I've just purchased a 98 A4 1.8 Turbo with 93,000 miles. I'm doubtful that the plugs have ever been changed. I'd like to change them on my own. Is it a big job on this vehicle? I just had the timing belt, dampner, tension roller, and roller as well as serpentine belt replaced so would like to save some $$ and do myself. I've been told in the past that if the plug wire look OK on a vehicle, its not really necessary to change them?? What is the best plug to use - Bosch or NGK??

Thanks!

 

Nope, not at all. Simply pull your engine cover off. You will see 4 coilpacts on top, Loosen all all 8 hexs holding them down. Use a deep socket and extension to loosen them. Throw in ur new plugs( i use ngk brk7es) and tighten them to like 17ftpd, just basically tight, u dont u need to be exact. Make sure u get the right coilpacks back in the right cylinders too.

 

Don't forget to check the gap on the plugs and use antiseize compound on the top half of the threads.

 

whats the gap size?

 

if the plugs are mulit pronged there is no gap necessary

 

I would be. 93k on the clock without a spark plug change? If that is true then you will really benefit from doing this..