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grinding scraping and knocking noise Hyundai
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sasv83
New User
Mar 19, 2014, 1:07 PM
Post #1 of 6
(1910 views)
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grinding scraping and knocking noise Hyundai
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Hi I have a 2008 Hyundai Accent GLS car with about 97k miles. I am having a lot of trouble with my car...a week ago I noticed that my car made a pinging sound when I accelerated. I switched to a higher octane of gas thinking that it would be a temporary fix for a leaky fuel injector. Then today the car started to knock and ping, there was a loud scraping noise, and the brakes seem like they were harder to operate. Do you have any ideas of what this could be? Any advice would be very helpful. Thanks! Also, I recently had my timing belt and water pump replaced.
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Mar 19, 2014, 2:05 PM
Post #2 of 6
(1895 views)
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Re: grinding scraping and knocking noise Hyundai
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I think something failed with the timing belt job and you should have that checked asap. Brakes more difficult is probably a side effect of low vacuum assist power due to low intake manifold vacuum. When that's wrong the engine just doesn't know what to do.
Hurry and have the belt/pump work checked out,
T
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sasv83
New User
Mar 24, 2014, 5:21 PM
Post #3 of 6
(1851 views)
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Re: grinding scraping and knocking noise Hyundai
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Thanks for your advice. It turns out that it was the control arm. I'm glad that I didn't drive it further than around the corner to the auto mechanic or else my wheels might have come completely off! 
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Mar 25, 2014, 2:00 AM
Post #4 of 6
(1840 views)
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Re: grinding scraping and knocking noise Hyundai
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Glad it's fixed. The moral of this story is that noises are difficult to describe vs on-sight inspection by tech. Words used naturally differ as well.
When a tech hears of complaint of "knock" or "ping" at least speaking for myself it leads me to engine knocks and pings as in fuel firing all wrong at the wrong time not a suspension component!
Noises are warnings never to be ignored as it's chiefly unknown if just an annoyance or a serious safety issue as this seems to have been and would have suggested not to drive this at all!
Did you get an explanation as to what the problem was with this control arm? Worn out, left loose or broken in some way?
If that was plain wear over time and use I am surprised there wasn't more warning or that it was noticed a lot sooner,
T
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sasv83
New User
Mar 25, 2014, 5:14 AM
Post #5 of 6
(1831 views)
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Re: grinding scraping and knocking noise Hyundai
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Yeah I do not know a lot about cars but thought it was the engine too. I am glad it isn't and will be a lot cheaper to fix (our mechanic is charging us $250). I don't know why the control arm went bad, but I live in New York State and there has been a lot of snow and salt this year. It's been making a bell like sound when accelerating and then last week all of a sudden it turned to a crunching, squeaking and knocking noise and also sounded like something was dragging. I also saw that Kia/Hyundai recalled the control arms on the Tiburon minivan. Maybe the other models are having the same problem, I don't know. Thanks so much for giving suggestions. I like sites like this so that I can figure out what might be wrong with stuff since I do not know much about it. 
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Mar 25, 2014, 6:41 AM
Post #6 of 6
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Re: grinding scraping and knocking noise Hyundai
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From inland Mass. so no stranger to rust issues usually first noticed as we know as ugly body metal rust showing but definitely causes real harm to structural metals as well and can quickly.
Now I suggest if one side did this how carefully was the other side checked out? Guess this should be on your list of things to check or have checked to be ahead of such problems. Brands don't seem to matter all the time just some seem to fare better than others up to generating recalls as losing wheels and total control of a vehicle is wildly dangerous made worse as it can happen by total surprise!
Do learn and enjoy learning from sites such as this. This particular site is free to use and a volunteer site from regulars likely to reply to you.
All the suggestions and even pics are inadequate compared to plain looking at and inspecting something in person, extent of rust and how important will vary.
If it moves you have to pay attention. Good luck,
Tom
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