I have a 2002 honda accord I4 coupe (ULEV edition) with a peculiar problem. The problem is that the pistons are pushing down too hard on the connecting rod/crank shaft bearings (creating a banging noise when I drive or accelerate in neutral). It could be a timing issue (spark igniting too early?) but the check engine light is not on.
I have had a mechanic look at the engine and they have determined that
- Oil pressure is normal
- Bearing clearance is good (meets specification)
- Cam timing is good.
- Balance shaft clearance is good
- Thrust clearance is good
The mechanics are not sure what is causing the problem. Does anyone here have any ideas on what else to check? Seafoam was added to the gas tank weeks before the problem surfaced. Could the car’s computer be damaged?