yamaha 3.0 l4 blew head gasket help!

[Flashcardsgo]

If the engine was over cooling you may get milk in the rocker covers simply because the oil doesnt get hot enough to boil out any moisture out and it condenses under the covers and thus the milk . Is your t/stat working ?

I’m not sure. The temp gauge on the dash Never gets hot stays pretty steady. Good oil pressure too. Just want to get rid of that milky in the oil and somehow add something to clean up pan . Then put fresh oil , filter and put her back together. May switch out head , lifters. Pushrods over the winter.

 

[Flashcardsgo]

Re check your compression numbers, new engines are only 150 psi, might be a bad gage.

It is a brand new gauge and I did it twice , my boat mechanic ( now retired) said that 180 was great so idk. I adjusted the valves got quieter and ran good but now I need to get that milk cleaned out of oil and engine somehow before I change the oil. I can’t even figure out how to change the oil because I can’t get to the pan bolt good enough to break it loose and I’ve tried to extract through dipstick but my brake bleeder pneumatic tool wouldn’t work nor a hand pump because hose too big to go in dipstick.

 

[Grub54891]

I adapt the hose for my vacuum bleeder to fit the outside of the tube, mine fits tight to the tube so I don’t need to clamp it. The tube goes to the bottom of the pan on a mercruiser, I’m not sure on a yamaha but I would think it would. Warm oil works best for extraction.

 

[kd4pbs]

Polyethylene tube snaked inside the dipstick to the bottom of the oil pan. Suck it with whatever you have that sucks (besides the Yamaha outdrive )

 

[Mc Tool]

. The temp gauge on the dash Never gets hot stays pretty steady. .

Well there you go . I think you need to get another means of measuring engine to verify temp gauge is working and to test engine temp