03 s55 valve train tick or chattering sound
Thread Starter
Member
Joined: Jun 2023
Posts: 82
Likes: 5
98 SL500 sport
I would suggest doing wires next if you did coil packs and plugs. (2) areas of note, 1st, its possible the wires aren't all the way seated, as i noticed the first time i did mine i didn't seat them properly. secondly, just buy new wires all together and you can rule that out. Keep a note as to the orientation of the longer and shorter wires, as i believe from the factory some of the coil packs have (2) short wires, and some have a mixture of long and short together. I'm not 100% sure but i just eyeballed it and i think i still have some mixed up. Particularly towards the front where it seems i should have longer wires for some of the plugs. Who the hell knows. Replace the wires and make sure you seat them all really well, one by one.
- Joe
- Joe
Thread Starter
Member
Joined: Jun 2023
Posts: 82
Likes: 5
98 SL500 sport
I'm going to pull the super charger belt today and see if that affects that misfire feeling during issle and low RPMs and that rattling chain noise towards the rear of the engine on cylinder 7 . I don't see a chain there and wonder if it's coming from the super charger 🤔 I haven't been able to find a diagram of what's going on inside that supercharger yet parts wise I did change to lucas super charger oil that's rated for that application but am thinking about going to mobil jet 2 . That rattling chain sound is in close proximity to the noisy lifter I wonder if that's possible a rocker arm that's bad and that noise is just manifesting in a confusable way 🤔 I wish I could figure out how to upload the video I have I'm sure somone would know within a split second what it is 😤
Senior Member
Joined: Oct 2011
Posts: 320
Likes: 185
From: Philadelphia
2002 CLK55 AMG: 2004 S55 AMG: 2009 C63
Step 1: Take your phone out and record a video.
Step 2: Come back online, on your phone, and open up this thread
Step 3: In the top of the "Quick Reply box" you will see where you can BOLD ITALIC UNDERLINE ETC....keep looking to the right and you will see a little picture frame next to the smiley face. Click the picture frame.
Step 4: Click "Browse your device".
Step 5: Select the video in your phots and then click "Upload". It will then upload the video into the Reply box and you can post it in here.
Hope that helps you help us help you
Step 2: Come back online, on your phone, and open up this thread
Step 3: In the top of the "Quick Reply box" you will see where you can BOLD ITALIC UNDERLINE ETC....keep looking to the right and you will see a little picture frame next to the smiley face. Click the picture frame.
Step 4: Click "Browse your device".
Step 5: Select the video in your phots and then click "Upload". It will then upload the video into the Reply box and you can post it in here.
Hope that helps you help us help you
Last edited by PHILLYCLSJOE; May 18, 2025 at 09:13 AM.
Thread Starter
Member
Joined: Jun 2023
Posts: 82
Likes: 5
98 SL500 sport
Step 1: Take your phone out and record a video.
Step 2: Come back online, on your phone, and open up this thread
Step 3: In the top of the "Quick Reply box" you will see where you can BOLD ITALIC UNDERLINE ETC....keep looking to the right and you will see a little picture frame next to the smiley face. Click the picture frame.
Step 4: Click "Browse your device".
Step 5: Select the video in your phots and then click "Upload". It will then upload the video into the Reply box and you can post it in here.
Hope that helps you help us help you
Step 2: Come back online, on your phone, and open up this thread
Step 3: In the top of the "Quick Reply box" you will see where you can BOLD ITALIC UNDERLINE ETC....keep looking to the right and you will see a little picture frame next to the smiley face. Click the picture frame.
Step 4: Click "Browse your device".
Step 5: Select the video in your phots and then click "Upload". It will then upload the video into the Reply box and you can post it in here.
Hope that helps you help us help you
Thread Starter
Member
Joined: Jun 2023
Posts: 82
Likes: 5
98 SL500 sport
Well it's not the coils and wires. I swapped those out today. It is idling a little stronger but that misfiring feeling is still present. I'm going to smoke test it but I wonder if it's a fuel injector which would be possible. They are the stock injectors at $25,000, mi on a 25-year-old car
Thread Starter
Member
Joined: Jun 2023
Posts: 82
Likes: 5
98 SL500 sport
ran a smooth engine test at idle and noticed cylinder 4 kept bumping up into the 5.xx range . this was the only cylinder behaving this way . from what ive read 7-10 is a misfire . ive yet to get the smoke tester from a friend to see if its a leak however the rubber grommet in the rear of the supercharge did fall out when I was installing there valve cover gaskets . I did find it and reinstall it but I wonder if the grommet could be the issue ? any thoughts or experience with this specific vacuum line / grommet being an issue ?
