Subaru: Little nocking sound question

A mechanic could pin this down for you but known issues that may relate
to the noise you hear are TB tensioner and piston slap (but maybe that's
the 2.5l?)

Carl
1 Lucky Texan

Johnny wrote: 


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"Carl 1 Lucky Texan" <not> wrote in message
news:not...
piston slap (but maybe that's the 2.5l?)

My 98 2.2 had bad piston slap.

But when the engine is hot it sounds very smooth.
"AM" <com> a écrit dans le message de news:
6WYpb.9581$news.atl.earthlink.net... 

I had a '98 GT sedan that exibited the exact behavior you describe. It
improved when i switched to synthetic 5W30, ESPECIALLY in winter. I
talked to my dealer about it one time out of curiosity. The service
manager gave me a photocopy of some sort of training info for the
mechanics i believe that described the design of the valve lifters and
the noise is normal. Based on my experience with the oil, I'm guessing
the oil passages to the lifters is quite small and colder (more viscous)
oil can't make it there very well.

Stu

Johnny wrote:
 

Can an anti-drainback oil filter can help? Since years my cars is on syn
oil.
"Stu Hedith" <com> a écrit dans le message de news:
ThZpb.108206$.. 

"Johnny" <ca> wrote in message news:<AGZpb.9520$risq.qc.ca>... 

Nope. The filter sits vertically, with the open side _up_, so there's
no need for an anti-drainback valve.