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Radiator Cap PSI

Forum: C3 HVAC, Fuel, Emissions, and Exhaust

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Radiator Cap PSI

Posted: 8/18/06 9:19pmMessage 1 of 9
2
2 cruzn
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Poquoson, VA - USA
Joined: 11/20/2004
Posts: 1024
Vette(s): 73 Conv, Blue-Green/White Top - 454, M21 - Dark Saddle Leather, Power Windows, A/C, Tilt/Tele, AM/FM St. (orig. and sounds like it too).#2 -- 2007 Coupe,3 LT package, Z51 option, Victory Red, Ebony Int. Clear Top.
Anyone know what pressure cap is used on a 454.. "73 stock? I am running a 16# right now...
Lifetime Member #86

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"



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Radiator Cap PSI

Posted: 8/18/06 9:24pmMessage 2 of 9
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Adams' Apple
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Duncanville, TX - USA
Joined: 11/8/2003
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Vette(s): #1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas
That should be about right...
15-18 lbs is normal for these years.

Check yer owner's manual? Adams' Apple38947.8922222222

Joel Adams
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Radiator Cap PSI

Posted: 8/18/06 10:10pmMessage 3 of 9
w
warbird
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Roseland, NJ - USA
Joined: 12/4/2003
Posts: 966
Vette(s): 1974, 454 with 4 on the floor, matching numbers.
I have a 15 on my 74/454
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Radiator Cap PSI

Posted: 8/19/06 4:03amMessage 4 of 9
2
2 cruzn
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Poquoson, VA - USA
Joined: 11/20/2004
Posts: 1024
Vette(s): 73 Conv, Blue-Green/White Top - 454, M21 - Dark Saddle Leather, Power Windows, A/C, Tilt/Tele, AM/FM St. (orig. and sounds like it too).#2 -- 2007 Coupe,3 LT package, Z51 option, Victory Red, Ebony Int. Clear Top.

[QUOTE=Adams' Apple]

Check yer owner's manual? [/QUOTE]

This is my owners manual.. thanks...

Lifetime Member #86

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"



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Radiator Cap PSI

Posted: 8/19/06 6:49amMessage 5 of 9
I
Iron82
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Vette(s): 1982 Collector Edition #3413
[QUOTE=2 cruzn][QUOTE=Adams' Apple]

Check yer owner's manual? [/QUOTE]

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.   

Iron8238948.2845138889
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Radiator Cap PSI

Posted: 8/19/06 8:08amMessage 6 of 9
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kstyer
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Vette(s): 1975 C3 Red, T-Tops, Black Interior. All I need is time and money! Getting there!

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.

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Radiator Cap PSI

Posted: 8/19/06 2:19pmMessage 7 of 9
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cthulhu
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Hot Springs, AR - USA
Joined: 4/24/2004
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Vette(s): 69 Conv #'s match 427, TKO-600/.64, 3.36HD-Posi, HT, T/T, PS, PB, PW, SP, Leather, Comp XE264HR & Roller Rockers & Lifters, Air-Gap RPM intake, Holley St Av 770 VS, MSD 6AL+Dist+Blaster SS, K&N, Jet-Hot Hooker Side-Pipes, Steeroids, Al Rad, Spal Fans
[QUOTE=kstyer]

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.

 

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Radiator Cap PSI

Posted: 8/19/06 4:16pmMessage 8 of 9
J
JacksL71
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sussex, NJ - USA
Joined: 11/15/2002
Posts: 299
Vette(s): 1969 L71 riverside gold convertible on frame restoration numbers matching motor 4:11 factory rear 4speed with hooker side pipes
check out this site, reproduction owners manual for 12 bucks I bought one for my 69 looks original.http://www.carmanuals.com/corvette.htm  scroll down the page till you get to owner manuals
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Radiator Cap PSI

Posted: 8/20/06 10:37amMessage 9 of 9
2
2 cruzn
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Poquoson, VA - USA
Joined: 11/20/2004
Posts: 1024
Vette(s): 73 Conv, Blue-Green/White Top - 454, M21 - Dark Saddle Leather, Power Windows, A/C, Tilt/Tele, AM/FM St. (orig. and sounds like it too).#2 -- 2007 Coupe,3 LT package, Z51 option, Victory Red, Ebony Int. Clear Top.
[QUOTE=kstyer]

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

2 cruzn38949.449525463
Lifetime Member #86

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"



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