Noise motor engine noise

If your 2007 Chevy Impala is making a clicking noise before the key is even inserted into the ignition, it could be caused by a few different issues. Some potential causes include:

1. Faulty starter motor: The starter motor is responsible for starting the engine when the ignition is turned on. If the starter motor is faulty or has worn out, it may make a clicking noise as it tries to engage with the flywheel.
2. Loose or damaged starter motor relay: The starter motor relay is an electrical component that sends power to the starter motor when the ignition is turned on. If the relay is loose or damaged, it may cause a clicking noise.
3. Low battery: If the battery is low on charge or has gone bad, it may not have enough power to start the engine, causing a clicking noise.
4. Other electrical issues: There may be other electrical issues, such as a loose connection or a problem with the ignition switch, that are causing the clicking noise.

To determine the cause of the clicking noise, it is recommended to bring your vehicle to a mechanic or a dealership for further diagnosis and repair. They will be able to test the starter motor, battery, and other electrical components to determine the source of the problem and recommend the appropriate repairs.

inline 6
xr6 is this a turbo"?
is car stock (original)?
the first is compression tests, at wide open throttle.
exact engine by whom not sure, but is this interference engine?>
chain, drive cams.
noise is never good, find it.
is this SOHC or DOHC, or tell exact motor name,
lets see if wiki does these cars.... its poor, cant even find real ford names for it.
for the BA-BF & FG XR6Turbo, ?

if this is a DOHC engine, say so first. as we never crank them
after noise, ever. we do a leak down tests. BY HAND.
if that fails , the valves are bent, and do not crank engine ever
until the bends are gone; "learn how to respect DOHC engines"

I am guessing here but from your description of the problem you took the easy option and replaced a broken motor with another broken motor . Replacement motors should run sweet with no more extra noise than a new engine

celunoid ?? SOLENOID ! Could be starter , test ! VOLTAGE DROP TESTING .

Starter Voltage Drop

What size engine ???
Starter Motor, 4.6L C1020
Lower right side of engine Starter Motor, 5.4L C1020
Lower right side of engine

Starter Motor Relay, 4.6L C166
Right rear of engine compartment C167
Right rear of engine compartment Starter Motor Relay, 5.4L C166
Right rear of engine compartment C167
Right rear of engine compartment

This is hard to say with hearing the noise but try to pin point the noise , is it coming from the top or bottom of the motor , the knocking noise could be a bearing in the lower motor or may be something else making it sound like a bearing,

This is probably tappet noise from the top end of the engine. However you should have it looked at quickly as these engines had a severe problem with oil sludging, even when recommended services were done.
This caused all sorts of problems, so see if you can get it fixed before the engine develops something terminal.
http://www.enginebuildermag.com/Article/66958/sludgy_saab_may_rattle_your_chain.aspx

you have 3 choices.
1) Bad battery
2)Starter motor solenoid is inoperative or starter motor itself is inoperative
3) your engine is locked up
How old is your battery and are the connections to the starter motor good?
Do you hear a clicking noise when you try to start the engine?
Do you have a clunk noise when you try to start it?

If dirty connections then clean the terminals andtry to start engine.
Clicking noise means starter solenoid is picking up but starter motor is disunctional and needs replacement.
If the noise is a clunk then your engine is locked up for whatever reason.
Last but not least if you hear the starter motor runningand a metalic grinding then the star is bad on the starter motor which means replacement of same.

It is probably the wheel bearings they have been known for that.

When you say new parts, does that mean cranck bearings and rod bearings?
Is the noise from the top or bottom?
Top noise could be lifters or rocker arms.
Bottom noise could be crank or rod bearings.
Oil pressure?

Yes the idler pulley can make noise, but not very common. It can do it though.