Engine hole
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wrote on 5 Dec 2019, 19:25 last edited by
Is it normal to have hole under my engine sized like small fingernail head. where the engine halfs meet?
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wrote on 5 Dec 2019, 20:09 last edited by
Yes that's normal
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wrote on 5 Dec 2019, 22:04 last edited by
Why it is there?
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wrote on 14 May 2020, 18:48 last edited by
Sorry to rehash an old thread, but it’s a good question. It’s the first thing I wondered on when I first got my dt.
It’s an air expansion hole. There is a sizeable enough air void inside that is opposite where the hot coolant goes to the water pump. If it was closed the air would expand, into the crank or outwards if the crankcase seal failed...
I only worked it out when I split the cases... -
Sorry to rehash an old thread, but it’s a good question. It’s the first thing I wondered on when I first got my dt.
It’s an air expansion hole. There is a sizeable enough air void inside that is opposite where the hot coolant goes to the water pump. If it was closed the air would expand, into the crank or outwards if the crankcase seal failed...
I only worked it out when I split the cases...wrote on 14 May 2020, 20:48 last edited by@SpookDog said in Engine hole:
Sorry to rehash an old thread, but it’s a good question. It’s the first thing I wondered on when I first got my dt.
It’s an air expansion hole. There is a sizeable enough air void inside that is opposite where the hot coolant goes to the water pump. If it was closed the air would expand, into the crank or outwards if the crankcase seal failed...
I only worked it out when I split the cases...I’m so glad someone else did this
The exact same thing happened to me, one week in of ownership, cleaning the bike and inspecting underneath and then boom. A little hole had appeared in my crankcase and I certainly hadn’t been doing any enduro, confused the absolute life out of -
@SpookDog said in Engine hole:
Sorry to rehash an old thread, but it’s a good question. It’s the first thing I wondered on when I first got my dt.
It’s an air expansion hole. There is a sizeable enough air void inside that is opposite where the hot coolant goes to the water pump. If it was closed the air would expand, into the crank or outwards if the crankcase seal failed...
I only worked it out when I split the cases...I’m so glad someone else did this
The exact same thing happened to me, one week in of ownership, cleaning the bike and inspecting underneath and then boom. A little hole had appeared in my crankcase and I certainly hadn’t been doing any enduro, confused the absolute life out ofwrote on 14 May 2020, 20:56 last edited by@Stevie-Wonder same with me lol
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wrote on 15 May 2020, 09:46 last edited by
Someone at Yamaha put it there for a laugh so people for years would ask whats this hole for?
