X5 4.6 Build - Page 4

X5SND · #31 10-23-2012, 12:15 AM

Sooooooo what IS this second "Secret" step?.......im sure if we dig up the ol' forum rules you'll find under the "uncharted modification territory act" it states: "Xoutpost shall be subject to complete and full disclosure regarding any and all planned modifications".

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PersonaNonGrata · #32 10-23-2012, 12:57 AM

Okay guys, we don't want to shut down this thread. papasmurf has an interesting project going and the thread needs to stay on topic. Thank you.

papasmurf · #33 10-23-2012, 08:45 AM

Quote:

Originally Posted by tynashracing

Probably not as scientific as you would likely require. But, since using Mobil 1 5-30 extended life...I'm dealing with start up noise coming from the timing chain. I've changed the tensioner and it helped for a day or so.
Prior to the oil change, I wasn't getting any sound from my timing chain. Coincidence? Maybe, maybe not.
I'm going to change it up and see if this situation improves. I cringe every time I start the truck and get the sound.

papasmurf, sorry this has gone on too long. Stickley is a good guy and knows his $hit.

Not to scare you, but I had the scary start-up noise for awhile (read: about a year) before the bearings really let go. I should've been smarter when the noise would stop the first week after an oil change, then would come back (other than the first oil change i did around 65k, it was all Mobil 1/Mann) The car was previously owned by a friend who did oil changes frequently with BMW Castrol, and the noise was never there.

JCL, never got an analysis on why the bearings failed. I would be happy to mail a bearing to you if you're curious. They were wiped out. The crank was machineable, however I scored a spare 4.6 long block for 1300 bucks, so I started with that.

I'm not going to post anything about Step 2 until the car's running, which will hopefully be by the end of the week. Sorry, I'm a tease.

NicholasW · #34 10-23-2012, 09:53 AM

What's your expected power numbers? Before and after the power adder. Thanks for the input on Mobil 1. It's not worth the risk IMO, I'll just run what BMW recommends.

tynashracing · #35 10-23-2012, 10:01 AM

Quote:

Originally Posted by papasmurf

Not to scare you, but I had the scary start-up noise for awhile (read: about a year) before the bearings really let go. I should've been smarter when the noise would stop the first week after an oil change, then would come back (other than the first oil change i did around 65k, it was all Mobil 1/Mann) The car was previously owned by a friend who did oil changes frequently with BMW Castrol, and the noise was never there.

JCL, never got an analysis on why the bearings failed. I would be happy to mail a bearing to you if you're curious. They were wiped out. The crank was machineable, however I scored a spare 4.6 long block for 1300 bucks, so I started with that.

I'm not going to post anything about Step 2 until the car's running, which will hopefully be by the end of the week. Sorry, I'm a tease.

Thanks for the heads up papasmurf. As I suspected...it's likely not coincidence that I'm getting this noise with Mobil 1. Same here...previous oil changes with BMW fluid.
I'll either go back to BMW fluid or try Amsoil.

BTW, I always buy my filters from the dealer. Costs more, but I have peace of mind.

electricalserv x5 · #36 10-24-2012, 07:12 PM

I did the same thing, I was lucky because I did,nt blow a rod,I ended up rebuilding the whole thing.
Yes Moble1 and bmw don,nt mix.................
Make sure You have a new oil pump,and make sure that the oil system is flowing well, it is extremly important................oil flow is every thing on these engines..............