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**hatzie** · 09-02-2016, 02:29 PM

You're missing the fan shroud and the stock clutch fan.
https://www.google.com/search?q=1985...hroud&ie=UTF-8
Engines can overheat just sitting without the shroud to direct airflow through the radiator. A properly working fan clutch will improve fuel mileage and improve cooling at idle.
Install the thermostat as well. It'll keep the heads at a more consistent temperature.
Install a new radiator cap as well. This will keep the system pressure at 12-15psi. Pressure raises the boiling point.

The missing thermostat and fan clutch says there was a problem before they were removed. It might be as simple as the bad water pump or it may be more

09-02-2016, 02:29 PM	#9
hatzie Moderator Join Date: Oct 2008 Location: Wentworth, NH Posts: 5,022	Re: Boiling over....... You're missing the fan shroud and the stock clutch fan. https://www.google.com/search?q=1985...hroud&ie=UTF-8 Engines can overheat just sitting without the shroud to direct airflow through the radiator. A properly working fan clutch will improve fuel mileage and improve cooling at idle. Install the thermostat as well. It'll keep the heads at a more consistent temperature. Install a new radiator cap as well. This will keep the system pressure at 12-15psi. Pressure raises the boiling point. The missing thermostat and fan clutch says there was a problem before they were removed. It might be as simple as the bad water pump or it may be more __________________ 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... 1973-1991 GM Light Truck Service, Unit/Overhaul, Wiring Manuals, Parts Books and Some 1968-1999 GM Service Training textbooks in PDF 1988-1998 GMT400 CK service manual project 1988-1993 GMT400 CK parts books. 1967-1972 GM Light, Medium, & Heavy Truck Service Manuals in PDF 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. Last edited by hatzie; 09-02-2016 at 02:49 PM.