|
In Reply to: Re: Please Help... Strange knocking noise... posted by dudel on August 19, 2001 at 20:31:04:
No 2) it's possible, but I only hear the knocking sound at idle or when I give it a slight gas and the knocking sound speeds up..
No 3) why do injectors make noise?? it never did this before
No 4) I think a stretched timing chain can cause this problem when it rubs up against the valves... and yes the M50 engine has a timing chain..
Thanks
Not sure I can help with the info provided, but there goes.
1) knocking sound where you describe it (engine cover - did you mean valve cover) is likely valve lash. When was the last time your valves were set?
2) Another source of knocking sound is preignition. Does not ususally happen during idle, but rather under load (so I'd rule that out).
3) Injectors can make quite a noise. As you accelerate the individual knocks kind of merge together and fade under the rest of the engine noise.
4) I suppose a chain (does this engine have a chain?) could make the noise you describe.
I'd listen with a mechanics stethoscope and try to pinpoint the noise. Failing a stethoscope, try holding a large screw driver to the various engine parts (be carefull) and press the handle portion of the screwdriver to your ear. See if you can identify the area where the sounds are the loudest.
Hope this helps.
Don
My car, a 1993 525ia is making a strange knocking sound inside the engine cover... Everything else about the car seems fine, engine idling very smooth, no noticeable vibration, good gas mileage, accelerates without a glitch.. I did have one strange experience coming off a highway off ramp to a standstill last week and the car hesitated and felt like it might die, and then started to idle slightly higher and problem went away.. Anyone have any ideas???
Thanks in advance.. Want to hear any opinions before I take it to my mechanic tomorrow morning..
© 1997 -
2009
Jump Internet Inc. All rights reserved.
