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Technical Service Manual January 1975
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VI COOLING Z 9 ml cllilllf Lllklll Coolant level when cold should be 1 1 2 inches to 2 inches below the rear of the radiator filler neck seal Should a leak in the oil cooler occur it can be detec ing surface and nt normal operating temperature it wd by the prewnce uf transmission fluid in the should be 1 2 inch to 1 inch new this surface If coolant If fluid appears in the coolant check the fluid necessary to check level me engine for a ew level of the automatic transmission If the fluid level moments to wo it down If engine is gvgphqamd and is low check the oil cooler as follows all coolant has not been lost operate engine above d 1 Remove trunsmissivn to cooler lines at curb idle speed for a few moments with hood up then ra iator shut en ne off and let it cool 15 minutes before 2 Plug one fitting in cooler removinglcap 3 Remove radiator cap and fill radiator so bub bles can beseen WARNING Use extreme care when removing the 4 Apply shop line pressure 50 to 200 psi w mpfmm ahot radiator Ifpossible won until me en other fitting gine has cooled then wrap a thick cloth around the Bubbles in coolant at filler neck indicate a leak in radiator cop and turn it slowly to the first stop Step oil cooler Should a leak in the oil cooler occur bank while the pressure ia released from the cooling radiator must be removed and repaired system When you are sure all the pressure has been released press down on the cup with a cloth turn and CAUTION Because of high oil pressure con remuoveit ventiomzl soldering must not be med for cril cooler Qizzzal All repairs must be ulvcred soldered or Dnlnlnl ummm Coolant is drained from the radiator by loosening Ilm and Balt Inspautlon the drain cock on the bottom tank Coolant is drained from the engine block by remov Check hoses at regular intervals by squeezing lf a ing me drain plugs hose is cracked or feels brittle when squeezed it Six Cylinder Two located on left side of block should be replaced If a hose swells excessively when which may be replaced by one or two CTW under pressure it should be replaced Inspect V belts switches frequently for defects such as extreme dryness fray V 8 Centrally located on each side of block ing or cracking WARNING Do not remove bhzck drains with system CAUTION Do not use any oommermkzl belt dressing under pressure or serious burns from coohnt may or 0il based lubricant on any drive belt D0 not dress gcwp the sides of any drive belt with a file or other abrasive Eawh belt hda 5 to 6 tensile members wrap mmnn perl around it and if these members are cut the belt f Before manning install all umn plugs and tighten radiator drain cock Add the proper mixture of coolant coun to meet local requirements for freeze protection CAUTION Antifreeze concentration MUST Maintain coolant level with a mixture of ethylene ALWAYS BE at leon 44 percent 20 F freezing glycobbased antifreeze and low mineral content water point ygmamumi ami in all climates Lf omwentmtion is lower engine parts can be eroded from cdvitation zglgxgyggQUixiiiiogycgsigggmggg T a Qn 8mz Fjill the radiator to the proper coolant level the tection is provided with a 68 percent concentration radiator mpi k t which prevents frwzing to 90 E A higher pewemage After refilling tlie system 01 whgnbaiglp nc fe s are willfreeze at a higher pgmtl Fm emmpk WM mm suspected the cooling system s oul e e o excess freeze freezes or 8 R Antifreeze concentration MUST am AL WA YS be at least U percent 20 F freezing point yearwound and in all climates If coiwentmlion is BI dI M l 0II SQSIIIII lower engine parts can be eroded from a condition cdl led mq i agi4 m Trapped air will hamper or stop coolant flow or cause burpin of engine coolant out of the radiator CAUTION Coolant mdditives which chim to improve Bleed air by operating the engine with a properly engine cooling should not be used filled cooling system with the radiator cap off until coo