Recently I rebuilt the engine with weisco low compression pistons and manley rods and have always had a aweful noise which really does not decrease at all when the car is warm. Wish it was the belt but it sounds internal. I have put over 600 miles on it so far though and just put 18 pounds of boost through it without any issues. The video is pretty much after I was ripping on it. Let me know your thoughts

http://i259.photobucket.com/albums/h...1/f3e1b10c.mp4

 

adjust your valves? sounds like something is rattling around in there, lol

 

Whats your PTW clearance? Bore size? Recommended PTW on the spec sheet?

 

There's also a smaller clicking sound that can be ignored as its a boost controller. Obviously the louder sound is what I am concerned about

 

I adjusted the valves about 3000 miles ago and before the install the noise was not present.

 

Standard bore with standard piston size. I measured the cylinders to make sure they were not already oversized and they were not. Not sure on the p2w clearance installed or the recommended

 

http://www.wiseco.com/Catalogs/Sport...AcuraHonda.pdf

K541M81 is my pistons on the list. I also dont see anything on there about piston to wall clearance and they do specify other things.


I have been searching and found this video that sounds awefully like it. He stated in the description that the ptw clearance was too tight on #2 which caused it.

http://www.youtube.com/watch?v=HkibGNP-rko

 

didnt think that would be important huh? lol

 

X2 you really need to know to ptw when building an engine

 

Did you guys take a gander at the spec sheet? At the bottom they specify certain things to check for. Its not listed.

 

well your pistons are slapping like crazy....sooooo

 

so you didnt get a spec sheet with the pistons themselves?

 

Nope I didnt but if you were rebuilding a motor it should be common knowledge that you need to set the correct ptw. Why do you think that measurement wouldnt be critical?

 

Sure didnt. Bought them second hand from a guy who had them forever and didnt run them. Yeah really I had no clue on the ptw issue until now. Im sure theres no other way of figuring it out besides taking it apart again correct?

 

did you have the cylinders bored/honed? or did you just drop them in?

 

Honing tool on the cylinders. Was just going for crosshatches and not to any specs.

So again is there any way to externally diagnose this ptw issue? Compression test would not show this issue unless its very loose correct? Really dont want to take this apart again

 

+1

Sounds like loose valve lash or bad LMA's.

 

Not really unless you can see scratches down the cylinder walls. To check ptw you really need to pull the pistons and mic them correctly then take a dial bore gauge to the cylinders

 

Thats way beyond valve lash, valve lash is more of a ticking sound. What he has is more of a knocking sound.

 

Here's another listen. This one you can hear it off and on. I also turned off the clicking boost controller
http://i259.photobucket.com/albums/h...1/0616b664.mp4

 

Recheck your valve springs and valve lash. Ive had a valve lash adjuster nut come loose on me once and actually fall off into the oil pan. It sounded that bad too. Has this built engine always sounded like this from day 1?

 

WOW! I bet that gave you a shock and a half.

 

sounds like a bent valve/damaged seat...check your cam timing it may have jumped from improper installation.

I run coated wiseco's in my current car, they reccomend .0025 PTW which is too tight in my book, I run .0035 for under 450 hp for the coated ones

 

Wait...you said the new set-up only has ~600 miles on it. Did you not pull the head off when you rebuilt it?

 

Yes it sounded like that pretty much right off the bat. As you can see from the second video it's intermittent but shines mostly in low and idle rpm.U