Question about BMW 530i
I asked you already,and was told IF only timing chain broke,that valves&piston damage would happen but"please!!" let me know if possibly dual vanos were to go bad,that cam shafts would quit turning causing compression to be lost but there would be no valve/piston damage?. Thank you very much and have a Very Merry Christmas.
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Posted on Jan 02, 2017
Thank you for asking my assistance. I will try my best to help you.
I have been in the Toyota biz for the last 14 years, and, unfortunatly, have not ever heard of this issue. That being said, I do have connections in the engineering dept at Toyota, and on Monday, I will call out to the west coast and inquire further for you.
Now, to the issue at hand: The shield that was bent down is secured very well to the underside of the valve cover. To bend that device, I can only guess that when the oil was being put into the engine via an oil pump, the nozzle of the pump was *** jammed *** down onto the shield, and broke it loose from the internal retainers under the valve cover, and contacted the cam; this is very possible...I agree with the statement that your SM provided, however, further engine damage? Removal of the oil pan would be in order, to determine if any more pieces are there. Doubt it, though.
And, to answer your last question, the responsibility of the cause for failure is your oil change guy.
He bent/broke the shield, and caused your problem. I hope this has helped, if you have any other comments or questions, please feel free to repost.
Posted on Oct 04, 2008
SOURCE: Timing Chain and Valves
I think it's an interference engine but you can check quite easily at this point if the valves are bent. Pull all the spark plugs out, turn the crank so that all the pistons are 1/2 way down their bore, get a piece of fuel line that is just the right size to thread into the plug holes or a special fitting for this purpose, and blow into each cylinder after you have turned the cams in succession so that the valves should be closed at the hole you are blowing into. If a valve is bent, you won't have any trouble blowing into the cylinder. If it's good, you won't be able to blow very well at all.
Posted on Mar 30, 2009
Either the camshaft are seriously out of time or the piston rings/pistons are worn out.
Check TDC of Piston No1 on the power stroke coincides with both inlet and exhaust valves being closed.
Posted on Oct 09, 2009
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