Question about 1997 Pontiac Grand Prix

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My car seems to be loosing oil and its vibrating what could be the problem

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Well it depends where the oil is leaking in front of the motor is usually the front seal on the crankshaft in between the trans and motor is usually the rear main seal and any where else could only be the pan gaskets or a hole in your oil pan,and with the vibration does it do it when just sitting still?If so probably missing on a couple of cylinders or a blown head gasket /or arcing in the spark plug wires probably a tune up would take care of it ,or you have bad valves in the head it could be a number of things,if it's doing it only when you put on the brakes your brakes need servicing or just going down the road /could be your tires /tie-rod ends/ball joints ??????? Be more specific(when what how where)and you usually get your why

Posted on Mar 24, 2011

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When sitting at a red light my Mazda 3 idles real funny...vibrating almost sounding like a cats purr?


2006 Mazda 3


Applies to 2006 Mazda Mazda3:
Available engines
4 Cylinders 2.0L MFI DOHC
4 Cylinders 2.3L MFI DOHC


Could be a number of things - you're going to end up checking the entire car.

Off the top of my head:
a) exhaust component has rusted loose (usually catalytic converter heat shield). Any loose exhaust component (hanger/muffler, etc.) will vibrate at idle.
b) glove compartment door - loose hinge
c) motor mount - rubber part of metal/rubber mount vibrates loose & falls out.
d) transmission mount - ditto.

The Maintenance manual for your car says:

Clicking noise at idle or driving
--------------------------------------------
1 Inspect Main (Crankshaft) Bearing - Excessive Bearing Clearance.
1 Inspect Rod Bearing - Incorrect Rod or Main Bearing Clearances.
2 Inspect Rocker Arm - Worn or Incorrectly Adjusted Rocker Arm(s).
3 Inspect Piston Ring Set - Worn or Broken Piston Rings.
4 Inspect Piston - Worn, Damaged, or Faulty Piston.
5 Inspect Fuel Line Assembly - Fuel Line Leaking.
6 Inspect Hose Clamp - Loose or Missing Fuel Line Clamps.

Tapping noise at idle
------------------------------
1 Inspect Valve Lifter - Insufficient Oil Supply.
2 Inspect Fan Blade - Broken, Missing, or Faulty Fan Blade(s).
3 Inspect Oil Pump Screen - Clogged Oil Pump Screen.
4 Inspect Oil Pump Drive Gear - Damaged or Faulty Oil Pump Drive Gear.
5 Inspect Exhaust Valve(s) - Burned, Worn, or Sticking Exhaust Valves.
6 Inspect Oil(Crankcase)Capacity - Lifters Need Additional Lubrication.
7 Inspect Oil Filler Cap - Oil Filler Cap Damaged or Missing.
8 Inspect Oil Pump - Damaged or Faulty Oil Pump.
9 Inspect Oil Filter - Old or Clogged Oil Filter.
10 Inspect Oil FLow Check Valve - Damaged or Faulty Oil FLow Check Valve Caused Loss of Oil Pressure.

Vibration while Accelerating
-----------------------------------------
1 Inspect CV Half-Shaft (Remanufactured) CCT - Worn or Damaged CV Half-Shaft.

vibration while braking
--------------------------------
1 Inspect Brake Rotor - Warped or Uneven Brake Rotor Surface.

Vibration while driving - entire vehicle
-----------------------------------------------------
1 Inspect Brake Rotor Specs - Warped or Uneven Brake Rotor Surface.
2 Inspect Ball Joint-Lower - Worn, Damaged, or Faulty Ball Joint.
3 Inspect Ball Joint-UPPER - Worn, Damaged, or Faulty Ball Joint.
3 Inspect Wheel Bearing-Front - Worn, Dry or Damaged Wheel Bearing.
5 Inspect Tie Rod End - Worn or Damaged Tie Rod Ends.
6 Inspect Wheel Bearing-Rear - Worn, Dry or Damaged Wheel Bearing.
7 Inspect Wheel Hub Bearing - Worn, Dry or Damaged Wheel Hub Bearing.

Vibration in rear axle area while driving
-----------------------------------------
1 Inspect U-Joint - Loose, Worn, or Damaged U-Joint.
2 Inspect Driveshaft - Bent, Loose or Unbalanced Driveshaft.
4 Inspect Differential Drive Pinion - Worn, Damaged or Broken Pinion Teeth.
4 Inspect Wheel Bearing-Rear - Worn, Dry or Damaged Wheel Bearing.
5 Inspect Pinion Bearing - Worn or Damaged Pinion Bearings or Yolk Shaft.


Vibration in steering wheel while driving
---------------------------------------------------------
1 Inspect Wheel Bearing-Rear - Worn, Dry or Damaged Wheel Bearing.

Vibration in tire/wheel area while driving
------------------------------------------
1 Inspect Wheel Bearing-Front - Incorrectly Tightened or Installed Wheel Bearing.

Vibration under vehicle while driving
---------------------------------------------------
1 Inspect U-Joint - Loose, Worn, or Damaged U-Joint.
2 Inspect Muffler - Damaged or Burned Out Muffler.

Vibration in rear wheeel area while driving
------------------------------------------------------------
1 Inspect Wheel Bearing-Rear - Worn, Dry or Damaged Wheel Bearing.

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2 Answers

The check engine light stays on after oil change. When you apply the brakes the steering wheel vibrates and there is a weird humming type noise coming from the rear while idling.


Hope the oil filter was changed and with the OE type and the correct oil grade.
If so the oil pressure switch can be clogged and so produce the check engine light.
When applying brakes the steering vibrates as it can be due to faulty linkages in steering column, problem in the hydralics pump or fault in the steering rod bearings.
finally the weird noise from rear can be from a faulty exhaust , leak or poor joint in the exhaust or vibration of the exhaust with loose mountings.

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1 Answer

My car is having a lite oil leak and i want be able too get it the shop until Wednesday so what should i do?


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while driving at higher speeds you may not notice a sound as much as when you are drivng in reverse as you usually drive slower in reverse. This leads me to think that the rattling can be caused by a loose protective plate under the car. When a load is put on the engine, it tends to vibrate more this vibration can cause a lose plate to rattle more. This is the cheap answer. That is if you are definitely sure the sound is coming from under the vehicle. Otherwise, you may have a crank shaft problem or a seal in the bottom half of the motor could be bad. You may want to crawl under the car and try to shake some of those plates underneath. If none of them are loose take the car to BMW it shouldn't cast anything for them to look at it unless they have to hook it up to the computer.
Please remember that if you intend to climb crawl under your car, you must make sure that your car is properly supported to prevent serious injury. Also, if your driving with a loose plate, it could easily fly off while driving or if you hit a bump. This could cause serious damage to your vehicle. Also, please check you oil levels and make sure you do not have an oil pressure light coming on when you hear this noise.

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