Originally posted by MikeSarr_GSR
hey all any ideas:
1.) valves are set to .007/.008 they are set very well
I ran through them again today making sure a larger
size could not fit, yet the proper size is snug.
2.) the timing belt tension is proper, the deflection is
the size of a 10mm wrench opening.
3.) VTEC is intermittant
4.) Oil pressure never throws a light, oil level is
4+ qt directly after shutoff.
5.) cams are set to dead 0,0 on my gears and the
valves were adjusted here.
6.) timing is at 16BTDC
7.) idles perfectly, no stumbling, no hesitation when
revved, good transient response to motor
8.) sound is not present at idle only after say 2500
under any kind of accleration and WOT and narrow
throttle does not change behavior
9.) power under VTEC is weaker
10.) I have 98 CTR/01 ITR cams
Hypothesis:
My car ran great until I adjusted my valves when still
kinda warm this Wed. I had a few kinda tight, and I still buttoned
it up and ran it hard. (dumb) once it warmed up completely,
no doubt they were tighter than they should have been,
and I think this weakened and later worked my LMAs due
to running more lift at the valves than normal.
the sound comes in at 2500 and remains through
the revband and does not get louder, the engine
muffles it after say, 5700. It is most apparant under
accleration. It is a thin, tapping/hammering sound
on the intake side of the motor. holding the sound
constant and removing the spark wire does not
stop the sound. It is resonating in the head, under
the valve cover. The deflection in the timing belt is
non-existant with the cover cut and the upper belt
cover removed the belt is stable and has no flap in
it at all. Its the best I ever got it honestly. Throttle
response is great low end, power on the low cam
is very good. It sounds like the pitch of a large coin
on a peice of glass, not deep or hollow like it is hitting
a solid surface.
I think I may have destroyed the Lost motion assembilies.
Can anyone advise here?
This is how my problem started. There's a number of other guys on the board with similar noises, and we're pretty much all asking the same questions. I had the same power loss and problems, before the engine started tapping like that at all rpm's. If you take it in to a shop, would you mind shooting me an email letting me know what they found? I'll do that same if I find out whats wrong with mine and it might give you a good direction to look at the very least.
Here's a clip, see what you think...
Ca-clank