Mel,
Even if the .060 overbore generates more heat, it may not be the problem.
Engines run hotter than the thermostat when heat generated by the engine is
greater than the cooling capacity of the system to shed heat. Since you have a
new radiator, lets assume it works adequately. The rate of cooling depends on
the difference in temperature between the water and the air. As the radiator heats up, it can shed
more heat and the system stops rising in temperature. The radiator depends on
air flow to carry away the heat and water flow to keep the radiator hot so it
has heat to give up to the air. If either airflow or water flow is low, heat is
not being shed at the maximum rate.
Is the fan blade close to the radiator?
Has the thermostat been changed? Is it a 160F? Is it a high volume type?
Does the lower radiator hose collapse from the suction of the water
pump?
Can you visually see good water flow as the thermostat opens?
Dave Homstad
-----Original
Message-----
From: Forward Look Mopar
Discussion List [mailto:L-FORWARDLOOK@xxxxxxxxxxxxx]On Behalf Of Mopar Mel
Sent: Friday, June 20, 2008 10:51
AM
To: L-FORWARDLOOK@xxxxxxxxxxxxx
Subject: Re: [FWDLK] 413
overheating problems. help;;;
Has anybody bored a
413 to .060 and had problems with overheating.. Im starting the think that
since Ive checked out 90% of the ideas people have emailed me that maybe .060
is too far making it too thin and thus cause overheating..Im almost at wits end
trying to figure it out… I, not aware of any head gaskets out there on
the market that left out a cooling hole since the heads are all the same as
holes in them.. anyway, that’s what I think.. since the block has been boiled
out, it ran cool be for the rebuilding and the only change I really made is the
bore of .060 and changing to 440 heads, is really should cool… like I said,
maybe too thin??
mel
From: Jim Pristelski
[mailto:ajp002@xxxxxxxxx]
Sent: Friday, June 20, 2008 11:43
AM
To: Mopar Mel
Subject: Re: [FWDLK] 413
overheating problems. help;;;
Mel,
I had a
similar problem with a 1975 440 engine. I pulled the heads off for valve
work. After I reinstalled the heads, the engine always ran
hot.
The
conclusion that I came to is that the head gasket did not have holes in the
proper position to provide antifreeze into the heads, or I installed the
gaskets backwards to achieve the same effect. But I traded the car
off before I had the time to tear it back apart.
Jim
On Fri, Jun
20, 2008 at 9:19 AM, Mopar Mel <mel@xxxxxxxxxxxx>
wrote:
I see I had a typo… its
not .030, its .060 that the engine is bored..
From: Forward Look Mopar Discussion List [mailto:L-FORWARDLOOK@xxxxxxxxxxxxx]
On Behalf Of L-FORWARDLOOK
automatic digest system
Sent: Thursday, June 19, 2008
11:00 PM
To: L-FORWARDLOOK@xxxxxxxxxxxxx
Subject: L-FORWARDLOOK Digest - 18
Jun 2008 to 19 Jun 2008 (#2008-165)
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