Topic: Radiator Cap PSI
in Forum: C3 Cooling and Heating Systems

USN 1966-1970
WestPac 67-68 Tet I&II
Featured in Corvette Enthusiast Aug 2007 "Shark Attack"
Blue Green *** 454,4 Spd, Dark Saddle Leather, A/C, AM-FM St. (orig), PW, Tilt -Tele Wheel"

(click to see a bigger image)

Moderator

15-18 lbs is normal for these years.

Check yer owner's manual?

Joel Adams
C3VR Lifetime Member #56
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"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"

[QUOTE=Adams' Apple]
Check yer owner's manual? [/QUOTE]
This is my owners manual.. thanks...
USN 1966-1970
WestPac 67-68 Tet I&II
Featured in Corvette Enthusiast Aug 2007 "Shark Attack"
Blue Green *** 454,4 Spd, Dark Saddle Leather, A/C, AM-FM St. (orig), PW, Tilt -Tele Wheel"

(click to see a bigger image)

Check yer owner's manual?

This is my owners manual.. thanks...[/QUOTE]
An off the topic question but when people go out to buy any year vette or vehicle in that matter make sure they come with an owners manual? I know when I was looking for mine I made sure it came with one. No hardship Ray and everyone else. Just a question.
Many many cars are sold without the owners manual. The older the mor often it happens.
For every 1 pound of pressure, the boiling point of coolant will rise 3 degrees. 15 lb cap raises boiling point by 45 degrees.

Many many cars are sold without the owners manual. The older the mor often it happens.
For every 1 pound of pressure, the boiling point of coolant will rise 3 degrees. 15 lb cap raises boiling point by 45 degrees.
[/QUOTE]
not to mention that alot of information in an owners manual on an older car can be technically inaccurate nowadays.
Think about the advances and changes made in Fuel, Oil, Brake Fluid, Trans Fluid, PS Fluid, Coolant, etc etc etc since 1969.

Many many cars are sold without the owners manual. The older the mor often it happens.
For every 1 pound of pressure, the boiling point of coolant will rise 3 degrees. 15 lb cap raises boiling point by 45 degrees.
[/QUOTE] None taken either Mike.. I'm always open to advice, but I looked in both my manuals (did not check owners manual tho) and didn't see anywhere about the cap pressure, but I may have overlooked it. I have been having problems with water pumps and just wanted to make sure I had the right cap.Mine was marked 16 PSI. I did check my cap with a Stant tester and it was lifting about 15-16 psi...
Informative sight on the importance of a radiator cap...
http://www.are.com.au/feat/techt/importance_of_the_radiator_ cap.htm
USN 1966-1970
WestPac 67-68 Tet I&II
Featured in Corvette Enthusiast Aug 2007 "Shark Attack"
Blue Green *** 454,4 Spd, Dark Saddle Leather, A/C, AM-FM St. (orig), PW, Tilt -Tele Wheel"

(click to see a bigger image)