[wolfsbergjettagli]

Hello i have a problem i am new to turbo charges engines and am working on getting the bently for this car.

what i have
2004 b5.5 passat 1.8t wagon
108,000 miles
awm engine / manual trans
totally stock
(all service done at VW dealer till i bought it @ 104,000)\

Here is the issue, on cold start up i have a consistent "tapping or knock" form the valve train. once the cold start ends and engine drops to a normal idle the "tapping or knock" becomes intermittent. After warm up noise becomes nonexistent. warm start up noise nonexistent. i have tried to pinpoint the noise and found it centered around the valve train.

-timing belt, tensioner, and water pump changed @ 105,000
-valve cover gasket @105,000 no evidence of oil sludge
-plugs checked and @ appropriate gape

did fill up last tank with regular normally use premium however was unavailable @ the time


Thank you for any help,

 

[Marcus_Aurelius]

Most likely piston slap. My car has done the same thing for years with good compression across the board, and good power. If the noise is only at cold start, and everything else is in good order, I wouldn't loose sleep over it.

 

[crazyquik22023]

Cam chain tensioner is what's making noise. First check oil pressure, if good then replace cam tensioner gasket and check the tensioner pads. Are you using the correct weight 502 spec oil?

 

[wolfsbergjettagli]

0w-40 Mobil 1 syn Euro formula. what do you all use oil and filter wise. I just looked in the book for what was recommended.

i changed to a high flow oil filter 11-19 Lbs pressure the previous one was 19-28 lbs pressure. so will see if that makes any difference on start up. how it seem that general consensus seems to be a faulty cam tensioner.

 

[crazyquik22023]

0w-40 Mobil 1 syn Euro formula. what do you all use oil and filter wise. I just looked in the book for what was recommended.

i changed to a high flow oil filter 11-19 Lbs pressure the previous one was 19-28 lbs pressure. so will see if that makes any difference on start up. how it seem that general consensus seems to be a faulty cam tensioner.

That is the same oil I use. And I personally use Mann filters. But I would still check oil pressure with a mechanical gauge if possible. Like I said I guarantee that the tensioner is what is making noise, but weather the tensioner is making noise b/c of low oil pressure or b/c of a faulty tensioner that we don't know yet.