CNC'ed Aluminum Water Tree Adaptor for DBB Turbo Upgrade
#91
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Paul:
I can't figure it out myself. The only thing I can think of is that somewhere in the process, a tap broke and somebody replaced the tap in the CNC spindle with the incorrect pitch. The good news is that at least two are still good and possibly more. I sent all the remaining pieces to Jim. He is going a different route, but maybe since I all ready had my mom ship them, he can check to make sure the rest are M14X1.5. At least I will have one to ship to LR for my ongoing nightmare. The machine shop told me today they will replace all that are incorrect for free, so I am good to go there. Unfortunately, that won't happen before Friday and I am unclear when I will be back here. I can always have them ship them to me. It was actually not that expensive. I FedEx'ed quite a few parts I had made up to LR and it only cost me $50 dollars for 3 day air. I thought that was very reasonable for a 15 pound package sent half way around the world. I spent nearly that amount via snail mail to you and that is a short hop. I learned a big lesson there!
PS: For sure they used a tap and didn't turn the threads. The tap is loaded into a collet and the machine automatically picks it up out of a rotating spindle, depending on what is needed at the time.
I can't figure it out myself. The only thing I can think of is that somewhere in the process, a tap broke and somebody replaced the tap in the CNC spindle with the incorrect pitch. The good news is that at least two are still good and possibly more. I sent all the remaining pieces to Jim. He is going a different route, but maybe since I all ready had my mom ship them, he can check to make sure the rest are M14X1.5. At least I will have one to ship to LR for my ongoing nightmare. The machine shop told me today they will replace all that are incorrect for free, so I am good to go there. Unfortunately, that won't happen before Friday and I am unclear when I will be back here. I can always have them ship them to me. It was actually not that expensive. I FedEx'ed quite a few parts I had made up to LR and it only cost me $50 dollars for 3 day air. I thought that was very reasonable for a 15 pound package sent half way around the world. I spent nearly that amount via snail mail to you and that is a short hop. I learned a big lesson there!
PS: For sure they used a tap and didn't turn the threads. The tap is loaded into a collet and the machine automatically picks it up out of a rotating spindle, depending on what is needed at the time.
Last edited by URG8RB8; 07-09-2013 at 12:16 PM. Reason: forgot to answer question
#92
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I would have thought they used a tap also.
Maybe you're right. it could have broken.. But when does a tap break in Aluminium? only thing is to see what actually fits inside it?
Maybe you're right. it could have broken.. But when does a tap break in Aluminium? only thing is to see what actually fits inside it?
#93
Ok I haven't had time to run to the store to try out various bolts (I don't get home until 8:00 or so, usually) but I did try a couple "knowns" I had kicking around and ya know what threads in nicely?
A 1/4" NPT fitting I had kicking around.
A 1/4" NPT fitting I had kicking around.
#94
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Jim:
Please let me know if you received the additional parts. Thanks!
I heard back from Jim, all the others are correct, go figure! At least I have one to send to LR soon.
Please let me know if you received the additional parts. Thanks!
I heard back from Jim, all the others are correct, go figure! At least I have one to send to LR soon.
Last edited by URG8RB8; 07-13-2013 at 09:30 PM.
#95
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I would like to provide a brief update to this since I received quite a few questions about how a machine shop could screw up a couple of the parts in a lot of ten. I too wondered how this could happen. To make a long story short, they didn't. I received the parts back from Jim last week in Cali. I flew them back home to Florida with me on Saturday. I did not have a M14X1.5 tap here in Florida but did have a thread pitch gauge and calipers. I was scratching my head when the pitch and through hole size was correct. I just went to Napa and bought a tap for $6.50, because I could not find a M14X1.5 bolt. I was able to screw the tap in by hand. It caught a couple times on some small burrs or something, but other than that I see nothing. I have now ran the tap through all of them and some are slightly tighter than others, but no issues. I will ask LR to run a tap through mine as well to see if that one is truly screwed up or just has a burr.
Last edited by URG8RB8; 07-23-2013 at 05:15 PM.
#96
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Hmm, probably when tapping the other holes, the thread could have gotten caught on the sensors thread. This always happens when screw cutting or just cutting off an end of a thread on a bolt. Just needs to be loosened up.
#97
Well glad to hear it seems like you can just clean up the threads.
As you can see from the pics I posted earlier, I couldn't get either the AN fitting or the OE sensor to thread in more than a thread or two. Once you run the tap through it I'd recommend making sure you can get the sensor threaded all the way in before you ship it to somebody I couldn't see anything wrong with my eyes, and walked a small dental pick down through the threads and didn't feel anything... but that doesn't mean there wasn't a burr or something.
Funny that both LR and I got the two with burrs and the others are A-ok though. What are the odds?
As you can see from the pics I posted earlier, I couldn't get either the AN fitting or the OE sensor to thread in more than a thread or two. Once you run the tap through it I'd recommend making sure you can get the sensor threaded all the way in before you ship it to somebody I couldn't see anything wrong with my eyes, and walked a small dental pick down through the threads and didn't feel anything... but that doesn't mean there wasn't a burr or something.
Funny that both LR and I got the two with burrs and the others are A-ok though. What are the odds?
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Yes, my bad. Learned a big lesson here, never assume anything, especially when half way around the world.
Paul:
I think you are correct about the M16 threads cutting into the M14 sensor threads. If I had it to do over again, I would not ask for maximum full thread contact either. I thought it might assist in sealing but it makes threading the adaptors in very tight. I failed to specify chasing the threads after completion as well. Live and learn. At least they were salvageable.
Paul:
I think you are correct about the M16 threads cutting into the M14 sensor threads. If I had it to do over again, I would not ask for maximum full thread contact either. I thought it might assist in sealing but it makes threading the adaptors in very tight. I failed to specify chasing the threads after completion as well. Live and learn. At least they were salvageable.
#100
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Thom, if I had a CNC Mill or a 5 axis. I'd be machining every part on my engine that has been customised to work with my setup. But in australia, there's a small market for smaller manufactured parts.
Parts from Water adaptors, turbo mounts, fly wheels, trigger wheels, throttle bodies, flanges..ect..
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From: In the garage trying to keep boost down
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