Page 1 of 1
~2000rpm weird sound, crankshaft loose??
Posted: Fri Mar 25, 2005 3:18 pm
by mhrallyteam
Details: Engine runs ok, but at around 2000rpm a got a intermittent clunking sound, different from the valve lifter sound.
Sound kinda like a diesel, and i dont hear it quite as much at any other rpm. Its noisiest when the engine is off load
What do you guys think : is my crank bearing on the go or im i too paranoid
Posted: Fri Mar 25, 2005 4:19 pm
by TDGKORN
I am having the exact same noise.
I haven't been able to track it down yet.
I hope it's nothing to serious.
Posted: Fri Mar 25, 2005 4:57 pm
by professor
water pumps usually bang around when you let off the power, as the rotor sorta freewheels for a little while
Posted: Fri Mar 25, 2005 4:58 pm
by TDGKORN
I hope it's just a water pump!
Posted: Fri Mar 25, 2005 8:24 pm
by mhrallyteam
I doubt the water pump would make such a deep clunking noise, but thanks for the cue
Posted: Fri Mar 25, 2005 11:39 pm
by evolutionmovement
Crank on the pulley to be safe. Could be detonation?
Steve
Posted: Mon Mar 28, 2005 2:58 pm
by mhrallyteam
I would be awfully surprised to see detonation at 200rpm without any load on the engine. I rebuilt the engine(except bottom end) last year, so i don't think there is any carbon built up in the cylinders. I'll keep looking.........
My guess, wrist pin loose or crank bearing
Crankshaft pulley
Posted: Fri Apr 01, 2005 11:06 pm
by spongewagon
Check the crankshaft pulley nut. I had a similar noise, it got worse and worse until it almost fell off.. I had to tighten it with a huge extension and the car in 5th gear .
If you have an auto you may have to take the starter out and jam the flywheel to tighten the bolt.