BMW 335I E90 N54 Leak Down Test: FINALLY!

[@ram00sa00]

the highlight of the video, is that air comp.

[@ZeroTo60Tube]

you could be right....

[@michaelglass1649]

lol, the eye roll as it comes on here 16:28 adding insult to injury.

[@stevel1973]

I'd quickly leak test the other cylinders, just for comparison.

[@humble1835]

Interesting outcome. Good to see you take the time and effort to explore and document your process, and share it! These cars are fun. Understanding how they work is very helpful. Being able to have a solid, 500+, grocery hauler, that you understand and can maintain, just makes it better. Thanks to you and your fellow content creators.

[@br4d101]

Was funny blocking off the oil cap when the valve cover is smashed to bits 🙈😂

[@ZeroTo60Tube]

haha, thats what i thought too. lol

[@br4d101]

@Zero To 60 id remove the turbos and have a look at the exhaust valves mate, they might be slightly stuck due to the engine sitting for a while!

[@motodigitalvideo]

A wise man once said "don't mend it, send it"! 😄

[@ZeroTo60Tube]

I wish i did just fit it, really don't want to have to pull the head off the e90 motor.

[@chrisrobles2012]

17:30 the intake ports have a hole from the valve cover. I can’t remember if all of them do or just two of them do . They are there for the PCV . I’m wondering if carbon buildup is causing your valves to stick open .

[@VulcanAutoworx]

It’s all 6. I did the external PCV mod, and you tap and plug them

[@emilmetzger4177]

Some things don't add up, allow me to theorize a bit here.... The only way you could be leaking compression into the exhaust would be valves and/or valve train problems, not piston rings. Rings would leak into the sump, which does have a path back to the top of the head(under the valve(rocker) cover) through the oil return passages - there are 5 return passages that allow oil pumped up to the cams to drain back down into the oil pan - if your rings were leaking, that "could" result in hearing some air leaks at the oil fill cap and that big custom widow you've got in the side of your VC, but not the exhaust. As others have stated, there's also the hydraulic lifters. Gunked up intake valves could also be leaking into the valve cover(you'd hear this at the throttle body if your VC didn't have holes in it), as well as leaking valve guides. I'd pull the intake manifold and turbos to have a look at the intake and exhaust valves, a bit surprised you haven't done that already. Might as well pull the valve cover off, as well. Forget the leak down tester for now, rig up a hose and fitting to pressurize the cylinder without all of those leaks in the fittings and o-rings. Use the pressure regulator on the compressor if you need to, but you shouldn't need to - either way, you've already got a leak down tester built into the compressor, just need a way to plumb the hose into the spark plug hole. Pressurize the cylinders again once the intake manifold, turbos and VC have been removed. Make sure you're at TDC on the compression stroke. Unfortunately, it looks like you're on a path to pull the head, regardless. At that point, you might as well re-ring the cylinders and stick new rod bearings in it, at a minimum. It would still be good to keep digging into this and find the root cause of the loss of compression. Good luck. Hope the above made some sense. Don't forget injector seals could also leak compression. Also curious where the broken bits of the VC ended up - could a piece be lodged somewhere keeping a valve open?

[@Mr16bit]

Love the reaction to the compressor, so good

[@ZeroTo60Tube]

Nearly had a heart attack. I was trying to listen for the quiet sound of an air leak, then BAM!!!

[@Mr16bit]

@@ZeroTo60Tube you swore considerably less than I would have!

[@ZeroTo60Tube]

@@Mr16bit My mind went to immediately focusing on controlling bowl movements.......

[@Melbournerider]

This made me remember why I bought the AEG silent compressor

[@andrewjackman5140]

Sticky valve perhaps from sitting a long time in a slightly open position, also cold be a faulty/damaged valve spring. maybe whip the exhaust manifold off and stick a light in the spark plug hole and see if something shines when its TDC, other that, start by taking the valve cover and cam tray off and inspect the valve. also, never attempt to push a gas/air gauge past their stop point, you can damage the internals and make them read higher due to bending the insides!

[@ZeroTo60Tube]

Thanks for the advice. Ended up learning how pressure gauges work last night too....

[@davo705]

At TDC and with tester/air in cylinder you should be able to rock the crank back and forth to let it leak either way, then set to the middle of the two.

[@Saicopateful]

I have the same "quality" leakdown tester. These cheap ones all work the same. However in my N52 all cylinders were reading 8 - 10% leak except for one cylinder with 14%. That one was also slightly lower on compression.

[@hanynowsky]

Was it cylinder 5? And what were your symptoms? Did you find a fix to that cylinder?

[@Saicopateful]

@@hanynowsky No, it is cylinder no 4 and I made another 30k km from that time and all is good.

[@hanynowsky]

@@Saicopateful my N52 compression is Cyl 1 - 210psi Cyl 2 - 195 Cyl3 - 195 Cyl 4 - 195 Cyl 5 - 180 Cyl 6 - 195 My bank 2 is misfiring without error codes. 😥

[@Saicopateful]

@@hanynowsky Semms 5 is off too much. Is it misfiring in this cylinder? Remember that misfire number can be different from normal cylinder numbers (cylinders are labeled differently in misfiring - in firing order)

[@hanynowsky]

@@Saicopateful yea. Off by 29%. I never get a misfire error code using ISTA or INPA as scanners. However the engine suffers from uneven running and shakes while cruising. I am suspecting cyl 5 exhaust valves. Borescope?

[@fabini14]

Even with brand new rings you gona have leak to the sump, is just cold and the gap is big, well at least is just valve, just remove the head grind all the valves, and you are ready to go.

[@musketbal]

listen for the sound of air as the cylinder is rotated to TDC. If you hear air as the cylinder moves up you are on the compression stroke.

[@anthonywhelan8373]

Take the rocker cover off and loosen of the rockers or the cam so no tension on the valves at all then put the compressed air back in the cylinder and that will tell you whether the valves are seating if there not remove the head and hand lap them back in it will get you out of the shit for awhile

[@tuurbow]

I would change those 2 guages on the leak down tester for 100-120psi universal gauges. You can pick them up for 10 bucks each. What you want to see is 100psi in = 100psi out in an ideal situation. Granted you're most likely going to get some leakage. Anything more than 20% is a no go. Air out of the exhaust valve could be a valve not closing all the way, probably due to the fact the motor hasnt been run in a while. Try put a new o-ring on the spark plug end of the leak down tester and it should yield better results.

[@cameronrussell9362]

The air compressor starting was fucking funny!😂😂

[@chrisrobles2012]

9:06 😂 same thing happened to me this weekend. Started a project and left the compressor on. Went back into the garage and grabbed something and the damn compressor kicked on and scared the shit out of me.

[@jamesroberts-yo8wy]

Take the rocker cover off and give the exhaust valves a couple of taps with the pressure in the cylinder and see if it gets better

[@blandpepper2755]

Check Ur timing chain as well we have seen a couple n54s with stretched chains which cause low compression because the valves aren't properly seated during a compression/leakdown test

[@juan-paulpaulsen155]

Hi. If you research engine rings and it seal, you understand that rings need heat and lubrication to seal properly, so you will have a leak on a cold engine, and compressor test will be in accurate

[@ZeroTo60Tube]

As i mention in the video i am trying to work out why cylinder four has less compression than the other cylinders when cold.

[@Rotorcycle]

The piston rings need a gap for when they expand (of course) so that amount of blowby on those not running temperatures could be normal, I don't know, but the valve is supposed to seal when it's close, no matter what. That's an issue for sure. If you take it apart check really good the threads of that stuck spark plug hole for any damage while you're there. :)

[@igotaction]

Burnt exhaust valve, great call Joel, saw it on the first pops.

[@igotaction]

I went back and watched the manual you can see is weaker on the first pop too. #1 was hard to tell because you paused in between and then pressed the starter again.

[@ZeroTo60Tube]

Well I think it’s safe to say you’re in the money.

[@rrodfixrguydude]

You’re always going to get some bleed off into the crankcase especially being a cold engine, with more air coming out of the exhaust side that’s likely where a issue is. I’d pull the turbos and see if any exhaust valves look damaged or burnt

[@cornfedboost]

A messy valve is far better than having to pull the bottom end appart... that air out the rocker cover seemed resonable to me (blowby) looks like all your comp is escaping through those exaust valves... yank the head of clean and inspect the valves give em a lap and re assemble with a fresh gasket would be the quickest way to get it back on the road... or leak down test the other engine if that head passes yank it of that engine and slap it onto the one you just tested with a fresh gasket then the other stuff can be used for the build 😊 hope you can come up with an easy fix man 😊🤘

[@2tbank]

Ive had a similar scenario where i had low compression on Cyl 6. My injector was stuck open just leaking giving the Cyl 6 low compression. So if people are having this problem this may help.

[@oscarolander7455]

Remove your turbos and inspect the valves! Remove your valvecover so you can open one valve independently so you can exclude which one is leaking. You probably also can block of the exhaust port too see how much is leaking from the piston rings.

[@MrCybergladiator]

That sucks mate. I did exactly the same thing with adding pressure and broke my leak down tester gauge. It looks to be the same as yours. Keep up the good work.

[@turbotim9959]

You can't wind the pressure up on the right hand "Leak down Gauge" past the set the set point. You will kill the gauge every time.

[@rushansoubar]

Leak down on cold engine would leak as rings won't be expanded so you should expect some leak down, I would remove rear turbo and inspect the exhaust valve to see if its stuck, on the other hand make sure the valve cover broken parts are not inside the engine somewhere which blocking anything.

[@michaelshannon4138]

Ide pull rocker cover off and make sure your testing on the rock ie valves closed. If you’re still getting air passed exhaust valve then open the exhaust valve and stick camera down I’m. May have a build up of carbon that’s not seating valve correctly.

[@ZeroTo60Tube]

Ok, yes, something else to check. If i can get away with out taking this head off, i will be very happy.

[@michaelshannon4138]

Zero To 60 yea head off no that bad. Feel for me, I blew my ls up on Saturday morning at power cruise. Removed and stripped Sunday. Parts at machine shop today. Hopefully back together on the weekend

[@ZeroTo60Tube]

@@michaelshannon4138 A man who knows what he's actually doing haha. I wish could get it done that quickly. I need to spend hours reading all different symptoms and how how to's then i will still manage to cock it up... Did you get to have any fun at powercruise before it died?

[@michaelshannon4138]

Zero To 60 heaps. Had like an hour and a half straight on track time on Friday. Chopped plenty and got chopped many time to. Only stopped to refuel. Car was running mint until I heard a weird noise and head off track Saturday morning. Didn’t expect big end issue sounded like top end, only pulled it down cause I wanted to know what was wrong

[@peterfoster1035]

You did ad air pressure after the needle had stopped. You may have damaged the gauge

[@ZeroTo60Tube]

I did, i wanted to get some more air going in to the cylinder to see where it was leaking from.

[@peterfoster1035]

You should always wind the air pressure off be four removing the main air supply line to stop the needle slamming back n forth

[@peterfoster1035]

@@ZeroTo60Tube That probably killed it

[@MrCybergladiator]

Yup, I did exactly the same thing and ruined my leak down tester

[@mattcrick2156]

Compressor cuts in, that scared the shit out of me hahahaha you were concentrating hard and boom

[@ZeroTo60Tube]

And in super listening mode....... it was a much louder noise than i was searching for....

[@mattcrick2156]

Zero To 60 it’s like when someone looking under the bonnet and you bip the horn hahaha 😂

[@ZeroTo60Tube]

That is exactly what it was like haha.

[@mulletor123]

Burnt exhaust valve, only option and I have heard of it happen a few times with the n54s.

[@deeyomoma1]

I also have a e90 car with a e92 n54 engine I’m swapping into just getting some information on KZbin to understand how this swap is going to go

[@tdlaustralia7791]

Refresh the head, lapp the valves. Cheap enough if you do it yourself or just send it and see if it comes good.

[@ZeroTo60Tube]

I do have a few actual mechanics to call on to help with what ever happens next... But i kinda like the send it and see option. I want to try and find a few common causes of exhaust valves not sealing properly and then work out what this is likely to be. I mean im sure the valve seat it just cooked, but I might take the turbo off and see if i can see anything strange through the exhaust port before jumping to any conclusions.

[@davidmarion9178]

Set it 1100 psi then measure your leakdown.Make sure to keep crankshaft from turning. Measure at TDC and BDC to determine how bad the taper is. Have fun.

[@Spooly_]

Bit the bullet on the GT6 style "Brembo" calipers, just for the front and 355mm since I'm running 18 inch wheels. 👌

[@punkboy459]

Me: talking Compressor: Boo! Me: Jesus christ you can't just scare me like that you'll give me a heart attack! Compressor: Haha I go Brrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrr 🤣😂🤣😂

[@docgramps1]

I think the E92 is the important thing to focus on. I think it'll help you decide what to do once you know exactly what's wrong with it. I get the feeling you don't want to pull it apart, which I totally get, but it's not like you're going to drive it in that condition anyway. Worst case, the E90 engine runs, part swap over rocker cover etc. and run that gently whilst you sort the E92 at your own pace? Best case, you find what's wrong and fix it and you're back and you can build the E90 engine instead?

[@trackmedixuk]

This channel has confirmed to me that my n54 is never going to stop giving me issues 😔

[@NOne-yt1tj]

Pull the exhaust side off the head and have a looksee. If the valves don't full close at tdc you've found your issue, or part of it

[@stewartdurham2553]

Hi the left gauge is on 0 the right should be at 100% you should not go over 18 psi on left and set right on set if you put to much psi the right gauge will bend the spring in left one. If you think it is rings squirt a small amount of oil in the cylinder and if the psi rises on a compression test it is rings if not probably valves.

[@oliolioli2010]

Pull head off. Upgrade gasket/head studs. Check for other possible damage while apart.

[@DakotaWebber]

The air compressor was gold Check the other cylinders to see if they do anything similar?

[@ZeroTo60Tube]

Definitely need to check the others as soon as i can.

[@husainamin8377]

I think there are two types of leak down tester, one of them you have to set the pressure at 100 then connect it to the cylinder, the other one you connect it then you set the pressure. Get a high quality for such as this purpose, just saying.

[@autoSRI]

I think if it were my car/engine I’d pull the valve cover off and look at the springs and see if any lifters are spongy and then just fit the engine in the car and run it and see what happens as I recon it will come good after a few heat cycles

[@pugs1377]

Pull the turbos and rocker cover. May be a stuck valve and bad stem seal

[@timmyc362]

Been nail biting waiting for the out come. Team N54 stay up.... & p.s. DO NOT REUSE N54 HEAD GASKET 🤯 😂

[@benheynen2705]

Leak down is not the most scientific way of doing it but it is useful and you have to compare cylinders that are good vs not good. You might have 15%leakage and this is normal for some engines as the rings require cylinder pressure to energise properly. Possible with the "lean it out" or the "factory has it too rich for power" might have caused an overheat on the exhaust valve and burnt the seat of both perhaps. Maybe #4 has the most air and runs the leanest therefore is sensitive. You have to monitor both cat and port or turbine in temps (whichever is higher) when tuning as this is what can die if there is no knocking to claim your pistons. Either sort out the leak down tester and do a full comparo or or pull off the manifolds and do a vac test perhaps. I think you can get your engine in the car back up and going before you mess with the replacement.

[@RomeoGoesRetro]

the compressor was hilarious, scared me too ha

[@blrn54]

Pull head off both. See whats wrong. Fix with parts you have. Do it for free. (need cam holder thats a few hundred) Re use head gasket go for it.

[@ZeroTo60Tube]

Holy shit..... re-use head gasket... its like the old days haha. Have you ever had your head off? Did order the cam holder/timing tool thing last week. Do need to work out how it all works.

[@blrn54]

@@ZeroTo60Tube I have only disassembled one n54. Havent put one together yet.

[@silvanlupas7031]

You don’t need the cam holder. I’ve done cam jobs several times without it. You just tighten the bolts in a circular pattern and it should be fine

[@Wheelsanstuff]

If you take the head off, why reuse the gasket?

[@blrn54]

@@Wheelsanstuff You wouldnt. If he wants to cheap out and get it going he can re use it. Might not last long or handle 30psi but it will seal.

[@65Coasty]

If air is coming out the exhaust wouldnt the exhaust valve be open

[@eddiepena2924]

Test other cylinders to compare , fix leaking spark plug hose, also if anything pull the head see why the valves aren’t seating properly go from there keep wrenching brotha 👍🏼👍🏼

[@THEZEST1357]

Right before your on screen message popped up I was like um, doesn't the rocker cover have a fist size hole in it? 🤭

[@ZeroTo60Tube]

It took me a while...... haha

[@THEZEST1357]

@@ZeroTo60Tube ah we all get caught up in the moment when we're trying to fix our car. I honestly think its half the reason people do silly stuff like strip bolts, they don't take a moment to step back and scratch their head. You guys are normally really good with that sort of stuff.

[@ZeroTo60Tube]

@@THEZEST1357 I'll tell you what.... thinking about cameras and microphones and saying relevant things, is brilliant at making miss some blindingly obvious things when im using tools..... haha

[@StratoJohn]

I don't know anything about leak down tests, could it be sticky valves? Could have tried on the other cylinders just to see the difference?

[@ZeroTo60Tube]

I will check the others when i get time. Always short of time at the moment. Somehting to do with editing videos and answering messages and comments haha. Who thought it would be a good idea, to make videos on cars which are well known for problems...... haha #bmwlife

[@eriqrosado3337]

Sup guys sorry I’ve been slacking on the videos. Hey I’ve been looking at e90s and if I find one 6speed I’m gonna pull the trigger on it. Gonna need your help 🙏🏻

[@seanbumbo2107]

Why haven't you added a little oil in tbe cylinder yet?

[@ZeroTo60Tube]

Because that will artificially help the piston rings seal. Wanted to do a dry test to work out why this cylinder was down on compression compared to the others. All tests have been done dry to far.

[@ZijkantLeutn]

Hey @Zero To 60, - I have the same issue with that sh!tty gauge, not much you can do about it :-( - Personally, I would re-test the leak down in the following manner: -- Put on TDC with screwdriver -- Pour some oil in the cylinder -- Set leakdown tester between 60-100PSI and hook it up -- Rock the crankshaft a little bit back and forth with the ratchet so that you can distinguish the airflow and overlap between in- and exhaust-valves. This way you can make sure that you're piston is on TDC, if there's no distinguishable difference between intake or exhaust then you probably have a bent/burnt/broken valve... Just my 2 cents :D

[@ZeroTo60Tube]

Thats a wicked bit of advice. I will try and give that go asap.

[@bwhobackk]

If the leak down air pumped into #4 was coming out the exhaust, wouldn’t that just mean the exhaust valve is open? Watching this at 1.75x so may have missed something.

[@ZeroTo60Tube]

Well not if its at top dead centre. I checked tdc positioning twice. But may have made and error.

[@bwhobackk]

@@ZeroTo60Tube You guys are far more expert than I, plus I was running on like 3hrs sleep. Wishing the E92 a speedy recovery.

[@matstephenson]

Hey man, I am in NSW and have a 335i that I am about to get rid of because the injectors have gone and a few other things. You can have it for $1,500 and freight. If your interested let me know and we can talk.

[@ZeroTo60Tube]

Hey Mat, thats sounds like a bargain. Would you mind emailing some more info to [e-mail]. I'll do some digging on how transport in the mean time.

[@matstephenson]

@@ZeroTo60Tube did you get my email man?

[@ZeroTo60Tube]

@@matstephenson hey man, it went in to gmails spam folder, i have just found it, i will reply now.

[@ZeroTo60Tube]

@@matstephenson Hi Mat, i did reply on Saturday. Wondering if my reply has gone to your spam folder now?

[@stephenbell8337]

Bought the ms a 335i, I'm scared. Need to do a comp press before I do anything?

[@ZeroTo60Tube]

If you have just bought it and have a warranty, yeah i would do one just incase you can get it fixed under warranty if something is wrong. However if you don't have any symptoms of issues, i wouldn't worry about.

[@deeyomoma1]

Lmfaooo that compressor having you a bit scared Lmfaooo

[@eskania]

I think smoke test is the best easier.

[@mikenaz1230]

I have the same tester. Works fine. Some hissing from the valve cover is normal for all cars. No cyl is a perfect seal. Especially cold. Aslong as its consistent between cylinders. Engines fine. Run it !

[@andrewk8057]

hey mate, on a different note where did you get the china spec intercooler from + did you have catless dumps? I'm tryin to get my hands on them from vrsf but its like playin cat and mouse with them. theyre in stock, you order em, they get put on back order for another month, repeat. It's a joke so I'm gonna go chinese

[@ZeroTo60Tube]

It's getting a bit silly at the mo trying to get stuff from VRSF, i guess it means they are busy at least. I went with this one. bit.ly/35B2Ip6. I didn't list it at first as i wanted to make sure it lasted a while first. But it's been sweet. I will add it to the parts list i think.

[@MatthewGlad]

Build the engine give it a port job, valve lap and put another piston in from the other engine. New bearings fixed!

[@Peterpetty1]

^ what this guy said

[@MatthewGlad]

@@Peterpetty1 I made this comment before I even watched the video. Might as well do a set of rings while he is at it. Don't think he really needs forged as the turbos can't push more boost. With a crazy single turbo and higher boost then forge!

[@ZeroTo60Tube]

It's time and money to get it done. Both of which i don't have at the moment. I needed to make sure it needs to be built before stripping it down.

[@MatthewGlad]

@@ZeroTo60Tube You can port it yourself and do the valve lap, all you need to buy is gaskets. If you spend a little more then do the rings and bearings. kzbin.info/www/bejne/i5fSpmuIgqapotE

[@Fix_It_Again_Tony]

I think you can just install a 0-100 psi gauge on the right side of the tester and then find the difference between the gauges and calculate the percentage from there. The OTC gauge literally has two 0-100 psi gauges. Check out this procedure for the it: www.otctools.com/sites/default/files/0001-000-3898_5609_label.pdf I think you need a good amount of pressure to do the test. The 10 psi or whatever the leak down tester originally said 0% leakage was isn't enough I don't think. The OTC table lists 75-100 psi. I think enough pressure needs to be delivered to emulate combustion pressure to better seal the rings. Also why don't you take the turbos and intake manifold off to make it easier? You could clean up the intake and exhaust ports and maybe be able to isolate which valve is leaking. You could stick a microphone into the port and see which valve makes more noise from the air rushing out. I tried CRC Intake Valve and Turbo Cleaner last time I walnut blasted and it works really well. I used it in addition to the blasting.

[@ZeroTo60Tube]

Thanks for the info dude. Brilliant idea with the turbos and intake coming off. They need to at the end of the day. Just been a little short of time and we really need to get the S62 back together before taking another engine apart in the shed.

[@PULSARGT]

20% is normal, i wouldn't worry about it, even brand new engines have about 10% leaks, as long as you are in the green and not yellow you are doing good. Just make sure you keep your gauge at zero when you do the measurements. Don't bother removing the heads, I have done over 200 leakdown tests and that is normal for a used engine, as a matter of fact, this engine is super clean for a used one. Repeat the test for the the other cylinders and if they are the same, you have a good engine. The 20% drop is from the carbon built up on the values nothing to worry about.

[@ZeroTo60Tube]

I am concerned the gauge isnt working properly.

[@bluebook944]

I have the same Chinesium leakdown tool, and can confirm that once it's set, and you connect the spark plug tube to the main unit, leakdown gauge goes to about 65%, But if you press the valve in the main hose before connecting the spark plug hose, it goes all the way to 98%. So in the setup the spark plug hose is a further restriction. Next thing I noticed is you should be seeing a huge difference in TDC between one 360deg and the next - one should have the exhaust valves very open. I'd try again but on a different cylinder of that engine, maybe another known good engine altogether. Those leakdown tools are a bit shit, but they can be used as a comparison tool. Oh, and you absolutely need to nail all the leaks (including the spark plug) before you start, you'll get random results otherwise

[@ZeroTo60Tube]

Thanks for the information. I think i need to replace the o-ring on the spark plug fitting to sort that out. It all just takes so long for someone who has no idea what he's doing lol.

[@piroozhr7968]

@@ZeroTo60Tube can you attach the fitting from your compression tester if fits? Just apply for a refund asap and they don't even bother to ask to return it! I have tried a few of these ebay gauges and most are crap...

[@jackturner990]

Just came to check if you have uploaded something yet. Uploaded 2 mins ago, hahahah

[@ZeroTo60Tube]

Timed that pretty perfectly. ha

[@glennarnold3970]

i have a e90 335i coupe as well while you have the engine out pull the exhaust manifold and clean all the carbon from all the valves exhaust and inlet there are spray cleaners out there for this exact job if you have just a micron of carbon on the valve face or seat its gunna leak if the motor has done over 120k i would suggest cleaning the valves and get rid of the carbon build up its a big problem with direct injected cars in general at least taking off the exhaust manifold you can get a real good look at them peace of mind anyway you also need to take into account it has vanos it could also be a sticky valve, drain the oil if it looks like shit put cheap oil in it and a bottle of engine flush run till hot change oil again cheap stuff run till hot again drain then put good synthetic in it.i would suggest you pull both vanos solinoids at the front of the motor and clean the filters on the end of them as well. before you pull the e92 engine clean the vanos filters and see if it fixes your leaky valve you might be getting oil starvation on the valve train couldn't hurt 10 minutes to pull the solinoids and clean then if there is carbon build up on the e90 n54 then there is a possibility the e92 n54 has the same problem plenty of youtube video's on how to clean them hope this helps

[@nonameyoutuber-l2r]

I love how this guy buys the cheapest tools then hates them 😂

[@Bmw_doc_pl]

your turbo outlets looks like RHD?

[@ZeroTo60Tube]

Yes this is a RHD car.

[@Tracked350Z]

TDC but on which stroke?

[@dirkdaumberger]

I’m with you, needs to be on compression stroke TDC. Set tester too 100 psi

[@ZeroTo60Tube]

That is why i did the test twice, the second time i rotated the crank 360 deg. So one of them should have been on compression stroke.

[@Tracked350Z]

@@ZeroTo60Tube you are correct sir.

[@charltonnel]

When that comp starts up lol

[@cyberspooky]

The hole in the rocker cover lol

[@kenrossaukrsa]

Hi you could of taken the head off by now lol. I still stick to a burnt valve or valve seat has come loose from the head ;)

[@ZeroTo60Tube]

Well yes... but i was really hoping it was a stuck ring......... ohhh well.

[@kenrossaukrsa]

Zero To 60 can’t a stuck ring be tested by pouring some oil down the spark plug hole and then testing the compression , am not 100% sure - just guidelines

[@michaelpaterson1454]

I feel for you mate. Go borrow some decent gear and seek advice on how to do it correctly. Even tdc is a bit of a guess really, either side and your results will be off. Keep the content coming though 👍

[@kouki_integra]

Try Teflon tape

[@musketbal]

I can tell by your accent you are from Texas, Right?

[@ZeroTo60Tube]

close ;)

[@ichoozjc]

You'd need a leak down tester for your leak down tester 🤣

[@ZeroTo60Tube]

lol thats quite funny. and accurate

[@nonameyoutuber-l2r]

15:28 😂😂😂😂😂😂😂😂😂

[@RK-ed1em]

The HF leak down tester is awful. The leak percentage gauge on there is useless and the pressure gauge on the left is only showing 20psi going into the tester. What you want is the OTC leak down tester, which has two identical pressure gauges, one showing the pressure going into the tester and the other showing the pressure in the cylinder. Then you do some simple math and get an accurate result. 100psi going in and 90 psi in the cylinder is 10% leak. Alternatively, you could convert your current leak down tester by swapping another pressure gauge where the leak percentage gauge is located. Perhaps a tire pressure gauge would work or even the one from the compression tester.

[@130bowman]

Set input pressure to 80 psi the second gauge should read at least 70 psi. Your gauges seem not right. You are reading a pressure drop accross an orifice. Talk ti an airplane mechanic to show you how to do the test. Aircaft piston engines are leak down tested every 100hours. If exhaust valve is leaking past the seat you can stake the valve by striking the valve stem with a hammer and drft to knock the carbon off of the valve.do this while pressure is applied. Usually done on a warm engine. Sqirting oil in spark plug hole will verfify if it is the rings.

[@chadjones99]

When the compressor came on you thought the engine got you

[@maxmoughal5183]

Dude test the other cylinders for comparison.

[@MrFabeRick]

🤔🤔🤞

[@jasonaldenhaley1]

Ha! "Not what I was hoping" thumbnail...is that what "Johnny 5" (from 80's movie 'Who's Johnny' fame; infamy? -Pictured-) is sayin there a week after that auction and some "tuning/suspension"...'mods' (CLEARLY!) in tryin for that 2.9 sec 0 - 60?? HA...j/k!! Idk, to me...assuming the gages are his eyes, k i n d a... maybe...MIGHT...almost l👀k like some kinda robot/brobot?? I COULD HOPEFULLY be hallucinating also?? Hmmmm...that WOULD explain the purple king cobra singing Tom Petty's "Free fallin" at my footboard i reckon!!

[@ZeroTo60Tube]

Dude you should be writing books or short stories or something. Your comments are next level haha.

[@jasonaldenhaley1]

My 4 daughters WILL be mortified when i show 'em your kind words. I can ALMOST get their POV....ya know...after a COUPLE "Dad puns" (RE: 17 or 18 thousand), they MIGHT NOT see it in your same light. A light in which, dare i say, IS the perfect amount of lumens!! Nearly the best ever was my now 17 yr old (i KNOW, "ZOIKS SCOOB!"), without missing a beat after rattling one off, i did the "baa dumm dumm..." but before i could get the "tssss" of the cymbal uttered (absolte perfect timing here) says, "NO!" Apparently me & the Famn damily slipped the "FUNK" in 'dis-funk-tional', roofie/Cosby style!?!

[@jasonaldenhaley1]

OH TONIGHT SHALL BE A HOOT (say a prayer for them...Aleena, Anika, Adria, & Alivia)!!!

[@jasonaldenhaley1]

...oh, and good luck with "Johnny"...I, for one, can't wait to see it shred tyres (down under approved spelling) again!!!! 👍

[@baims8367]

O man this vid was tough to watch 🤦🏼‍♂️

[@davidmarion9178]

Sorry should be 100 PSI repeat 100 PSI

[@npharkes]

Read the manual HAHA

[@paulsimpson8990]

So in conclusion, don’t buy a cheap leak down tester!

[@ZeroTo60Tube]

Definitely not. :| I should know better than this by now.

[@bfunmaker]

Never buy cheap anything!

[@chadjones99]

Your funny

[@TopiAS06]

what do i think?, you have god damn bad luck

[@ZeroTo60Tube]

I have to agree with you on that one... and you what they say "Great minds think a like". haha