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1998 Ford Ranger engine noiise

Tiny
JIM BERNARD
  • MEMBER
  • 1998 FORD RANGER
  • 6 CYL
  • 4WD
  • MANUAL
  • 107,000 MILES
When I start the engine, particularly on cold mornings after a night of 20degrees, there is a knock in the engine that lasts 2-3 sconds, then goes away. The engine has been well maintained, with oil changes at 5,000 mile intervals.
Please tell me its not the valves! What could be the possible causes? Thanks for your help.
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Monday, March 22nd, 2010 AT 2:19 PM

1 Reply

Tiny
2CARPRO JACK
  • MECHANIC
  • 11,533 POSTS
Sounds like it may be the bottom of the engine not getting oil right away. Since this only happens in the cold, try using a lighter weight of oil, like maybe a 5w-20 or something like that, designed to circulate faster in cold weather. Higher weights like 10w-40 are better for hot weather when temps are up and you want a slightly thicker oil. Also be sure you are using the correct, high quality filter
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Tuesday, March 23rd, 2010 AT 2:34 PM

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