Time to pull the motor I guess.. Any good DIY threads?

 

Not much help here but how did you manage to damage/score the walls of cylc 4? How much mileage on the engine? Did you upgrade with the later 4 hole banjo bolt?

 

No idea how it got scored. 102k miles, all original engine components, never disassembled to my knowledge.

 

Interesting, thanks for the reply. Was oil changed on a regular basis? Track usage? Does it see VTEC often? I have read a lot of cycl 4 failures with early AP1. Just wondering if it can be prevented as i have a super early AP1 as well.

Thanks.

 

^ Also no clue to any of those questions... just bought it recently as a repo so I'm not sure what kind of history it's been through.

 

mine got scored after going on a group drive, i was low on on oil and had the earlier banjo bolts

i think if i had the proper amount of oil or the updated banjo bolts, it would've been fine

now i check my oil every day and have the updated banjo bolts

 

Are the early AP1 banjo bolts defective or something?

 

Definitely sounds like piston slap...happened to my s and the video clip of my car sounds identical

 

Would that be caused by the scored cylinder allowing combustion into the wedge between the piston and cylinder?

 

Streaks are as wide as the piston skirt, and appear black yes?

Noises can be hard over the internet sometimes, but high compression in #4 was a dead giveaway.

did you do any high spped runs? was the car ever supercharged or turbo?