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Re: Restoring Rusty
One of the pressure tests I typically do is to pressurize the system and run the engine. If the needle doesn't fluctuate or drop like a rock I don't usually have a problem.
You can get cooling system pressure testers from AutoZone's loaner tools.
10PSI is a little low for the radiator cap. They are usually rated for 14-16PSI. Every PSI drop is @ 4.333333°F lower boiling point.
Pure water boils at 228°F at 10PSI vs 254°F at 16PSI. 50:50 Coolant:Water will raise the boiling point around 10°F.
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1959 M35A2 LDT465-1D SOLD
1967 Dodge W200 B383, NP420/NP201 SOLD
1969 Dodge Polara 500 B383, A833 SOLD
1972 Ford F250 FE390, NP435/NP205 SOLD
1976 Chevy K20, 6.5L, NV4500/NP208 SOLD
1986 M1008 CUCV SOLD
2000 GMC C2500, TD6.5L, NV4500
2005 Chevy Silverado LS 2500HD 6.0L 4L80E/NP263
2009 Impala SS LS4 V8
RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials... Please include at least the year and model in your threads. It'll be easier to answer your questions.
And please let us know if and how your repairs were successful.
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