1998 Chevy Malibu Knocking

Tiny
ENGLISHREDS2
  • MEMBER
  • 1998 CHEVROLET MALIBU
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 120,000 MILES
My father changed the oil, and after the oil change he started the engine which is a 2.4 twin cam, there is a noise wich sounds like marbles in the valve trane so we replaced the motor and same problem. The noise sounds like it is on the top end. We tore the original top end apart and found nothing thats is a obivious problem. I am at ends meet with this and most despertly need help. So please please help
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Friday, September 24th, 2010 AT 9:46 PM

3 Replies

Tiny
MADMIKE1735
  • EXPERT
Remove the oil pan, check the oil pickup screen. May be clogged, and not allowing adequate oil to your top end. Also, try adding some lucas oil additive, see if this helps any.
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Friday, September 24th, 2010 AT 9:50 PM
Tiny
ENGLISHREDS2
  • MEMBER
I found a nut on the magnet of the drain plug. I think this nut goes to the cover to the balance shaft or aleast it fits. Now the chain is pretty loose, is there a way to tighten it? Could this be the noise? The screen doesnt look bad as for clogs or any thing.
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Saturday, September 25th, 2010 AT 12:08 PM
Tiny
MADMIKE1735
  • EXPERT
It is very possible thats your noise. I cant attach the diagram, because the program im using isnt allowing it. Anyways, this is what I have for you.

REMOVAL PROCEDURE

CAUTION: Refer to Battery Disconnect Caution in Service Precautions.

Disconnect the negative battery cable.
Remove the engine oil pan. Refer to Oil Pan Replacement.
Remove the balance shaft chain cover. Refer to Balance Shaft and Housing Replacement.
Remove the balance shaft chain tensioner bolt.

Remove the balance shaft chain tensioner.
INSTALLATION PROCEDURE

Install the balance shaft chain tensioner.
IMPORTANT: A brass feeler gauge needs to be used in order to ensure correct measurements are obtained. If a steel gauge is used, it well not bend in order to conform to the guide and it will allow for incorrect measurements.

Adjust the balance shaft drive chain tension by inserting a 1 mm (0.040 inch) brass feeler gauge between the chain guide and the chain. Press the guide against the chain using about three pounds of force.
Tighten the chain tensioner fastener.
Tighten the bolts to 13 Nm (115 inch lbs.).
NOTICE: Refer to Fastener Notice in Service Precautions.

Install the balance shaft chain cover. Refer to Balance Shaft and Housing Replacement.
Install the balance shaft chain cover nut and bolt.
Tighten the nut and bolt to 13 Nm (115 inch lbs.).
Install the oil pan gasket.
Install the oil pan.
Connect the negative battery cable.
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Saturday, September 25th, 2010 AT 8:15 PM

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