2001 Ford Taurus Knocking at startup

Tiny
TEXASTAURUS
  • MEMBER
  • 2001 FORD TAURUS
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 97,000 MILES
I have a 2001 taurus and when I start it up I hear a knocking nosise, and it last for just a 1/2 min then goes away. Then when I am driving and come to a stop light I hear that same nosise and it goes away very quickly. It doesn't use any oil or has any performance problems, I drive 60 miles round trip everyday and change the oil as called for. Whats up?
Wednesday, December 16th, 2009 AT 8:58 AM

6 Replies

Tiny
MMPRINCE4000
  • MECHANIC
  • 8,548 POSTS
Start by checking oil pressure with mechanical gauge.
On a cold engine you would want at least 40-60psi.

If OK, then change oil and run magnet through used oil looking for any metal particles.

If OK, then you could have a accessory drive problem, like a tensioner or pulley.

On cold engine, remove serpentine belt, start engine and run for 30 seconds, you will get alt. Light come on, but you are looking to see if knocking goes away.
If it does, then you have isolated problem to assy. Side.

If you still have the knock after above and there are no metal particles in oil, remove flexplate (flywheel) inspection plate and check that all bolts to flexplate are tight and none are missing.
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Wednesday, December 16th, 2009 AT 9:26 AM
Tiny
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What if I find metal in oil? Sounds like the noise is coming from the top of the engine area.
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Wednesday, December 16th, 2009 AT 11:17 AM
Tiny
MMPRINCE4000
  • MECHANIC
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Metal would indicated a bearing wear problem and would require extensive repair.

Hopefully is is an oil pressure problem that has not affected the bearings yet.
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Thursday, December 17th, 2009 AT 8:15 AM
Tiny
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Any idea to the cost of getting the oil pressure checked? Oil level is good and clean.
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Thursday, December 17th, 2009 AT 11:02 AM
Tiny
MMPRINCE4000
  • MECHANIC
  • 8,548 POSTS
Should not take more than an hours labor. They remove the electrical oil pressure sender and replace with a fitting connected to hose with gauge.

Crank and start engine and look at actual oil pressure in engine.

If low, could be an oil pump, oil pump pick up, clogged oil galley.
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Friday, December 18th, 2009 AT 9:36 AM
Tiny
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I really appreciate that. Thanks a bunch, I talked to a mechanic and he said with that many miles I need to go to a 10w 30 thicker oil
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Friday, December 18th, 2009 AT 10:54 AM

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