Seafoam on m271 engine
Thread Starter
Senior Member
Joined: Nov 2008
Posts: 461
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From: Orange County, CA
C230 K Coupe (05)
Seafoam on m271 engine
Sup guys,
I was planning on seafoaming my car and so I was searching the forums for where the manifold vacuum line is on a m271 engine. I have not found the answer yet so I would appreciate ur guys' guidance on this. If you guys have a picture of it, that would be perfect!
But before that, wanted to find out what you guys even thinking about seafoaming the car. I was reading through the forum and one guy said that he would not use seafoam what so ever (seemed pretty adamant about it). So now i am doubitng myself whether i should be using the product or not. Everywhere else on the net however, the product has gotten good reveiws... what's ur guys' thoughts?
aprreciate your help!
I was planning on seafoaming my car and so I was searching the forums for where the manifold vacuum line is on a m271 engine. I have not found the answer yet so I would appreciate ur guys' guidance on this. If you guys have a picture of it, that would be perfect!
But before that, wanted to find out what you guys even thinking about seafoaming the car. I was reading through the forum and one guy said that he would not use seafoam what so ever (seemed pretty adamant about it). So now i am doubitng myself whether i should be using the product or not. Everywhere else on the net however, the product has gotten good reveiws... what's ur guys' thoughts?
aprreciate your help!
MBWorld Fanatic!
Joined: Dec 2007
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From: Corona, CA
03 g35 coupe...........02 c32 Sold
its more popular on the honda forums, from what i hear its a hit or miss. Some people swear by, others have used it and actually lost power because the carbon build was actually keeping the compression on older engines with deteriorated engine seals.
I think its one of those things where the potential risk outweighs the benefits. i would just use fuel injector cleaner like techron or something instead.
I think its one of those things where the potential risk outweighs the benefits. i would just use fuel injector cleaner like techron or something instead.
Thread Starter
Senior Member
Joined: Nov 2008
Posts: 461
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From: Orange County, CA
C230 K Coupe (05)
yeah, i just put the seafoam through the gas tank...like a fuel injector.
its a PITA to remove the airbox to get the vacuum line. Next time ima just get the fuel injectors.
its a PITA to remove the airbox to get the vacuum line. Next time ima just get the fuel injectors.
Thread Starter
Senior Member
Joined: Nov 2008
Posts: 461
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From: Orange County, CA
C230 K Coupe (05)
Super Member
Joined: Dec 2008
Posts: 526
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From: MD
2007 C230 and 1985 Monte SS
I put techron concentrate through the gas tank (2 bottles in 2 consecutive tanks about 2 months after I bought the car) and I noticed a good 1.5-2 mpg increase on the dash display for the same commute.
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When I had a '98 Isuzu Rodeo, (as recommended but many guys on some forums) to use SeaFoam in combination with Chevron Techron cleaner and it worked wonders on a notoriously carbon deposit laying engine. However, that SeaFoam is some strong stuff and I'd agree that you'd be better off sticking with just the Techron and using it periodically. You don't want to risk damaging your seals, etc. I view SeaFoam and most cleaners more of a cheap fix / restorer than a preventative measure.
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Member
Joined: Jan 2009
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From: Northern CA
CLK55 AMG, SL55 AMG, C55 AMG
I agree with the above posts, to stick with Techron or BG44k (very good stuff). Based on past experience of using it as an experiment, Seafoam is very abrasive and can really eat away at the valve seals and other critical parts in some circumstances. Not sure I would try something this agressive on my MB motor.
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Junior Member
Joined: May 2007
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C
SEAFOAM or BG44K
I have 30k on my 2003 c230 and just incountered carbon deposits left on my exhaust valves. my compression was 150, 120, 145, 150. I am finaly realalizing that this engine has lots of problems. I just put Seafoam in my car a couple of days ago, and it helped. I am now convinced to use this or BG44k at every oil change or at least 2to 3times a year, until have to fix head. TKS to Buellwinkle about learning about problems with m271 engine cylinder head problems and poor design that causes exhaust LEAKS. I highly recommend to use!!!!
MBWorld Fanatic!
Joined: Dec 2007
Posts: 5,034
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From: Corona, CA
03 g35 coupe...........02 c32 Sold
whats it suppose to be? i know on hondas its suppose to be 170. That 120 is really bad...there shouldn't be more then a difference of 10 between the cyclinders.
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From: Huntington Beach, Ca.
'17 Jaguar XF
Junior Member
Joined: May 2007
Posts: 55
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C
2nd Compression Test after seafoam and BG44k
YEhaaaaaa!!!! My compression is now #1 , 155 , #2 150, #3 155, #150.. My best guess on what it should be around 150 +/- 10. I am now a FIRM beliver that these products work and will help our bad design M271 engines. I used seafoam for one week, then used BG44k the next week. Seafoam is about $ 9.00 , BG44K is around $20-30 dollars, alot more stronger which I think worked better.
I highly recommend anyone with this M271 engine 2003-2007 c230 to use a can in gas tank at every oil change if possible or every 2 oil changes , around every
10k miles..
Cheers and every1 gl
I highly recommend anyone with this M271 engine 2003-2007 c230 to use a can in gas tank at every oil change if possible or every 2 oil changes , around every
10k miles..
Cheers and every1 gl
Member
Joined: Jan 2009
Posts: 226
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From: Northern CA
CLK55 AMG, SL55 AMG, C55 AMG
Yes it works great. I use one can of 44k every 6,500 miles (I split my oil service intervals and change twice between major services) and it works great. Cylinder pressure is always 150+ and no leak problems. This stuff really works for the M271 motor 
Glad you like it as much as I do. $ well spent!
Glad you like it as much as I do. $ well spent!
MBWorld Fanatic!
Joined: Nov 2001
Posts: 5,851
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From: Huntington Beach, Ca.
'17 Jaguar XF
Great! Nothing like a test result to confirm a fix. This may be one of the things that save the m271! It would be nice if anyone had a before and after compression results for just Sea Foam or just BG44K. If you're having reduced power and rough running with the m271 and the vacuum lines are OK it would be wise to get a compression check and proceed with trying to correct it with one of these products. I've never been a fan of 'liquid tune ups' but you can't disagree with measured results. It will be interesting if more people get the same results.
Newbie
Joined: Apr 2009
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From: New Jersey
'04 ML 500 to tow the I-Pod camper, '06 Rubicon lifted, locked and loaded, '58 Farmall Cub
Just ordered some BG 44K from the place below,
http://www.mopar2u.com/?gclid=CMj72K...FQQRswodfX7i9Q
$16 a can.
Thanks for the heads up!
http://www.mopar2u.com/?gclid=CMj72K...FQQRswodfX7i9Q
$16 a can.
Thanks for the heads up!
Thread Starter
Senior Member
Joined: Nov 2008
Posts: 461
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From: Orange County, CA
C230 K Coupe (05)
thanks for the link!
Just ordered some BG 44K from the place below,
http://www.mopar2u.com/?gclid=CMj72K...FQQRswodfX7i9Q
$16 a can.
Thanks for the heads up!
http://www.mopar2u.com/?gclid=CMj72K...FQQRswodfX7i9Q
$16 a can.
Thanks for the heads up!
Member
Joined: Jan 2009
Posts: 226
Likes: 6
From: Northern CA
CLK55 AMG, SL55 AMG, C55 AMG
If you can get it for $16 a can on the link provided above, go for it. Good price, as most cans of BG 44K range from $18-24+ a piece.
Might also check on ebay motors. Once in a while some of their vendors have good package deals on multiple cans and some offer free shipping as well.
Got a four pack last winter for less than $17 a can and free shipping plus they threw in a can of C5 and MOA, other great BG products as freebies. Good deal
Might also check on ebay motors. Once in a while some of their vendors have good package deals on multiple cans and some offer free shipping as well.
Got a four pack last winter for less than $17 a can and free shipping plus they threw in a can of C5 and MOA, other great BG products as freebies. Good deal
Member
Joined: Apr 2006
Posts: 167
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what are your guys' opinions of damage to the seals,etc over the long term?
seems to me, if you don't have issues with compression (or compression is restored after its use) its not worth the risk to use it (or continue to use it).
seems to me, if you don't have issues with compression (or compression is restored after its use) its not worth the risk to use it (or continue to use it).
Newbie
Joined: Jan 2007
Posts: 9
Likes: 0
YEhaaaaaa!!!! My compression is now #1 , 155 , #2 150, #3 155, #150.. My best guess on what it should be around 150 +/- 10. I am now a FIRM beliver that these products work and will help our bad design M271 engines. I used seafoam for one week, then used BG44k the next week. Seafoam is about $ 9.00 , BG44K is around $20-30 dollars, alot more stronger which I think worked better.
I highly recommend anyone with this M271 engine 2003-2007 c230 to use a can in gas tank at every oil change if possible or every 2 oil changes , around every
10k miles..
Cheers and every1 gl
I highly recommend anyone with this M271 engine 2003-2007 c230 to use a can in gas tank at every oil change if possible or every 2 oil changes , around every
10k miles..
Cheers and every1 gl
can you list the steps of how you used the seafoam? was it 1/3 in the combustion chamber, 1/3 added to the oil, and 1/3 added to the fuel tank? details, please! the compression on ours is pretty much the same as yours before except the low cylinder is #4...
Junior Member
Joined: May 2016
Posts: 31
Likes: 0
2000 CLK 320
I have 30k on my 2003 c230 and just incountered carbon deposits left on my exhaust valves. my compression was 150, 120, 145, 150. I am finaly realalizing that this engine has lots of problems. I just put Seafoam in my car a couple of days ago, and it helped. I am now convinced to use this or BG44k at every oil change or at least 2to 3times a year, until have to fix head. TKS to Buellwinkle about learning about problems with m271 engine cylinder head problems and poor design that causes exhaust LEAKS. I highly recommend to use!!!!
BE CAREFUL HANDLING THE AIR MASS SENSOR THE THING THAT GET PLUGGED IN AFTER THE AIRBOX ON THE LEFT SIDE OF THE V-6 CLK320. I WOULD GO FOR ABOUT AN HOUR TRIP GET UP TO A HIGH OPERATING TEMP. AND BUY A SPRAY BOTTLE AT THE DOLLAR STORE.. FILL IT WITH WARM WATER, MAKE SURE IT COMES OUT LIKE A SORT OF MIST. THEN TAKE OFF THE MAF( MASS AIR FLOW SENSOR ) AND HAVE SOMEONE REV YOUR CAR AFTER THE TRIP AND ITS OVER 85 DEGREE OPERATING TEMP//.
REV TO 2-3 RMP FOR 8-10 SECONDS WHILE SPRAYING A LIGHT MIST INTO THE AIR DUCT PIPE.
THEN LET OFF AND QUIT SPRAYING.. AND RESUME FOR ANOTHER 8- 10 SECONDS... CONTINUE TO SPRAY A FEW TIMES, AND THIS WITH STEAM CLEAN YOUR COMBUSTION CHAMBER CYLINDERS.
I REPEAT CAREFUL WITH THE MAF SENSOR I BROKE MINE BY JUST PRESSING IT TO GO BACK IN ITS PLACE
.... HAD TO GET A USED ONE AT BONEYARD FOR $70 NOT COOL.... WHAT WAS SUPPOSED TO BE A FREE DIY THAT CLEARS CARBON COST ME BIG BUCKS..... ITS STILL WORTH IT TO ME... I HAD A MIS FIRE ON CYLINDER 5... NOT SURE IF IT WORKED ALL THE WAY IM THINKING I MIGHT NEED A NEW COIL PACK.
I STRIPPED THE TORX BIT SO I COULDNT SWITCH THEM AROUND TO SEE... I HAVE BG44K ON THE WAY SO IM GOING TO GET MY ENGINE SUPER HOT AND ADD IT AS WELL...
MBWorld Fanatic!
Joined: Aug 2015
Posts: 1,059
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From: DC Metro Area
2007 Mercedes E550
Seafoam love
Just take out brake booster plug. SLOWLY pour in about 1/3 to 1/2 seafoam in the line, the vacuum will suck it right up. If your car dies or misfires it's just because you put in the seafoam too quickly. Let sit for at least an hour. Start up and you will see huge cloud of smoke. This is normal. Avoid residential areas because people will complain. Drive it like you stole it, being aware that traffic behind you will be smoke screened. You may get check engine light and engine stumbling. When I do seafoam I almost always change plugs, since the get corroded with the seafoam treatment. Good luck and enjoy the extra power!!
