knocking
03-10-2009, 10:50 PM
#1
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knocking
ok i bought my car 2 weeks ago and a few times ive started my car and their was 2 knocks from under the hood. i didnt know it needed premium till a week ago so it probably had 1 or more full tanks of regular gas through it so i just wanted to know is it just this or is it something else? its already gone through over half a tank of premium should i just take it to a mechanic and have him do a general check of the car?
03-10-2009, 10:58 PM
#3
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you havent even stated what you own.
have you beaten on the car
and knocking is never a good noise, unless you are mistaking valve train, or injector noise as knocks.
have you beaten on the car
and knocking is never a good noise, unless you are mistaking valve train, or injector noise as knocks.
03-10-2009, 11:24 PM
#8
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not to be a dick but, really, how could you not know that regular gas cant go in it? you really shouldnt be driving a sports car if you know jack **** about them. ANY car that has ANY forced induction doesnt run on regular unleaded. period.
Yes, you have run the chance of ruining your pistons. I would highly recommend you take it to a mechanic, NOT THE DEALER, they will automatically say your warranty has been voided. and if i was you, i would continue to put premium in it until it either dies or whatnot. and if it does die, do not tell them that you put regular gas in the car.
commence the standing in a corner, and smack yourself in the head.
Yes, you have run the chance of ruining your pistons. I would highly recommend you take it to a mechanic, NOT THE DEALER, they will automatically say your warranty has been voided. and if i was you, i would continue to put premium in it until it either dies or whatnot. and if it does die, do not tell them that you put regular gas in the car.
commence the standing in a corner, and smack yourself in the head.
03-10-2009, 11:25 PM
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so i should take it to the shop for a look?
i dont think a tank of regular really did that much
i dont think a tank of regular really did that much
Last edited by prvdoughnut; 03-10-2009 at 11:25 PM. Reason: Automerged Doublepost
03-10-2009, 11:27 PM
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ive had a knocking sound on my car sence i bought it brand new but my noise is not coming from my engine its coming from the back of the car i normally hear it about a min or two after i start my car and my car is at idle.
03-10-2009, 11:30 PM
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not to be a dick but, really, how could you not know that regular gas cant go in it? you really shouldnt be driving a sports car if you know jack **** about them. ANY car that has ANY forced induction doesnt run on regular unleaded. period.
Yes, you have run the chance of ruining your pistons. I would highly recommend you take it to a mechanic, NOT THE DEALER, they will automatically say your warranty has been voided. and if i was you, i would continue to put premium in it until it either dies or whatnot. and if it does die, do not tell them that you put regular gas in the car.
commence the standing in a corner, and smack yourself in the head.
Yes, you have run the chance of ruining your pistons. I would highly recommend you take it to a mechanic, NOT THE DEALER, they will automatically say your warranty has been voided. and if i was you, i would continue to put premium in it until it either dies or whatnot. and if it does die, do not tell them that you put regular gas in the car.
commence the standing in a corner, and smack yourself in the head.
03-10-2009, 11:31 PM
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it says premium recommended not required right in the manual. just thought if it could be anything else and if it might go away with a few tanks of premium
i said 2007 chevrolet cobalt ss
i said 2007 chevrolet cobalt ss
Last edited by prvdoughnut; 03-10-2009 at 11:31 PM. Reason: Automerged Doublepost
03-10-2009, 11:32 PM
#13
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03-10-2009, 11:52 PM
#16
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knocking is pre detonation of fuel. they have harmful effects on the pistons and rings. the fuel explodes before its suppose to, making a knocking noise. however your vehicle is not boosted, thus you should fine but i recommend sticking with what the minimum requirements for your motor.
03-11-2009, 12:00 AM
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ok i heard it 3 times in total twice when i had regular in the tank and once just a few minutes ago if it happens anymore i should just take it to the mechanic?
03-11-2009, 12:05 AM
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ive only heard it when starting and only three different times i live up north in mass and its been pretty cold outside maybe tht has something to do with it. it is always just 2 knocks.
03-11-2009, 12:31 AM
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since it doesnt make the sound every time i start it i dont know ill check tomoro morning and see becuz if its from the trunk i heard about the ghosts in the trunk and thts nothing to worry about. so ill check tht in the morning
03-11-2009, 12:35 AM
#25
That happened a time or two with my old Tahoe when I hadn't driven it in while. I wonder if there's some oil leaking past inside the engine somewhere when it's sitting and when you start you have something of a hydraulic lock until it blows out the oil..