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Credit: Eddy

OEM Part Number: 21430-7999C
Price: $12-$15.00

While the radiator cap is just a tiny component of your vehicle’s cooling system it plays a critical role in helping the engine keep its cool. If you’re wondering whether a bad radiator cap can cause overheating, the answer is a definite yes.

Air pockets in the cooling system from an ineffective seal (such as one in a bad radiator cap) or a lack of sufficient pressure can cause the engine to overheat. The latter lowers the boiling point of coolant which makes it unable to absorb enough heat from the engine. If you see the temperature gauge on the dashboard rise, it’s wise to stop driving as soon as it’s safe to do so and wait for the engine to cool before continuing (or call a tow truck).

If you notice an unexplained coolant from your vehicle’s cooling system or you find your vehicle’s engine is running a little hotter than usual, there could be a problem with the radiator cap.

Please note: Since the cooling system is hot and under pressure when the vehicle has been running, it is very important that you never open the radiator cap until the vehicle has cooled completely. If you attempt to remove the radiator cap while the engine is warm, the coolant (likely as hot as boiling water) would shoot out and could seriously injure you; third-degree burns are a very real possibility.

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This is another option for buying O2 Simulator. They have been testing and fully working on 2002-2003 5thgen Maximas. Should also work on 2004-2008 6thgen Maximas as well.

Price: $199.98
Website: http://www.area74.ca/product/io2-universal-oxygen-sensor-simulator/

The iO2 was originally developed as tool to aid in the diagnosis of catalytic converter and oxygen sensor fault codes.We believe this is the most intelligent oxygen sensor simulator available, that’s why we named it the iO2. The iO2 uses the vehicles live oxygen sensor signal to emulate and output a signal that closely resembles that of  a good  functioning catalyst.

The desire to simulate an o2 sensor begins with the desire to remove the catalytic converters to allow free’er exhaust flow. The trouble is, the rear o2 monitors the exhaust content and the PCM can determine if the catalyst if performing or not. If the catalyst is removed, the PCM usually starts reporting P0420,p0430 faults for catalyst efficiency.

Simulation approaches in our research showed two basic idea’s, an electronic and a exhaust spacer approach (defoulers)

Electronic Simulators 

555

Let’s start with electronic, the 555 timer. Developed years ago the 555 timer was and still is the electronics hobbyist dream.The 555 timer was setup in such a fashion to simply output 450 mv to keep the PCM thinking the rear o2 was present.
However as PCM’s grew in software function, tests were added to check if the rear o2 was actually able to produce a voltage range of 0-1 volt.Of course, this made the original 555 design obsolete, so the output of the 555 was changed to pulse from 0-1 volt at a fixed or even adjustable rate, this is the most current use of the 555 that we know of.
This does work for older technology, however it is hit or miss or will not work for newer PCM’s. It is a unreliable approach that will more than likely lead to an catalyst efficiency fault at some point.

 

The resistor capacitor fix….cap

An very common electronic filter circuit, but does it work?
About as well as the 555, yes and no, its once again hit or miss dependent on the vehicle. It will pass the PCM’s test for o2 sensor activity, just like the 555 timer will, but when it comes time to test for catalyst efficiency (p0420,p0430) that’s when they fall short.

Defoulers….

defouler

The direct approach, this seems to be very popular maybe      because electronic approaches haven’t been very reliable, and its  cheap. Do they work? once again yes, and no. First they are far  from from stealthy, secondly they require routine maintenance.

They are not a guarantee for every vehicle, difficult to get just right  and require cleaning from time to time

At any rate, we just wanted to provide some insight based on our research.

The io2 IS different.

The io2 itself, is actually a programmed device that reads an actual o2 sensor voltage, then cleans it up.
The software within the io2 will force the output to act as though a catalytic converter is present in the exhaust. So the PCM will see the signal, pass the o2 function test and when it comes time for the dreaded p0420,p0430 the software takes care of that too.

scantool2The io2 during testing. The io2 was installed on a 2007 Chrysler product to field test the software. This test vehicle was driven in excess of 850 km’s in all driving conditions, with no P0420 or catalyst efficiency codes generated.
the io2 was installed on bank1, input was taken from the bank1 primary O2, the rear o2 sense wire was cut and spliced to the io2 output.

 

Question and Answers

Question; What about some other devices on the market for simulating o2 sensors?

Answer; Many devices currently on the market are based on a 555 timer, or a simple low pass filter circuit. Yes they do work, sometimes, sometimes they don’t, they are hit or miss. The iO2 is a programmed microcontroller with software that creates the simulated output voltage, we feel the most reliable approach.

Question; How many iO2’s will I need? some devices can be wired to two o2 sensors at the same time.

Answer; you will need as many io2’s as you have rear oxygen sensors (please see our support page). You cannot reliably  use a single simulator for two rear o2 sensors, eventually the engine computer on many vehicles will try to test the function of the rear o2 sensors, it may not test each one at the same time, unlike other simulators,the io2’s software is designed to recognize these tests,so simply put, this will not and cannot work.

Question; Will the iO2 work on my “whatever” vehicle?

Answer, YES! as long as you are using a low band O2 sensor as the input (every vehicle uses a low band for the rear O2 sensor) and the output is simulating a low band O2. This includes all vehicles, even Chrysler,Jeep and Dodge products.

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2000-2001 MAXIMA BILL OF MATERIALS

PART# DESCRIPTION – PART# 407500 QTY

AIR FILTER ASSEMBLY

  • 402960L K&N Air Filter 1
  • 407500-29 Adapter air filter 1
  • 407500-30 support bracket, tubular 1
  • 407500-31 support bracket, “Z” type 1
  • 407000-67 rubber isolator 2
  • 407000-68 rubber isolator, inner sleeve 2
  • 407500-34 M6-1.0x 16mm flange HHCS 5
  • 407500-40 M6-1.0x 30mm flange HHCS 2
  • 407500-41 M6-1.0 flange hex nut 1
  • 402991 #1/4 flat washer 2

VORTECH SUPERCHARGER ASSEMBLY

  • 407500-01 Supercharger 1
  • 407500-02 modify supercharger drive pulley 1
  • 407500-03 modify supercharger pulley washer 1
  • 407000-05 Supercharger adapter plate assembly – Aluminum 1
  • 407000-36 M12x70mm Flat head bolt 2
  • 407000-37 3/8 -16x 4-1/2 flat head cap screw 4
  • 407000-74 M 12X50 mm Flat Head Bolt 1
  • 407500-04 Steel Fitting, 90 deg – 4 AN – 1/8 NPT M (fitted into S/C) 1
  • 407000-45 M6x 1.0x 55mm hex head cap screw ZP 2
  • 407500-08 Serpentine Belt 1
  • 400950-4 serrated spring washer 2
  • 407000-76 3/8-24X1″ flat head cap screw 1

CRANKCASE BREATHER HOSE ASSEMBLY

  • 402935-6 5/8″ ID Crank case breather hose (407000-15 may sub)2ft
  • 407500-32 hose elbow 90 deg, 5/8″ w/ 1/4″ tee 1
  • 407500-43 vacuum tee, 5/16″run x 3/16″ branch 1

OIL FEED LINE ASSEMBLY

  • 407500-25 OIL FEED LINE,-4S.S BRAIDED LINE 1
  • 407000-17 aluminum spacers, dia 1/2″ OD x dia 1/4″ ID x 1/2″ long 3
  • 402990 M6x 1.0 x25mm HHCS 3
  • 318110 M6 flatwasher 3
  • 407000-56 Steel Fitting, 4m. To 1/8 NPT M 1
  • 407000-57 Steel Fitting, 1/8 NPT M – 1/8NPT M 1
  • 407000-58 Steel Fitting, 1/8 NT FEM, 3 way tee 1
  • 407100-04 Adel clamps, size SG6 3

BELT ADJUSTER/PULLEY ASSEMBLY

  • 407500-24 Flat Belt Idler Pulley, 2″ w/o rails 1
  • 407500-22 Base Bracket ( tensioner brkt assy! ) 1
  • 407500-23 Spacer Pulley 1

IDLER PULLEY ASSEMBLY

  • 407500-09 2″ DIA Pulley w/o side rails 1
  • 407500-07 1/2 – 13x 1-1/2 HHCS ZP 1
  • 407000-73 M12 Flat Washer 1
  • 407500-10 Idler Pulley Bushing 1

FUEL PUMP ASSEMBLY

  • 402991 1/4 Flat Washer 2
  • 318109 M6 Split Lock Washer 2
  • 402990 M6-1.0 x 25mm Hex HD cap screw 2
  • 405030-6 Cable ties 11″ 4
  • 407000-09 Bracket, Auxiliary fuel pump 1
  • 407000-40 1/4-20 nyloc hex nut 2
  • 407000-47 FMU mounting bracket 1
  • 407000-64 5/16 MPI fuel hose 8ft
  • 407000-67 Isolator rubber grommet 2
  • 407000-68 Isolator sleeve 2
  • 407000-75 #4 hose clamp 9
  • 407000-80 10-24 x 3/8″ PH pan hd screw 3
  • 407000-85 1/4-20x 1/2″ FL, Soc., hd screw 2
  • 407000-87 #20 Adel Clamp 2
  • 407500-20 FMU 8:1, w/ 5/16″ barb fitting (w/vortec) 1
  • 407500-27 Fuel Pump Assy w/ 5/16″ barb fitting 1
  • 407500-44 5/16″ barb fuel hose joiner 3
  • 407000-27 neopren rubber isolator 1/4-20 2

AUXILIARY FUEL PUMP ELECTRICAL ASSEMBLY

  • Fuel pump relay electrical assembly (Bosch relay from Vortec)
  • 318110 M6 flat washer 1
  • 407000-49 Fuel pump pressure switch 1
  • 407000-55 Hobb/boost switch bracket 1
  • 407000-60 1/2″ OD x 1-1/2″ aluminum spacer 1
  • 407000-88 Blue3M splice 1
  • 407500-06 M6-1.0x 65mm HHCS 1
  • 407000-89 Relay Bosch 12v 20/30 amp 1
  • 407000-90 Inline ATC fuse holder, 10-12GA Red 1
  • 407000-91 Fuse, ATC 25 amp 1
  • 407000-92 Wire – 18GA yellow – 6 ft. 1
  • 407000-93 Wire recepticle, female 18GA 3
  • 407000-94 Wire, 12GA red – 14 1/2″L 1
  • 407000-95 Wire recepticle, female 12GA 1
  • 407000-96 Butt connector 12GA 1
  • 407000-97 Wire connector, 10-12GA with 1/4″ ring 2
  • 407000-98 Wire connector, 18-22GA with #10 ring 2
  • 407000-99 Wire, 18GA Black 2
  • 407000-100 Wire, 18GA Red 2

POWER STEERING ASSEMBLY

  • 407000-16 Hose Power Steering to oil cooler, 3/8″ ID 8ft
  • 407500-37 12″L foam tube 1
  • 407000-75 hose clamp #4 2
  • 407100-01 aluminum “U” tube 1
  • 407100-02 perforated back strap, 18″L 1
  • 407100-03 M6-1.0x 12mm flange HHCS 3
  • 407100-04 adel clamps SG6 3

COOLANT BOTTLE RELOCATION ASSEMBLY

  • 407500-50 Coolant bottle relocation bracket 1
  • 407500-34 M6-1.0x 16mm flange HHCS 1

WINDSHIELD WASHER BOTTLE ASSEMBLY

  • 407500-36 molded hose 1
  • 408005 hose clamp, #24 2
  • 405030-6 cable ties, 11″ 1

BYPASS VALVE ASSEMBLY

  • 407000-24 Bosch bypass valve 1
  • 407000-62 Rubber Hose, 1″ID x 24″L 3ft
  • 407500-33 Hose Clamp, #12 narrow 4

FUSE BOX RELOCATION ASSEMBLY

  • 451070-4 Flat head 10-32×5/8 2
  • 407000-30 Fuse box relocation mounting bracket 1
  • 407000-31 Fuse box mounting brackets (teardrop) 1
  • 407000-35 M6-1.0 X 20mm HHCS 1
  • 407000-42 10-32 nylock nuts 2
  • 402993 M6-1.0 nylock hex nut 1
  • 318110 M6 flat washer 1

MODIFIED OIL DRAIN BACK PLATE ASSEMBLY

  • 407000-06 Modified oil drain back plate 1
  • 407500-26 Hose clamp #10 narrow 2
  • 407000-32 Blower oil drain back hose preformed 1

VACUUM LINE ASSEMBLY

  • 407500-28 Vacuum tees, 3/16″ 1
  • 503215-6 Vacuum lines, 5/32″ 4ft

PRESSURE PIPE ASSEMBLY

  • 404046 hose clamp #36 1
  • 405030-5 hose clamp #40 1
  • 407100-03 m6-1.0x 12mm flange HHCS 2
  • 407500-14 pressure pipe w/ welded mounting tabs 1
  • 407500-15 2″ L x 2-3/4″ID silicon hose 1
  • 407500-16 hose clamps #44 2
  • 407500-17 90 deg 3-1/2″ID x 2-1/2 ID hose 1

INLET PIPE ASSEMBLY

  • 407500-18 Inlet pipe assy 1
  • 407500-19 90 deg 3-1/2 ID x 2-1/2 ID hose 1
  • 407000-14 hose clamps #56 1
  • 405030-5 hose clamp #40 1
  • 3m5314 12″ long x 1/2″W double sided tape 1
  • 402956-04 14″ cable ties 2

ASSOCIATED HARDWARE ASSEMBLY

  • 407500-06 M6-1.0X 65mm HHCS, S/C plate to engine 1
  • 407500-42 m6 stand-off bolts, S/C plate to engine 2
  • 407000-33 M10-1.5x 60mm HHCS 2
  • 407000-34 M10 flat washer 2
  • 407000-45 M6-1.0 x 55mm HHCS 1
  • 407000-46 M6-1.0x 30mm HHCS 1
  • 407000-84 Cam Sensor Retainer Plate 1
  • 407500-11 M8-1.25x 25mm FHCS 1
  • 407500-12 M8-1.25x 30mm HHCS 1
  • 407500-13 m6-1.0 x20mm FHCS 1
  • 318109 M6 flat washer 2
  • 318110 M6 split lock washer 2
  • 407000-35 M6-1.0 x 20mm FHCS 1
  • 400950-4 Serrated spring washer 1

100505 Stillen SuperCharge Emblem
WARNING 92 Octane Label 1
STISUPER Stillen SuperCharge Decal 1

Assembly Person__________________________________
Date: / /
Sales Order #_____________________________________
Supercharger serial number:_________________________
Instruction sheet with pictures and schematics

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1995-1999 MAXIMA BILL OF MATERIALS

AIR FILTER ASSEMBLY

  • 407000-02 Steek Ubsert-air filter to supercharger 1
  • 407000-10 Air filter with holes drilled 1
  • 407000-11 Silicone Hose, Blue – dia 3-1/2 ” air filter to supercharger 1
  • 407000-14 Hose clamp #56 2
  • 407000-61 Blow-off hose niplle 1
  • 407000-65 air filter vent-45deg x 5/8″ dia 1
  • 407000-77 3/4″ dia rubber grommet 1

VORTECH SUPERCHARGER ASSEMBLY

  • 407500-01 Supercharger 1
  • 407500-05 Supercharger aluminum adapter plate assembly 1
  • 407000-36 M12x70mm Flat head bolt 2
  • 407000-74 M 12X50 mm Flat Head Bolt 1
  • 407000-76 3/8-24 x 1 Flat Head Bolt 1
  • 407000-45 m6-1.0x55mm bolts in plate assy 2
  • 407500-04 steel fitting 90 deg-4 an -1/8 npt m (fittewd into s/c) 1
  • 407500-08 serpentine belt 1
  • 407000-37 3/8-16 x 4 1/2 flat head cap screw 4
  • 400950-4 serrated spring washer 2

CRANKCASE BREATHER HOSE ASSEMBLY

  • 407000-15 48″ DIA5/8″ ID Crank case breather hose 4ft
  • 407000-66 90 deg. Dia5/8″ OD Plastic vent line adapter 1

OIL FEED LINE,ASSEMBLEY

  • 407500-25 oil feed line -4 s.s braided line 1
  • 407000-17 aluminum spacers, dia 1/2″ OD x dia 1/4″ ID x 1/2″ long 3
  • 402990 M6x1.0x25MM HHCS 3
  • 318110 m6 flat washer 3
  • 407000-56 steel fitting 4m to 1/8 npt m 1
  • 407000-57 steel fitting 1/8 npt m-1/8 npt m 1
  • 407000-58 steel fitting 1/8 fem 3way tee 1
  • 407100-04 adel clamps size sg6 3

BELT ADJUSTER / PULLEY ASSY

  • 407500-24 flat belt idler pulley, 2.0 w/rails 1
  • 407500-22 base bracket 1
  • 407500-23 spacer pulley 1

IDLER PULLEY ASSY

  • 407500-09 2″ dia pulley w/o side rails 1
  • 407500-07 1/2-13 x 1-1/2 hhcs zp 1
  • 407000-73 m12 flat washer 1
  • 407500-10 bushing 1

FUEL PUMP ASSEMBLY

  • 402991 1/4 Flat Washer 2
  • 318109 m6 split lock washer 2
  • 402990 m6-1.0 x 25mm hex hd cap screw 2
  • 405030-6 cable ties 11″ 4
  • 407000-09 mounting plate, fuel pump assy 1
  • 407000-27 1/4-20 Male stud/Female rubber isolator 2
  • 407000-40 1/4 -20 Nylon Locking Nut 2
  • 407000-47 fmu mounting bracket 1
  • 407000-64 5/16″ mpi fuel hose 8ft
  • 407000-67 insulators rubber grommet 2
  • 407000-68 Isolator sleeve 2
  • 407000-75 #4 hose clamps 9
  • 407000-80 10-24 x 3/8″ ph pan hd screw 3
  • 407000-87 #20 adel clamps 2
  • 407500-20 fmu 8:1 w/ 5/16″ barb fitting ( w / vortech ) 1
  • 407500-27 fuel pump w / barb fitting 1
  • 407500-44 5/16″ barb guel hose joiner 1
  • 407000-85 1/4-20 x 1/2″ flat head cap screw 2

AUXILIARY FUEL PUMP ELECTRICAL ASSY

  • 318110 m6 flat washer 1
  • 407000-49 fuel pump pressure switch 1
  • 407000-55A hobb/boost switch bracket 1
  • 407000-60 1/2″ OD x 1-1/2 aluminum spacer 1
  • 407000-88 Blue3M splice 1
  • 407500-06 m6-1.0x65mm hhcs 1
  • 407000-89 relay bosch 12v 20/30 amp 1
  • 407000-90 in line atc fuse holder 10-12ga red 1
  • 407000-91 fuse atc 25 amp 1
  • 407000-92 wire 18ga yellow – 6ft 1
  • 407000-93 wire recepticle,female 18ga 3
  • 407000-94 wire 12ga red 14 1/2″ length 1
  • 407000-95 wire recepticle, female 12ga 1
  • 407000-96 12ga butt connector 1
  • 407000-97 wire connector, 10-12ga w 1/4 ring 2
  • 407000-98 wire connector, 18-22ga w/#10 ring 2
  • 407000-99 wire 18ga black 2
  • 407000-100 wire 18ga red 2
  • 407000-16 hose pwr steering to oil cooler 3/8 ID 8FT

Additional only for 1999-2000 model

  • see 407100 Power steering oil cooler-Stillen (1999 models)
  • part of Adel clamps SG-6 (1999 models) 407100-04
  • BOM M6x1.0x10mm Flange bolt (1999 models) 407100-03
  • P/N M6x1.0 Nylon locking nut (1999 models) 402993
  • 407100 Back strap 18″ long (1999 models) 407100-02
  • 407100-01 u-bend pwr steering cooler

COOLANT BOTTLE RELOCATION BRKT ASSY

  • 407500-50 Coolant bottle relocation bracket 1
  • 407000-64 48″ 5/16″ hose, radiator overflow to coolant bottle 4ft
  • 407000-70 Spring clamps, overflow radiator hose 2

BYPASS VALVE ASSY

  • 407000-24 bosch bypass valve 1
  • 407000-62 36″-1.0″ ID rubber hose 3ft
  • 407500-33 hose clamp #12 narrow 4
  • 407000-08 SMR-bosch by pass valve adapter assy 1

FUSE BOX RELOCATION ASSY

  • 451070-4 flat head 10-32×3/4 2
  • 407000-30 fuse box relocation mounting bracket 1
  • 407000-31 fuse box mounting bracket (tear drop) 1
  • 407000-35 M6-1.0 x 20mm hhcs 1
  • 407000-42 10-32 nylock nuts 2
  • 402993 m6-1.0 nylock hex nut 1
  • 318110 m6 flat washer 1

MODIFIED OIL DRAIN BACK PLATE ASSY

  • 407000-06 modified oil drain back plate 1
  • 407500-26 hose clamps #10 narrow 2
  • 407000-32 blower oil drain back hose (HOSE NEEDS CUTTING 1

VACUUM LINE ASSY

  • 407500-28 vacuum tee 3/16″ 1
  • 503215-6 vacuum line 5/32″ ID 4ft

HARDWARE INTAKE TUBES ASSY

  • 318110 M6 Flat Washer 6
  • 402990 M6X1.0X25 mm Hex bolt 2
  • 402992 M6x1.0 HEX nuts 6
  • 407000-03 SMR intake charge tube, Max s/c 1
  • 407000-12 2.0″-3.0″ID silicon hose 2
  • 407000-13 Silicone hose, Black-90deg, supercharger to cross over tube 1
  • 407000-17 Aluminum spacers – stand off to valve cover 2
  • 407000-18 hose clamp #40-Supercharger to 90 deg. Hose 1
  • 407000-19 Hose Clamp #48 4
  • 407500-16 hose clamp #44 hard pipe/mas/throttle body 1
  • 407000-35 m6x1.0x20mm hhcs 6
  • 407000-78 SMR-air by pass adapter Max s/c 1
  • 318109 M6 lock washer 8

TUBE MAS TO THROTTLE BODY ASSY

  • 407000-79 SMR 90deg -3″OD tube to mas to throttle body 1
  • 407000-81 adapter -air temp sensor to 90deg tube 1
  • 407000-82 M4-0.7x12mm shcs-air temp sensor adapter mtg 2
  • 407000-83 viton o-ring air temp sensor adapter mtg 1

ASSOCIATED HARDWARE ASSY

  • 407500-06 m6-1.0x65mm hhcs s/c plate to engine 1
  • 407500-42 M6 stand off bolts s/c plate to engine 2
  • 407000-33 M10-1.5x60mm hhcs 2
  • 407000-34 M10 flat washer 2
  • 407000-35 M6-1.0 x 20mm hhcs 1
  • 407000-45 M6-1.0 x 55mm hhcs 1
  • 407000-46 M6-1.0 x 30mm hhcs 1
  • 407000-84 Cam sensor retainer 1
  • 407500-11 M8-1.25 x 25mm fhcs 1
  • 407500-12 M8-1.25 x 30mm flange hhcs 1
  • 407500-13 M6-1.0 x 20mm fhcs 1
  • 318109 M6 flat washer 2
  • 318110 M6 split lock washer 2
  • 400950-4 serrated spring washer 1
  • 407500-21 1/4-20 x1″ fhcs 2
  • 407500-37 foam insulation wrap 1-1/8 ID-1-1/4″ 1ft

DECAL ASSY

  • EO#D436-6 C.A.R.B. Decal 1
  • WARNING 92 Octane Label 1
  • STISUPER Stillen SuperCharge Decal 1
  • 100505 STILLEN SuperCharge Emblem 1

Assembly Person__________________________________
Date: / /
Sales Order #_____________________________________
Supercharger serial number:_________________________
Instruction sheet with pictures and schematics

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