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 Question about holes in cylinder head

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Omnis
Grignapoco
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PostSubject: Question about holes in cylinder head   Sat Jun 23, 2018 10:35 am

Question on 2012 Griso8V Tenni:
It looks as if I have a bit of a leak on the left cylinder head, on close inspection I found two, I believe, vent holes the upper one appears open as I was able to insert a small hex key pretty much all the way in (~2.5"). I would have expected it to gush out oil but it doesn't.
The lower hole under a fin, difficult to see in, is the one that appears to leak.
Should either or both be plugged?
Many thanks

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This is the upper hole


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This is the lower hole
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Omnis
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PostSubject: Re: Question about holes in cylinder head   Sat Jun 23, 2018 10:43 am

BTW same issue on the right cylinder : lower hole is leaking a bit, the upper one is bone dry.
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Pete Roper
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PostSubject: Re: Question about holes in cylinder head   Sat Jun 23, 2018 1:05 pm

Upper one is the water drain from the plug well. I'll have to go have a Squizzy at one of the spare heads at work out where the other one goes.
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PostSubject: Re: Question about holes in cylinder head   Sun Jun 24, 2018 6:52 am

Thanks Pete
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PostSubject: Re: Question about holes in cylinder head   Tue Jun 26, 2018 6:34 am

Hey Pete any thought as to what that second vent hole is for? I’d like to plug it or have it sorted before my long trip this summer. Many thanks.
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Pete Roper
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PostSubject: Re: Question about holes in cylinder head   Tue Jun 26, 2018 12:10 pm

Sorry, I've been running around like a chook with its head cut off getting organised to fly out to Canada on Friday morning and it slipped my mind. I'll try and have a Squizzy this morning.

Pete
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PostSubject: Re: Question about holes in cylinder head   Tue Jun 26, 2018 3:29 pm

Whereabouts in Canada are you going to be?
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Pete Roper
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PostSubject: Re: Question about holes in cylinder head   Tue Jun 26, 2018 4:00 pm

We're doing the trans-Canada with side trips west to east then spending some time on the eastern seaboard of the continent before heading back NW from West Virginia/North Carolina via Indiana, Chicago and the Dakotas before heading north of the border again and meeting our daughter who is coming over to Vancouver for a conference and spending some time with her in BC.

Pete
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PostSubject: Re: Question about holes in cylinder head   Tue Jun 26, 2018 5:47 pm

Let me know if you’re going to be in Halifax, Nova Scotia, on the Atlantic coast. P.msg me.
Luca
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PostSubject: Re: Question about holes in cylinder head   Thu Jun 28, 2018 7:22 am

With Mr. Roper on vacation anybody else want to hazard a guess as to the use of the lower hole in the cylinder heads (see pics above). As I mentioned they seem to seep oil and I would like to plug them with JBWeld if appropriate. comments or feedback greatly appreciated.
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Pete Roper
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PostSubject: Re: Question about holes in cylinder head   Thu Jun 28, 2018 11:59 am

Sorry, I was run off my feet before I left, (In Sydney now.) I think that is just a secondary drain. I'd be replacing the plug tube o-rings as a first step.

Pete
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Grisonut
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PostSubject: Re: Question about holes in cylinder head   Thu Jun 28, 2018 4:57 pm

Pete Roper wrote:
We're doing the trans-Canada with side trips west to east then spending some time on the eastern seaboard of the continent before heading back NW from West Virginia/North Carolina via Indiana, Chicago and the Dakotas before heading north of the border again and meeting our daughter who is coming over to Vancouver for a conference and spending some time with her in BC.

Pete

Damn, I just came back from West Virginia last week...
Put about 1600 miles in that State, nothing but twisties! Hell yeahhh!!!
GRiSO loves WV. lol
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PostSubject: Re: Question about holes in cylinder head   Thu Jun 28, 2018 5:17 pm

OK thanks Pete.
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