I recently did a motor swap b16a2 in to a 2000 civic dx.. When at idle its not that loud, but while driving its enough to be an annoyance. At 3400 rpm (mostly 1, 2, 3rd gear) there is a rattling around the vicinity of the headers. Only at 3400, not any higher or lower, the sound jest goes away. Ive checked the header, the heatshield on the cat, and felt around for anything loose but didnt find anything. Does anyone else have a similar problem or insight to what the hell it is? Its really annoying and its pissing me off...

components:b1682, exedy stage 1 clutch, prostreet 12lbs flywheel, dc(onepiece) 4-1 header, rsr full catback exhaust, ES urethane torque mounts.

 

missing exhaust gasket??

 

Exactly! I had the same problem, exhaust gasket fixed it up.

 

Ill try changing out the bolts and getting new gaskets

was your rattling only at a certain rpm as well?

 

interesting.

i narrowed it down to maybe vibrations from the shift linkage hitting the exhaust. i will look into the gasket as well.

 

I had the same prob in the beginning, but i cut off a piece of the shift link, and that rattling went away, clears the exhaust with room to spare..
Oh, by the way, thx for the quik release, i like it alot..

 

I had the EXACT same problem. What it was for me was I just hand tightend my o2 sensor and it loosend it selfup a bit just enough to rattle. I'd check that. It's always a possibility.

 

hehe..no prob. still interested in the R valvecover?

 

yah i am, but funding is an issue at the moment, ill let you know when im ready, if you still have it at that time, but no need to hold it for me..


and thx guys for all the replies, ill try all o fthem to see what works, but keep um commin jes in case

 

Cracked heat shield here, rattled at 2800ish rpm, tack weld stopped it.