I plan on listing the flathead here. As for the BBC I figured those move best. I had a hell of a time finding mine. Seems there in high demand and running low on donor blocks.
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The above mentioned was bothering me. I didnt have much time, so I just wanted to do a few more checks on this today. I checked everything....exhaust tips(black), dipstick(clean oil), pan, though bottom of timing chain cover(clean oil), oil filter(clean oil), water jackets(clean water [remember boat...water pulled n thur outdrive, blown out exhaust]).
But the inside of valve covers is caked in this white crap. Reminds of white hand cleaner or crisco, with maybe a touch of brown tint. It's mainly sticking to the top/inside of the valve cover(more on right bank). Though some on the top of the rockers and some laying in the low points of the head(low stuff is milky). Plus a decent amount of rust all over. The rust is on the head and springs. More on the rear sides of head(6&8-5&7). But the most on the right bank, especially 5-7.
Which reminded me, the exhaust coming out this bank never seemed as strong as the opposite side. The exhaust tips have black rubber flappers to keep the water from coming back in. The exhaust tips sit above the waterline, but under the boats swim platform. The flapper on the left side bank(2-4-6-8) actually hits and marks the above swim platform. The right side(1-3-5-7) doesnt(or not much). This also follows the compression readings(2-4-6-8 reads higher).
I wonder if for whatever reason, I'm getting some serious condensation issues. The right side valve cover has a breather filter, where as the left cover is sent back to air filter. That might explain the rust and white stuff. If so, I wander if the rust is effecting the valves ability to seat.
I sprayed the valves, springs and heads with some lube oil. I tried to get as much of the rust out as I could. We'll see if the helps future tests....
sounds like condensation on cool down---engines need to get the oil hot enough to vaporize any moiseture in the oil and be vented good enough (pcv or such) to run the moisture thru with the combustable mixture to burn it and discharge it with the exhaust----
I agree. I've seen similar deposits in the rocker cover area on engines that see mostly short runs in the city, never getting a chance to fully warm and cook off moisture. Lubricants have similar molecular makeup with basic soaps, and can build creamy off-white gunk that needs to be vaporized.
That makes sense. The motor has never run long. Its obviously in an area where moisture is abundant. Plus it doesnt have a closed cooling system. It's constantly drawing in cool water and blowing the warm water back out the exhaust. So it stay cooler than most motors.
I noticed that.
The motor has a air breather on the right valve cover. Think for future motor, it should be switched to both lines back to flame arrestor? Or you think the air breather is better? The arrestor does have hookup for 2 lines. It's set up where the line off the left valve cover tees off in both arrestor hookups.