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strange noise under the hood
Posted: Fri Aug 29, 2003 10:50 am
by mark-b
A strange noise has just started under the hood. It an intermitent crackling sound which kind of sounds like hot cooking oil when you drop some water into it. Its not loud but loud enough for me to pick it up. It makes the sound about every few seconds. It sounds like it is coming from somewhere at the top of the engine. I have just done an oil change, not sure if there is a connection or not. Its the only thing I have done to the car and the sound started after the oil change. Does anyone have any ideas on this??? Mark
Posted: Fri Aug 29, 2003 6:37 pm
by ciper
Is this when the engine is under heavy load, idling or?
Posted: Fri Aug 29, 2003 7:12 pm
by Brat4by4
Oil dropping onto the exhaust pipe on the passenger side of the engine can make such a sound. Look for a leaking valve cover gasket (very common problem). Do you smell the reek of oil after you stop driving?
Posted: Fri Aug 29, 2003 8:12 pm
by ciper
I was thinking it sounded more like a combustion problem.
Posted: Sat Aug 30, 2003 12:05 am
by mark-b
Hi guys, thanks for the tips. It makes the sound when its cold or hot when it is idling. There is No smell of oil. Im thinking maybe there is some oil residue from when I replaced the oil filter. (it was a messy job with oil running out when I unscrewed it) Mark
Posted: Sat Aug 30, 2003 1:34 am
by entirelyturbo
I was gonna say, are you sure your a/c line isn't dripping condensation onto your cat? I've had that before, but you said it happens when it's cold...
Posted: Sat Aug 30, 2003 4:28 am
by ciper
Does it make the same sound after you turn the car off from a long time of driving?
Posted: Sat Aug 30, 2003 10:58 am
by mark-b
It doesnt make the sound after I turn off the engine after a long run. Im going to check to see if it happens from cold just in case I was dreaming. I noticed that the sound is a little worse when the air-con is on......
Posted: Sat Aug 30, 2003 2:26 pm
by magicmike
what you really need to do is get in there for a better look. You should be able to see something. We cant see or hear whats going on so its difficult. I say if you stare at it long enough you will find at leaste where the noise is coming from (i.e. a part or something). I think you need to narrow it down for us somehow.
Good luck and happy listening
Posted: Sun Aug 31, 2003 1:19 pm
by mark-b
Hi guys, Sorry for being vague with my description of the problem. It doesnt make the noise from cold. subyluvr2212 you are on to it, I have narrowed it down to the A/C. I drove with it off on a long run and no noise. I turned on the A/C and the noise started up. Maybe Im low on refridgerant gas. I will investigate the a/c further. Mark