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Spark plug compressor fittings

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Keith_TX

02-11-2002 11:04:38

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Was out in West Texas this weekend working on a friends tractors getting ready for Cotton planting season, and he told me that he used to have a fitting that you screwed into a spark plug hole in the head of your car engine that would allow you to use the engine for a compressor. Has anyone else seen these?

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EngineAire . . . Dell (WA)

02-12-2002 14:13:15

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Re: Spark plug compressor fittings in reply to Keith_TX, 02-11-2002 11:04:38

Mine is by a company called "EngineAire" and screws into sparkplug. Doesn't suck gas from carb. Lotta off-road guys use'em. Ford used to sell'em as accessory for 8N's. Look in JC Whitney..... ...Dell

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kevin

02-12-2002 04:15:58

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Re: Spark plug compressor fittings in reply to Keith_TX, 02-11-2002 11:04:38

I've got a set, bought from snap-on man years ago, was intended for holding valves up, to change valve seal's with out taking the head off. pressurised the combustion chamber with air.

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olddog

02-12-2002 02:25:07

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Re: Spark plug compressor fittings in reply to Keith_TX, 02-11-2002 11:04:38

remember using one of these somewhere, but: more remember my uncles MM in the early 60's used a pump that fit on the PTO , was chained and rested on the platform underneath, to pump tires. Anyone seen these lately?

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Glenn(WV)

02-11-2002 19:36:07

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Re: Spark plug compressor fittings in reply to Keith_TX, 02-11-2002 11:04:38

I've seen them, and I have such a beast. I haven't used it, though. IH offered them as an option for some of their tractors, like my Farmall 100. I picked up a nearly complete kit(includes valve cores, tools, etc.) on eBay for about $60. The gentleman who put it up for auction told me he picked up two of the kits at a sale. I did have occasion to use one of the cores to replace a leaky core, and even after 40+ years the replacement core sealed 'er right up!

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Pete

02-11-2002 16:06:21

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Re: Spark plug compressor fittings in reply to Keith_TX, 02-11-2002 11:04:38

I often see these for sale on ebay. I bought mine there a while back. They work OK. If you make one yourself, you need to use 2 check valves, unless you want to pump a gas-air mixture into your tire! On the intake stroke of the piston you want a check valve to open, breaking the carb suction of gas/air and instead suck fresh air through the check valve. While sucking the fresh air you also don't want the air already in the tire to come back out...so use another check valve.

Pete

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Steven@nd

02-11-2002 12:29:44

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Re: Spark plug compressor fittings in reply to Keith_TX, 02-11-2002 11:04:38

Why don't you make one?? Just weld a check valve and hose fitting on an old spark plug. All you have to do is break the porcelain out and gut it.

Steven

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Rod (NH)

02-11-2002 15:21:54

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Re: Re: Spark plug compressor fittings in reply to Steven@nd, 02-11-2002 12:29:44

Now that IS a way to get some combustible mixture into your tires!

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Steven@nd

02-12-2002 12:33:05

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Re: Re: Re: Spark plug compressor fittings in reply to Rod (NH), 02-11-2002 15:21:54

Have you started many tires on fire lately? I doubt it would make a combustible mix. There would be too much condensation inside the tube, and also the fuel would not be atomized by the time it got through the hose.

Better things to worry about in the world than that.
Steven

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Greaseman

02-11-2002 12:21:12

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Re: Spark plug compressor fittings in reply to Keith_TX, 02-11-2002 11:04:38

If any body knows where you can get one, please let me know. Thankyou.

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Keith Morris

02-11-2002 13:39:39

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Re: Re: Spark plug compressor fittings in reply to Greaseman, 02-11-2002 12:21:12

Most of the auto parts stores around here carry them and wal-mart to. better to just buy a 12 volt compresser and use it a lot less trouble. or you can try J C whitney. at jcwhitney.com

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Rod (NH)

02-11-2002 15:17:59

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Re: Re: Re: Spark plug compressor fittings in reply to Keith Morris, 02-11-2002 13:39:39

Crankstart B with mag = no battery!

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Rod (NH)

02-11-2002 12:13:31

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Re: Spark plug compressor fittings in reply to Keith_TX, 02-11-2002 11:04:38

Here's a photo of one. I use it with my AC B for pumping up a tire when not near a regular compressor. It works fine. No, there is no combustible mixture put into the tire. There is a ball check to prevent air in the tire backfeeding and also some kind of rubber flapper check behind the side openings that permit fresh air to be introduced into the fitting prior to compressing and pushing down the line to the tire. The air flow is intermittent depending on engine speed...something like a very fast hand pump. I don't think it would be suitable for much more than pumping up tires. A neat little tool from the past.

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Keith_TX

02-12-2002 11:34:26

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Re: Re: Spark plug compressor fittings in reply to Rod (NH), 02-11-2002 12:13:31

Thanks for the photo...but I have to ask.....I understand the threaded end, that is easy. BUT, why does the business end look like a spark plug? How would I attach an airhose to what appears to be the tip of a spark plug?

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Rod (NH)

02-12-2002 13:23:51

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Re: Re: Re: Spark plug compressor fittings in reply to Keith_TX, 02-12-2002 11:34:26

The end that appears to be the tip of a spark plug is actually just a barbed fitting for attaching an air hose (0.25" ID hose I think). It's hollow...you just can't see the opening from the angle of the photo. Just push the hose over the barbs and install a hose clamp.

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Keith

02-13-2002 06:31:38

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Re: Re: Re: Re: Spark plug compressor fittings in reply to Rod (NH), 02-12-2002 13:23:51

THANKS ROD!

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Zira

02-11-2002 16:04:57

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Re: Re: Spark plug compressor fittings in reply to Rod (NH), 02-11-2002 12:13:31

So how does it not pump gas/air mixture into the tire? I know these were common way back when, but it does seem rather explosive...

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Rod (NH)

02-11-2002 16:50:40

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Re: Re: Re: Spark plug compressor fittings in reply to Zira, 02-11-2002 16:04:57

Fresh, ambient air is drawn into the cylinder (during the intake stroke) through the slotted side openings of the fitting. Behind those openings there is a rubber flapper that acts as a check valve across the openings...this forces the air down the hose to the tire, rather than back out the openings, during the compression stroke. See also the good explanation in the post by Pete above.

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T_Bone

02-11-2002 17:38:00

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Re: Re: Re: Re: Spark plug compressor fittings in reply to Rod (NH), 02-11-2002 16:50:40

Rod hit the nail on the way they work. I've used them in the past and there ok but a 12v pump works much better but the spark plug is much faster for air up.

I still have mine but I don't know where and I ain't lookin for it! LOL

T_Bone

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Halsey Green

02-11-2002 11:10:23

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Re: Spark plug compressor fittings in reply to Keith_TX, 02-11-2002 11:04:38

I recall it being around in the late 70's. A friend had one for his Jeep. Don't every recall him using it. Not sure if it pumped air straight from the cylinder or not, but if it did, that would be some explosive mixture in the tire.

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Old Mechanic

02-11-2002 22:34:07

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Re: Re: Spark plug compressor fittings in reply to Halsey Green, 02-11-2002 11:10:23

They were very popular in the 50's and had a valve built into the plug adapter that allowed air and not a air/fuel mix in the tire. Don't know if they are even still made. As far as fuel mix in tire, here in Oklahoma and North Texas a lot of farmers use propane to air tires up and run impact wrenchs. Most of the older farm pickups use it for fuel also so it is always there to use for air. Never heard of any problems using it around here.

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Red Dave

02-11-2002 11:34:09

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Re: Re: Spark plug compressor fittings in reply to Halsey Green, 02-11-2002 11:10:23

I've seen those things and I had the same thought about the mixture. It would have to have fuel dispersed in the air. I guess you wouldn't want any tire filled that way to spring a leak near an ignition source.

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Roger

02-11-2002 16:39:37

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Re: Re: Re: Spark plug compressor fittings in reply to Red Dave, 02-11-2002 11:34:09

That's a quick way to find a slow leak...

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Match Test Right?

02-14-2002 19:50:45

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Re: Re: Re: Re: Spark plug compressor fittings in reply to Roger, 02-11-2002 16:39:37

Yeh, then you could use a match test,
Just be carful you don't end up like Sylvester the Cat. Works for propane too.
LOL
GG

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