Engine tick at idle - Mercedes-Benz Forum
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post #1 of 19 (permalink) Old 08-31-2018, 09:20 AM Thread Starter
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Engine tick at idle

Got an S430 (not mine) with an engine tick at idle, sounds like it's on the left side (cylinder bank 5-8). You can hear it as you rev up the engine a little bit (it goes faster as the engine does), but it goes away. It's a bit louder when the engine's warmed up. It's louder than either of my S430's or the project 2000 S500. It's most noticeable when you pull up next to another car or a wall, or if you're standing outside the engine bay. You don't really hear it if you're inside the car with the windows rolled up.

The engine has plenty of power, seems to pull just fine, doesn't blow smoke, no drivetrain codes, no misfires, transmission not slipping, etc. Just that louder-than-I'm-used-to tick. Haven't taken the valve covers off yet, but like most W220's now, it's about due, and the owner's cool with that.

Been searching the BenzWorld forums for "engine tick m113", and nothing. Searching Google shows me lots of information for the M119 engine and the oil guides, but not quite as much for the M113 (does it even have these M119-style oil guides?). Some folks suggested either valve lifters or the EGR valve, but according to various posts out there (including BenzWorld), stuck valve guides happen when the engine's cold, and that goes away as the engine warms up.

https://www.benzworld.org/forums/w22...30-03-a-2.html
https://www.benzworld.org/forums/w22...0-ticking.html

If anything, it's almost the opposite, i. e. it's a a little bit quieter (not much) at cold-start and then gets to full loudness as the engine warms up.

IIRC, Dave made a suggestion as to what to look at. It was something in the oil pan, I think. I'm having trouble finding that post.

Can y'all be of some assistance?

Thanks!

2000 S430 (Dad's car, used for special occasions)
2000 S500 (best friend's--now WIFE's--DD: my first W220 project car, once gone to, and now returned from, an excellent home--welcome back home, baby!)
2003 S430 (one of two current DD's--second W220 project car)
2003 S600 (third w220 project car, "sex on wheels")
2005 E320 CDI (the other current DD--first W211 project car)
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post #2 of 19 (permalink) Old 09-01-2018, 01:33 AM
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Hi @cowboyt ,

Sound's like it could be a Hydraulic Valve Lifter

EGR doesn't tick, nor do Valve Guides unless completely shagged

But at rear of Engine Bay, left of Car is a small Solenoid Valve, (Can Purge) that ticks, but not as loud as yours seems from your description

First thing, use stethoscope / screwdriver to ear to make sure it is coming from under Valve / Cam Cover.

If so lets use the "Idle the Engine for ages hot, with a real decent Flushing Oil method" ....................

Follow instructions on the tin, but try and get the type that requires Engine Idling, and double the time it says on the tin, and the quantity !!

Then remove Oil Filter, drain Oil, take Small Sump Pan at front of Engine off, check and clean Oil Pick Up Strainer if neccessary. Clean Pan and replace, New Oil Filter, and refill with, "wait for it" ......................

"Uncle Tom Cobbly's (or whatever Religion)" 0W/40 Full Synthetic with the correct MB Approval(s)

HTH,

Cheers Dave
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Last edited by Dave2302; 09-01-2018 at 01:37 AM.
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post #3 of 19 (permalink) Old 05-17-2019, 06:10 PM
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Quote:
Originally Posted by Dave2302 View Post
Hi @cowboyt ,

Sound's like it could be a Hydraulic Valve Lifter

EGR doesn't tick, nor do Valve Guides unless completely shagged

But at rear of Engine Bay, left of Car is a small Solenoid Valve, (Can Purge) that ticks, but not as loud as yours seems from your description

First thing, use stethoscope / screwdriver to ear to make sure it is coming from under Valve / Cam Cover.

If so lets use the "Idle the Engine for ages hot, with a real decent Flushing Oil method" ....................

Follow instructions on the tin, but try and get the type that requires Engine Idling, and double the time it says on the tin, and the quantity !!

Then remove Oil Filter, drain Oil, take Small Sump Pan at front of Engine off, check and clean Oil Pick Up Strainer if neccessary. Clean Pan and replace, New Oil Filter, and refill with, "wait for it" ......................

"Uncle Tom Cobbly's (or whatever Religion)" 0W/40 Full Synthetic with the correct MB Approval(s)

HTH,

Cheers Dave
Dave,

I happened to be reading this and was wondering where is the " Small Sump Pan " located. DO you happen to have a pic of it?? Thanks!!
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post #4 of 19 (permalink) Old 05-17-2019, 09:44 PM
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The best engine flush is good old dexron ATF transmission fluid
Pour a quart in and idle the car for 20 minutes then drain and refill with correct oil
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post #5 of 19 (permalink) Old 05-18-2019, 02:10 AM
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Bottom of Engine underneath at front of Engine
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post #6 of 19 (permalink) Old 05-18-2019, 05:11 AM
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Bottom of Engine underneath at front of Engine
You mean the lower pan?? This it??


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post #7 of 19 (permalink) Old 05-18-2019, 05:14 AM
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The best engine flush is good old dexron ATF transmission fluid
Pour a quart in and idle the car for 20 minutes then drain and refill with correct oil
^^ Agree!! Also a very good product is EPR from BG. You should see the crap that came out my wife's car when I used it Haven't used it on the Mercedes since when I did the valve covers, it was sparkly clean in there. Maybe I will on my next oil change...
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post #8 of 19 (permalink) Old 05-18-2019, 09:00 PM
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Originally Posted by tusabes View Post
The best engine flush is good old dexron ATF transmission fluid
Pour a quart in and idle the car for 20 minutes then drain and refill with correct oil
Do I drain a quart of oil out?
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post #9 of 19 (permalink) Old 05-19-2019, 01:30 AM
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Quote:
Originally Posted by doni01 View Post
You mean the lower pan?? This it??

Yep

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Originally Posted by nrphlly View Post
Do I drain a quart of oil out?
Not worth bothering as you are only idling it for 20 mins.

Do get it hot by running it round the block first BEFORE PUTTING THE FLUSHING OIL IN

HTH,
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post #10 of 19 (permalink) Old 05-19-2019, 07:43 AM Thread Starter
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Thanks, everyone. I've also discovered that M113's can start this "click" if they're not driven for a while. Dad's car didn't get driven during the winter to keep the road salt away, and it's doing this ticking now (it hadn't been before the winter). Didn't know what the "small sump pan" was until this morning (lower oil pan), so thanks for the pics and confirmation. Going to do this procedure to Dad's car when I get a moment.
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2000 S430 (Dad's car, used for special occasions)
2000 S500 (best friend's--now WIFE's--DD: my first W220 project car, once gone to, and now returned from, an excellent home--welcome back home, baby!)
2003 S430 (one of two current DD's--second W220 project car)
2003 S600 (third w220 project car, "sex on wheels")
2005 E320 CDI (the other current DD--first W211 project car)
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