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1、1998年日产千里马Maxima原厂维修手册(英文版)-LC ENGINE LUBRICATION& COOLING SYSTEMS SECTION LC Go to Table of Contents Go to Quick Reference Index SEM164F Liquid Gasket Application Procedure AEM080 e a scraper to remove all traces of old liquid gasket from mating surfaces and grooves.Also,completely clean any oil fr
2、om these areas. b.Apply a continuous bead of liquid gasket to mating surfaces.(Use Genuine RTV silicone sealant Part No.999MP-A7007,Three Bond TB1207D or equivalent.) c.Apply liquid gasket around the inner side of bolt holes (unless otherwise specified). d.Assembly should be done within 5minutes aft
3、er coating. e. Wait at least 30minutes before refilling engine oil and engine coolant. Special Service Tools The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.Tool number (Kent-Moore No.)Tool name Description ST25051001(J25695-1) Oil pressure gauge
4、 NT050 ST25052000(J25695-2) Hose NT051 Adapting oil pressure gauge to upper oil pan WS39930000() Tube pressure NT052 Pressing the tube of liquid gasket EG17650301(J33984-A) Radiator cap tester adapter NT053 Adapting radiator cap tester to radiator filler neck KV99103510() Radiator plate pliers A NT2
5、24 Installing radiator upper and lower tanks KV99103520() Radiator plate pliers B NT225 Removing radiator upper and lower tanks Lubrication Circuit SLC036B SLC037B SLC930A Oil Pressure Check SLC926 WARNING: ?Be careful not to burn yourself,as the engine and oil may be hot. ?Oil pressure check should
6、 be done in “Neutral position” (M/T)or “Parking position”(A/T).1.Check oil level. 2.Remove oil pressure switch. 3.Install pressure gauge. 4.Start engine and warm it up to normal operating temperature. 5.Check oil pressure with engine running under no-load. Engine speed rpm Approximate discharge pres
7、sure kPa (kg/cm 2,psi)Idle speed 3,000 More than 69(0.70,10.0) 435-551(4.44-5.62,63.1-79.9) If difference is extreme,check oil passage and oil pump for oil leaks. 6.Install oil pressure switch with sealant. Oil Pump REMOVAL AND INSTALLATION CAUTION: When removing the oil pans,oil pump assembly and t
8、iming chain from engine,first remove the camshaft position sensor (PHASE)and the crankshaft position sensor (REF)/(POS)from the assembly. Be careful not to damage sensor edge.1.Drain engine oil.2.Remove drive belts. 3.Remove camshaft position sensor (PHASE),and crankshaft position sensor (REF)/(POS)
9、.4.Remove engine lower covers.5.Remove crankshaft pulley. 6.Remove front exhaust tube and its support. 7.Support engine at right and left side engine slingers with a suitable hoist. 8.Remove engine right side mounting insulator and bracket bolts and nuts. 9.Remove center member assembly. 10.Remove a
10、ir compressor assembly and bracket. 11.Remove oil pans.(Refer to “Removal”of “OIL PAN”in EM section.) 12.Remove water pump cover.13.Remove front cover assembly. 14.Remove timing chain.(Refer to “Removal”of “TIMING CHAIN” in EM section.) 15.Remove oil pump assembly. 16.Reinstall any parts removed in
11、reverse order of removal. DISASSEMBLY AND ASSEMBLY SLC155B ?When installing oil pump,apply engine oil to gears. SLC932A OIL PUMP INSPECTION Using a feeler gauge,straightedge and micrometers,check the following clearances: Unit:mm(in) Body to outer gear radial clearance k10.114-0.200(0.0045-0.0079) I
12、nner gear to outer gear tip clearance k2Below0.18(0.0071) Body to inner gear axial clearance k30.030-0.070(0.0012-0.0028) Body to outer gear axial clearance k40.050-0.110(0.0020-0.0043) Inner gear to brazed portion of housing clear- ance k5 0.045-0.091(0.0018-0.0036) 2 ?If body to gear clearances(k1
13、,k3,k4,k5)exceed the limit, replace oil pump body assembly. SLC934AA SLC959A REGULATOR VALVE INSPECTION 1.Visually inspect components for wear and damage. 2.Check oil pressure regulator valve sliding surface and valve spring. 3.Coat regulator valve with engine oil.Check that it falls smoothly into t
14、he valve hole by its own weight. If damaged,replace regulator valve set or oil pump body. SLC935AA 4.Check regulator valve to oil pump body clearance. Clearance: k6:0.040-0.097mm(0.0016-0.0038in) If it exceeds the limit,replace oil pump body. SLC035B OIL FILTER The oil filter is a small,full-flow ca
15、rtridge type and is provided with a relief valve. Cooling Circuit SLC936A SLC937A System Check SLC755A WARNING: Never remove the radiator cap when the engine is hot;serious burns could be caused by high pressure fluid escaping from the radiator. Wrap a thick cloth around the cap and carefully remove
16、 it by turning it a quarter turn to allow built-up pressure to escape and then turn the cap all the way off. CHECKING COOLING SYSTEM HOSES Check hoses for improper attachment,leaks,cracks,damage, loose connections,chafing and deterioration. CHECKING RADIATOR CAP To check radiator cap,apply pressure
17、to cap with a tester. Radiator cap relief pressure: Standard 78-98kPa (0.8-1.0kg/cm2,11-14psi) Limit 59-98kPa (0.6-1.0kg/cm2,9-14psi) SMA967B Pull the negative pressure valve to open it. Check that it closes completely when released. SLC756A CHECKING COOLING SYSTEM FOR LEAKS To check for leakage,app
18、ly pressure to the cooling system with a tester. Testing pressure: 157kPa(1.6kg/cm2,23psi) CAUTION: Higher than the specified pressure may cause radiator dam-age. Water Pump CAUTION: ?When removing water pump assembly,be careful not to get coolant on drive belt. ?Water pump cannot be disassembled an
19、d should be replaced as a unit. ?After installing water pump,connect hose and clamp securely,then check for leaks using radiator cap tester. SLC154B SLC939A REMOVAL 1.Drain coolant from drain plugs on radiator and both sides of cylinder block. Refer to“Changing Engine Coolant”in MA section. 2.Remove
20、 right side engine mounting,mounting bracket and nuts. 3.Remove drive belts and idler pulley bracket. 4.Remove water pump drain plug. 5.Remove chain tensioner cover and water pump cover. 6.Pushing timing chain tensioner sleeve,apply a stopper pin so it does not return.Then remove the chain tensioner
21、 assembly. SLC941A 7.Remove the3water pump fixing bolts.Secure a gap between water pump gear and timing chain,by turning crankshaft pul-ley20backwards. SLC942A 8.Put M8bolts to two M8-threaded holes out of3water pump fixing bolt holes. 9.Tighten M8bolts by turning half turn alternately until they reach timing chain rear case. ?In order to prevent damages to water pump or timing chain rear case,do not tighten one bolt continuously.Always turn each bolt half turn each time. 10.Lift up water pump and remove it. ?When lifting up water pump,do not allow water pump gear to hit timing chain.