air compressor , mounted underhood

VBdiver

New member
i'm sure this has been done before .
got tired of air compressor taking up space in rear so I mounted it in engine compartment . inexpensive a/comp I got from Pep Boys a few years ago . does a good job airing up tires after the beach (portable tanks work much faster but eats up space).
parts used: 2 heavy duty cable straps , 2 strips 1" x 2" foam rubber , cigarette lighter plug with rubber cover (marine type), inline fuse holder .
mounted a/comp next to a/c filter box with 2 cable straps through existing holes on plate next to power steering reservoir , used rubber strips doubled over to keep sharp metal edges from digging into straps. the compressor has rubber feet to isolate vibrations & I did not have to over tighten straps to keep unit in place. ran the power cord through horn area . installed cig lighter plug on existing tapped hole aft of the fuse box on side wall. ran positive lead with inline fuse (15amp) to bolt on positive battery cable , ran ground wire to ground wire of battery on sidewall.
the rubber cap keeps dirt & water out of plug area & compressor plug has it's own sheath to cover contacts when not in use . for safety sake I did not hard wire the unit or leave it plugged in.
the air hose will reach the farthest wheel LR & has a threaded fitting so you don't have to hold it on the valve stem.
air hose is stowed in rear with the jack . the hose is plastic & I don't think it would fair well left under the hood with all that heat.
took about 15min to hook it all up.
 

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Pinstripe

Nice install!!! I noticed the pinstripe on your rig, which I never really liked on any vehicle I've had but that little toyota symbol is cool. Was it installed at the dealer?
 
Nice install!!! I noticed the pinstripe on your rig, which I never really liked on any vehicle I've had but that little toyota symbol is cool. Was it installed at the dealer?

Thanks !

I think the dealer did install pinstripe ? btw how does one know , would there be a charge for it on delivery ?
 
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Great post and pictures! I was looking to do the same thing with the VIAIR 90P. I was worried about the heat of the engine, but if this is not a concern, I'm ordering the 90P tonight!
Amazon.com: VIAIR 90P Portable Compressor: Automotive

Also will this hose be compatible with the 90P? :hungry:
Amazon.com: Viair 00025 5 In 1 Deflator/Inflator with 25' Extension Coil Hose: Automotive

I literally just received a 450P in the mail yesterday (Amazon.com: VIAIR 450P Automatic Function Portable Compressor: Automotive). I had a chance to play with it a bit this afternoon, and I'll do a write-up in a bit.
 
Great cost effective method. I too have the same pep boys special that I've used more than a few times. Worked well and was not too painfully slow from 20 to 42 psi
 
Great post and pictures! I was looking to do the same thing with the VIAIR 90P. I was worried about the heat of the engine, but if this is not a concern, I'm ordering the 90P tonight!
Amazon.com: VIAIR 90P Portable Compressor: Automotive

Also will this hose be compatible with the 90P? :hungry:
Amazon.com: Viair 00025 5 In 1 Deflator/Inflator with 25' Extension Coil Hose: Automotive
I would highly suggest the orange rubber ARB air lines over the plastic ViAir ones . I had the ViAir and it gradually split near the end. Threw it away in Arizona it was leaking so bad and bought the ARB. It's a little more money but alot higher quality and you get what you pay for. .......http://store.arbusa.com/TIRE-INFLATION-KIT-FOR-ARB-AIR-COMPRESSORS-171302-P21322.aspx
 
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Seems that you may not have a 25 footer. The OVERALL length of our 4 runners is 15.8 feet. And the OVERALL width is 6.3 feet. Assuming that your compressor is installed inside the engine compartment against the driver's side inner wheel fender, at least 2 feet or so from the furthest point of your front bumper, you can subtract at least 2 feet in length and another foot in width. Then, subtract at least 2 feet from the rear of the rear bumper to the tire inflation valve. In other words, you should be no more then 15 or 16 feet from your compressor to the rear passenger wheel.

Maybe it is the tight coil of the hose which causes you to loose length?

Length 189.9 in (4,823 mm) =15.833 Ft
Width 75.8 in (1,925 mm) =6.316 Ft
 
Seems that you may not have a 25 footer. The OVERALL length of our 4 runners is 15.8 feet. And the OVERALL width is 6.3 feet. Assuming that your compressor is installed inside the engine compartment against the driver's side inner wheel fender, at least 2 feet or so from the furthest point of your front bumper, you can subtract at least 2 feet in length and another foot in width. Then, subtract at least 2 feet from the rear of the rear bumper to the tire inflation valve. In other words, you should be no more then 15 or 16 feet from your compressor to the rear passenger wheel.

Maybe it is the tight coil of the hose which causes you to loose length?

Length 189.9 in (4,823 mm) =15.833 Ft
Width 75.8 in (1,925 mm) =6.316 Ft

You may be right because my compressor isn't even installed. I have it sitting on the ground and it's a stretch.
 
You may be right because my compressor isn't even installed. I have it sitting on the ground and it's a stretch.

Sorry, I was looking at another site, then made my post here.....if yours is on the ground and you still have a problem....then yea, I think your hose is way too short! Be safe.
 
Sorry, I was looking at another site, then made my post here.....if yours is on the ground and you still have a problem....then yea, I think your hose is way too short! Be safe.

no sweat, I have a 30 footer that I use when I use the beaches air fill stations, ill see if the couplings are the same. I plan on doing this mod (just putting it in the engine bay, and using the alligator clips for the power) this weekend.
 
OP - Thanks for the detailed instructions. I completed this mod today. I almost paid $100 for a compressor, but looked up the one you used and saw it was $20. Decided to give it a shot and it seems to work just fine. I already have a heavy duty compressor at home, so no need to splurge on another one when this one is good enough for inflating a spare or a basketball when away from home.

MasterFlow Cyclone MF-1040 Portable 12 Volt Air Compressor | Product Details | Pep Boys

Thought I'd share this. My local pepboys has a coupon for $20 off $100 that you print off the pepboys website. So I picked up 5 of these for $80 + tax. I think these make pretty good stocking stuffers so the other 4 are going to the fam for Christmas.
 
OP - Thanks for the detailed instructions. I completed this mod today. I almost paid $100 for a compressor, but looked up the one you used and saw it was $20. Decided to give it a shot and it seems to work just fine. I already have a heavy duty compressor at home, so no need to splurge on another one when this one is good enough for inflating a spare or a basketball when away from home.

MasterFlow Cyclone MF-1040 Portable 12 Volt Air Compressor | Product Details | Pep Boys

Thought I'd share this. My local pepboys has a coupon for $20 off $100 that you print off the pepboys website. So I picked up 5 of these for $80 + tax. I think these make pretty good stocking stuffers so the other 4 are going to the fam for Christmas.

i'm thinking about getting this one.. i may not even mount it.. but wouldn't be a bad idea to do so up in the engine bay
 

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