Hex cap on spark plugs?

Did you post specifically about the OP’s location? I don’t have a photographic memory. Just reply to the most recent posts is all . Same w/utube vdos, seldom watch the entire thing. I grab hold of the scroll bar with my mouse and move through utube vdo’s quickly that way.

There’s a blog writer in this area that I used to follow frequently when he was providing written blogs which I could skim thorugh quickly for any interesting tidbits, but when he switched to utube blogs, haven’t watched any of them. I doubt I’m alone.

Well I guess Nevada gets my $5. Put it on my account.

Once again taken down that primrose path. Picture of the spark plug, no rubber boot. Just the plug and the wrong socket. Sheesh.

Yeah I knew he was down under when he said it was 10:00 and too late to work on it. Fighting the kangaroos off.

Now back to the guy that can’t get the brake drum off. Not rusted supposedly.

yeah, that’s another perplexing thread …lol … … hopefully that drum has already been freed up days ago. Just as a personal interest thing, I find stuck brake drums more interesting than stuck spark plugs. One advantage the OP has in solving the spark plug problem, summer, long days and nice weather.

I’m still convinced there’s some kind of hex cap on top of the plug. Here’s another photo;
Screenshot_20231213_151628_Gallery~2

On all other plugs I’ve seen there’s just a dimple on top of the plug but in the photo you can see it’s a hex screw or cap of some sort. I even put a hex key down and it went into the hex head. I didn’t try tuning it as I was afraid it may snap or something. I’ve put the coilpack back and everything is fine. The car starts and runs as normal. Basically I’ve only just removed the coilpack, taken the photos and reinstalled the coilpack.

Have you put a socket on any other spark plug to see if it fits or feels any different???

No, but I’ve ordered a DEEP 14mm socket and will try extracting the spark plugs when it gets delivered.

1 Like

I have new coilpacks for my Hyundai Accent and the coilpack end is the same the Rav4…just a spring


So again I’m stumped as to what the hex cap/ screw is…on the plug.
This indicates that it’s the spark plug that has the hex cap/screw and nothing is missing from the coilpack .

Well, it seems got yourself a bit of puzzle there. Once you get the correct socket & a plug removed the answer will probably be obvious. Those caps on the tops of spark plugs generally screw off by hand, once you get them loose with a pair of slip joint pliers. Some HV spark lead attachment methods require the cap be removed, so maybe the manufacturer is trying to make that easier for their customers by providing an allen-key interface.

I still don’t see any manner of hex “cap” on the plug. It just looks like a typical deep-well plug. My guess is that the 14mm socket will cure the ills. But, you know. I always leave the door open for me being wrong about stuff. I’ll be happy to see a pic when one comes out.

1 Like

If you look at the very top of the plug, it looks like an allen wrench will fit in the center.
Capture

My guess is he doesn’t have a deep enough spark plug socket.

this is like ufo photos, one person says it was solid, rectangular and 30 feet long, another says it was transparent, cigar shaped and 300 feet long, there’s no way to know what it is … lol …

Yep that’s why eye witness testimony is always suspect. In suspense until the new socket comes in the mail.

I just hope the new regular 14mm deep well socket is deep enough to remove the spark plug… Time will tell since the OP will not try another plug to see what happens…

After leaving that rubber insert behind on a few occasions I now favor magnetic plug sockets. Absolutely recommend those for Subaru’s where a look down the spark plug tube is impossible.

Mechanics (or wife’s old compact) mirror works great…

Mechanics Mirror

Hate to dig an old thread up but…
Well, I wish the OP had of let us know what socket he bought…

My 2009 Vibe/Matrix takes the same SC20HR11 (3444) Denso spark plugs, and they are 14mm Hex (socket size) and long, so now I have to find a socket to buy and a few of the 10" long ones still say that the tip hits the magnet before the socket grabs the hex… Or bug a buddy to use theirs…
Anyway, I can confirm it is a 14MM hex…

Anyone have a part number from Amazon or local parts house that they can confirm fits??

My luck I would drop the plug walking through the parts store looking for a socket that will work and then I am out even more money… lol

The second socket from the right is a 14 mm Matco BD14M2SP, $15.
That socket fits SC20HR11.

2 Likes

The 12 point one?? It looks like that is about the only thing I have found so far, never been a big fan of 12 point sockets unless required, but I have to do what I have to do I guess…

The Snap-on one I found runs about $90.00, so Matco at $15.00 doesn’t hurt nearly as bad… Thank you for the info Nevada…

I’m with you there! For normal, everyday, non-problematic things it matters little. But when you need some serious a** give me the basic 6 point hex.

2 Likes