator pulley, and once you get it off, the bungee cord will keep it in place, so you don't have to look at the diagram. Otherwise, if it comes off, there is a sticker just under the hood either on the fan shroud or the radiator support that has the belt diagram. Now, you can disconnect the battery, pull the rubber boot down off the nut and post on the back of the alternator, remove the nut and wire, and then unhook the wire from the side of the alternator. Now, you can remove the two bolts that hold the alternator on. You Will need to pry the alternator off at this point, as it fits really tightly in place. A socket extension or a large flat screwdriver works really well for this. Once you get it off, put the new one on exactly as you took the old one off. Note, you will have to release your tension on the tensioner at some point; i just ease it down, or if I can pull it off, wedge it somewhere where it won't loosen very far. Remember, on the tensioner, you're not trying to take the nut off. All you're doing is using it to move the tensioner arm. That's all there is to this job. Sometimes it can be stubborn with the prying part, especially getting it into place. Hope this is what you're after, and if you need more info, leave a comment for me.

Posted on Feb 22, 2010

Testimonial: "Great advice on the bungee cord!! Well written advide and easy for a novice to follow. Thanks"

  • 1757 Answers

SOURCE: replacing serpentine belt on 2000 chevy van need belt diagram

My sincere apologies for the delayed response.
I am personally going back to answer your unanswered questions.

I do not know if you still need this information, but I am going ahead and answering it anyway. You may want to Print the Diagrams for future use.

I am assuming this "van" is a Chevy Venture?
CLICK
on the following LINK. It has the Belt Diagrams you will need.
If you would: Before Clicking: Let me know if this helped you, or if you have any additional information or questions. Feel Free to contact me at FixYa.com!
Again my apologies...
http://www.2carpros.com/car_repair_information/year/2000/make/chevrolet/model/venture/2000_chevrolet_venture_drive_belt_routing_diagram.htm

Posted on Mar 06, 2010

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