5.0 Engine Whine

I just got my car back from the shop. {I was rear ended) Now it makes
a really high pitched whine when idling and under light load. When I
put a little more load on it, it sounds like it goes away but im not
sure, my exhaust is to loud to hear much.

I took the accesory belt off and started the car, and it was still
there. So i know its not the idler, water pump, a/c, or alt.

I dont even know where to start as I am a novice with cars.

-Evan

OK..... manual or standard trans? Was it spanked hard enough to move the
differential forward? Does the noise vary with RPM? Is the noise from the
front of the motor? Rear of the motor? Further back in the car?

You're there, we're not... you need to be our eyes as well as ears and we
need to know everything.


"Evan" > wrote in message
om...
>I just got my car back from the shop. {I was rear ended) Now it makes
> a really high pitched whine when idling and under light load. When I
> put a little more load on it, it sounds like it goes away but im not
> sure, my exhaust is to loud to hear much.
>
> I took the accesory belt off and started the car, and it was still
> there. So i know its not the idler, water pump, a/c, or alt.
>
> I dont even know where to start as I am a novice with cars.
>
> -Evan

Could it be your throwout bering? You said it whines at idle. When you
hear it whine try pushing on the clutch lightly at first , then slowly
apply more pressure to the clutch and see if the noise increses,
decreses , or goes away all together. Test it and let know. There are
a bunch of smart guys in this group, I am sure if you give them
adequate and accurate information they can find your little tick.






On 20 Nov 2004 16:41:49 -0800, (Evan) wrote:

>I just got my car back from the shop. {I was rear ended) Now it makes
>a really high pitched whine when idling and under light load. When I
>put a little more load on it, it sounds like it goes away but im not
>sure, my exhaust is to loud to hear much.
>
>I took the accesory belt off and started the car, and it was still
>there. So i know its not the idler, water pump, a/c, or alt.
>
>I dont even know where to start as I am a novice with cars.
>
>-Evan

The car is a 66 with a 91 5.0, t-5 and 9". The sound starts once the
engine is warmed up. It sounds very much like a horn that is not
recieving full power.
It happens when idling (in neutral or in gear), and when the engine is
under light load. I cant tell if it goes away with more load, because
my exhaust is too load. It sounds like it is coming from the back of
the engine.

But I figured it out. Its the PCV line. It was sucked close and was
humming and viberating. I just replaced the line and PCV valve a
couple of months back when I changed the oil. I did not put the filter
back in, I was told it was just a restriction.

What would cause this? I know they can get gunked up, but this fast?

-Evan

Evan opined in om:

> I just replaced the line and PCV valve a
> couple of months back when I changed the oil. I did not put the filter
> back in, I was told it was just a restriction.
>
> What would cause this? I know they can get gunked up, but this fast?

A RESTRICTION!!!!! To WHAT!!

That filter is a primarily an oil separator... if it's a "restriction", then
it's just doing its job. Yeah, they get gunked up with condensation and some
contaminants... but the oil splash cleans them off somewhat... but YOUR BUDS
dont understand the cycle... so NOW the gunk gets inside your PCV instead...
wonder why!

Stop paying attention to guys around the freaking water cooler and think for
yourself about why Ford would put it there!

But good for you for finding it!

Backyard Mechanic opined in :

> Evan opined

>>
>> What would cause this? I know they can get gunked up, but this fast?
>
Driving habits: Infrequent use + short trips = more condensation/oil sludge

>
> That filter is a primarily an oil separator... if it's a "restriction",
> then it's just doing its job. Yeah, they get gunked up with
> condensation and some contaminants... but the oil splash cleans them off
> somewhat...

I suggest you use Mobil 1 oil, drive car for at least a half hour at least 1
of every four start-ups... dont just start car for 5 minutes and shut it off.

You NOW need to clean up your engine, if the PCV is that sludged, Mobil 1
and 500 mile filter change plus longer trips will do it.

Purolator or Motorcraft filters

Backyard Mechanic opined in :

> Backyard Mechanic opined in :
>
>> Evan opined
>
>>>
>>> What would cause this? I know they can get gunked up, but this fast?
>>
> Driving habits: Infrequent use + short trips = more condensation/oil
> sludge
>

>

And if these same geniuses told you 180 deg thermostat was "better", take
that out and put in a 192, as the 5.0 gods intended.

That would ALSO cause sludge buildup.

Backyard, I took my mesh filter out years ago and my PCV has never
clogged up on me ever. I even reused it when I did a Windsor swap.
It is just a check valve they can be cleaned.




On Mon, 22 Nov 2004 15:53:41 GMT, Backyard Mechanic
> wrote:

>Evan opined in om:
>
>> I just replaced the line and PCV valve a
>> couple of months back when I changed the oil. I did not put the filter
>> back in, I was told it was just a restriction.
>>
>> What would cause this? I know they can get gunked up, but this fast?
>
>A RESTRICTION!!!!! To WHAT!!
>
>That filter is a primarily an oil separator... if it's a "restriction", then
>it's just doing its job. Yeah, they get gunked up with condensation and some
>contaminants... but the oil splash cleans them off somewhat... but YOUR BUDS
>dont understand the cycle... so NOW the gunk gets inside your PCV instead...
>wonder why!
>
>Stop paying attention to guys around the freaking water cooler and think for
>yourself about why Ford would put it there!
>
>But good for you for finding it!

I would have thought that the word "filter" might mean something.... As ByM
mentioned, this is an air/oil separator and it has a job to do. As far as it
being a restriction..... the PCV valve itself is much more restrictive than
the mesh. I would serve everyone well to take a step back and gain an
understanding of how and why the PCV valve is there in the first place.

At high intake manifold vacuum, the PCV is essentially closed (unless you
have a real long cam) and the only flow through the valve is a tiny orofice.
This works out OK for the crankcase because we're not building big cylinder
pressures and blow-by shouldn't be much of a concern (unless we're driving
junk). As we open the throttle, manifold vacuum decreases and cylinder
pressures increase.... the PCV unseats and allows more flow. KOEO, the PCV
is in it's wide open position.

In the small block Ford, high rpm can pump a LOT of oil into the valve
covers..... enough that the lack of the air/oil separator *may* allow oil to
enter the intake tract. Oil in the combustion chamber can lead to detonation
and detonation can lead you to pulling your wallet out of your pocket (it
will likely be very thin when you put it back).

Gunk on the PCV may be an indication of less than adequate oil, poor
maintenance, not allowing the motor to come to full operating temp too often
or an indication of poor cylinder sealing (or a combination of two or more
of these conditions).

Now... seeing that the motor appears to be out of a newer car and there is a
chance that we are all thinking in terms of late 60's PCV systems when we
should be thinking in terms of modern PCV systems....... If the filter you
are talking about s on the upstream (intake) side of the PCV system and is
either soft foam or pleated paper..... then this is an air filter. It would
be filtering dust out of the air that is entering your motor (what a unique
concept) and some of the guck on the PCV would be that small portion of dirt
that isn't busy kicking the crap out of your engines guts.

But I'm over 40 and likely not trustworthy....


"Carver" > wrote in message
news
> Backyard, I took my mesh filter out years ago and my PCV has never
> clogged up on me ever. I even reused it when I did a Windsor swap.
> It is just a check valve they can be cleaned.
>
>
>
>
> On Mon, 22 Nov 2004 15:53:41 GMT, Backyard Mechanic
> > wrote:
>
>>Evan opined in om:
>>
>>> I just replaced the line and PCV valve a
>>> couple of months back when I changed the oil. I did not put the filter
>>> back in, I was told it was just a restriction.
>>>
>>> What would cause this? I know they can get gunked up, but this fast?
>>
>>A RESTRICTION!!!!! To WHAT!!
>>
>>That filter is a primarily an oil separator... if it's a "restriction",
>>then
>>it's just doing its job. Yeah, they get gunked up with condensation and
>>some
>>contaminants... but the oil splash cleans them off somewhat... but YOUR
>>BUDS
>>dont understand the cycle... so NOW the gunk gets inside your PCV
>>instead...
>>wonder why!
>>
>>Stop paying attention to guys around the freaking water cooler and think
>>for
>>yourself about why Ford would put it there!
>>
>>But good for you for finding it!
>