Question about 1994 Buick Skylark

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I got my oil changed because it had alot of slugg in the oil so it was changed and now i hear tapping in the engine what could that be?

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  • mechanic144 May 11, 2010

    did they use a good quality oil? sometimes quality stuff makes the difference...the stuff for $.99 per litre does not protect as good as the stuff for $4.75 per litre...it could also be that you just never noticed the noise before you got your oil changed and now its just more noticeable..its also possible that they used a thinner grade oil..if you have been running 10w30 and they used 5w30, that may make a notice able sound....if they flushed the engine with that oil change as well, then you just freed up all the lifter and rockers and stuff that had all the sludge build up and they are now able to work freely without strain..

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Its possible to have bearing in the lower end making a sound and the reason you weren't hearing it before was because the sludge was probably to thick and you might also have an oiling problem

Posted on Nov 14, 2009

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