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REVIEW: Cleaning of intake valves with BMW walnut shell blasting tool
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12-26-2016, 10:51 PM | #111 |
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12-28-2016, 02:26 PM | #112 |
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Now when my engine is being fixed I will make the mechanic open the covers so I can see inside the cylynders. I don't know if this procedure was ever done to my 190k km car so I guess it is a must. Also here in Bulgaria it costs under $150.
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12-28-2016, 04:26 PM | #113 | |
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04-30-2018, 11:08 AM | #114 |
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how do you tell if the valves are closed? Isn't there 4 positions to the valves so It would be possible for one of them to look closed but is actually open?
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04-30-2018, 12:46 PM | #115 |
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They open together so look down the intake side on the head and turn the Engine clockwise until you see the valves open and the Close. Turn a quarter turn after they Close and start cleaning. when youre done make sure the pocket is Clean and continue to the next cylinder with the same procedure until youre done
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04-30-2018, 01:08 PM | #116 | |
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04-30-2018, 01:31 PM | #117 |
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Up, you better be sure that they are closed when you begin cleaning or you will have a big problem, take a good look down the intake and turn the motor to understand when they are open and closed. You dont want to get it wrong.
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05-01-2018, 06:14 PM | #118 | |
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You need a flash light to look into the intake valve. When you see not a lot of valve stem and the plate part of the valve up, it's closed. You can always test to see if it's closed by spraying either seafoam intake cleaner, or brake cleaner in the valve to see if it holds water so to speak. Obviously, if the valve is closed it will hold "water" much like a kitchen sink. |
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05-02-2018, 02:11 PM | #119 | |
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05-02-2018, 08:29 PM | #120 | |
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05-15-2018, 09:10 AM | #121 |
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Never thought of the alternator pulley method, good one, Kevin and thanks.
I've been reading this thread because I'll be doing the cleaning for my buddy's car. I have a garage full of tools, the blaster, and a 20-gal compressor. I've done this on the Mini Cooper S many times, just never done it on the N54. Also, to add something useful for everyone here, the way I test to see if the valves are closed or not here's my way: I remove all the spark plugs to use that opening by feeding my vacuum tube into it. On my vacuum, I just have to make sure it's clean first, then I reverse the air flow so I can blow high volume air into the spark plug holes directly into the cylinder. On start, I'd do this through all cylinders to see which intake valves are completely closed, because you'll get no air coming out of the valve side, use you hand to feel it. I'd start walnut blasting with those closed valves first. Then when I get done, I'd go after the other valves by turning the crank, in this case, I'll adapt Kevin's method by turning the alternator, to set up the other un-cleaned valves. Now the only piece I'll need is the port adapter piece. I did modify an S-shaped coolant pipe to fit into a MK-6 VW Golf GTI port before. The vacuum works great, but the port match was poor, so it made a good mess despite being a little efficient. With the right adapter, it would save a ton of shell leaks or outside spraying for sure. If there's anyone needing this service done in Houston, TX, I don't mind to help on good weather weekends.
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10-09-2018, 09:00 PM | #122 | |
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01-02-2019, 10:24 AM | #124 |
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Long thread, don't really feel like going through every single comment but maybe someone can answer these two questions for me.
What is the consensus on using the cheap portable Harbor Freight abrasive blaster over the bigger 20 pound kits? Seems like some people have used it without issue What about the 3D printed, plastic vacuum nozzles, are they any good? I've heard they're junk and break but I feel like $70 or whatever for the metal tool is a bit much. I'll get the metal one if needed but I wish I could just rent one for $10 or something to be honest. |
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01-02-2019, 05:28 PM | #125 | |
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I made my own vacuum attachment elbow using a 90 deg PVC pipe slip fit elbow (1" if I remember correctly). I heated one end with a heat gun to soften it and formed it into an oval shape to fit the head ports. I ended up doing a little filing and wrapping with paper tape to get a good snug fit in the head. Then I drilled a small hole in the back of the elbow to accept my spray nozzle 1/4" brake line. The other end of the PVC elbow fit onto the end of my shop vac hose and was held in place with duct tape. |
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01-03-2019, 09:35 AM | #126 | |
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So you're saying you used one of the red abrasive blasters? The portable one I was referring to is grey https://www.harborfreight.com/portab...kit-37025.html Here's what I think you used? https://www.harborfreight.com/20-lbs...ter-68994.html My question was in reference to the cheap portable one and whether or not that would work. The 20 pound unit looks like it would definitely work. I'm just running out of space for all my tools so I'm hoping I don't need this big ass abrasive blaster sitting around after only using it for a few hours. |
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01-03-2019, 02:10 PM | #127 | |
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01-03-2019, 03:18 PM | #128 | |
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01-05-2019, 10:04 PM | #129 | |
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01-05-2019, 10:19 PM | #130 |
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Here are a couple photos of the results of my walnut cleaning. My valves were really grungy before I started cleaning. At the time, my car had >100,000 miles and I don't know if they had ever been cleaned (I bought the car with ~70,000 miles).
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01-11-2019, 03:18 PM | #131 |
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What about using a pancake compressor? I have a shitty little pancake compressor, I forget what compressor my father has although I don't think it is much better.
I don't mind buying tools that I will get use out of but a big ass compressor would be a waste unless I was doing a walnut blasting |
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01-12-2019, 07:01 AM | #132 | |
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intake valves, walnut shell blasting |
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