Quote:
Originally Posted by Factory6speed
Cool thread I don't think I saw all this
The berryman chemdip (comes in a paint bucket) and is the best I've found to clean Pistons. Just don't let it sit in there forever and rinse it good. It eats the carbon.
For about a year I've been trying to get this b58 in the car. I kept getting strange readings with the plasticgauge and had get the mic set and dial gauge going. I don't know about this particular engine but the b58 everything is torque to yield so you can't really get anywhere with the factory bolts. Then with the ARP studs the problem I was having was the lube was getting under the cap and not letting things bottom all the way out. I had to mix and match the slightly oversized bearings as I had the crank machined, but I was able to get everything right to 0.0020. Caps 1-4 & 7 started at 0.0025 and then caps five and six were way up to 0.0031. The 0.0026 oversized set just in the upper half, and then in both halves on five and six put everything in spec. On the rod caps I had to use the same oversized set just on the upper half across all six. The rod bolt stretch gauge from summit racing was pretty good. It fit in real nice.
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Thanks...its all on a long, slow burn. That probably good though as my ADD would get me sidetracked if I had lots of uninterrupted time to to work on the X5 and this motor.
Is the B58 going into your X5? I think that is the motor in my wifes x5 50e. Love the straight sixes...so smooth and linear with the power, and man that thing has tons of power. An e53 with one in it would be a monster!
I'm very happy I looks like I won't have to get my crank machined, which would lead to having to fool with different size bearing shells from the OE ones. It is interesting to me that BMW doesn't call for using a micrometer on the journals, only plastiguage. Plastigauge seems far from an exact science to me, which would seem to indicate there is some decent wiggle room in the bearing specs.
I did find an important note in TIS for the M62 that requires all new con-rod shells if you change your main bearing shells. Ugh. Probably good insurance anyway, but it all adds up!