Author Topic: Head question  (Read 1472 times)

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Offline dropzone

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Head question
« on: April 05, 2014, 09:18:07 AM »
Is there any difference in the CH20 and CV20 heads? It's a CH20S Spec 64510 S/N 3319007311 The engine has a bad valve guide. Also will say a CH25 Head work on this motor?



Offline TinRabbit

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Re: Head question
« Reply #1 on: April 05, 2014, 07:47:44 PM »
Heads for horizontal engines have oil return passage on the intake side while the vertical heads have the oil passage on the exhaust side. You can easily drill out the passage to make one work on the other.
Other than that they are same head, same valve sizes, springs. Now the 25/26/27/28/29hp versions have larger combustion chamber which will drop comp ratio on the smaller cc engines like the 16/18/19/20/22/23 if popped on.
Litterbox Engine
Kyle

Offline dropzone

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Re: Head question
« Reply #2 on: April 05, 2014, 08:23:33 PM »
Hey thanks Tinrabbit!


Offline leadslead

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Re: Head question
« Reply #3 on: April 26, 2014, 06:04:49 PM »
Can u shave the kohler heads like b&s heads or is Thier a clearence issue Thier already shallow ... Don't have a cam yet to check
STEVE HENDERSON

Offline rotten ron

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Re: Head question
« Reply #4 on: May 04, 2014, 07:24:53 PM »
You could fill the chambers with weld and reshape them then you only have the machine them enough to make them flat,when you get a much higher compression ratio it will blow the head gaskets,then it will need to be " O " ringed and use copper head gaskets

Offline leadslead

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Re: Head question
« Reply #5 on: May 05, 2014, 04:42:12 AM »
Thanx
STEVE HENDERSON

 

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