Author Topic: Burning oil?? (Read 6237 times)

Alpine003 · « **Reply #15 on:** May 14, 2007, 04:07:51 PM »

Quote from: badboypolar;25708

So the mains, rod, and head bolts where all out of whack.

I also what looks like abnormal wear on the pistons. The sides of them (facing how the crank turns) has some wear on them. I'll post pics of them when I get home.

So I'll wash out the cylinders and pistons, do a thread cleaner and try it again. This time though I'm using ARP head studs (ARP-201-4601 is the part number). FYI that summit has them for $140.39.

:eek: So you had the intention of rebuilding the motor but it might be worse than before?

Also, ARP studs are only worth it if you're planning on high hp motor build. Overkill on a stock motor imo. I would do a OEM Febi-Bilstein headbolt set for $14 and call it a day.

badboypolar · « **Reply #16 on:** May 14, 2007, 04:30:44 PM »

Here's the "abnormal" wear on the pistons. There is also some concerning wear on the rod bearing. I will pull the crank later this week and check the main bearings.

badboypolar · « **Reply #17 on:** May 14, 2007, 08:42:48 PM »

Pics added

mbtech0 · « **Reply #18 on:** May 14, 2007, 09:10:49 PM »

Good pics! The sides of the pistons look scuffed, and that concerns me, but the rod bearing looks like a "dry" start. Bearing need a smear, just a dab of Lubriplate when assembling, enough to lube for 30 seconds, and then wash out. You can tell I'm from the old school......Perhaps the failed torque wrench has something to do with this. Not enough/too much torque can upset things. I'm wondering how the piston pins went in, anything unusual? Did you have a bit of piston slap on a cold start, and did it go away in less than a minute?

badboypolar · « **Reply #19 on:** May 14, 2007, 09:54:22 PM »

I put on plenty of assembly lube on everything. No piston slap. Pistons went in fine. I had a little trouble getting it started and running because of fuel and the timing chain went off by one tooth, which would explain the dry start, It didn't really get running until a couple of times.

shutter · « **Reply #20 on:** May 15, 2007, 12:55:07 PM »

How do the bores look and feel?

badboypolar · « **Reply #21 on:** May 15, 2007, 01:01:44 PM »

The bores look and feel fine.

However after taking some measurements it seems that piston 1 is .08mm out of round. TIS says that .01mm is out of round. That doesn't give alot of room.

north/south 83.77; east/west 83.69

BTW these are MaxSil pistons from Bavarian Engine Exchange.

shutter · « **Reply #22 on:** May 15, 2007, 02:09:13 PM »

hmmm, the piston is pretty out of round for a .01 tolerance. At first I thought that maybe you got some wiggle from the bad torque wrench, but now it sounds like that one piston is way out your tolerance range. Even if .01 is a tad low, .08 is definitely too much?

shutter · « **Reply #23 on:** May 15, 2007, 03:24:54 PM »

oh yeah, are the other 3 ok in tolerance? Were they similarly worn?