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Top end

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versuspop
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Location: columbus, ohio

Top end

Post by versuspop » Tue Aug 09, 2011 6:11 pm

So I am confused. If I replace valves etc, how do I get the camshaft positioned back to tdc ? I have the engine apart to replace pistons and rings, but I am considering new valves too. What other work is recommended for the top end? Isn't there something with the seats that I should do also?
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LOUD MOUSE
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Re: Top end

Post by LOUD MOUSE » Tue Aug 09, 2011 7:43 pm

If ya replace the valves ya will for sure need to cut new seats.
In my experience Head/Valve work isn't for a garage mechanic. ............lm


versuspop wrote:So I am confused. If I replace valves etc, how do I get the camshaft positioned back to tdc ? I have the engine apart to replace pistons and rings, but I am considering new valves too. What other work is recommended for the top end? Isn't there something with the seats that I should do also?

versuspop
honda305.com Member
Posts: 205
Joined: Thu May 07, 2009 9:06 am
Location: columbus, ohio

Post by versuspop » Tue Aug 09, 2011 8:49 pm

Good to know. For reference, are there markers on the cam to know that it is in tdc position?
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LOUD MOUSE
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Joined: Mon Aug 15, 2005 8:23 am
Location: KERRVILLE, TEXAS

Post by LOUD MOUSE » Tue Aug 09, 2011 9:31 pm

On the right side of the cam sprocket ya will see a dot or zero that is the top to have the cam at when ya install the cam chain. ............lm

versuspop wrote:Good to know. For reference, are there markers on the cam to know that it is in tdc position?

versuspop
honda305.com Member
Posts: 205
Joined: Thu May 07, 2009 9:06 am
Location: columbus, ohio

Post by versuspop » Tue Aug 09, 2011 10:34 pm

Thanks Ed.
65 CA77
66 CB77
71 CB450
73 CB350F

versuspop
honda305.com Member
Posts: 205
Joined: Thu May 07, 2009 9:06 am
Location: columbus, ohio

Post by versuspop » Wed Aug 10, 2011 8:55 am

is there a way to check the valves (and how well they close) with the top end apart? I read something in another post about kerosene and seepage, but did not understand.

Ed- are you still doing any work on top end/ valve stuff? :)
65 CA77
66 CB77
71 CB450
73 CB350F

LOUD MOUSE
honda305.com Member
Posts: 7817
Joined: Mon Aug 15, 2005 8:23 am
Location: KERRVILLE, TEXAS

Post by LOUD MOUSE » Wed Aug 10, 2011 10:08 am

Install plug, valves closed, fill to Over Valve surface (I use acetone as it evaporates quickly), look into intake/exhaust ports for sign of leak. ...........lm

versuspop wrote:is there a way to check the valves (and how well they close) with the top end apart? I read something in another post about kerosene and seepage, but did not understand.

Ed- are you still doing any work on top end/ valve stuff? :)

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