Strange rattling/tapping noise on startup?

[F8L WS6]

I don't know if I should be alarmed or not but this is what happens. When the car is cold and I fire it up, on the initial start where the rpms come up its normal, then comes this odd rattling/tapping sound for maybe a second then it goes away and never happens again during the rest of the drive. I bring the rpms up myself, and also had a friend do it while I listened and it didn't make a noise at all. Has anyone else had a problem like this? Any clue on where to start?

Things I did right before this started happening was change oil/filter. I used Mobil 1 synthetic 10w30 and I changed the oil filter to a NAPA Gold 1086. No shavings or anything in the old oil. Oil pressure hasn't changed either. Before I did this I noticed no noise.

Thanks in advance for any insight!

 

[87natl]

I had the same problem when I went to a remote oil filter setup. Once I pulled it back off and went back to a standard filter setup, everything was fine again. My oil pressure came right up and never droped much below 20psi even at hot idle.

Regardless, I would just try a different oil filter, cange brand, to see if it helps. Cheap and quick possible solution.

 

[19gn87]

Have to admit I'm not a synthetic fan, but curious if this the first time you used it? Nevertheless, I suspect a 'bad' filter (it does happen). Personally, when it comes to brands, I would stick with AC.

 

[F8L WS6]

Thanks for the reply's. I figured It would probably be one of the two. I just bought the car and the first thing I did was change the oil. I have no clue what was in it before since it was at a dealership. I have loads of synthetic at the house for my other T/A so I figured I could use it. That and the filter that was on it prior was much larger than the one I put on. I only used the 1086 by reccomendations from posts I read. I think i'll get myself another filter then for sure.

Thanks alot, and if anyone else has any ideas it would be great to hear them.

 

[2QUIK6]

If the filter does not have the anti-drain back valve, it takes a moment to fill the filter once the motor started, the tapping may be the lifters/rockers tapping when dry befroe the oil starts pumping. Pure Synthetic oil can also cause this if it sits for a while, synthetic oil does not stick to parts like conventional oil does, so the parts are drier at startup if its been sitting for a while, main reason I don't use pure syn oil since mine sit for weeks at a time without being started.

 

[Adrian87]

I had the same problem for a while after I switched to full synthetic, then I went to 20w50 (same oil) and switched to the Wix filter and haven't heard any noises on startup. It used to make me so nervous that every time I would need to start the car I would pull the orange wire and crank til I saw something on the oil psi guage. Try the wix filter and a little heavier oil. I have been using Castrol Syntec.