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I have 2013 dodge grand caravan with a 3.6 engine. I notice on cold start that I hear a squealing noise from the engine which only lasts for a few seconds.

This only happens when the temp is very cold and does not happen when starting later in the day.

  • Welcome to Motor Vehicle Maintenance & Repair! More than likely your serpentine belt is squealing at the alternator. – Pᴀᴜʟsᴛᴇʀ2 Mar 7 at 22:48
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It is most likely because of a cold belt. Easy to test. Take belt off and start the car. If theres no squeal its the belt. If there is still squealing, you have bigger problems.

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In cases like that,and i see it day in ,day out, in the shop,most most likely it's the ALTERNATOR belt that needs tightening;

The reason it quiets down afterwards,is because the alternator already replenished the battery charge that was spent by the starter,and also,it's warming up,getting a better grip; stil..it NEEDS tightening,(renew it,if it is very old!)it will only get worse;

There is an easier way to test ,to make sure: get a garden hose,(or just a pitch with water)and totally wet the belt and its pulleys as it is turning(engine idling): the water will act as a lubricant,and the slipping belt(if it's the case) will completely stop squealing; the water dries in seconds and all goes back to what it was like before again,but you got your answer.

  • Bar soap in not as messy as water. – blacksmith37 Aug 5 at 14:57
  • No can do! First,you'd lose fingers bringing the soap to the running belt; Second,you DO NOT want soap,or any other slippery stuff on your belt!!!!Ever!!! Water,and water only; that WILL do the job; sorry,but others also need to know the proper way. – V8sUndead Aug 6 at 22:33
  • Did it many times in "V" belt days Also with my solid chunk of belt rosin which was was smaller than bar soap. GM V-8 s usually ran 3 V belts so you had to be careful. – blacksmith37 Aug 8 at 14:11
  • Rosin YES!!! that's the BEST stuff,not soap. – V8sUndead Aug 9 at 15:57

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