Timing Belt Done - Is my car knocking?
Driver
Joined: Nov 2013
Posts: 183
Likes: 1
From: Finland
Here's mine for comparison. It seems loud but for some reason the garage walls and roof amplified the sound. This is hot idle with Mobil 1 0W-40.
You could also try how yours sounds without the plastic cover on top of the engine in case that is "rattling" or vibrating.
You could also try how yours sounds without the plastic cover on top of the engine in case that is "rattling" or vibrating.
Driver School Candidate
Joined: Nov 2019
Posts: 1
Likes: 1
From: AL
Video included below.
Maybe I am dreaming but my car idle sounds different than prior to me replacing my timing belt and water pump. Timing checked multiple times, not sure what else could have changed.
The car is very new to me and I am very new to the LS so perhaps its all in my head but I "thought" my car was near silent at idle prior to the work.
Is this a knock?
Please give it a listen and tell me what you think, some of you guys are freaking LS geniuses and I am learning a lot.. so thank you /bow
http://youtu.be/flL8WhmYDeE
Maybe I am dreaming but my car idle sounds different than prior to me replacing my timing belt and water pump. Timing checked multiple times, not sure what else could have changed.
The car is very new to me and I am very new to the LS so perhaps its all in my head but I "thought" my car was near silent at idle prior to the work.
Is this a knock?
Please give it a listen and tell me what you think, some of you guys are freaking LS geniuses and I am learning a lot.. so thank you /bow
http://youtu.be/flL8WhmYDeE
10th Gear
Joined: Jun 2023
Posts: 14
Likes: 0
From: TX
1999 same issue
Hi
Did you figure out what was the issue?
I just replaced the timing belt on my 99, like you I double checked the timing and everything else but now the valves are knocking on both sides. I drove the car a few miles and not changed.
Did you figure out what was the issue?
I just replaced the timing belt on my 99, like you I double checked the timing and everything else but now the valves are knocking on both sides. I drove the car a few miles and not changed.
Advanced
Joined: May 2001
Posts: 650
Likes: 7
De you fix yours?What did you find out?
10th Gear
Joined: Jun 2023
Posts: 14
Likes: 0
From: TX
Intermediate
Joined: Oct 2022
Posts: 345
Likes: 80
From: NY
The original video reminds me of a similar sound I had on my 95 after doing a certain repair. It turned out a plastic cover had been improperly reinstalled and it scared me because I was wondering if the engine was knocking it was so loud. My guess is one of the various plastic covers needs to be reinstalled or snugged back down correctly. Also some of the covers have these rubber gaskets that line the edges to create a seal that can fall out.
Last edited by as99east; Nov 16, 2025 at 06:32 AM.
Thread
Thread Starter
Forum
Replies
Last Post
acarapella
ES - 1st to 6th Gen (1990-2018)
12
Sep 29, 2019 04:26 PM
Bayliner
ES - 1st to 6th Gen (1990-2018)
12
Aug 29, 2013 02:29 PM
lnguyenh
LS - 3rd Gen (2001-2006)
12
Apr 9, 2011 07:28 AM
VJZ
SC - 1st Gen (1992-2000)
1
Feb 12, 2008 09:34 AM
