2009 Pontiac Vibe What is causing the engine to screech just as it turns over?
What is causing the engine to screech just as it turns over?
What is your question?
The problem occurs only after the car has sat overnight or for at least 3 hours. It doesn't make the sound every time. Sometimes it doesn't make it for a few days, sometimes it makes the sound twice a day (if 3+ hours have passed since last turning it on). My car has always had regular oil changes. I have had the following things replaced but the noise still happens: Timing chain, starter (Sept, 2018), new battery (6/2019), Ignition coil assembly, spark plugs, AND tightened loose belt (8/6/2020) - the next day it made the noise again. It hasn't gotten better or worse. It is as if it is acting on its own unrelated to anything. I am concerned that something is being worn down or damaged that can't be detected (or won't be until it breaks). Anyone want to chime in? It started in Sept. 2017 and no one has been able to figure it out cuz it won't make the noise while they have the "stethoscope" ready. Naturally. Thank you!
What makes this problem better or worse?
I gave you all the info.
How long has your 2009 Pontiac Vibe had this problem?
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What I have found during the 46 years of being in the auto repair business is the noise you described is classic drive belt slippage - explanation follows.
Starting the engine after extended park takes the more charge from the battery than any other operation.- the alternator has to work a little harder to put that charge back in the battery - more load on alternator = belt slippage occurs..
It is likely if you turned the headlights on for a few minutes with engine off THEN start engine - you’ll hear this screech noise.
Has the serpentine belt been replaced? ... Has the belt ‘tensioner’ been checked?
Good luck!
I see you stated “tightened loose belts” - that is NOT possible - - the belt tensioner is self contained and provides tension adjustment automatically - no manual adjustment is provided.
There is only one belt.
I see you stated “tightened loose belts” - that is NOT possible - - the belt tensioner is self contained and provides tension adjustment automatically - no manual adjustment is provided. There is only one belt.