A8 Parts Forum  

Go Back   A8 Parts Forum > A8 D2 > D2 - Engine Bay

D2 - Engine Bay Everything under the bonnet

Reply
 
Thread Tools Display Modes
  #11  
Old 26th July 2021, 09:42 PM
Audifan Audifan is offline
Senior Member
 
Join Date: Feb 2020
Location: America
Posts: 388
Default

Quote:
Originally Posted by ainarssems View Post
Fair enough if you have the tools yourself to pull out and press in new guides and to recut valve seats. When I was looking at it and was talking to head shop their position was that there will be some wear on valve stems as well so they said if using off the shelf valve guides than best to use new valves too. But if they supply valve guides they could do tailored bore size to suit old valves. Not sure how much truth is in it, I never proceeded as I found pair of heads with 2000 miles on them for less than it would have cost to reburbish 1 head.
I don't have the tools yet. Interesting.....is there a way to test the valve guides to see if they need to be replaced or not? If my valve guides test good, I'll just replace the valve seals and call it a day.
__________________
2001 S8 (build date March 16th 2001) Brilliant black with oxblood red/black interior.
Mods prior to my ownership: 01E 6 speed, carbon fiber trim, bi-xenon, aftermarket muffler with x-pipe, tinted windows, non-tip steering wheel, Spal electric fan.

My mods: Oxblood red interior, LED interior lights, D3 ignition coils, new window tint, tip steering wheel with new S8 emblem, mk1 TT steering wheel air bag, mk1 TT 6 speed shift knob, new shift boot.
Reply With Quote
  #12  
Old 26th July 2021, 10:16 PM
MikkiJayne MikkiJayne is offline
Senior Member
 
Join Date: Jan 2012
Posts: 5,017
Default

Measure the amount the valves rock in the guides at maximum lift. Usually the exhaust guides will wear the most. I'm not sure if the stats are published in the factory data - I will have a look when I get a mo. It was insignificant on the head I put on Mark's engine in the recent WITW thread though, which had ~120K miles on it.
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT. The time now is 06:48 AM.


Powered by vBulletin® Version 3.8.0
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.