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SIB 11 03 14 BMW diesel walnut blasting
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07-28-2016, 03:15 PM | #67 |
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Good ideas in here about verifying TDC. I'm going to attempt to do my CBU tonight without pulling the valve cover; I just don't feel comfortable fucking with a fuel system that's at 22,000psi, plus everything else required to get it out.
My plan is to insert the blasting wand all the way down to the valve, then pull it back up slowly, watching it's position with the boroscope. Then when it gets to the plastic bit of the runner, apply a piece of tape to the wand just where it exits the runner so that I can see my "limit"; that way I know not to pull the wand out past that point where it could spray/damage the plastic. I also figure I should clean out as much gunk as I can before blasting with picks and other tools, to make it easier. The good news is that my CBU doesn't seem too horrible and I think my boroscope will let me see the valves to verify TDC without having to clean it out first. |
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07-28-2016, 10:29 PM | #68 | |
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i think you're too occupied with the big #s (22,000psi), the pressure will deplete over time, if you engine is off for a 1/2 day or more i think you shold be ok. I pulled everything becuase i wasn't sure how to check, although now that i know, i will never pull the valve cover anymore.
I sent you email with as much info as I gathered to verify each cyl is in the TDC. Hopefully this helps. Quote:
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07-29-2016, 12:04 AM | #69 |
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The pressure is much much lower at idle and probably has a shut down procedure that includes releasing most of the pressure. You aren't going to spray a hole in your hand disconnecting the rail.
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07-29-2016, 10:22 PM | #70 | |
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I had fuel come out but i would call it drip out and not spray out. |
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07-29-2016, 10:25 PM | #71 | |
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I will definetely do this next time (probably wont be a next time because i'm blocking the egr asap and then possible will get the jarek tune as long as he doesn't put some spider boot something on my ecu) But maybe if if I have another car with a 35d motor. |
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08-01-2016, 03:44 PM | #72 |
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03-23-2019, 05:41 PM | #73 | |
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Can you explain the TDC process
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03-24-2019, 12:22 PM | #74 |
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I pulled the Valve Cover to do mine. You can get to the one set of ports much easier.
Also you can easily determine when the valves are closed, just by looking at the cam. Off lobe = closed/ on lobe= open |
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03-24-2019, 04:19 PM | #75 |
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TDC DYI
Can someone show how to achieve the TDC? Nothing out there for diesel engines.
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03-25-2019, 06:15 PM | #76 |
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Just use a borescope and look inside the intake manifold and watch the valves open and close when bumping the starter. It will be super obvious when the valves are closed completely. Watch the valves open and close a few cycles and you'll see what I mean. Also, there is a hole in the flywheel to put a pin (or allen key) into on the transmission (drivers side) housing that will also line up when it is a TDC.
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04-08-2019, 08:31 PM | #77 |
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04-08-2019, 10:57 PM | #78 |
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04-19-2019, 04:51 PM | #81 |
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Cleaning Intake
I just wanted to post my results. I brought my car to an Indy Because I didn't quite feel like I was comfortable with finding TDC.
I didn't trust that anyone local knew how to do this job right and I wasn't sure I was comfortable ensuring TDC myself, but I wish I had trusted myself now (because I care and take pride in MY work). Now that I have read up on it for days and had a couple people coach me on how easy it is (just time consuming and messy), days I decided to redo the crappy half job that Mark from Total Precision did to my car. Hopefully he didn't mess anything up. The good news is at least the 6 valves that he did blast look pretty clean. I will probably hit them again just to get them perfect since I'm deleting now and don't want to ever have to do it again. Anyway. He the shop gave me my intake back still dirty. He said it was the best he could do. I was annoyed and disgusted. I really can't believe a shop that claims to be a BMW specialist is this incompetent. I Posted on FB North American Diesel group asking what the secret formula is that someone like AARodriguez is using in his ultrasonic bath for intakes. I saw someone mention that not only does he do ultrasonic but he has a system of hoses running the degreaser thru. That gave me the pool pump idea. My intake was still very dirty even after Total Precision gave it back. He really only got the first inch of the ports clean the rest was still gummed up. SO here is what I did: I bought a 5 gallon bucket of Purple Power industrial degreaser $30 at most auto parts stores (might need an additional 2.5 gal jug depending on size of container you use for the bath). I put my intake in 100% pure Purple Power overnight. I used an old pool cover pump (relatively low pressure, normal garden hose output). I cut an old washing machine rubber hose short (12 in long) and put the output end of the hose in the big opening of the intake so the Purple Power was flowing thru the intake all night. For a little extra ultrasonic kick I also put the lid on the retangular box I was dipping the intake in and a pad sander on top of it running for two hours. Not sure if that was necessary but whatever, it all worked amazingly. Next morning I pulled the intake out and to my delight it was perfectly clean like brand new. No scrubbing, no power washing needed. I hosed it out good and dried it with compressed air. DONE. Why on earth could a BMW Indy shop not do this properly it was so simple! Then on to the walnut blasting. I brought car to him with the intake off ready to be blasted. When I picked it up he had only done the valves on the easy side. He tried to tell me both valves were in the port. He simply did not want to deal with the plastic tangenial ports (either he was lying or he's stupid). Anyway I bought a $30 Harbor Freight media blaster and modified the wand with a 1/2 barb fitting the presses in where the Harbor Freight gun has a removeable ceramic tip. The other side of the barb I put a screw on 1/4" compression fitting that accepts a long piece of bendable 1/4" copper tubing. I will be using that to redo the crap walnut blast job. Thanks to Chris from FB North American Diesel group who took the time to explain to me how he did the job, it gave me the confidence I needed to to this myself. Last edited by at100plus; 05-03-2019 at 04:57 PM.. |
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04-22-2019, 10:22 PM | #82 | |
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Just finished blasting. Definitely recommend a good water filter setup on your compressor. It got humid today and it started taking a really long time to get a valve clean then I realized I wasn't flowing media a lot of time. Couldn't really tell because I had the vacuum attached. Turned out to be clogging due to water getting to the gun. I was using a dessicant snake but I guess it got full. It did take some time. I still want to go back and touch them up one more time. I had a hard time getting my 3/8 OD wand to hit the forward most edge of the valve. |
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