Quote:
Originally Posted by 5erman
So I got some interesting news from a service manager where I take my car in columbus. He said that they have gotten cars return like mine after doing this bleeding procedure. And he said he does not agree with doing the procedure and thinks it is damaging but has to follow bmw protocol in order to replace the head.
They hold your engine at 3500k for up to 15 minutes straight. They start with 3 min utes and replicate it 5 times. If the ticking is still there they do it for 15 minutes straight. He says that I most likely have a broken lifter due to this procedure. WTF. He is admitting to me however is making it seem like no big deal.
I am still waiting for them to take the head off and inspect the engine. I assume they got the head off today and are looking at everything. He said his master mechanic/shop foreman is working ont it so I hope it will be inspected well and they are legit. If they find a problem beyond the head I hope they would be honest.
I am in an ineresting position. My lease is actually up and was going to buy this car but now having serious serious second thoughts, obviousy. I am waiting to hear the final damage report before I decide. If it is bad the car goes back to them to deal with. I am lucky to be in this position.
Can you explain how a broken spring could cause that much damage downstreem>? Just curious thanks!
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I'm no mechanic but simply a car enthusiast. I'd like to think that doing
the bleeding procedure is not putting the car in harm's way. 3500 rpms
is nothing out of the ordinary even for 3 hours straight. I've done road
trips where my rpms were above 4000 for more than 2-3 hours. The only
issue with running a car like that is cooling it. When you drive the car,
the air cools down the radiator (as well as the fan). With the bleeding
procedure I'm sure they put a big fan in front of the car that blows air.
A broken spring may allow the valve to drop in the cylinder or not be in
the right position. If that's the case, then the piston as it travels, can
encounter the valve and that's not pretty. I've seen valves that simply
break from this to pistons that have the valves wedged on them.
There is no way for them to hide it since they will repair the car under
warranty and it simply wouldn't work right if they don't repair it right.
The computer itself would catch it and throw an error anyway.
If your car is a lease, and has a damaged spring then I would think
carefully before buying it if the damage is beyond the spring/lifter.
I think you got unlucky from the bleeding procedure if the spring broke.
But keep us updated on how this goes. Best of luck.