HomeТранспортRelated VideosMore From: 50sKid

How to Do a Cylinder Leak Down Test on an E46 BMW

486 ratings | 28153 views
OTC Leak Down Tester: https://www.amazon.com/OTC-5609-Cylinder-Leakage-Tester/dp/B0030EVL60 This video is for entertainment purposes only. 50sKid assumes no liability for any repairs or modifications performed by the viewer as a result of the information contained in this video.
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Text Comments (99)
Ahmed Moustafa (8 days ago)
very informative video. Many thanks !
Jamaal Montgomery (2 months ago)
Hey great video I have a fuel cut out on cylinder #6 have replaced disa valve cause of leaking oring have did the ccv and all the lines did all vacuum lines intake gasket valve cover gasket coil and spark plugs MAF sensor what could be my problem head gasket the code is a P01353
DANGERUS (4 months ago)
test compresión engine hot o cold please?
neb 100176 (4 months ago)
Is it worth including the engine block test for any leak as well? Any leakage during the piston TDC should be the same when the piston down. Any difference is considered as engine block leak.
carlos GP (5 months ago)
gracias, haga subtitulos por fabor, que son faciiles de traducir
tayfun kilic (5 months ago)
you said cencel fuel if l have take off fuel pumb fuse it is work
ThriftyTech (5 months ago)
I know this video is a couple years old now, but just a little advice for those watching. Do yourself a favor and add a ball valve to the intake side of your leakdown tester. It will save some wear and tear on your wrists. You'll want to open it slowly so you don't force the engine to rotate by over zealously pressurizing the combustion chamber you're testing, but it's much easier than spinning the pressure control knob five or six turns twice per cylinder.
Christian Andolini (6 months ago)
I thougt means your piston rings bad ?
M.I. A. (8 months ago)
What if my car is not running for me to be able to warm up the engine can I still perform this test
M.I. A. (7 months ago)
Its strange because its the #4 cylinder and air comes out of 5 but 5 holds pressure and has good comp. I'm still wonderjng if itd still the head gasket on the inner side of the cylinder bores?
M.I. A. (7 months ago)
Adjacent spark plug hole. Thought it was a gasket at first until I took valve cover off and pushed on intake lifter and it was really soft. Its an m54b30 in an e39 2001 530i
50sKid (7 months ago)
A bent or burned valve is always a possibility but where was the air leaking out of when you did the leak down? Exhaust pipe? Intake tube? Radiator? Oil cap? Adjacent spark plug hole? You have to open up everything when you do a leak down and listen.
M.I. A. (7 months ago)
I may have an open valve on 4 its still reads 0 on compression test and holds no pressure in leak down, head gasket is fine. I don't see any oil mixed with water. Took valve cover off and pushed on on intake lifted and its really soft. Could it be that or weak spring or bent valve? I don't want to take head off unless I have to
50sKid (7 months ago)
Yes it'll still tell you where the air is leaking out.
CTW Motorsport (8 months ago)
Dont you want to do this with the firing order?
50sKid (8 months ago)
you can but you don't have to. Just makes it easier to find top dead center.
Phillip Atkinson (9 months ago)
I have alot of experience so I understand everything your saying please respond as soon as u can thanks have a great night
Phillip Atkinson (9 months ago)
Can u email me I have a question [email protected] my crank shaft is moving about 15° before the cams move is this a interfering motor this is my first 325i
artyom17 (1 year ago)
Great video, thanks a lot! Bet it was mentioned already: need to remove the rad cap as well to listen for air bubbles here.
Lanre Oladejo (1 year ago)
Very detailed. How about for the M52tuB28, same issues apply?
Niles Ingalls (1 year ago)
how much of a problem is this test on a cold engine? The car I need to check will not stay running for more than a few seconds.
50sKid (1 year ago)
You can do it cold--the numbers just increase a little bit but who cares--with a leakdown test you're trying to hear where the air is escaping from.
Dee (1 year ago)
50s kid, can leak down test be done on an engine stand? also i remember seeing an updated video for this but cannot find it in your channel anymore?
Dee (1 year ago)
Thank you.
50sKid (1 year ago)
+Dee yes it can. The method in that updated video was unnecessary and just ended up being confusing and I didn't want it out there. Do it the way you see in this video. The numbers you get are correct
Jayee (1 year ago)
FYI. As a general safety tip, DO NOT leave your socket wrench or breaker bar on the crank pulley while you're testing the cylinders. You do not want the wrench flying into your head or slamming it into parts of the car.
Jose Bracero (1 year ago)
Awesome video, keep up the great video's
Brendan OConnell (1 year ago)
great video - thanks!
Art First (1 year ago)
very helpful and informative information, I actually learned something from the white board and the leak down test ! thanks again! keep em coming (valve stem seals) =p would be nice
50sKid (1 year ago)
I have a valve stem seal video. Just search on my channel page to find it.
Johnny D Legend (1 year ago)
Fucking A... one of the most useful tests you can do. I'll be ordering a Leak Down Tester for sure.
Jack Burton (1 year ago)
Very useful vid! Sub'd!!
Traqn Savov (1 year ago)
https://youtu.be/svlwuhK0IIU?list=PLqJG4ZyPIF6OflXtgLWJOFdsiuc-UrZJX&t=106 if you car have a manual transmissions, just spin rear tire in the gear 5 or 6 :) YEP is a lazy way
Thakiid101 (1 year ago)
youre supposed to set your compressed air supply at 100 and regulate the tool to 90 for best results.
Thakiid101 (1 year ago)
yeah that makes sense. accuracy is important to me be because at volvo in order to get approval to fix oil consumption on some cars you need leak down numbers and i dont want to gain or lose approval on a false reading ya know?
50sKid (1 year ago)
Ah sorry man, I will defer to OTCs instructions on that. I think they probably recommend 90psi because that seems to be the standard safe operating pressure for every air tool, however we all turn our pressure up way higher than that.
Thakiid101 (1 year ago)
I was only citing the instructions from otc which i found strange. Not worried so much about easy math as i am about accuracy. otc wants you to regulate the tool at 10 psi less than your tank pressure so if you have 110 coming into the tool then u can set it to 100 and have the easier math, but otc says for best results use the tool at 90 and have your incoming air from the tank at 100. I really enjoy your videos by the way!
50sKid (1 year ago)
No, no you're not. You need 100 psi going in to make the math easiest. You *could* use 90psi and get out the calculator, but you're not *supposed to*.
2000shellback (2 years ago)
Quick question. While turning the wrench to get TDC, you mentioned you went a little too far and had to back up (reversed ratchet). Does going in "reverse" affect or damage the engine. Or is it only supposed to turn in one direction? Thank you very much!
50sKid (2 years ago)
Nah you can go back all you want. The crank bolt won't unscrew because it's torqued down with over 400 Nm.
Brandon Tarver (2 years ago)
hey 50's kid. when I do a leak down test if I put air in cylinder 2 but I hear the air escape out of cylinder 4 what does that mean?
Green Tea (6 months ago)
That video isn't working. Do you have another link? I get zero compression on cylinder 2 and it all comes out of 3, but on 3 I get only 2% leakage through the oil pan.
50sKid (2 years ago)
That your valves might not be closed all the way--check out my corrected video: https://www.youtube.com/watch?v=Uq63-M5vwdk
koohardy (2 years ago)
Awesome video again! Buying an E46 with M54 engine is my dream. I know this car is high maintenance demanding (read expensive). It takes so much time, so much energy. But after watching how easy can you deal with it...man, my dream still lives.Sending regards from Europe / Czech Republic, you're doing great!P.S.: Looking forward to video of engine rebuilding :)
Fiat Lux (1 month ago)
+Team Orca Garage A properly maintained S54 is the best feeling in the world ;)
Team Orca Garage (1 year ago)
A properly maintain M54 is the best feeling in the world.
Joel Cuce (2 years ago)
Lol, yeah, I swapped just a M54B30 into a e36 and now Im a little scared of this things.. But hey, this videos are gold! Another greeting form Czech Republic :D Ale výkonostně to je pecka, di za svým snem, aspoň si už informovanej :D
50sKid (2 years ago)
Thanks! I know, they're very high maintenance.
danekeeper1 (2 years ago)
oil consumption......your cats can't take a lot of that and cats are $$$$$$.
Ip Velocity (2 years ago)
Great videos mate, always very informative. miss the old days with the durable blocks
Ip Velocity (2 years ago)
+50sKid I guess, aluminium blocks do have their advantages but I just think the disadvantages out weigh them, including other petty problems such as wrecking the sump (oil drain) thread and spark plug thread. Anyway your e46 videos are great, just a shame you are having so many problems with it. I know the feeling.. lol
50sKid (2 years ago)
Ah but in the old days you had high tension piston rings that would wear the bores down such that after 150k miles you needed to rebore that block, whereas today you can get away with a re-ring job!
sensei autotec (2 years ago)
when you use the otc leakdown tester,,,and you put pressure ,, do you listen some hissing from the gauges? mine do and i would like to know its normal or is junk
sensei autotec (2 years ago)
lol im really far away.. thx bye
50sKid (2 years ago)
Bummer. I'm sure OTC will warranty the product for you, though.
sensei autotec (2 years ago)
i have the same as you do
50sKid (2 years ago)
I do not hear hissing at the gauges. You have an OTC one and it's leaking or a different brand?
Ari Lin (2 years ago)
This car seems to be very problematic :( I guess you really love the car, or enjoy making these videos (I've subscribed). Have you considered another car by the way, or are you planning on keeping this car and just continue to repair each problem you come across? I don't have the ability to do as much of the repairs as you do, i would have given up long ago.
50sKid (2 years ago)
If I get rid of the car, I won't have a channel. ;-)
PlayerNineteen (2 years ago)
Not bad for an engine with almost 200,000 miles on it :P
50sKid (2 years ago)
it would be a lot better if it hadn't been overheated!
Kenneth Sibert (2 years ago)
Excellent. Very good explanation for a leak down test.
CARS LOVER (2 years ago)
great information thanks
Socheath chhim (2 years ago)
mine burns 1 quart every 5000 miles. m54 on a z4. when the times comes, i would like to see a head gasket repacement video. great video.
Ken (2 years ago)
Awesome detailed information!! Definitely appreciate the technical details in the pressure test and information on the head gasket leaks both between cylinders and cross contamination from cooling fluid into cylinders. I'm looking forward to seeing how you take care of the oil consumption problem. I wouldn't worry too much about the pressure numbers if no symptoms are really present. Either way, I'm looking forward to more informative videos. Excellent work partner!
50sKid (2 years ago)
Ellis Harrison (2 years ago)
Hey man! Great videos. I've been watching for a long time and I have used your videos for all my DIY's so far (VANOS rebuild and oil filter housing gasket are next on my list). When I bought my 320Ci 2 years ago, I was burning 1L of oil every 900ish Miles or so. Now, it's more around 500miles/L. It's getting pretty crazy and I fear for the piston rings. By the way, you have forty-six E46 Repair videos! :) Howdy from the UK. 2004 320Ci 102k miles.
50sKid (2 years ago)
Ellis Harrison (2 years ago)
It's always nice to have some reassurance from a group of people, as opposed to worrying you're the only one having the problem. I've heard the same things to, but as you said, I can say first hand it's not true. Do you mind posting the link to the thread? Cool man, looking forward to the video!
50sKid (2 years ago)
Hey, thanks for the comment. I've actually recently started a thread on e46fanatics where I wanted to hear from everybody as to how much oil they are burning and someone in that thread is adamant that the 320s don't burn oil, so it's nice (for me) to hear proof but of course it sucks for you that you have the same problem that many others, including myself, have. I have a video coming up on how to install a catch can, which many people report helps cure the issue. Pretty crazy that I have that many videos on just this car already, but that was the goal of course!
Nick Torres (2 years ago)
Wow this a great video, sorry to hear about your head gasket. do you think that maybe if you remove the valve cover and re-tighten the head bolts it might fix the compression leak? It's worth a shot if you have to remove the head anyway.
50sKid (2 years ago)
I wish it were that easy! Unfortunately, it's extremely likely that if I try to tighten the bolts at all, they will strip out. It's a known problem with this engine block and other aluminum blocks like it. I will probably have to install steel threaded inserts called timeserts to repair that.
Billy Johnson (2 years ago)
That was informative. Please don't get rid of it or sell it. We're all learning tons of info on these E46's. If you tackled the tranny you can handle the head gasket.:)
50sKid (2 years ago)
Lol, yeah don't worry I'm not getting rid of it. ;-)
repcsi (2 years ago)
So next video, just swap in an S54 . Just kidding :) I feel for you recently I replaced my m54b30 as well, keep coming the e46 videos :)
repcsi (2 years ago)
Thanks, they really are beautiful 0_0
50sKid (2 years ago)
He's only got instagram https://instagram.com/p/ypsskbiX3x/
repcsi (2 years ago)
Wow, can you make a video about those, or does he have a channel ? I would love to build something like that also for my m54 race car project. M54s are also pretty good under moderate boost, you can easily get 300, or above 400 if you are willing to risk more :) .
50sKid (2 years ago)
I've totally thought about that! I have a buddy, who's a tig welder, who makes beautiful custom intakes for blown S54s and he's like "dude, let's make you something fast!" Oh, if I only had the money, lol.
Rashad Sultanov (2 years ago)
Hey Thank you!!!! I have same issue also thinking about rebuilding engine but unfortunnately this will cost about 3k$ at least. good luck you!!!
voltes five (2 years ago)
I have 2001 BMW 330i. I can't wait to see you do video replace cylinder head gasket. coz mine i need to replace it. I'll wait for you bro.
TOPROLLER101 (2 years ago)
it should be between 230 and 260 psi per cylinder I watched a bmw video not to long ago about building a bmw motor so look into it the rings might be bad too the video I watched the guy did the piston rings and the head gasket and timing chains
TOPROLLER101 (2 years ago)
yes I really enjoy your videos and you have inspired me to do work on my bmw but keep up the good work and the detail on teaching others on how to do things the right way and save a ton of money thank you for the great videos
50sKid (2 years ago)
Yeah seems I'm seriously low on compression, but hey, I can only go up from here!
G S (2 years ago)
Nice video man!
The mech a nic (2 years ago)
that really sucks... I watched all your vids on this car. I can't believe it has this many problems. did you buy the knowing about its poor condition? great for making vids but damn...
The mech a nic (2 years ago)
I like your dedication, I'm looking forward to your next videos. keep up the great work.
50sKid (2 years ago)
Yeah I bought this car because I wanted a project car. I knew it had certain issues. I did not know it had THIS particular issue. And I definitely didn't think I would have the transmission issues that I did, but, like you said... makes for good videos. I hope everyone can see that I'm not getting frustrated with all this stuff and driving the car off a cliff with no one in it, but rather dealing with it all in stride. That's how I am.
Real Tech (2 years ago)
I don't like how you didn't try to hold the ratchet at all this thing can spin and break things under a 100 psi
50sKid (2 years ago)
Real Tech (2 years ago)
I understand I'm just saying cause that happen to me before, but nice video tho man really learn slot from you guys on YouTube great work!!
50sKid (2 years ago)
Yeah I hear you, but it didn't happen to me once. Perhaps because air was busy leaking out rather than building up and having no where else to go? But, yes, I should have removed the ratchet, actually, to practice safe test.
Dale Yurk (2 years ago)
Great information. I hope you persist with keeping the car in good condition. I take heart at your willingness to solve these issues in your home garage without lifts, etc. Please keep up the good work! Thanks.
Robert Laugherty (2 years ago)
Duuuuude. Sorry to hear about the health of your motor. However if anyone can make fixing it clear and concise and easy to follow I know you can. Def sounds like an overheating issue on the head. I'd be interested in seeing you pull the pistons with the motor still in the car but will be waiting and watching your progress. Good luck!
50sKid (2 years ago)
Thanks for the support! I'm leaning towards pulling the block specifically because I've learned that you can't remove the oil squirter on cylinder #6 with the crank still in the block because the crank sensor impulse wheel is in the way, so running the hone to deglaze it wouldn't be possible. Oh well. The nice thing about this whole mess is knowing I'll get a faster car at the end of the project.
Steve 060590 (2 years ago)
Also Radiator and Coolant Tanks are very common to get bad even without Overheating. The Radiator gets warped and the Tank gets replaced also, so i wont call that a proof for overheating.
Steve 060590 (2 years ago)
Have you checked the Oil-Dipstick? If you open it up the pressure of the crankcase will release better than by just opening the Oil-fill-Cap, because of the Check Valves in the Head to remain some Oil in there. If the Pressure is still coming out of the other Zylinders, you might have to Change your Head-Gasket. Worped Heads on the M54 are very unlikely if the car hasnt overheated. Greetings from Germany :)
50sKid (2 years ago)
Ah but you're not thinking about the oil drain holes in the head & block for the oil to drain back down to the pan. There are no check valves there. Blow-by has to have an unobstructed way to get up to the valve cover and exit the engine, and that is how. Also, another reason I don't use the oil dipstick tube is because it is submerged within the oil in the pan and depending on that level, the relief hole in the side of the tube may or may not be submerged as well, causing the air to have to bubble down through the oil to travel into the tube. Greetings from California!
Cheng Yang (2 years ago)
my 330 i had the same problem sold it bye bye bring money with Bmw.haha lol.

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