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Old 12-04-2012, 02:17 PM
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DSXMachina DSXMachina is offline
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Location: New Hampshire
Join Date: Dec 2007
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Originally Posted by ctuna View Post
Running techron on a DI car won't help as no fuel passes over the valves.
Past time for the Walnut Blast.

The DI cars have a design flaw the causes carbon build up over the valves.
No fuel passes over the valves. This is not unique to BMW.

I have a feeling that figure is off by an order of magnitude.
10.4 million miles???
For anyone who might not know, the valve is at the bottom end of that 'stem' you see coming down from the top. Only a portion of it is visible. The worst accretion is on the intake roof where the valve stem enters the cylinder head. The pic would have been taken after the intake manifold was removed. If a borescope is available you can see the same area without removing the intake manifold.

Last edited by DSXMachina; 12-04-2012 at 02:23 PM.
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