i have a b16a in my crx and i noticed when it hits 3000 rpm there is a weird vibration. it only happens at 3000 and it doesnt matter what speed the car is going. any ideas?

 

check if it does it when engine is cold only. and also check the dizzy cap and rotor for damage

 

no does it all the time and the dizzy and rotor are good. its not that crazy of a vibration but its defiantly noticeable

 

check your motor mounts and the crank pulley...it probably just hits a certain frequency and transfers vibration to the car. i would try to re-torque the crank pulley bolt and lube the motor mounts with grease

 

where would i even lube my mounts. they are kinda in there and not holes to put oil into since there is a bolt going through them

 

i also need help on this problem... it didnt shake up until i changed my axles . i just cant figure why its doing it

 

that could be something. i did change the axles from the stock crx si ones to 90-93 integra ones for the swap. could it be something with them not being balenced right?

 

aojtin, if your vibration is not speed dependent, then i wouldn't consider the axles. as far as lubing the mounts, i would try a cap-full of oil on the edges where the mount meets the car and the bolt edges...you might get lucky. you might want to check your belt tension on the alternator and timing belt, and check the pulleys for straightness.

the axles may be a separate issue. i think depending on what mounts you run and your ride height, they may bind

 

Might be a stretch but also check intermediate shaft bolts on rear of motor

 

i just thought about it it cant be the axles or the intermediate shaft since it happens in neutral. mind you it only happens at 3000 rpm

 

It's just something to do with frequency of the vibrations from the engine at that speed -- mine does it too, and has since it was installed four years ago. Personally I like it and I don't need to look at the cluster to know when I'm doing 90km/h!

 

you running the stock crx si hubs.....if so it can be that you didnt remove the dust ring on the hubs...double check

 

yes stock si hubs and i did take out the dust seal. remember i said it does it with the car out of gear. also im glad someone else has heard of the issue "Black4thgenEF" and that it hasen't ruined anything in their car over time 4 years is a while. what motor-mounts are you using. I am using avid. also i changed my whole system to fully synthetic 2 days ago and installed ngk iridiums last night. I was still using the Denso iridiums that came in it from japan XD.