I have a 3.5L Honday Odyssey engine that I purchased from JDH with supposidly 65K maximum miles. The engine is out of the vehicle and I removed the valve covers to adjust the valves. I found exactly the same as you found in your Pay if Forward video series – the rear head closest to the firewall was all gunked up, yet the front head was fairly clean. Since the engine is out of the vehicle, what would you recommend? Should I remove the head and clean in a parts washer? Should I try to clean in place on the engine taking care to remove the gunk and not let it pass through any passages? If I use a solvent-based cleaner do I need to replace the cam shaft seal? What would you do? thank you. Craig
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