I have a 1990 DB1 and when it starts to rev high it starts to make a high pitched whine noise, it sounds like it is coming from the engine but I am not lacking power or anything.
I also understand that it could be a number of belts or pulleys that could be causing this annoyance.
I recently had a neighbor put a new alternator in, Plus my rpms where ideling at around 2000 and he dropped them back down to just under 1000 at idle.
Any ideas on what to look/check for on this situation?
+1 for me. I have this too. its not my belts i just changed those and i just put a new alternator in also. its a newer timing belt too. Could it be from inside the motor? it sounds like its coming from inside the valve cover. it has always been like that since i owned the car, never getting worse. it only gets noticeable when the car has been driven for at least 10-15 minutes. Transmission maybe???
I was thinking possibly the transmission but I am not sure on what to think, I am gonna try to get it into the shop tomorrow and see what they have to say about it
I had a high pitched whining noise that would come and go with different RPM’s. Turns out it was the A/C tensioner pulley. It was almost completely seized up, I could barely turn it by hand. If you changed all the belts and still have the noise it might be worth checking.
I pulled off my ac crap. i still think its the motor though cause its not coming from the tranny side so much as it is coming from the middle to top of the motor.
Did your A/C not function as well as it should when your A/C tensioner was seized up?
I’m getting a noise from that area too and I’ve checked the belts. I thought it was the alternator bearing at first but at this point I think it’s something else in the belt area. I do have A/C issues. The hi and low side are both within proper PSI, and the air is nice and cold right at the vent, but it doesn’t flow strongly.
it might be your valve clearances. they need to be adjusted every XXXXX miles.
[QUOTE=crackahcrackah;2135738]Did your A/C not function as well as it should when your A/C tensioner was seized up?
I’m getting a noise from that area too and I’ve checked the belts. I thought it was the alternator bearing at first but at this point I think it’s something else in the belt area. I do have A/C issues. The hi and low side are both within proper PSI, and the air is nice and cold right at the vent, but it doesn’t flow strongly.[/QUOTE]
I didn’t notice it working any differently. If you’re not getting strong airflow from the vents that would be due to your blower motor. Or possibly the air location isn’t completely blocking off, i.e. when set to the front vents you might be getting a lot of leaking through the floor vents or defroster.
its not that sound, i have that also, an excessive ticking noise, but this is very different. it sounds like a supercharger. very odd. never gets better but never got worse
I also have this noise on my 90 Ls. My friends father and i have came to the conclusion that the noise wasnt there before we changed the tensioner but it was there after the tensioner was changed, the tensioner is brand new. we think the tension on the belt is tighter than usual so thats why the sound is there. i really dont see how anything in the head itself could make this noise, i dont think valve clearance would be the culprit either, that would make a tapping noise. im not saying im completely right, im no honda mechanic by a long shot. if im wrong let me kno so my problem can get solved as well! haha
i have come to the conclusion that it may be the crank pulley. Is there like a seal behind there that could be worn?