New toy for my LS400 ucf20: Air Zenith OB2 air compressor

Air Zenith OB2 air compressor

Air Zenith OB2 air compressor

My Airrunner/ACC compressor (which is really made by Firestone for the load-levelling air spring kits) started going out the other day. I noticed it was slowly leaking air, from the tank, through the feed hose, and out from the compressor ‘inlet’ port. I assume the internal check valve bit the dust.. Vegas heat, vibration, age and a suboptimal air system probably all helped lead to it’s demise.

After doing some research, I decided to replace my ailing compressor with a new unit from Air-Zenith, their OB2 model. Lucky for me, Air-Zenith is actually based out of Las Vegas. Their main office is about 20 minutes from Mellos VIP garage! I stopped by and chatted with Manager Paul Chen and picked up this black-flaked-painted whopper of a compressor. The specs on the unit? 200PSI @ 100% duty cycle. About a foot long and 6 inches tall, must weigh a good 20 pounds at least! The wiring is very beefy, all the ends are terminated properly and the wires themselves are surrounded by thick protective shielding and heat-shrink at the terminals. The unit has a built in fan to help keep the unit cool (ever grabbed your compressor mid-tank fill? Bet you never do that again!!). The internal pump piston is completely rebuildable, and the unit features a remote mountable inlet filter. The product packaging was excellent as well! If first impressions mean anything, I have very high expectations for this unit.

I did a basic install in my LS400 to get the car back on the road, although I’m planning to completely revise the setup in the near future (Can you say, ELECTRIC VALVES?). In a few days I’ll put up a more detailed post with lots of photos for you to check out!

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UCF20 LS400 Bulb part numbers

I’m on a mission to replace all/most-of the halogen bulbs on my LS400 with LED bulbs. The first part of the quest is to identify the halogen bulb part numbers, to be able to look up replacement LED bulbs. I found the following list on Sylvania.com (click products->automotive products->replacement guide), figured this might be helpful for other UCF20 owners looking to do LED retrofits.

2000 LEXUS LS400 (With HID (high intensity discharge) headlamps)
Low beam headlamp
HID-D2R

High beam headlamp
9005
9005SU Silverstar ULTRA for Ultra Night Vision – The Whitest and Brightest Halogen
9005ST Silverstar High Performance Lighting: The Whiter and Brighter Halogen
9005EB EcoBright – Your Environmental Choice
9005XV XtraVision Halogen – The Brighter Light
9005CB Cool Blue Halogen – The Whiter Light

Parking light
2825
2825LL Long Life Upgrade: Up to twice the life of the standard lamp

Front turn signal
7440
7440ST Silverstar Signal Lighting: Complete the Look: Crisp, Clean, Style
7440LL Long Life Upgrade: Up to twice the life of the standard lamp

Rear turn signal
7440
7440ST Silverstar Signal Lighting: Complete the Look: Crisp, Clean, Style
7440LL Long Life Upgrade: Up to twice the life of the standard lamp

Tail light
7443

Stop light
7443

High mount stop light
921
921ST Silverstar Signal Lighting: Complete the Look: Crisp, Clean, Style
921LL Long Life Upgrade: Up to twice the life of the standard lamp

Fog/Driving light
9006
9006SU Silverstar ULTRA for Ultra Night Vision – The Whitest and Brightest Halogen
9006ST Silverstar High Performance Lighting: The Whiter and Brighter Halogen
9006EB EcoBright – Your Environmental Choice
9006XV XtraVision Halogen – The Brighter Light
9006CB Cool Blue Halogen – The Whiter Light

License plate
2825
2825LL Long Life Upgrade: Up to twice the life of the standard lamp

Back up light
7440
7440ST Silverstar Signal Lighting: Complete the Look: Crisp, Clean, Style
7440LL Long Life Upgrade: Up to twice the life of the standard lamp

Front sidemarker
2825
2825LL Long Life Upgrade: Up to twice the life of the standard lamp

Rear sidemarker
2825
2825LL Long Life Upgrade: Up to twice the life of the standard lamp

Glove box
37

Step/Courtesy light
194
194LL Long Life Upgrade: Up to twice the life of the standard lamp
74
DE3021

Trunk/Cargo area
194
194LL Long Life Upgrade: Up to twice the life of the standard lamp

Instrument-general
194
194LL Long Life Upgrade: Up to twice the life of the standard lamp

My LS400 up at Mt. Charleston

Took the LS400 for a drive up to Mount Charleston today (8437 ft).

My LS400 up on Mt. Charleston (dirtyyyy)

My LS400 up on Mt. Charleston (dirtyyyy)

It was desperately in need of a bath, so after I got home I spent 3 or 4 hours on it on a simple/half-ass detail. Gold Class wash, Dried with super soft microfiber towel + compressed air, a little Ultimate Quick Detailer, Quick Interior Detailer and Stoners Invisible Glass. It has alot of minor holograms from the P/O and a few light scratches that need work; in a few weeks I’ll try to get together enough equipment and supplies to polish and wax it properly.

Air Suspension – My Airrunner setup and system plans

I posted this up on the Club Lexus forum recently and thought it would be useful here also.

I have an Airrunner air suspension setup on my 2000 LS400. It’s a nice system but I have a couple minor issues with it. I run the fronts around 110psi and the rears around 60psi on nice pavement, 120/80 on rough/uneven surfaces.

Full up:

My LS400 - Nearly full inflation

My LS400 - Nearly full inflation

Laid out:

My LS400 - Laid out 1

My LS400 - Laid out 1

My LS400 - Laid out 2

My LS400 - Laid out 2

My LS400 - Laid out 3

My LS400 - Laid out 3

Setup:

  • Two tanks. Not sure exact size, 5? gal each
  • Single 120psi Airruner branded Firestone compressor
  • 1/4 line to 4 manual switches and 1/4 line to bags/cylinders
  • Dual pressure gauges (and switches) mounted in center console.

Sry no picture of the trunk for now, but it’s nothing special, tanks and comps in spare tire well.

Thoughts
My main gripe is how slow the current setup is to lift the car (and deflate the rear). This is from the 1/4 lines. Slightly annoying while driving and need to quickly lift the car, but it’s more annoying when the car is laid out and you need to go back to ride height. Due to the install, my manual switch placement sucks – they are hard to get at in the center console. For those that don’t know, manual switches dump the air from the bags right out of the switch itself, so as you’d expect it’s very loud in the car when deflating… My GF and kid complain. Of course the manual valves have no way to program preset heights, or auto fill on startup, both features I’d really like. Lastly, the single 120 compressor is taxxed to fill both tanks, it will run for >= 10+ minutes after lifting the car off the floor. If the tank was low/empty when laid out, you have to wait awhile before being able to drive anywhere. But other than these minor, correctable issues, the Airrunner setup is awesome.

Plans
I’m planning to upgrade to the system to

  1. Make it faster and easier to use (programmable heights)
  2. Make it quieter inside the cabin (and louder outside the car)
  3. Provide a little redundancy AND reduce tank recovery times.
  • Upgrading compressor to either a single or dual Viair 480C compressor, they’re good for 200psi@50%duty. Much faster tank recovery!
  • Upgrading to at least 1/2 line from the tank to the manifold/valves. The single 1/4 line from the tanks is over taxxed when filling 2 or 4 bags at once
  • Upgrading to trunk mount electric valve setup (Accuair?) with slow-downs/mufflers on exhaust ports. Quieter cabin, and allows presets with controller
  • Upgrading to programmable digital controller, still researching but leaning toward the Autoloc Air Command
  • Get rid of analog gauges in favor for a digital display setup that also shows tank pressure
  • Keeping 1/4″ lines from valves to struts, if the new setup still isn’t fast enough I’ll sell the Airrunners and go with a custom UAS setup with >= 3/8 lines
  • Haven’t planned out what to do for water traps or drains, but that stuff along with fittings and air hose is fairly generic

Hope this helped!

Lexus serpentine belt

The serpentine belt on my LS400 looks like it has some small cracks, probably due to the heat, lack of driving and just old age. The car has nearly 111k on it, supposedly the 90k timing belt change was done. However, wouldn’t you think to replace the main serpentine belt at the same time? I doubt this belt has been changed only 20k miles ago…

While searching for a replacement serpentine belt, I came across this random PDF doc that lists (every) 1990-2007 Lexus along with the serpentine belt #. List includes LS400/LS430, GS400/GS300, SC300/SC400, RX330, LX470, ES300, etc.

2000 LS400
V8 4.0L F.I. Eng.
Multiple Accessory , ALL 875K6

LS400 Air suspension – compressor issue

Annoying…. Driving home, need to raise the nose of the car so it doesn’t drag the bumper through this intersection they’re working on. Press the switches, and… Nothing. Seems like the tanks are empty and the compressor isn’t kicking on.

When I got home I checked the fuses first, but they were fine. Quickly checked the wiring in the trunk, everything seemed okay, no shorts, burns, smoke, etc. I figured the tank pressure switch wasn’t working anymore, but a quick test with my DMM said otherwise. The only things left were the relay and the compressor itself. I cut the pump wiring and tested the pump straight off my s13 optima battery — luckily it worked fine… Strangely after I put the wiring back, the relay worked fine too. I really hate intermittent problems. I’m guessing that it was either a poor ground issue (and the relay wasn’t kicking on), or some sort of thermal issue with the relay or compressor. Hope this issue doesn’t come up again!

I’m planning to upgrade to a digital controller and electric solenoids soon, as well as a complete trunk rewire.