I recently rebuilted my B18C1 from top to bottom, new main and rod bearings, new seals all around, valve job etc...

When i rev to about 2K I can hear knocking noises, I can also hear it when i start up the car also. Anything over 2.5K it disappears. I dont know where its coming from. I gapped the intake valves to .6in and .8in on exhuast. Any Ideas?

 

It could be ur injectors, they are very loud on these motors but since you rebuilt it and u didnt say it was happening before idk??

Did you reuse the stock lost motion assemblys? If you didnt, then that is probably the culprit

 

Yes i reused the stock lost motion. Before the rebuild, i notice it time to time. What is a culprit?

 

You should get new lost motion assemblys then. Go on the classifieds section and there is a thread called all acura parts at employee pricing. The guys name is gabe and he can get you all 8 for about 240 instead of 300 somthing.

Look in the all motor section and there is a thread in there about LMA's. Omniman knows his stuff so pay close attention. I personally would use the gsr's lma's instead of the preludes, but idk. Omniman is the man.

 

One last thing i tested, my dad told me it can be my timing? i was like wtf? starts and runs good! But i noticed when I turned down my timing, the knocking almost disappeared but when i advanced the timing, gawd that f**king noise is loud!

 

detonation maybe

 

It only knocks at about 2K but after that sounds good! It doesnt knock at idle so im not sure why 2K?

 

make sure nothing is loose.

 

I took it for a drive, now it got worse, fills like im loosing power. Knocks at all rpm now. Any Ideas?

 

stop driving it. you've more than likely spun some bearings. good job

 

youll have bettter luck in the ITR forum.

 

hopefully nothing got ruined from the drive you took...goodluck

 

Now that its gotten worse, drain the oil into a VERY CLEAN CONTAINER. Wipe out the container extremely well. And also change the filter. When you are ready to put the oil into a milkjug or 5 gallon container, use a paint funnel to catch and debris that was in the oil. If it is clean, then you havent done any damage. Also cut open the filter and cut out the media and inspect it for any shavings. Hope that you dont find any.

GL

 

gawd damnit! i thought it would be the lost motions! lol

 

What else can it be? i mean its running and not stumbling on idle! Just knocking hella loud, but i remember at about 4-5k it wasn't that loud

 

.6in and .8in? thats over half an inch.

 

I mean it was .006 and .008 pwhahaha

 

did you check the ignition timing yet?

 

Timing might be off? My dad told me it might be my timing.

 

drain your oil into a clear container and cut open your filter tell us what you find

 

sounds like a rod knock

 

Rebuilted, lol.

Pull the valve cover off and make sure cams and crank are all at TDC. Can't tell you enough how many people overlook this very simple detail. Then check your ignition timing and set it to stock using a timing gun, not just moving your distributor and guessing where to set it at.

If your lucky, you just have a cam gear that skipped a tooth or your timing is way off wack. If your not so lucky, like stated above, you may have a rod bearing knocking and is about to take your crank out with it. Good luck to you.


Modified by Sam92Teg at 11:14 PM 2/7/2006

 

If its a rod would it have damaged my block?