[Healeys] Head Gasket

[warthodson at aol.com]

Bob,If Dynolite does not work, I would try 20W50 motor oil. I have read that it is an excellent heat transfer agent & should also be good for the water pump bearings. Also, any leaks in the head gasket might go undetected!
Your welcome,Gary Hodson

-----Original Message-----
From: Bob Spidell <bspidell at comcast.net>
To: healeys at autox.team.net
Sent: Thu, Feb 24, 2022 10:44 am
Subject: Re: [Healeys] Head Gasket

 Which, of course, is the theory of the various 'water wetter' products. I tried (the original, I think) Water Wetter from Redline and didn't notice a significant reduction in coolant temp; but, I've got a bottle of the Dynolite version on the shelf I'll throw in the next time I change out coolant. As they say: "Hope springs eternal."
 
 
 On 2/24/2022 8:30 AM, Michael Salter wrote:
  
 
 Interesting article Bob but IMHO their statement:  "Pressure in a cooling system is vital for keeping water in contact with the metal surfaces of the cylinder heads and block."
  is something of an over simplification. 
  The reality is that any "boiling " of the coolant produces a "bubble" of gaseous coolant, there is no air, as such, involved.  Their statement : "Pressure keeps the air compressed and maintains the water-to-metal contact. "
  suggests that the cooling system contains air; it shouldn't contain any air, other perhaps the very small quantity disolved in the coolant. Pressurizing the cooling system raises the boiling point. Raising the boiling point means that the temperature of the engine surfaces where gaseous coolant will be generated will also  need to be higher for boiling to occur. As the rate of heat radiation from the cooling surfaces is proportional to the 4th power of the absolute temperature there is also a considerable increase in the amount of energy that can be dissipated by the radiator.  These things together make pressuring the cooling system even to only 7 p.s.i. very advantageous.  As I mentioned earlier the problem with the 100 insofar as cooling system pressure is concerned is the carbon seal in the water pump and perhaps the design of the radiator tanks. 
  M 
  
   
  
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