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head gasket water passages
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lonesome mopar
Posted 2018-05-27 8:44 AM (#564069)
Subject: head gasket water passages



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Location: Milano, Italy

Hi all!

I received these very good head gaskets (one side metal towards the block)  for my 318 Poly  from Fel-pro, (courtesy of Rockauto)  but the water passages in the gasket seem restricted.

And this is not the first time I encounter this feature. Other gaskets by other makers have the same peculiarity.

I am attaching a picture of the water passage on the block and on the head gasket.

Is there a reason why they restrict that particular passage ?

Or I'd better enlarge it to match the block?

 

 



Edited by lonesome mopar 2018-05-27 8:56 AM




(gasket water passages.jpg)



Attachments
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Attachments gasket water passages.jpg (205KB - 14 downloads)
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wayfarer
Posted 2018-05-27 10:09 AM (#564074 - in reply to #564069)
Subject: Re: head gasket water passages



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I would be more concerned about the restricted passages at the bottom which will be closer to the exhaust side of things....
Perhaps someone has an old oem gasket for comparison.
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57chizler
Posted 2018-05-27 2:32 PM (#564083 - in reply to #564069)
Subject: RE: head gasket water passages



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Many people call the top row of coolant holes "steam ports" i.e. not intended to flow large volumes of coolant, thus the gasket restricts the ports.

http://www.felpro.com/technical/tecblogs/head-gasket-coolant-holes....
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LostDeere59
Posted 2018-05-27 3:36 PM (#564091 - in reply to #564083)
Subject: RE: head gasket water passages



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Location: Hilltown, PA

Yep - this ^^^^^^

It may seem counter-intuitive but the holes in the headgasket are often smaller than the passages, to control coolant flow.

Remember - coolant can easily move through an engine TOO fast, preventing it from drawing the heat from the iron.


Gregg
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BigBlockMopar
Posted 2018-05-27 3:57 PM (#564092 - in reply to #564069)
Subject: Re: head gasket water passages



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That's a myth.

And, if you open up those gasket holes the water will probably take a 'shortcut' and hardly cool the rear cylinders.
Steam holes, I prefer to call those "air holes", because the coolant isn't hopefully boiling all the time.
Any trapped air has to find it's way to the radiator somehow.
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LostDeere59
Posted 2018-05-27 4:31 PM (#564095 - in reply to #564092)
Subject: Re: head gasket water passages



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Location: Hilltown, PA

I've been proven wrong before (and will be again) but I have to disagree.

Personal experience has shown me that you can have too much coolant flow.

Ever had an engine run hot because the thermostat was removed, yet installing one restores proper cooling?


Gregg
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lonesome mopar
Posted 2018-05-27 4:41 PM (#564096 - in reply to #564069)
Subject: Re: head gasket water passages



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Location: Milano, Italy
thanks a lot for the hint !
And for the link to the fel-pro page !

So I'd better not to touch the hole size and assemble the gaskets as it is.
Thanks again !!!!
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