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Super Moderator CA 2012 SLK55 AMG w/P30
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Discussion Starter #1
Please excuse any wrong terminology as I'm not a mechanic :wink:

On initial startup, sounds like there's marbles rattling around in there (don't remember where the indy said he thought he heard it). Lasts for 4-5 seconds and disappears.

Cause: maybe oil drained out and not getting in there till it's "filled up" with oil while the engine running. Maybe it's damaged lifters (who knows why). This happens when the engine is cold or warm.

Not fuel related (as i get 40MPG).

What I think is the reason. Either:

1)I did buy her used and quite possibly infrequent oil changes caused build up that caused the lifters to stick at start up. Until the oil gets in there, they "rattle" for that 4-5 seconds.

or

2)with the cyl displacement I have, with 4 of 8 cyl shutting down in C mode at highway speeds, it just gets gummed up from "lack of firing". I doubt it's 4 "different" cyl shutting down, it's the same 4 every time.

Solutions (well, not solutions but opinions) that I have found (on this site and elsewhere):

There are lots of oil additives out there (and not so much additives as "I've done this and it works fantastic"). Other than commercial "lifter cleaners" (so many of them and they all have equal "positive" and "negative" opinions), some have suggested adding a quart of ATF (or even totally refilling the crankcase with ATF ) , run it for X miles and do a complete oil/f change.

Theory here is it has more "cleaners" than regular oil. NOT doing this.

One other idea I came across (and I'm going out to try this shortly) is to run her at about 3000 RPM for an hour or so.

I would try this on the highway by only running in S (so the 4 cyl don't shut down) and then downshifting till the RPM's hit that 3000 figure.

Comments are most welcome (neg comments are also welcome).
 

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Administrator 2009 SLK 55 AMG/Founding Member 2006
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Super Moderator CA 2012 SLK55 AMG w/P30
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Discussion Starter #3

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Administrator 2009 SLK 55 AMG/Founding Member 2006
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96,571 Posts
a bottle is about $8 tops
someone sells it in Canada
 

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Administrator 2009 SLK 55 AMG/Founding Member 2006
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96,571 Posts

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Administrator 2009 SLK 55 AMG/Founding Member 2006
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96,571 Posts
stuff you want is GM Fuel System Treatment Plus and it is manufactured by Chevron, and is available at the local dealership.
 

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Administrator 2009 SLK 55 AMG/Founding Member 2006
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Super Moderator CA 2012 SLK55 AMG w/P30
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Discussion Starter #8

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Super Moderator CA 2012 SLK55 AMG w/P30
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13,274 Posts
Discussion Starter #9
stuff you want is GM Fuel System Treatment Plus and it is manufactured by Chevron, and is available at the local dealership.
I'll look into this but I'm puzzled; how does a fuel treatment affect someplace only oil goes to?
 

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Super Moderator CA 2012 SLK55 AMG w/P30
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Discussion Starter #10

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Administrator 2009 SLK 55 AMG/Founding Member 2006
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As Techron flows through your engine, it scrubs vital engine parts and minimizes harmful deposits in the combustion chamber.
 

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Administrator 2009 SLK 55 AMG/Founding Member 2006
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Any Petro-Canada shop.
Goes by the name of Tactrol here.

Redline SI-1 Complete Fuel System Cleaner

Chevron techron substitute for Canadians
I used to buy Chevron techron when I used to live in Vancouver but there are no chevron stations anywhere else in Canada. For those who are looking for a substitute you can buy canadian tires motomaster formula one fuel system cleaner, it s the same as techron and contains PEA as well, or try gumout regane

bought a bottle last summer at the local GM dealer....
 

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Registered 2009 SLK200
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As Techron flows through your engine, it scrubs vital engine parts and minimizes harmful deposits in the combustion chamber.
But its his hydraulic tappets noise etc that are making the noise which would be oil related etc
( Oil starvation or lack of oil changes etc )

Nothing that fuel treatment would help out of his dillema .

First thing for him to try out is an engine oil change using 0W -40 Mobil 1 oil or another major brand see if it helps out or engine oil flush additive ?
 

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Super Moderator CA 2012 SLK55 AMG w/P30
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Discussion Starter #14
PHP:
But its his hydraulic tappets noise etc that are making the noise which would be oil related etc
( Oil starvation or lack of oil changes etc)

Nothing that fuel treatment would help out of his dillema .
Wondered how a fuel additive will help in the oil dept.

First thing for him to try out is an engine oil change using 0W -40 Mobil 1 oil or another major brand see if it helps out or engine oil flush additive ?
Did the oil change/f month ago. That's when the indy (and then me) noticed it. Being in the car top up when starting I didn't hear it. No additive used.

BTW, did the hour run at ~2800 RPM. We'll see when she's cold.
 

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Administrator 2009 SLK 55 AMG/Founding Member 2006
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so nothing to lose :D Try some!
 

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Premium Member 2004 SLK350
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Same thing about Techron ... when you will stop with this Jef?
You put the Techron in the fuel and at the best it might clean you piston head but how on earth will help with the hydraulic lifter/tappets? If you have fuel in your oil that is contamination and that is bad for the liner wall and all components as the oil is washed and is not lubricating as normal.

I will change the oil filter with new gaskets the rubber one. If you use 0w40 i will try a 5w40 oil this is cheap comparing with removing the cover to inspect the lifters.
 

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Administrator 2009 SLK 55 AMG/Founding Member 2006
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never will I stop...never you hear! :D
 

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Super Moderator CA 2012 SLK55 AMG w/P30
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Discussion Starter #19
I will change the oil filter with new gaskets the rubber one. If you use 0w40 i will try a 5w40 oil this is cheap comparing with removing the cover to inspect the lifters.
Only using 0/40. By going to a heavier oil (5/40), would that limit the amount of oil that drains out between starts, thereby reducing (maybe eliminate) the amt of rattle and in the end, reduce wear?
 
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