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tpunx99GSX
01-10-2009, 11:02 PM
Ok so im still trying to figure out this Rattle. Its more of a knock so ill call it that.
The car idles PERFECT. No obsurd sounds, no shaking, really no problems.
If i rev the car to just about 2.5k rpm it makes a knocking sound, i listen really closely and it sounds like its coming from cylinder 4.
If this was rod knock, would it be only happening at 2.5k and above? Or would it affect idle?
Is there any tests to check for rod knock? Can i take off the oil pan and be able to wiggle the piston or something? Im really freakin confused, and if this is in fact rod knock, im parting out the car. But it would really like to sell this as a whole and be done with it.
Just a few notes:
New timing belt, New revised lifters bled etc, new clutch, new head gasket.
Thanks in advance. Ill try and capture the sound on video and post it.
Goat Blower
01-10-2009, 11:18 PM
It very well could be. Drain your oil and look for metal particles, it could be a few things, none are good.
tpunx99GSX
01-10-2009, 11:24 PM
Can you name a few of the things it could be, it would be very helpful. I just need some places to look? The oil is clean, i have replaced it 3 times in the past 2 months. Made sure it was clean. no metal flakes, nothing.
95talonracer
01-10-2009, 11:24 PM
I have delt with that same sound and also occured over a bit higher rpm then idle and both cases was a bad rod bearing. Take off the oil pan and look for shavings and you should be able to grab the nut on the lower portion of the rod and yank back and forth and it will more then likely have play.
tpunx99GSX
01-10-2009, 11:36 PM
I have delt with that same sound and also occured over a bit higher rpm then idle and both cases was a bad rod bearing. Take off the oil pan and look for shavings and you should be able to grab the nut on the lower portion of the rod and yank back and forth and it will more then likely have play.

If this is the case, can i replace the bearings without pulling the block?
GnArKiLl
01-11-2009, 12:48 AM
sure can... but the rods will need to be checked to make sure they are in spec, witch you would have to pull the head off to do
craig
01-11-2009, 09:04 AM
it also depends if it has chewed on the crank
tpunx99GSX
01-11-2009, 11:15 AM
im gonna try and pull the oil pan tonight and pull the bearings, ill post pics.
JET
01-11-2009, 11:50 AM
Yeah, likely the crank won't be in good shape either. It sounds like you caught it pretty early though, so you might be in luck.
tpunx99GSX
01-11-2009, 12:14 PM
Yeah, likely the crank won't be in good shape either. It sounds like you caught it pretty early though, so you might be in luck.

Yeah ive been driving it really easy, no shifts over 3k. (and i actually mean that...) Plus i had been breaking in the clutch (just hit 300 miles) so hopefully all is well with the crank. Im at my wits end with this car.
After the new bearings, is there a break in period? also what do you guys suggest for the replacement bearings? And should i use some kind of lube on the bearings before putting them in or some kind of prep?