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Not exactly.....
Quote:
Originally Posted by Knightrider966
It sounds like you increased the coolant to water strength to a higher concentration than before. Coolant/antifreese will increase pressure and temperature at coolant concentrations greater than 70%. Unless your in a really cold climate, a mixture at 50/50 is usually best!  |
Your coolant (whatever the mix) absorbs heat from the engine block, and transfers it to the atmosphere via the radiator.....if all parts of the system are operating "as designed" then there should be no difference in operating temperature and pressure......
The pressure within the cooling system is controlled by the "Pressure Cap"......and is unaffected by the coolant.......it will relieve excess pressure, only.......thus maintaining a maximum allowable pressure within the system......
SB
I went back and re-read the original post.....your radiator cap is designed to allow excess pressure to vent from the cooling system, but it also should allow atmosphere back into the system as it cools...... check your radiator cap!!!......sounds as if it's not allowing atmosphere back into the system, thus forming a vacuum within the system when cooled.....
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Diesels:
'85 300D, "Max, Blue Benz", 155K, 27.0 MPG
'84 190D 2.2, "Eva, Brown Benz", 142K, 40.2 MPG
'77 240D (parts car)
'67 Eicher ES 202 Tractor "Otto" (2cyl, Air Cooled, 30HP)
Gassers:
'94 Ford F-150, "Henry", 170K (300 Six) 17.5 MPG
'85 190E 2.3, 148K....Parts Car
'58 Dodge W300M Powerwagon (Flat Fenders) Less than 10 MPG
Last edited by Shorebilly; 04-14-2007 at 07:06 AM.
Reason: additional commentary
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