RE: [Chrysler300] The Head Gasket , or maybe a blocked core?

[christopher beilby <thelastbestgenius@xxxxxxxxxxx>]

Another thing to look at is to see if you radiator is not blocked by loose rust etc from the block.  Sometimes you can let some/enough water out of the core, by say loosening a lower hose clamp, so it reveals the top of the finned part of the inside of the radiator - looking down thru the radiuator cap hole - you should see all the little 'cuts', slots, that are the top ends of all the vertical rows that the water runs through so the fin that are attached to them can cool the passing water.

 

If your radiator is clean, no rust/scale, all these rows of slots should be clear, no stuff sitting at the top of them. If however many of them cannot be easily seen due to gunk/rust on top of them, then your water flow will be very poor and the motor will run hot.

Sometimes you can fix it somewhat by removing the radiator, and filling it totally up lying flat, then suddenly lift the bottom up vertical - the weight/rush of all the water in the core can sometimes dislodge loose rust bits. Do it 3-6 times, if on concrete, you see by the water that comes out, if any rust being flushed out with it.

 

Anyone rebuilding an old 50s-60s motor SHOULD ALWAYS REMOVE ALL OLD CORE PLUGS, thoroughly pressure flush all the lower insides of water gallery/block behind these removed core plugs, even dig round with something in there also trying to dislodge any well stuck rust/dirt there. Otherwise once you start using your new motor, all this stuff will over fiirst few thousand miles end up on top of your radiator top tank, blocking it. I get some fine mesh and make a cone that I fit inside top top tank hose hole before I fit up the radiator hose - face the open top of the cone towards the motor, make sure the pointy end is sealed/folded, so no flakes/bits can get through- the water will still pass through the open mesh though as long as mesh not too fine, blocked by stuff - I remove it after a few first miles to see if anything coming up from motor, clean it if there is - then again and again til it catching nothing - do not leave it in there permanently - it will totally block water flow if it fill enough with rust flakes etc.

 

Christopher Australia - last 4 months in south here have only seen one nice sunny day a month - near unbelievable, and frosts still in places at night - last year we already had had multiple days over 105 by now - global warming - yeah sure!!! This Sunday our national ausie rules football replays last week's Final - it a draw in the last minutes, for only 3rd time ever. Locust Plague - still too cold to hatch - aussie dollar to your USD?!,  near 97c, way better than 57c not too long ago. You might lose a few more 300s to aussie buyers if it stays up there, but then we have to win sometimes, and it has not been up this high since the 80s, when we floated our dollar - like a stone in reality!! 

To: allynentertainment@xxxxxxxxx; Chrysler300@xxxxxxxxxxxxxxx
From: c300@xxxxxxx
Date: Wed, 29 Sep 2010 21:54:00 -0700
Subject: RE: [Chrysler300] The Head Gasket


  




A low-tech test is to observe the liquid in the radiator top tank with the
engine running and warmed up (loosen or remove the cap before warming up the
engine). Leaks may show up as bubbling/foaming. I think the cooling system
can also be tested for leakage by pressurizing the system with a special
tool that locks onto the radiator tank opening, contains a pressurizing pump
and a pressure gauge. Pressure bleed down may indicate leakage into the
cylinder.

Rich Barber

Brentwood, CA

From: Chrysler300@xxxxxxxxxxxxxxx [mailto:Chrysler300@xxxxxxxxxxxxxxx] On
Behalf Of Matt Allyn
Sent: Wednesday, September 29, 2010 7:46 PM
To: Chrysler300@xxxxxxxxxxxxxxx
Subject: [Chrysler300] The Head Gasket

What is the testing procedure to determine if one has a cracked head gasket?
It's has been rather HOT here in Southern California lately....so I am
concerned 
with how my temp gauge is reading; even when driving home in the cool, cool,

cool of the evenings.

Thanks!

Matt Allyn

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