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  1. Min06Max

    Carbon Fouling, Exhaust valve stems

    I've received several recommendations concerning the water injection method to clean up my hanging exhaust valve(s). You’re suggestion about the dyno was the best. I will look for more details…if anyone has any incite…please write again…obviously this makes me just a little nervous…but I’m...
  2. Min06Max

    Carbon Fouling, Exhaust valve stems

    Thank you for the reply. Information I've been receiving seems to indicate that this 4.6 engine is notorious for exhaust valve problems if an owner uses ANY thing except GOOD premium gas. Certainly once a valve begins sticking the opportunity for additional carbon build-up and general...
  3. Min06Max

    Carbon Fouling, Exhaust valve stems

    Friends...Thank you for the quick replies. The vehicle in question is a 1998 Range Rover 4.6HSE(P38) just turning 100K.This seems to be a common problem with this engine...I was hoping for an additive that would loose the carbon that apparently is binding some of the exhaust valve and giving me...
  4. Min06Max

    Carbon Fouling, Exhaust valve stems

    Are there any miracle elixirs that will eventually remove carbon from an exhaust valve stem and prevent and further build up?
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