Valve Specs Anyone?
#1
Valve Specs Anyone?
Well my MCS started misfiring last week on #1 which led down a long path of determining the problem. After checking/replacing all of the obvious ignition/fuel items the problem still persisted. The engine was firing on all cylinders as proved by removing a plug wire and having the idle worsen, but something still wasn't right. This led to a compression test and finally a leak-down test. With #1 @ TDC air was leaking past the exhaust valves. The head is currently off and disassembled, and the problem seems to be pitted exhaust valves that were holding carbon deposits preventing the valves from completely closing. I'm currently in the process of lapping the valves, but I don't know if they are too far gone to save.
That brings me to a request from NAM members. Could someone give me the valve specs from the Bentley manual? A picture or a scan would be great. I need to get this head back together ASAP, and I don't have time/money to wait for the Bentley manual to ship. If anyone could help I would be most appreciative.
Thanks,
Josh
That brings me to a request from NAM members. Could someone give me the valve specs from the Bentley manual? A picture or a scan would be great. I need to get this head back together ASAP, and I don't have time/money to wait for the Bentley manual to ship. If anyone could help I would be most appreciative.
Thanks,
Josh
#3
This is what I'm looking for:
http://www.kmotion.biz/images/Installed.jpg
Thanks again for the help,
Josh
#5
These are the most detailed specs I have found. The Bentley includes very little on engine internals.
http://www.bmw-planet.com/lib/mini/ENGINE%20TECH.pdf
http://www.bmw-planet.com/lib/mini/ENGINE%20TECH.pdf
#7
Did you ever figure out what the stock distance of the exhaust valve should be? From the tip of the valve to the spring perch area or top of the stock valve guide? I'm also installing new valves. I can see the new ones are a wee tad shorter than the original pitted valves. Which makes sense if the old original valve moved "up" over time as the base wore out...
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