Oil Leaks Fix From The Vacuum Pump, Cam Plugs, And PCV Valve On A 2007-2014 Mercedes C300

[@tas4092]

I did it! This was one of my toughest auto repair jobs ever. Why would they design it this way? Anyone thinking of trying this, make sure you don’t have large hands and have the proper tools! A magnet is a definite must because you will need to use that to position the e10 socket and reach in with the other hand to guide it onto the screw. Then reach in and connect a small ratchet to the socket with barely enough room to break loose the bolts. Then you remove the ratchet and use the socket to finish unscrewing. The same when you put the screw back on. A small 8mm wrench is handy as well for the 3rd bolt which is closest to the driver side. You’ll be doing a lot of this by feel. Putting the vacuum back on requires a lot patience and wiggling to get it in right. Overall I’m happy because I was able to get the part from a very low mileage car and replaced on my leaky 160k mileage car. Total cost $65 for the part and scratches/bruises on my hands and arms, 2.5-3 hours of my time. Total savings, over $500 if I brought it into the dealer.

[@omars.3021]

Great video, thanks for the info... I have a tip regarding E10 bolts... If an E10 socket is not available or if space is tight and it is difficult to get a ratchet onto any E10 bolt, you can use an 8mm (or 5/16") wrench to get it out. You have to be extremely careful to keep the wrench pushed onto the bolt itself as you loosen it so as not to strip the teeth, so use one hand to push onto the bolt and one hand to loosen it. Not the most ideal method but for those instances when it seems the manufacturer designed a part in a way that makes it mpossible to remove, we have to get creative.

[@sethsquire2686]

this guy is one of the best . thanks brian

[@timb7775]

Informative video. I have a 2010 C300 4matic Sport with M272. Just reached 150,000 so going through everything and noticed oily residue at these areas in the video. I planned on replacing the drip pan under the breather cover also while im at it. I checked and all the bolts require an E10 socket. I wasnt even aware that was a vacuum pump on the drivers side, didnt know what it was. I dont have an actual E10 torx wrench, just sockets. Hoping either an 8mm or 5/15 closed end wrench I have will work at cracking the bolts loose. This car is failry easy to work on but I find myself always having to buy new tools to get the job done.

[@gee7836]

Great Job, you were a big help in rep[lacing the the pump and fixing pesky oil leaks.

[@ShaneIsAlways]

Another fantastic video from you! These are the best videos I’ve seen!

[@HowtoAutomotive]

Thank you!

[@colinaglae2605]

Another brilliant video thru the process of replacing the brake booster vacuum pump!! Thanx Brian !!

[@lado2041]

What saved me time is removing rubber hose behind MAF give me more space on left side what helped me remove bottom screw with both hands using 5/16 long socket!! After that was easy! Return is simple! Worst part is squize pump back align is easy just use mirror to see where that notch goes!

[@aclayg]

Thanks! I will have my dealer check this out. The smell of burning oil is making me apprehensive to drive over long distances. I heard that this gasket and then an expansion plug, and cam-bore expansion plugs ( fairly economical) 🔌 could be the reason that I smelling burn oil. Thank you kindly, Dr G!

[@everetteramey5723]

Best video I seen.. that vacuum hose I forgot how to put it back in..

[@Supertonez88]

Clear and simple explanation. Thanks Brian!

[@HowtoAutomotive]

Tony Nguyen thank you and thank you for watching!!

[@willmill409]

Great video but you over looked one thing as did i the first time i did this job. The first part you replaced with the hose connected was full of oil because the crankcase oil seperator aka oil drip pan inside the crank case has a diaphragm that ruptures alowing oil to be sucked up that hose and into throttle body then into intake manifold. If yoy dont replace this your intake will keep sucking up oil until the flaps inside intake manifold will be destroyed and those are not cheap. The oil drip.pan aka crankcase oil seperator is only like 30 bucks and easy to replace. Change it before you have to spend $600+ on intake manifold

[@idrisabubakar7982]

I had similar problem and i re-rout the brake vacuum hose to a different point on the throttle body. Brake works now but i want to know if their are any negatives with getting vacuum to the brake directly and blocking of the vacuum pump

[@nikitacht4895]

Very good guide, thanks a lot. I have a rookie question : do you need to purge the oil before doing these replacements?

[@HowtoAutomotive]

Nikita Cht There’s no need to do anything with the oil less it’s due for service or dirty.

[@Dnasty1]

Great video as usual is this the same pump that goes on the m273 engine but on the passenger side?

[@c.brooke5490]

This is not an easy DIY for the occasional DIY'er. May I suggest you remove the mass air flow meter for access to one bolt. Then remove the O2 sensor and get the bottom bolt from below. Almost impossible to get out (let alone back in) from above. Don't attempt it without having a 1/4" flex head ratchet and the correct 1/4" E10 socket. Harder than replacing the power steering pump on a M119....and that is saying something.

[@StevenFernandez-s5v]

Helps Desperately Needed….I Changed My Cam Plug On My C300…Once The Engine Builds Temperature The Pressure Pushes The Cam Plug Out Causing A Leak.What Should I Do?…Do They Make A Sealant Or Something I Can Put On It To Stop The Leak?

[@long75551]

Thanks, Brian. Where is it on 2016 GLA250?

[@TangDynasty1983]

Thanks for the video. At what millage does fhe PCV valve needs to be replaced ? Thx.

[@hallhouse5098]

Apache Cai Just replace it. The rubber seal is usually blown out at 30,000 miles or sooner.

[@detroitone3118]

good video. attacking this job this morning

[@HowtoAutomotive]

detroitone thank you!

[@shawntudor9298]

Thanks bro very detailed 💯

[@HowtoAutomotive]

Thank you!

[@MrThashiznit]

When should you replace this pump ? Any fault code ? Noises ? Other symptoms ? Thanks

[@tonywhipple]

Hard brake pedal or they leak oil

[@hallhouse5098]

8mm (millimeter) ratcheting wrench works just fine ,but you’ll notice there are a lot of breaks in the video for off camera finagling of the bolts. One way I got the top right bolt in was to use a 8mm 1/4” drive socket and a ratcheting thumb wheel ratchet that has a knurled perimeter for gripping. Also the lower bolt is a real mofo and actually can be accessed from underneath to spin with a socket by reaching up past the exhaust. I used a 8mm socket on the top bolts with a flex head 1/4” ratchet to tighten. Some cars have a little different design such as the 204 I worked on and the booster tube would not swivel out of the way and the cowl drain needed to be moved to the side as well as unplugging the mass airflow sensor connector to gain better access. I was tempted to remove the mass airflow sensor entirely to gain better access which I will do in the next one I run into. Note: the new part will not snap into place if your keyway on the pump is not aligned with the slot on the camshaft. If it snaps into place you’re in good shape.

[@rattown99]

I have seen two videos on doing this job and with the edits it looks pretty simple, it’s not! To break the right bolt I used the socket held with vice grips, worked great. The bottom bolt is a real pain to get back in. Removing the throttle body is a good idea.

[@chrisc1510]

hi vacuum line connector (at 4:56) does have any rubber rings inside? my ML350-2014 vacuum line connector is wobbly and loose, moves about 1/4" back and forth and when pulled slightly you can hear vacuum leak. under vacuum it gets sucked to nozzle and do not notice any leak, but I think something is not right in this connection. May be previous mechanic forget to put the oring back after vacuum pump replacement?

[@kingtony4507]

My cam plugs keep coming off a bit after a drive i make sure they're flush and in all the way in but still they seem to come off, any suggestions?

[@---vm4yj]

Any videos on how to fix a p0341 code on a 2007 w211?

[@DavidDavid-zo3yc]

Hello , i replaced mine but brake pedal is rock hard before it was soft . Do you have any idea ?

[@johnnyhernandez4849]

Have a 2010 mercedes Benz c300 4matic What are the part numbers to the pcv valve and the cam plugs...somewhere it's leaking oil cause I can smell it bad inside the car.. please help

[@rosepatton592]

thank you

[@cesarbojorquez7418]

Great video. Thanks.

[@HowtoAutomotive]

Thank you!

[@byronkellywfg]

Priceless - I look forward to saving about $4k in labor (literally).

[@ssdiagnosticsandautomotive1864]

What's the labor time on the vacuum pump R&R

[@cesarseizure8123]

Thanks man

[@gramenshoshi1993]

I have a 2014 ML 350 BlueTec, the vacuum brake pump it’s leaking from the gasket that Is not connected to the engine but the other one, where can I buy that?

[@ottoramesco8422]

Can u tall me where at located the vacuum pompa at mercedes benz Glk 2010 please

[@jgeorges3061]

good info as always thanks Brian, for sharing. cheeeers

[@HowtoAutomotive]

j georges thank you for watching!

[@ahmadaburezeq4678]

Brother same car i have a vacuum sound coming from brake booster inside the dash (the soud gone once i presse the brake pedal ) how can i make sure that is break booster failure or the vacuum pump or this sound related to the bad break pads

[@HowtoAutomotive]

The pump would not make noise. The problem is going to be in the booster.

[@mauramurillo8010]

Any symptoms of a warn out vaccum pump

[@rogernemos795]

Excellent!

[@HowtoAutomotive]

Thank you!

[@upkarbath]

was vacuum pump leaking oil?

[@joshgraf5981]

how do you know if your vacuum pump is bad?

[@ChrisBrown-wk9id]

Can I just purchase and replace the gasket and o ring for the vacuum pump?

[@HowtoAutomotive]

Chris Brown On Volvo cars they have a similar pump I know you can do that but I’m not sure on the Mercedes

[@mightymoe4635]

How much does it cost to have the vacuum booster replaced?

[@obaidaziz5419]

Good job thank u

[@tylerj2655]

My pump is full of oil is that right to have oil in the pump casing

[@HowtoAutomotive]

If you mean the oil coming out of the hose that you take off of it then no that’s not normal.

[@bigcharris6712]

Is there anyone who can help me I have a oil leak on mercedes w204 2009 c220 and its coming from the right side show me the location of where abouts the camshaft plug location

[@b.trill6868]

Can pcv valve cause cel to pop on with system ti lean and to rich? Bank 1 bank 2 as well as misfires ?? I replaced maf sensor w/ filters… fuel injectors. & ocygen sensors with spark plugs as well. WhT could it be im thinking vaccum leak

[@ggbbb1280]

Did you find the problem?

[@b.trill6868]

@@ggbbb1280 yea I had a hole in my intake manifold

[@ggbbb1280]

Thank you. Can I ask if it was the tube coming out of intake in front end?

[@b.trill6868]

@@ggbbb1280I believe there was like plastic rods that move inside the intake manifold. It was like near the corner of the intake where the gaskets would lay. If that makes any sense. Spent about 1100 on parts that did not need to be fixed. Smh

[@Aardvark49]

How often do you see pump failure versus just the o-ring on the pump?

[@HowtoAutomotive]

As far as them completely failing to the Point that they don’t work I’ve only seen it one time. Most the time it’s just leaking oil and I see that around 60,000 miles. So quite often.

[@Aardvark49]

@@HowtoAutomotive This car has 106,000 miles on it. Car is running fine, so I'm thinking seal replacement will take care of the leak there. Biggest leak is from the oil separator cover on Bank 1 that drips onto the cat. I'll be replacing that too, along with the expansion plugs. Thanks again for the tips.

[@HowtoAutomotive]

Vic Sorlie overall those are all pretty easy repairs you’ll have this back in good shape in no time.

[@jacquelinedelgado3847]

How much oil can a vacuum pump leak

[@ManJunk427]

great thank you soo much

[@victorlee5781]

super

[@amg5325]

Please help me My car s550 s class 2009 i have check engine light with code p0497 how i can fix it ?

[@mikedizzle5273]

I have an 08 c300 and my vacuume pump failed. I purchased an aftermarket one,looked the same accept the aftermarket had to small metal ears that stick out that line up with the back of the cam. Worked great for about 20 minutes then once again my brakes get super hard. Took it off and to my horror the little metal ears sheared off. Don't buy aftermarket crap buy mercedes original parts,it may save your life.

[@ottoramesco8422]

And how ca a chanche

[@tylerj2655]

05 1.8 kompesser

[@kenxiong6830]

The Big German Three are notorious for engineering difficult to get to parts smh

[@ManJunk427]

funny how you didnt show how to get the 4 bolts off the pcv valve.....CAUSE IT WAS A BITCH LOL

[@HowtoAutomotive]

manjunk427 This is one of my earlier videos. I’m adding a lot more detail to now.

[@ManJunk427]

cool.......those 4 bolts were still...a pita . thanks for the vid though ,.,,much appreciated

[@MrRangerZr1]

No wonder these things are unreliable, no hose clamps on hoses?

[@omars.3021]

Hose clamps aren't needed and in this case, lack thereof was not the problem. The oil leak on the oil separator happens because the gasket/o-ring fails due to heat. The hose, on the other hand, and even without a clamp, is pretty tight around the flared pipe it goes on. (In fact, Brian, and after reinstalling the oil separator, should have pushed the hose it in further over the pipe to the point where it goes over the notch that is n the pie itself!

[@Kretenn]

This is wrong, I have 2013 C300 and my engine is different(no metal in top center).. your years are mixed up sadly