Ticking noise when accelerating
#1
Member
Thread Starter
Ticking noise when accelerating
It was really nice in LA today, so I drove with the windows down to enjoy the soundtrack our cars make. I noticed when accelerating past 3k rpm, or during acceleration with a transmission kick-down, I'll hear two metallic 'tick' sounds coming from the engine. It feels like one from each side, right after the other, and then just normal engine acceleration noises.
I don't feel the timing is being pulled due to detonation, and the acceleration still feels linear. It's repeatable at each stop light or whenever the car's been stopped and that type of acceleration is needed.
I checked around the exhaust manifolds and didn't really see any signs of leaking, but I'll admit I don't really know what to look for. No check engine lights or any of that.
Any idea what it could be? Are there secondary intakes that open at certain rpms or throttle positions that could be producing this noise?
Thanks for any help!
I don't feel the timing is being pulled due to detonation, and the acceleration still feels linear. It's repeatable at each stop light or whenever the car's been stopped and that type of acceleration is needed.
I checked around the exhaust manifolds and didn't really see any signs of leaking, but I'll admit I don't really know what to look for. No check engine lights or any of that.
Any idea what it could be? Are there secondary intakes that open at certain rpms or throttle positions that could be producing this noise?
Thanks for any help!
#5
Member
Thread Starter
I appreciate the response! This could be something totally normal, like the engine pivoting under load, or it could be something not so normal. I'll get to the bottom of it one way or another.
![Smilie](https://mbworld.org/forums/images/smilies/smile.gif)
#6
Super Member
I have a 2012 C63 and it does not make any unusual noise when I accelerate. Mind you I often hear a very loud exhaust sound and some tyre noise followed by a traction control unit noise. Come to think of it, I hear that all the time!
Stay in good health.
Stay in good health.
#7
Member
Thread Starter
Hah, that's generally what I hear too. Maybe it's my car revolting against the crappy California summer blend fuel we've switched over to in the past month. 91 octane is the highest we get, and I'll bet that's really not 91. Time to find some stations that sell racing fuel!
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#9
MBWorld Fanatic!
matt, are you out having fun with your car without me? lol. i have a ton of strange noises, but not the one you mention ...
#12
Member
Thread Starter
![Smilie](https://mbworld.org/forums/images/smilies/smile.gif)
The 76 @Pico has 100 octane gas for $10/gallon, but I wonder how fast the ECU adapts to it? To get to 93 average in the tank, I think we'd need about 4 gallons of it mixed with 91. I'm willing to give it a shot to see if it solves the ticking noise.
#13
MBWorld Fanatic!
A buddy filled his CTS-V up with me at the Chevron on Westwood and Santa Monica Blvd and is experiencing pinging as well. So here's a good use case for our cars burning through a tank of fuel as quickly as they do
Also, that Chevron has now been blacklisted forever!
The 76 @Pico has 100 octane gas for $10/gallon, but I wonder how fast the ECU adapts to it? To get to 93 average in the tank, I think we'd need about 4 gallons of it mixed with 91. I'm willing to give it a shot to see if it solves the ticking noise.
![Smilie](https://mbworld.org/forums/images/smilies/smile.gif)
The 76 @Pico has 100 octane gas for $10/gallon, but I wonder how fast the ECU adapts to it? To get to 93 average in the tank, I think we'd need about 4 gallons of it mixed with 91. I'm willing to give it a shot to see if it solves the ticking noise.
#14
Member
Thread Starter
#15
MBWorld Fanatic!
#16
Member
Thread Starter
No, and of course I thought about that as I was driving away. I have an appt w/them tomorrow for brakes so I'll ask him then.
#18
Junior Member
It was really nice in LA today, so I drove with the windows down to enjoy the soundtrack our cars make. I noticed when accelerating past 3k rpm, or during acceleration with a transmission kick-down, I'll hear two metallic 'tick' sounds coming from the engine. It feels like one from each side, right after the other, and then just normal engine acceleration noises.
I don't feel the timing is being pulled due to detonation, and the acceleration still feels linear. It's repeatable at each stop light or whenever the car's been stopped and that type of acceleration is needed.
I checked around the exhaust manifolds and didn't really see any signs of leaking, but I'll admit I don't really know what to look for. No check engine lights or any of that.
Any idea what it could be? Are there secondary intakes that open at certain rpms or throttle positions that could be producing this noise?
Thanks for any help!
I don't feel the timing is being pulled due to detonation, and the acceleration still feels linear. It's repeatable at each stop light or whenever the car's been stopped and that type of acceleration is needed.
I checked around the exhaust manifolds and didn't really see any signs of leaking, but I'll admit I don't really know what to look for. No check engine lights or any of that.
Any idea what it could be? Are there secondary intakes that open at certain rpms or throttle positions that could be producing this noise?
Thanks for any help!
#19
Member
Thread Starter
^To me that sounds like the footwell trim / cabin filter area is rattling a little, or it's something in the cowl near the HVAC intake/blower is loose and permeating through into the cabin.
#20
Junior Member
![Frown](https://mbworld.org/forums/images/smilies/frown.gif)
Anyway, this I believe this to be motor related since it only happens when cold, and it follows the revs at 1500-2000rpm goes away once 100F oil temp or so,
and adding oil to dipstick max level drastically improves this, but sound is faint still.
I’m guessing just normal lifter wear noise but I was wondering if anyone has had this properly diagnosed, and/or if some guru can just warn me that my car is about to blow up. Haha