# 2000 Buick LeSabre - Knocks **URL:** \ **Category:** Maintenance/Repairs\ **Tags:** buick\ **Created:** [December 18, 2019, 3:54am UTC](https://community.cartalk.com/t/2000-buick-lesabre-knocks/154894 "2019-12-18T03:54:51Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![daysl33per](https://avatars.discourse-cdn.com/v4/letter/d/82dd89/32.png) [@daysl33per](https://community.cartalk.com/u/daysl33per)\ **Post date:** [December 18, 2019, 3:54am UTC](https://community.cartalk.com/t/2000-buick-lesabre-knocks/154894/1 "2019-12-18T03:54:51Z")
Hey my first car (make model& year listed) has been making some concerning sounds. I just bought it and when I start it up there’s a feint _knock_ RIGHT when in starts. Just once and only during the starter function. Any idea what it could be? Should I be concerned? Thanks a lot ! ---
**Author:** ![Mustangman](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/mustangman/32/44130_2.png) [@Mustangman](https://community.cartalk.com/u/Mustangman)\ **Post date:** [December 19, 2019, 12:24am UTC](https://community.cartalk.com/t/2000-buick-lesabre-knocks/154894/2 "2019-12-19T00:24:14Z")
All knocks are bad. You should be concerned. I suspect the previousm owner was concerned, too, so they sold it to you. I am guessing you did not have this inspected by a mechanic before you bought it, correct? You should have a mechanic check it now. ---
**Author:** ![Scrapyard-John](https://avatars.discourse-cdn.com/v4/letter/s/f6c823/32.png) [@Scrapyard-John](https://community.cartalk.com/u/Scrapyard-John)\ **Post date:** [December 19, 2019, 12:30am UTC](https://community.cartalk.com/t/2000-buick-lesabre-knocks/154894/3 "2019-12-19T00:30:58Z")
I hate to disagree, but I have to. One feint knock at startup…I just wouldn’t sweat that too much. Check the oil, and motor on. ---
**Author:** ![davepsinbox\_157004](https://avatars.discourse-cdn.com/v4/letter/d/73ab20/32.png) [@davepsinbox\_157004](https://community.cartalk.com/u/davepsinbox_157004)\ **Post date:** [December 19, 2019, 2:48am UTC](https://community.cartalk.com/t/2000-buick-lesabre-knocks/154894/4 "2019-12-19T02:48:50Z")
Gotta agree, with the provision that it depends on the sound. When you first start the car there’s minimal oil in the upper parts. That leads to some slight clattering. I wouldn’t necessarily ignore it but check the oil, add if necessary, get it changed, and keep an eye on it. ---
**Author:** ![George\_San\_Jose1](https://avatars.discourse-cdn.com/v4/letter/g/e5b9ba/32.png) [@George\_San\_Jose1](https://community.cartalk.com/u/George_San_Jose1)\ **Post date:** [December 19, 2019, 2:54am UTC](https://community.cartalk.com/t/2000-buick-lesabre-knocks/154894/5 "2019-12-19T02:54:12Z")
A motor/transmission mount problem could cause this. Cranking the engine accelerates the crankshaft and that causes the engine to want to rotate in the other direction. The mounts prevent that from happening, but if they are worn out and there’s some play in the mounts it could cause a knocking sound during cranking. Any good mechanic could assess the engine mounts for you without too much trouble. If you wanted to try something yourself, open the hood and watch the engine while a helper cranks it. Notice any unusual movement happening, consistent with the sound? ---
**Author:** ![SteveCBT](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/stevecbt/32/3192_2.png) [@SteveCBT](https://community.cartalk.com/u/SteveCBT)\ **Post date:** [December 19, 2019, 3:02am UTC](https://community.cartalk.com/t/2000-buick-lesabre-knocks/154894/6 "2019-12-19T03:02:01Z")
Add a can of Restore to the oil, if that does not stop the knocking then look for mounts as @George_San_Jose1 mentions. I had a ~98 Chevy V6 and when it got up in miles, it liked to chatter a bit. Restore took care of it.