need help here guys..
my neo cps auto has a weird sound at rpm near to 5k.
not sure if anyone encountered it before?
went 2 to workshops to troubleshoot so far but they cant pinpoint it
i suspect:
1) VIM valve, cps tappet jammed or spring rosak or something - workshop cannot confirm it
2) timing belt slipped one notch - workshop said not possible. but when open the timing belt cover and rev can see the timing belt vibrate like gitar string but not hitting anything so probably not timing belt
3) engine oil issue? but just change 2K km ago - luqui moli 10w40
Workshop 1 suspect
Engine mounting - since no power loss just weird sound and vibration but 2nd workshop check and say no prob with the mounting
workshop 2 suspect
1) timing belt - checked and confirmed nothing wrong though noted the belt vibrating
2) crank pulley bolt loose - checked and confirmed not it
3) air cond compressor loose, knocking against something - also confirmed not it
4) possible engine internal issue
end up they say have to leave car there to check but have to wait till after CNY as got so many cars now and they also on holiday for CNY
appreciate if anyone has some pointers on how to solve this.
right now the car is still drivable without the weird grinding sound as long as i keep it below 4k rpm but i dont think i want to leave it till the sound is there at all rpm or till something breaks
Thats what i can think of if there is timing belt slipped.
And might be tensioner faulty too. I dunno. My 2 cents only.