What does the cylinder head check valve do?
 

Doing a head gasket and one of the things I was told I need to do is replace the o ‘ ring on the check valve. Trouble is, even with a big slotted screw driver won’t budge. Even soaked with PB Blaster (probably not a good idea to put Blaster on rubber).

No budge. Once I get the head back on the valve is hidden forever, rather fix it now but I’m stuck.

Thanks.




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It brings oil to the cams/buckts, and keeps it there for startups. If you have the head out... replace the o-ring.

https://forum.e46fanatics.com/attach...1&d=1335718356

Thanks. Finally muscled it out, cleaned it up, tested the movement, new o’ring, back home it goes. Thanks


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What does the cylinder head check valve do?
 

On the M62 to remove is thread an M10 bolt in. I don't think it's threaded but it will bite enough to give you a good grip to wiggle side to side and pull it out. (you can install that way also). This one looks like it's threaded in yikes. I'd use an impact tool to break it free.


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