Semaj4712 - 72 BMW 2002 2.7 M20 Turbo Build Thread

[jwill214]

Seeing your metal cell makes me wish I had gone with that one rather than the plastic bladder I got. Glad to see you're back working on the 02. Awesome build.

[semaj4712]

Seeing your metal cell makes me wish I had gone with that one rather than the plastic bladder I got. Glad to see you're back working on the 02. Awesome build.

I was pretty determined to find a nice aluminum tank, the plastic ones are very affordable but then I found the summit brand tanks. Which this is, and it's very very nice quality. And the price point was really good.

[pandaboo911]

Semaj4712 - 72 BMW 2002 2.7 M20 Turbo Build Thread

Does it have a rubber liner inside? Or just straight aluminum

Also that's the most epic update I've ever seen on this forum. It has everything lol

[Javier h]

Ouch

School me on S54s. Why does the timing chain snap?

I thought they are suppose to last the life of the car; well at least for an m10 they do.

Wasn't there a recall on the 05/06 motors for bad bolts used in the VANOS system?

[ThatOneEuroE30]

Good lord. What an update. You've got some toys...

[semaj4712]

Does it have a rubber liner inside? Or just straight aluminum

Also that's the most epic update I've ever seen on this forum. It has everything lol

No not a rubber bladder inside, but it does have foam.

School me on S54s. Why does the timing chain snap?

I thought they are suppose to last the life of the car; well at least for an m10 they do.

Wasn't there a recall on the 05/06 motors for bad bolts used in the VANOS system?

Not sure, I was under the same impression myself, but as it turns out I found at least 4 or 5 people with the same problem, sometimes with as few miles as 70k...Mine was at around 152k so I am not totally surprised, also I had an oil sample analyzed by Blackstone and in their findings, there was a large amount of Iron found in the oil. So something was definitely grinding somewhere which may have had something to do with it.

The Vanos bolts did not back out like what is common on these motors, but it does appear that something either locked up or something on the exhaust side, not sure what came first the exhaust cam lock up or the broken timing chain.

[sam_]

that tat is so sick - that M3 looks really clean, glad you're taking care of it!

[semaj4712]

So you probably didnt notice, but I did not post what we made my father-in-law for his birthday this year...and thats because it was still en route to him. But he got it today and so I figured Id share with you guys.

So long story short my father in law races his model a, and his hood ornament got wrecked getting pulled off the track about a year ago...

Heres the best picture we have of the old ornament


so we decided to replace it for him but we could not find anything like it...so we opted to make our own.

I started not really knowing how I was going to 3d print it, but rather just that I would model it and them print it afterwords.

So I started with this


And ended up looking like this







So then once the model was complete the task of figuring out how to make it into an actual tangible item started...I wanted the end product to be a metal and preferably chromed...Also I would need to tap the bottom to allow mounting

I found a company in belgium that was able to print a wax version and then sand casted that with brass, then chromed and a month later, this showed up...




On another note the M3 should be finished and ready to pick up tomorrow or Friday!

[Sh3rpak!ng]

WOW dude thats incredible!!! Your father in law must've had his mind blown. Seriously cool. Thanks for sharing!

[TeXJ]

Dude that is awesome! Mind if I ask how much that cost? would make a great idea for gifts

[semaj4712]

Semaj4712 - 72 BMW 2002 2.7 M20 Turbo Build Thread

It's not cheap...I think I paid somewhere around $500 bucks, but that's after the modeling which I probably had nearly 50 hours into the actually 3d model itself.

Oh and then we had to tap the bottom, I forgot to add a pic of doing that with my machinist buddy Pete

[varg]

That hood ornament is sweet. You weren't able to have that done domestically though? Everyone and their dog is 3D printing these days and foundries can be found in every state. My mother sculpts, I love seeing her pieces go through the stages; clay, mold, wax, bronze.

[semaj4712]

I could have probably sourced it locally although they were the ones offering the complete process, they printed it in wax and went straight to the sand casting of brass. I am pretty sure if I had it printed in wax and then shipped to me or a foundry it would have been destroyed in the shipping process.

[paynemw]

i hate this thread.

You know why, because squirrel.... that's why.

You have all of these FREAKING AWESOME toys coming in and out of the picture. I see one, then I'm like, where's that build thread? Oh, and what about this build thread?! There's no way I could manage what you do man. Keep up the craziness and the cool work.

[rzerob]

Awesome update. I was worried this thread was dead.