Potential problem has cropped out. Had a timing belt done on my 94 Accord LX. Now when quickly accelerating, I hear a "whine". This only happens when I "get on" the gas pedal. When idling, I dont hear it. As soon as I let go of the gas pedal it stops. If I accelerate smoothly I do not hear it.
The whine is hard to describe. Almost "electric". High-pitched. I WOULD NOT describe it as a constant squealing noise.
I had a complete timing belt change done (tensioners + seals). As well as a complete tuneup (cap, rotor, plugs, wires) done.
Any ideas? I will approach the tech who worked on my car next week, but wanted an idea of where to look.
If you are referring to the engine accesory drive belts then yes that's a possibility. The drive belts are easy to overtighten and can create a high pitched wine if they are too tight.
On the other hand an overtightened timing belt could also cause a high pitched wine. There is a procedure when installing a timing belt to set the tension, and its possible that the technician that worked on your car was un-aware of that, and just "guessed" on the tension.
The correct way to set the timing belt on your engine is as follows:
-loosen the timing belt tensioner bolt (be sure engine is a TDC on cyl #1)
-rotate the crankshaft counterclockwise three teeth on the cam gear
-tighten the tensioner bolt to 33 ft. Lbs.
The turning of the engine at that exact position in the combustion cycle puts an exact amount of tension on the timing belt, and is what's used to judge tension on the belt.
Last edited by AccordInTheMaking; 02-13-2009 at 02:03 PM.
How time consuming is the procedure to loosen the timing and/or balancer belt? I hope this is something that doesnt take 3 hours of labour.
Well if you bring it to a shop to be done it will probably be about 2 hrs. flat rate at least (Involves removing the drive belts and PS/alternator, removing the crank pulley/harmonic balancer, front cover, etc.) - but honestly if they didnt do it right the first time, then they should fix it for free.
OR.... if you have 10, 12, 14, and 17mm sockets, a ratchet, and a couple other basic hand tools you can do it yourself quite easily (a manual for your vehicle helps if your unfamiliar with the process).
By the way, you said you really cant hear the "whine" at idle, more or less just only when on the gas. Its possible that just the tightness that they have it at, and a few other variables, may mean in your case its only noticable at a higher RPM, who knows, or it could be something else causing the noise- but I would still suspect the belt tensions first.
Good call. Was in another shop for a second opinion, and they diagnosed a bad tensioner. They actually took of each belt, started the car and heard the whine. All belts were off and there was still a whine.
Not sure how to proceed. The second shop said its a serious issue.
I dealt with that on the very first timing belt replacement. The shop owner said the the whine would go away when the new belt was broken in. I said there was no whine five years earlier when I drove it off the dealers lot with 20 miles on it. He then got his guy to take it apart and adjust the tension.
93 Honda Accord EX Sedan MT 225,000
I re-tensioned my timing belt this past weekend after installing a cam. Didn't have to pull the crank pulley off, or even remove the lower timing cover. Took about 20 minutes to pull it apart, tension, and put it back together.
The goal is NOT to spray much, just enough where the belt enters the power steering pulley because that's where it will make noise if it's slipping. If the noise changes or goes away that means the issue is that belt...it needs to be tightened...or try the alternator belt. If the noise doesn't change on either belt then your issue is related to the timing belt area. If that's the case, then you can loosen the timing belt tensioner bolt a couple turns without taking the bolt off and turn the crank pulley COUNTER-CLOCKWISE a few revolutions slowly. Then tighten the tensioner bolt again and restart the engine and check for the noise.
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