always good to try a good seafoam job first =)

 

Nothing works as Lubro Moly - proven German stuff=> VALVE CLEAN + Jectron Cleaner.
Followup with good engine oil flush - purge the valve lifters.
BTW- what kind of oil you have in now?

 

Right now I have in it Mobil Clean5000 5w-30, changed 200 miles back... back in December (I know, I know....I knew nothing about the Audis back then )

I guess I'll then throw in it a bottle of Lucas Upper Cylinder Lubricant (that's all I have on hand for now) or SeaFoam... fill up the tank with some "fresh" gas, and start from there.
The locking tools suppose to arrive by Friday, so upon completing the TB job I will change the oil also. I have a fresh batch of Total Quartz Ineo MC3.

Still my questions are related to the chain tensioner, if the A6 indeed has one. Nobody seems to know. Well... there's always a "first" Guineea Pig in everything.
Since I'll do the TB, it may be a good time to pull apart the intake manifold, at least to clean it.
Those retention valves appear to be in the oil filter housing, so unless I have a head cover gasket leak, the chance of pulling apart the cylinder heads is minimal.

We'll see...
Thanks, anyway.

 

On engine codes '95 AAH,ABC,ACZ, AFC

there is a single camshaft.

What code is your engine, what gear code?

What chain tensioner are you looking for?

Pressurizing of the oil system relies on the retention valves inside the oil filter.
Some oil filters do the job better then others...

You should be able to localize the source/area of noise using your hearing being over the engine... Using big screwdriver method

Using can of seafoam in a tank is a pure waste - use it as 1:15.
Synthetics tend to have more detergents, older cars require heavier oils. One could experiment with weight, type of oil.

Seems to me you are getting kind of paranoid=> this is a German car for God's sake - oil leaking and pinging noises are typical. Drive till breakage an then repair.

http://www.vagcat.com/epc/cat/au/A4Q/

 

AFC ; VIN - 4A
EBahn mashed the information for AAH AND AFC together...
However, the engine is a V6 and HAS 2 (two) banks, 3 cylinders per bank.
The 3243 holding tool suppose to hold in place the TWO camshafts. Or NOT?
Where did you get the single camshaft information?

There's information on the "cam chain tensioner" that can be the culprit for engine noise.
I wanted to know if this model has one or not, and worth looking into it.
It appears that it doesn't have one, as nobody came forth with such information yet.

I hope you mean "inside the oil filter housing", on the cylinder head side, not in the oil filter itself.
As far as the oil filter I could definitely agree, but 200 miles accumulated in only 3 trips renders the filter as not being the issue here. And probably takes the oil out of equation too. At least I don't think the filter or the oil have anything to do with the noise at the TOP of the engine. However, one may never know.

Ashamed to admit, but I have no idea what that method entails. Would a coffee mug have the same effect - like listening through the walls to the horny neighbors?
By the way, I already located the noise, that's why I asked about the chain tensioner. Is pretty much at the TOP of the engine, isn't it?

That makes sense and sort of backs the theory that the oil is not an issue here, even if it isn't synthetic.

Well, it may be a possibility that starting it only every 2 weeks or so while waiting for the warm weather turned me into an obnoxious and paranoid Audi owner. My apology.
By the way, what is the Vagcat suggestion for: parts?

thanks for the help.

 

Top of the engine noise is hardly a tensioner caused.

Vagcat is Etka online

 

Well, I really gave a thought since you puzzled me with the "single camshaft" information...
I mean even a kid probably knows that SOHC means "Single Overhead Cam", but how in the world the 3243 tool suppose to prevent from moving 2 cam sprockets (one of each bank)? Heck, I know I started now jumping from one thing to another, but this really puts things in perspective.
However, probably you must have meant "single camshaft" per header.
Since the V6 engine has two banks (two headers), then it has two camshafts.
Do we agree to....agree, or to disagree?

Anyway, back to the chain tensioner. According to a very respected figure that the forum has, Auditech, if the engine sounds like a diesel, then it is the chain tensioner.
You see, I wouldn't have asked the questions in the OP if I wouldn't have done my homework prior to posting. The reason I initiated the thread is that I cannot find out if the 1995 2.8L A6 -AFC engine has or has not a cam chain tensioner.
Believe me, I look to every notorius "Audi" place around, including the website you called "Etka online" in the previous post.

If you don't believe me, go to vehicle selection - "Audi A6/Avant с 1995", then pick "1995 - 4A", and from there "Engine, Clutch" category.
It is hard to find one illustration that has any reference to AFC engine, even though could be similarities of a 2.8L engine with a different code. Other than the "water pump" illustration, I don't think I noticed any other AFC reference elsewhere.
Everything is listed as applying to "AAH,ABC,ACZ" engines...

The only illustration for a 2.8L engine that may have given me some clue would have been:
, for "Camshaft, Valves"
Nevertheless, since are not two camhafts per bank, it would make sense that there's no need for a cam chain, let alone a tensioner...

At least you made me think.

Thanks for that.
I appreciate it.

 

You could always stop by the dealers (parts department) and ask them to show you their screens with vehicle data. Even print out could be obtained, or a pdf email.

If this is a noisy valve lifter (#9 from the picture) you would experience reduced noise sometimes - based on the position of the particular cam - drained or not lifter.

The noise should always fade with engine warm up.

If you take off the top TB covers you will have proof of the number of camshafts per bank-single or double.

Engine code AFC should be with single cam (confirmed) - do not post your transmission code (CJD, CJE).
You might postpone the plans for big spendings, for now.

 

Well, at least one issue is solved then: there's neither a cam chain, nor a chain tensioner in a 1995 AFC engine.
One thing I can do is to clean the Intake manifold, as noted in an earlier post. Around $ 50 for all the gaskets around to replace is not bad.

By the way: even if I wanted to do it and I knew it, why not post the transmission code?

 

the Intake manifold has nothing to do with the noise!
But if you have time and wish - get a can of carburetor cleaner-spray, it should do the job.
How is your oil level?
Is your PCV operational?
If I were you I'd do a good engine flush, then new oil with a can with Lubro Moly Engine Antifriction.
Good filter as well-Mann or Wix.
Your location specific-climate and mileage on engine you could consider heavier oil.
Then live everything in the hands of the Audi gods.
Good luck!