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From the way the oil flows in the system it would be pretty hard to introduce something . all of the oil that goes to feed the engine is filtered through the oil filter first .
I have not idea what would cause this. It looks like a hand grenade went off in there. There could be so much damage I would just buy a take out motor vs rebuilding that pile. Maybe it is saveable but it is big bucks even for a DIY'ER like me who has rebuilt many Ferrari motors among others. I have never seen a motor this bad before. Any idea as to where the carnage started? Oil may be just a coincidence. My guess would be that this motor was ready to blow before the oil change. Even 0 weight oils are like 10wt base stocks and offer quite a bit of protection. Fparkere has a point about using weights recommended by Ferrari. I don't see any reason to not follow their guidelines. But a 0-40w is a fine substitute for a 10-40w in fact wider range if the 360 was supposed to us a 10-40. I ran 10-40 and 0-40 and 10-30 in my race 348 just fine.
A very smart and experienced mechanic can figure it out. They do this kind of detective work often. I am sure quite a few guys here are chompin at the bit to be the one who figures it out. So..... What filter did you put on when you changed the oil?
Things were made a hell of a lot worse by the fact that the motor kept running for a few seconds after this happened . I had a sudden loss of power and then about 30 seconds later it was over . I used the factory filter . Looks slot worse in et pictures . I just ordered two new pistons , cylinders and con rods form Daniel . The heads are on there way to Oregon to be rebuilt . everything else looks like its in great shape , the damage was mainly to those two cylinders . All the other vales are fine and pistons and liners are good so far .
Really sorry this happened to you Bill. Please continue to post anything else you learn about the failure. Best of luck getting everything taken care of.
The good things is i got to look at my kevlar clutch . looks just like the day i put it in . you can still see the machine marks on the flywheel .
This looks like full thickness bearing loss and is typical of cavitation. If it is cavitation, this type of damage can be caused by starting up the engine and immediately revving it up to high RPM. This can occur at room temperature but is worse as the temperature drops. Also, oil starvation can occur by starting it up and instantly revving it, worsened by long periods of non use before stepping on the gas so fast. All this assumes there was no particles in there blocking circulation or small enough to get into the bearing then scrape it. What do all the other bearings look like? One has to consider a manufacturing defect as well. aehaas
Jeeez, that looks frightening! I wouldn't quite go down the "blame Mobil 1" route until a full post mortem has been done.....time to call in Quincy! I've used Mobil 1 in all it's incarnations since in was introduced in the UK sometime around 1984 and have never had an engine related problem. Sad to hear your story, let's hope you get it sorted asap.
Sorry to hear about the engine failure. I don't think this damage was caused by Mobil 1 ow40 and will continue to use this in my 355. Last time I came across this type of damage in an engine tear down/rebuild I found that the oil filter had failed (collapsed internally). I know there is a bypass in most filters but for what ever reason it was not enough. I have also seen a boxer 12 cylinder engine failure that was caused by an excess of silicone used by the prior technician.....when the excess silicone broke away it plugged the oil galleries and seized the top end.
Bill, Looks like fun... not trying to be funny/sadistic, I love detective work. I've looked at a few cases of spun rod bearings and I think that's where you should start your search. You mentioned the damage was in cylinders 1 and 8, and iirc they share the same crank journal. I could see where one bearing could fail and leave the other one intact if it were a material failure or detonation in that one cylinder. What you have there looks like a failure to lubricate that journal. and as a result took out both rod bearings. The damage to the valves happens as the bearing material goes away and it allows the piston to travel further in the bores due to the missing bearing material. It sounds like you are going to simply repair those holes and then put it all back together. Which is most likely all you're gonna need to do. I'm assuming you are gonna dissameble the rest of the engine to get all of the oil passeges cleaned out (especially the crank passages). And I'm sure you already know this but do not forget to have the coolers and all of the oil lines cleaned before it all goes back together..... now if remember correctly didn't you just do something with painting or something (welding) to your oil tank???? Could you have left some contaminate in the oil tank or whatever you welded the fitting to? Good luck, Michael
Powdercoating requires the use of a fine sand media-blaster to clean parts and some could possibly have been accidently left in the oil separator that was powdercoated. Which is also why cylinder blocks shouldn't be blasted. Just a guess.
Looks like a dumpster full of former engine parts there. You have way more than 2 holes to fix. As previously mentioned you need to absolutely clean or replace every bit of every oil passage. What is the crap covering the oil pickups? Why did you send the cylinder heads to Oregon? I'm in Minnesota, there's a great head shop right down the street from me. There isn't anyone near you that can do valve work? It's possible that there was debris left in the oil separator after powdercoating that plugged things up. http://www.ferrarichat.com/forum/showthread.php?t=138944
piston looks like it has detonation damage, but that may have been an after effect of the proposed rod bolt failure.
I didnt have anything power coated after welding the new fitting on the oil separator and oil cooler . I just touched it up with a spray can . The parts were surgically clean when done . I have access to some big ultrasonic cleaners . Everything was the flushed with solvent . There was nothing left in there . I do believe that since number one and eight cylinder is in the last run of the system i think it was simply starved for oil do to the viscosity being like water . the oil pup only pumps so much oil and if the viscosity is low enough it will simply push more out of the other holes . Not the best way to explain it but you get the idea . I had a nice chat with a very respected Ferrari mechanic tonight and he believes the same thing i do regarding this . Its simple , do you really want to take a chance of this happing to you engine or are you willing to gamble on 0 weight oil ? The stuff on the oil pickup is the bearing material .. Even if there was foreign matter in the oil it pretty hard to get into the oil passages to block them . Have you seen the size of the oil passages in the 360 crank . They aren't small . How in the hell would something this big get through the oil filter and the clog the oil passage . Not to likely with the way the system is designed .
Jay you asked, How does the conn rod mating face get tore up? If you have taken other engines apart at the rod bearings most rods are like this.. The factory scores lines and breaks the rods so that when they go together they fit perfectly and are stronger. Most rod bearing caps I have seen from factory car are like this. First one I did I said WTFH is this.. It also makes swapping rod caps impossible either with other rods or putting it on backwards. Bill, sorry for you damage. Its amazing the valves are so close that a .050 thick rod bearing will cause the piston to hit the valve. Do you think possibly that the valve hit the piston first thus causing the bearing to fail/explode due to impact between piston top and the valves? Maybe this was a valve failure first which wiped out the bearing.. Maybe something was sucked into the intake became lodged between the valve and seat and caused the valve not to shut. Then the piston could have hit the valve and the 2 weak links are the bearings and the valves.. Ive seen a lot of rod bearings go bad but usually they don't make the piston hit the valves maybe Ferrari used very tight piston-valve clearance. BTW, that was not detonation damage on the piston, it was pieced of the valve or maybe even a piece of the spark plug being beat into the piston while it was trapped in the cylinder. Detonation melts the piston and does not dent it.
The more I look at it the more I think for sure it was a foreign material in the cylinder that caused all of the problem. The bearing was destroyed when the piece of piston at the top (look at the pic of the piston with the piece missing) broke and started slapping around in there. I would bet good money that the rod is bent also. Something happened at the top and it took out the bottom. Either a valve stuck, spring failed, spark plug tip broke etc.. I dont think oil would be the culprit here.
In nearly 40 years working on engines I have NEVER seen a connecting rod with a broken face (that didn't break violently). Show an example of this please. I didn't see any sign of valve failure. Some small foreign object damage to the combustion chamber but mostly intact. Please explain how a bearing "explodes" and how a valve touching a piston top can cause this. I'm speculating that the top ring land broke away and the pieces got in the way and caused the damage.
