Hello, i bought an 1999 Impreza at 128,000 km in exellent condition but i have a little question, when the engine is cold i hear a little nocking sound that come from the center of the engine (well i think so). 5 or 8 minutes and it's gone, i'm not familiar with 4 cylinders sound so should i have to worry? The engine is a 2.2 and it take's no oil at all.
Thank you
Johnny
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 TexanJohnny wrote:
My 98 2.2 had bad piston slap.
But when the engine is hot it sounds very smooth. "AM" a écrit dans le message de news:
6WYpb.9581$ snipped-for-privacy@newsread2.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" a écrit dans le message de news: ThZpb.108206$HS4.915314@attbi_s01...
Nope. The filter sits vertically, with the open side _up_, so there's no need for an anti-drainback valve.
Just wrote that my '01 Outback 2.5 is getting the TB tensioner replaced. Bad TAP when cold (30 degrees or so) under warranty at 51K. Thought it was a valve tap.
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