Tapping Noise From #2

[AndyUK]

All,

I am new to the forum and relitively new to Subarus. I have a 2011 STi, i Am down i Southern MD at Pax River. I have an AEM Cold Air Intake, Invida Turbo Back System with Sport Cat and Cobb Stage 2 Map.

About a month ago after getting a pro tune map loaded i had a detonation on #2 cylinder (Spark Plug Eart Bent & Piited), I replaced the Plug and put the Cobb stage 2 Map back in that i had been running for the previous year with no problems. But ever since that event i have a noticable tapping noise coming from the #2 cyclinder area. I have driven a further 2,000 miles since the event and the tapping is no louder but is very noticable. I have compared it to a friend of mines 2011 STi and thier car runs very quiet in comparison.

I am going to take it to Annapolis Subaru tomorrow to see what they think it is but i would also like the opinion of you guys (who wont be trying to take all my money) as to what the problem could be.

Andy

 

[Spamby]

Spark plug being bent means there is some kind of mechanical damage within the motor.
The tapping noise can be a whole host of problems from exhaust leaks to spun bearings or piston failure.
Your shop needs to do a compression and leakdown test.
Good luck and hopefully it is something simple.

 

[AndyUK]

So even after 2,000 miles of running with no faults it could be a piston or spun bearing?

 

[Spamby]

Yes

 

[Grinder34]

People drive around with ringland issues without knowing. There's a lot that could be going on, but a compression test could tell you a lot. But a damaged spark plug is definitely a worry. Doing a compression test yourself could confirm an issue, but after that you'd likely have to take it to a shop anyways. If you take it to Annapolis Subaru there's a chance that if they find an issue they can get Subaru to fix it...they're relatively mod friendly.

 

[Grinder34]

Did the dealer find anything?

 

[Panchosti208]

It could be a spun bering mine has the same issue.

 

[Spamby]

What did you find out about this?