2.8 V-6 valve tapping - Audi Forums
Audi 80, 90 & Coupe Forum Discussion area for every generation Audi 80, Audi 90 and Audi Coupe. (Audi 80 Forum, Audi 90 Forum, Audi Coupe Forum)

User Tag List

 
LinkBack Thread Tools Display Modes
post #1 of 1 (permalink) Old 09-30-2011, 08:29 AM Thread Starter
Newbie
 
Join Date: Sep 2011
Posts: 5
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
 
2.8 V-6 valve tapping

Two years/12,000 miles ago my 1995 90S had head gaskets and timing belt/water pump replaced. Now with 148,000 ODO miles there is a severe valve tap. Recently had new oil check valves and valve followers (lifters) installed under the valve covers.

The tap is only heard after RPM remains above 3000 for several miles. Returning to idle the tap remains for a minute and then returns to normal, (silent). Engine load has no effect, same result in neutral as in 5th gear.

Oil pressure gauge in dash shows full (4.5 BAR) and once oil is hot will show 2.5 at idle.
Suspecting a blockage in the oil pick-up screen, the pan was removed and no material was found, the pan gasket was also replaced with the head gaskets 2 years ago.

With my local mechanic and the Audi dealer both puzzled I am now thinking the oil supply to the top end was effected with the head gasket work. The check valve/lifter repair was a waste of $1200.

The tapping began after the head gasket work but has become more severe with time. I hesitate to authorize pulling the heads again, I've spent $6000. in repairs at the Audi dealer in two years.

The other theory is a failure to supply oil volume but the clean pan and good gauge readings should negate this. Replacing an oil pump is expensive, ($600 part lives under the timing belt).
BDEUBER is offline  
Sponsored Links
Advertisement
 
Reply

  Audi Forums > Audi Models > Audi 80, 90 & Coupe Forum

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Audi Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in











Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



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
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome