Screeching sound after starting engine
 

I have a 1999 3.0L volvo engine that has developed a loud screeching sound
that lasts for 2 - 5 seconds after starting. Originally I thought it was a
belt, but the belts all look fine. It makes this noise when the engine is
cold. The sound is not the starting motor bendix. I am suspecting a bearing
on either the alternator, power steering pump, or water pump, or maybe
something internal to the water pump. When I take off the belts and turn
these pullies, they all turn freely except for the water pump (volvo has a
belt driven water pump on the engine, not in the outdrive, that pulls the
water in). I can turn this pully but it is very hard to turn. Should this be
hard to turn by hand? I am now suspecting that this may be the root of my
screeching sound. Maybe a new impeller and/or bearings are in order?

--
John A

Screeching sound after starting engine
 

water pump should turn freely

SP

"John A" wrote in message
...
I have a 1999 3.0L volvo engine that has developed a loud screeching sound
that lasts for 2 - 5 seconds after starting. Originally I thought it was a
belt, but the belts all look fine. It makes this noise when the engine is
cold. The sound is not the starting motor bendix. I am suspecting a
bearing
on either the alternator, power steering pump, or water pump, or maybe
something internal to the water pump. When I take off the belts and turn
these pullies, they all turn freely except for the water pump (volvo has a
belt driven water pump on the engine, not in the outdrive, that pulls the
water in). I can turn this pully but it is very hard to turn. Should this
be
hard to turn by hand? I am now suspecting that this may be the root of my
screeching sound. Maybe a new impeller and/or bearings are in order?

--
John A

Screeching sound after starting engine
 

is the starter dis-engaging?

"John A" wrote in message
...
I have a 1999 3.0L volvo engine that has developed a loud screeching sound
that lasts for 2 - 5 seconds after starting. Originally I thought it was a
belt, but the belts all look fine. It makes this noise when the engine is
cold. The sound is not the starting motor bendix. I am suspecting a
bearing
on either the alternator, power steering pump, or water pump, or maybe
something internal to the water pump. When I take off the belts and turn
these pullies, they all turn freely except for the water pump (volvo has a
belt driven water pump on the engine, not in the outdrive, that pulls the
water in). I can turn this pully but it is very hard to turn. Should this
be
hard to turn by hand? I am now suspecting that this may be the root of my
screeching sound. Maybe a new impeller and/or bearings are in order?

--
John A

Screeching sound after starting engine
 

Yes, I am fairly sure the starter is disengaging. I have heard that type of
sound before. Its not a metallic sound. This sounds more like a very loud
belt squeal. A previous responder (Splitpair) is saying that the to pump
pulley should turn freely. probably time to pull the pump and at take a look
inside.

--
John A
"Kevin Anderson" wrote in message
. net...
is the starter dis-engaging?

"John A" wrote in message
...
I have a 1999 3.0L volvo engine that has developed a loud screeching
sound
that lasts for 2 - 5 seconds after starting. Originally I thought it was
a
belt, but the belts all look fine. It makes this noise when the engine
is
cold. The sound is not the starting motor bendix. I am suspecting a
bearing
on either the alternator, power steering pump, or water pump, or maybe
something internal to the water pump. When I take off the belts and turn
these pullies, they all turn freely except for the water pump (volvo has
a
belt driven water pump on the engine, not in the outdrive, that pulls
the
water in). I can turn this pully but it is very hard to turn. Should
this
be
hard to turn by hand? I am now suspecting that this may be the root of
my
screeching sound. Maybe a new impeller and/or bearings are in order?

--
John A

Screeching sound after starting engine
 

"John A" wrote in message
...
I have a 1999 3.0L volvo engine that has developed a loud screeching sound
that lasts for 2 - 5 seconds after starting. Originally I thought it was a
belt, but the belts all look fine.

Does "looking fine" include being tight? This is a typical symtom of a
belt that is not tight enough. When the engine starts, and the belt is cold,
the poor belt friction has a tough time getting one of the pulleys to start
turning. After the belt slips for a few seconds the friction heats the belt
up and its grip improves. Once the pulley starts to turn it is far easier
to keep it turning so it doesn't slip any more.

When I take off the belts and turn
these pullies, they all turn freely except for the water pump (volvo has a
belt driven water pump on the engine, not in the outdrive, that pulls the
water in). I can turn this pully but it is very hard to turn. Should this
be
hard to turn by hand?

If this is the circulating pump (like a car would have) then it should
turn freely.

If this is the raw water pump, which contains the rubber impeller, then it
would have a significant amount of resistance to turn, especially when it is
"dry". This is why you can't run the engine on the trailer without
providing water to the inlet, as this friction will quickly cause the
impeller to heat up and self destruct.



I am now suspecting that this may be the root of my
screeching sound. Maybe a new impeller and/or bearings are in order?

First, make sure all the belts are tight.

Second, change the impeller. If you haven't changed it in the last couple
of years then it needs to be replace anyway.

If that doesn't fix the problem, then try to eliminate which device is or
isn't causing the problem. If you have more than one belt, try removing one
and start the engine (just briefly). If it still squealed, you can rule out
anything driven by just that one belt. If the squeal stopped, then either
that belt was too loose or something it is driving is too tight.

Rod

Screeching sound after starting engine
 

On Sun, 19 Oct 2003 09:27:56 +0000, John A wrote:

I have a 1999 3.0L volvo engine that has developed a loud screeching sound
that lasts for 2 - 5 seconds after starting.

Try removing the squirrels from the exhaust manifold ;)

We had a cat that liked to sleep on the warm electric motors that ran the
milking machine. Dad fired it up once, and the cat had it's tail caught in
the pulley. REAWWWWW...BANG! The "bang" was the cat hitting the ceiling.
Took us 3 days to find the poor thing - renamed "no-tail" afterwards.

Lloyd Sumpter
"Far Cove" Catalina 36

Screeching sound after starting engine
 

I thought I had the belts tight enough; as this was my first theory for the
source of the noise. Last night I took apart the raw water pump and removed
the impeller (wow that was easy). It did not have any worn flat spots,
however, there were a couple of large chunks mssing from a couple of the
impeller blades. Also the rubber impeller was dry and relatively hard. I
have a volvo shop manual and it says that the impeller should be lightly
lubricated with grease. There was definitely no lubrication left on this 4
year old impeller. I will replace, adjust belt to proper tension, and see
what happens. I am thinking that this was likely the source of my noise.
--
John A

"Rod McInnis" wrote in message
...

"John A" wrote in message
...
I have a 1999 3.0L volvo engine that has developed a loud screeching
sound
that lasts for 2 - 5 seconds after starting. Originally I thought it was
a
belt, but the belts all look fine.

Does "looking fine" include being tight? This is a typical symtom of a
belt that is not tight enough. When the engine starts, and the belt is
cold,
the poor belt friction has a tough time getting one of the pulleys to
start
turning. After the belt slips for a few seconds the friction heats the
belt
up and its grip improves. Once the pulley starts to turn it is far easier
to keep it turning so it doesn't slip any more.

When I take off the belts and turn
these pullies, they all turn freely except for the water pump (volvo has
a
belt driven water pump on the engine, not in the outdrive, that pulls
the
water in). I can turn this pully but it is very hard to turn. Should
this
be
hard to turn by hand?

If this is the circulating pump (like a car would have) then it should
turn freely.

If this is the raw water pump, which contains the rubber impeller, then
it
would have a significant amount of resistance to turn, especially when it
is
"dry". This is why you can't run the engine on the trailer without
providing water to the inlet, as this friction will quickly cause the
impeller to heat up and self destruct.



I am now suspecting that this may be the root of my
screeching sound. Maybe a new impeller and/or bearings are in order?

First, make sure all the belts are tight.

Second, change the impeller. If you haven't changed it in the last couple
of years then it needs to be replace anyway.

If that doesn't fix the problem, then try to eliminate which device is or
isn't causing the problem. If you have more than one belt, try removing
one
and start the engine (just briefly). If it still squealed, you can rule
out
anything driven by just that one belt. If the squeal stopped, then either
that belt was too loose or something it is driving is too tight.

Rod

Screeching sound after starting engine
 

"Lloyd Sumpter" wrote in
:

On Sun, 19 Oct 2003 09:27:56 +0000, John A wrote:

I have a 1999 3.0L volvo engine that has developed a loud screeching
sound that lasts for 2 - 5 seconds after starting.


In my siytuation it was the alternator causing the noise and after awhile I
would get the black belt dust allo over the motor. The cure was to replace
the alternator.

Screeching sound after starting engine
 

"John A" wrote in message
...
Also the rubber impeller was dry and relatively hard. I
have a volvo shop manual and it says that the impeller should be lightly
lubricated with grease. There was definitely no lubrication left on this 4
year old impeller.

The grease is to aid in re-assembly. With all the water flowing through
the pump, the grease will be gone in minutes. Don't worry about greasing
your impeller other than for initial assembly.

Rod

Screeching sound after starting engine
 

bob wrote:
"Lloyd Sumpter" wrote in
:

On Sun, 19 Oct 2003 09:27:56 +0000, John A wrote:

I have a 1999 3.0L volvo engine that has developed a loud screeching
sound that lasts for 2 - 5 seconds after starting.


In my siytuation it was the alternator causing the noise and after
awhile I would get the black belt dust allo over the motor. The cure
was to replace the alternator.

Did you notice if the alternate pulley turned freely by hand when the pulley
was removed with no noticable noise/binding? If so, they you just reduced my
confidence that I an on the right track. Oh well, I will know soon enough.
It was time to change the impeller anyway.

--
John A