Knocking Noise (coming from the engine after warmed up) w/ Sound Clip
#11
Registered User
Thread Starter
Video with revving
#12
If it goes away completely once warmed up fully you can pretty much eliminate any sort of bearing issue. This COULD be considered piston slap, but I'm not sure, because I've never heard it on an S2000 before. If it were bearings though, the sound wouldn't go away and would get far worse once warmed up.
#13
Registered User
Thread Starter
Oh ok thank's for your response. I've just searched piston slap and i see its common on GM engines, correct me if im wrong.. Anyway, so do you guys think this knocking noise is harmful to the engine? I dont DD my car, i only use it on weekends and not driving it more than 10 miles. What do you guys think/advice?, should i still drive the car or not and bring it to a mechanic right away? I still drive it though. 2 weekends i think.
BTW this happened after we SEAFOAM & VALVE ADJUST.
BTW this happened after we SEAFOAM & VALVE ADJUST.
#16
sounds like a spun bearing to me sorry. drop the oil pan and the cover and see if theres any movement in the conrods or if its darker than the rest. it doesnt sound too bad so you could probably get away with just a crank grind, new bearings and conrod.
#19
well i dont know about you guys, but my AP1 has done it sine i bought it and that was 35,000 miles ago. If it was a spun bearing i think it would have showed up by now, not to mention two oil lab analysis says my engine is running pretty healthy. If it was a spun bearing I think it make the same noise even with a warm engine..