sup ht my b20vtec was knocking but itll only knock when i start it..
when it idles it idles perfect no noise at all. it also knocks when i drive it about 4k rpm. can it be a rod knock?
thanks for the help

 

Drain the oil and look for metal shavings.

 

i saw a bit of shavings bearings gone?

 

If you saw metal shavings then it's time for a rebuild. The more you drive it, the worse it'll get.

 

It prob wasn't that bad if it was only when it was started.

But its prob toast if you been driving on it

 

i checked all the bearings they werent spun or smashed up u think i can still save it and put it new acl race bearings?

 

And hope all the clearences are good after you put them in? Now is not the time to try to be cheap. Pull it appart and find out which bearing your shavings came from.

 

so wat should i do after i found the one that it came off of

 

If its a main make sure the crank isn't scored, if its a rod, make sure the rod and crank aren't scored.

 

i checked my rod bearings the crank wasnt scored still needa check my mains

 

i wasnt driving it for long when i noticed it i was on the freeway it took me like 20 mins to go home and i barely drove it after that

 

So, you were hearing a knock, but didn't spin a bearing?

 

yeaaa

 

Is that even possible?

 

Perhaps he is hearing slap

 

Unless he is running a set of low silicon forged pistons with a large p2w clearence, I highly doubt it would be piston slap. More so though because it wasn't at start up, but rather when he was on the freeway.

Idk personally from my limited knowledge base... a knocking sound around 4k rpms is usually a rod bearing.