To BK44 or Not

[Bloody run]

After watching Flabberdoopin lattest video on under valve Gunk, yes or NO , would BK44 in gas tank cleaner clean GUNK behind the valves on a ranger raptor with 4,000 miles on it , preventative maintenance thing?

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[Sharpie223]

If it goes in the gas tank it will do almost nothing to clean intake valves in a direct injection only engine. If you really want to clean them in use, I would look to water injection. At 4k miles I would almost guarantee you do not have a problem, and even at 100k miles you may not. It's probably not a problem even worth exploring unless you notice less power. A lot of modern DI engines are designed to heat the valves enough to burn off gunk build up.

 

[Bloody run]

Thanks

 

[some_guy]

i would install a catch can as a preventative measure, no need to spend the $700 for the Ford one on the website, but something.

Secondly, since it is direct injection, meaning the injectors are in the cylinders and not port injection which would be upstream of the valves, a fuel detergent wouldnt help.

as far as other preventative maintenance, i really dont know. direct injection isnt all its cracked up to be IMO, but only after years of data does anyone realize it.

Manufacturers now are going with both port and direct injection to counter this issue. unfortunately the RR doesnt have it, only direct injection.

 

[Sharpie223]

...
direct injection isnt all its cracked up to be IMO, but only after years of data does anyone realize it.
...

It matters less at low loads but it is an excellent tool for combustion timing, especially beneficial in high compression or forced induction engines, most new engines are one or the other. It lets you add fuel well after the intake valve is closed, and add fuel during the spark. This in turn allows a more controlled burn rate at high compression (including boost here) that would cause port injection to knock.

 

[some_guy]

It matters less at low loads but it is an excellent tool for combustion timing, especially beneficial in high compression or forced induction engines, most new engines are one or the other. It lets you add fuel well after the intake valve is closed, and add fuel during the spark. This in turn allows a more controlled burn rate at high compression (including boost here) that would cause port injection to knock.

I agree with all of that but it's kind of a moot point when the engine needs an head/valve removal service under 100k miles. It's a flawed design.

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