Yes there is rubbing on the outer surface
once my (former...) mechanic wanted to convince me that my car worked well "it's just due to the modern fuel without lead... the car is old and you compare it with a modern car so you are wrong: it works well!". A speech like that means it's time to change mechanic.... I redid (in another place...) the carbs and the spark timer and everything worked well, then. Once, in 2006, my Rover 75 (with the BMW 4 cyl diesel engine) started to do a very small whipping noise while driving just after the belt change (20 miles after changeing, the belt, more or less). I stopped the car roadside, opened the engine lid with the engine running and saw a ripped piece of the belt hitting the plastic belt cover. I stopped the engine, called the shop that the day before did the belt change and they told me this "sir, please stop the engine, don't start the car and wait for the rescue truck we will immediatley send there to take you and the car. Don't worry we will pay everything: we are sorry, it's our mistake". After half an hour there was the rescue truck and after two days they gave me back my car with another belt installed: that time perfectly worked. That was a very serious mechanic that did a mistake (it happens, sometimes, worldwide) and didn't try to tell me stupid things to cover a mistake. So, don't let him say stupid things, just ask him to fix the damage at his expense and nothing more nor less. As 2NA says, probably the damage is just one bank and even not all. It's much labor (but he will do, he doesn't pay his labor...) and some material (and he will pay). Inspect the engine with him with the bank head removed and look for damage on all four the slivers and pistons. I don't know as I'm not a mechanic (here maybe 2NA knows much better) if he can change just the damaged pistons or if he has to change them all due to different weight pistons that will make the engine turn bad: at least ask the mechanic to use the OEM pistons with the same weight. Talk with him of this problem and discuss the solution in advance ciao
All depends on how hard the valves hit. Ive seen valves hit pistons and the piston was damaged badly and had to be replaced. All depends on how many revolutions were made before the clutch was depressed.
so the damage could be just some valves? Almost no material cost then, just labor. I believed that an untimed valve could impact against an aluminium piston and damage it, and damage the sliver too. Doesn't this ever happen? My mechanic showed me some broken pistons in a BB due to a timing belt failure. As said, I'm not a mechanic. ciao
My 348 belt was not a clean break -- it was sheared when the timing gear fence broke -- but certainly a crap-ton (is that a word?) of valves met their demise. Even the ones that kinda look ok in the photo were tweaked measurably. Image Unavailable, Please Login Image Unavailable, Please Login
Unfortunately, at only 4000 rpm, it takes 0.03 sec. for the crankshaft to make two full revolutions and bend all valves if the camshafts are still turning at the wrong timing. If the belt snaps very suddenly, the first few valves to hit the pistons will stop the (by inertia) rotation of the camshafts and there will be a chance that some valves will not be bent. Things happen extremely quickly so I don't think pressing the clutch will make any difference.
my (just theory, not pratical, I'm not a mechanic) opinion is that everything depends from how hard is the first hit, and this depends basically from the RPM number when the belt fails. On a twin belt engine there is also the risk that the sound bank still pushes the pistons of the damaged bank, making the hits even harder. If you were driving at WOT, i think all the bank pistons were gone, but this is not probable so maybe the truth is in the mid. In any case the mechanic has to fix it. If the car were mine, I would ask to be there and look carefully at the pistons after the head removal ciao
Here's a picture of the timing belt http://www.ferrarichat.com/forum/attachment.php?attachmentid=2269924&stc=1&d=1469554092
This is the part that makes Ferrari ownership not worth it for many of us. Now if money is no object, no big deal, fix it right and fast so I can enjoy it. Time is my most valuable asset, it's not about money. Most of us don't live that way.
Ralph - sorry that this happened to you and I hope you can get it sorted relatively quickly without too much of an additional out of pocket expense.
For sure....Ralph make sure you are there when the engine heads come off and take pictures of every single thing.
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