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Re: Head Coolant Passages

To: 6pack@autox.team.net
Subject: Re: Head Coolant Passages
From: Timothy Holbrook <tjh173@yahoo.com>
Date: Mon, 12 May 2003 16:31:25 -0700 (PDT)
Dave,

This is normal.  My car is the same way.  I believe it's because these
heads were used on a variety of blocks that had different water
jackets.  The fact that your coolant passages from the head "dead end"
into the block is not a problem, and will not cause the head gasket to
blow.

Tim Holbrook
1971 TR6


--- Dave Mahlmeister <dmahlmeister@peoplepc.com> wrote:
> Hi everyone, 
> I really need some help on this one.  I pulled my head
> yesterday to replace a blown head gasket. (Long story.
> My engine had overheated and I had steam coming up
> through my head bolts and exhaust.)  When I started
> cleaning up the head and fitting a new gasket I noticed
> that the gasket matched all the coolant openings on the
> block hole for hole.  On the head it was a different
> story.  There were more openings in the head for
> coolant to feed through then in the block.  On the carb
> side of the head there is a hole between each cylinder
> for coolant and on the dizy side there is a hole
> between the 2/3 cylinder and between the 4/5 cylinder. 
> That's a total of 8 holes.  On the block I only have 2
> holes between the cylinders and they are on the carb
> side between the 2/3 and 4/5 cylinders.  It's no wonder
> that the gasket blew. Both head and block match for the
> large openings in the front and back.  So there are 5
> holes in the head that just "dead end" at the block. To
> give you some background I rebuilt the engine several
> years ago and noticed that someone else had been in
> there.  I know the engine is not original to the car
> which is a 72 and I suspect that the head is not
> original to the engine either.  When I did the rebuild
> I never noticed the disparity.  So my question is what
> do I do?  Can I go to a machine shop and have them plug
> the extra holes or look for a new head or should I not
> be concerned.  Has anyone else noticed this as well?
> 
> Dave Mahlmeister
> 72 Tr6
> 
> ________________________________________________
> PeoplePC:  It's for people. And it's just smart. 
> http://www.peoplepc.com 


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