mijin75

This is just a question. I have a 98 Audi A6 Quattro with 140,000 miles and was going to replace my spark plugs this weekend. The last time I personally changed plugs was on my 97 Honda Civic and it was pretty much disconnect the wires from the plug, unscrew the plug, put in the new plugs, and reconnect the wires again. I know it may sound stupid, but the Audi should be no different,,,Right? I just wanted to know, from someone who has done it, if there were anything I needed to watch out for or something extra that I should do before and after.

I was also going to change my oil and wanted to know what grade I should go with. I have been using 5W30 and have had no problems until this summer when I noticed my oil temperature will get up to 250 degrees F and cause my engine to start over heating a little on 90 and above days when the car is stuck in traffic or idling with the AC on.

Any suggestions?

paulroad

Bosch Plugs, and make sure you check the gap of the electrode. Never trust the pre set gap out of the box.

0W-30 SYNTHETIC Oil is usually advised.

When was the last time you changed/drained your coolant? This is something to do and you may also want to put in a new Thermostat. Assuming its original its past its prime since 98.

mijin75

Thanks, Let me add I have 140,000 miles on the car....sorry about that omission. :-)

OOOOya

I put Bosch Platinum +4 plugs in our 99 avant just the other day. It was suggested <a href="https://forums.audiworld.com/a6/msgs/539312.phtml">here</a> that I replace them with NGK's. I'm not an "Audi guy", I'm a Honda guy, so....

My advice on changing the plugs, be very careful removing the old ones in case they've never been changed. If you use the brute force method of breaking them loose, you risk pulling the threads in the head. Our car has just under 80K and the plugs felt very gritty coming out.

When you put the new plugs in, do yourself, or the next owner a favor and use antisieze. I use the copper colored high temp stuff. The "brush in can" size (8 oz?) will last you several lifetimes. Also use it on wheel bolts, exhaust fasteners, and anything other threads that might otherwise corrode in place.

SUBLIME

I was thinking about replacing my plugs pretty soon and only did a bit of searching. I have the same car as you.

OT: Your Hellsditch.org site is pretty cool. Nice adventures.

6ULDV8

Bosch F7LTCR is an alternate plug, but the OE part is NGK.

mijin75

Thanks for the reply...good info...I did here that two of the plugs are next to the firewall?

CHIZEN

on the driver's side remove the 3 screws that hold the coolant tank on, disconnect sensor on bottom of resevior and hang it using some heavy wire to keep it out of the way.

on pass side disconnect wires to maf and other wires, undo air cleaner box, and move assembly up and to the left to get to the rear plug.

or just use a good universal joint.