Friday, November 19, 2010

How to change Timing Belt and Water Pump in Audi 1998 A4 Quattro2.8?

If your asking this question on line, I WOULDN'T recommend you do it yourself unless you've got some good manual and/or a friend who has done a timing belt. I've never worked on an Audi, but if it's anything like my sister-in-law's VW (they are the same company) it requires quite a bit of time. If you are mechanically inclined.

Typical steps to replacing a timing belt.

1. Disconnect battery.

2. Remove all accessory belts. (various means).

3. Remove the harmonic balance. (On the crank shaft that was driving all the accessory belts. Usually the hardest part for me of a timing belt change.

4. Remove the timing belt covers. Typically an upper and lower cover.

5. If necessary you may have to remove an engine mount if the engine is a transverse mounted engine. If this is the case you'll have to support that part of the engine with a floor jack and preferably a piece of wood or something that won't punch through your oil pan. Or you can use an engine hoist from the top.



6. Now align the crank shaft and cam shaft(s) to Top Dead Center (TDC) for cylinder 1. Usually there's marks on both the cam and crank shaft to indicate when you are at TDC.



7. Now look for a pulley that is applying pressure to the timing belt, but can be loosened and be pushed against to loosen the timing belt.



8. Remove timing belt.



9. Remove water pump.



10. Install in reverse order.



11. However you need to be sure you didn't mess up the synchronization between the cam shaft and crank shaft. So after re-applying the tensioner's pressure. You must try to turn the crank shaft two rotations and check cam shaft location. They should be the same as before. If not, your crank and cam shaft have gotten out of synchronization and you must take the timing belt off and re-sync them.



If everything is in sync, then re-install everything in the reverse order.



That's the short version of how to do a timing belt. I recommend getting a few manuals to look over the entire process.



Good luck.How to change Timing Belt and Water Pump in Audi 1998 A4 Quattro2.8?
it's not a DIY job for an amateur, but maybe you can find somebody on audiworld.com who has done it and would be willing to help you. It involves removing the bumper and dismantling the front part of the engine. While you're there, it makes sense to replace the water pump as well. Shops will charge you between $900 and $1400 to do the job.



Click on my source link for a step-by-step guide. In addition the forums on Audiworld can be very helpful. I paid $1100 for TB/WP replacement on my Audi (same body style and essentially the same stuff in the front of the engine)
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