3rd photo of pine needles laying on intake not helpful!
Engine diagnosis (4.7 Toyota)
- Thread starter wolfehunter
- Start date
It is an 06 Sequoia, not a show car
I got the spark plugs out tonight. 2 of them were super tight and one was rather loose. I got the camera down the cylinder and am thinking I see the electrode to the spark plug hanging in the one photo? Thoughts? And if it is how do I get it out? Is it caught on one of the valves possible? I am getting some flexible magnets but it looks like it is hanging in there so I think it’s a long shot. Keep in mind the vehicle was driven 10 miles after the spark plug blew out.
If that is indeed the electrode it could
Be imbedded in the piston. The image isn’t very clear. The plug prbbaly worked loose over time and combustion melted the coil. The oil could be from a leaking spark plug tube seal but could also be from cylinder damage.
You can either pull the head and inspect the damage, or repair the threads in the head, install a new spark plug and coil and see what happens.
Be imbedded in the piston. The image isn’t very clear. The plug prbbaly worked loose over time and combustion melted the coil. The oil could be from a leaking spark plug tube seal but could also be from cylinder damage.
You can either pull the head and inspect the damage, or repair the threads in the head, install a new spark plug and coil and see what happens.
I did repair the threads and have new plugs and coil ordered. It was difficult to get good pictures having limited space to work down the spark plug hole. Would be nice to be able to turn the camera on a right angle to see the cylinder walls and what the electrode is hanging on. Really don’t want to pull the head.
I tried to get some better photos but this is best I can do. Going to try a piece of insulated copper #12 wire and see if I can knock it loose somehow. Open to suggestions. Most likely gonna have to pull the head. Ugh!
I wouldn't take any action based on those photos, they're terrible. I'd install a plug in just that cylinder and turn a few revolutions by hand, then pull the plug and see if anything hit it (unlikely).
Then -- and I wish someone had already suggested this -- I'd remove the plug and run a compression check on that cylinder to see if the valves are fully seating.
If good compression, I'd put it back together and run it. Or buy a better borescope. We recently discussed ones that turn 180 and look back up at the valves. And it looks like you need adjustable brightness on your light.
Then -- and I wish someone had already suggested this -- I'd remove the plug and run a compression check on that cylinder to see if the valves are fully seating.
If good compression, I'd put it back together and run it. Or buy a better borescope. We recently discussed ones that turn 180 and look back up at the valves. And it looks like you need adjustable brightness on your light.
Start with a shop vac. Go from there. Ya never know...
Actually you can also fire it up with that plug removed to potentially blow out any debris, although if it's embedded in the piston that won't do anything.
Still, I don't think those pics are conclusive enough to think anything is embedded -- or not embedded.
As to @JeffKeryk 's suggestion, the Milwaukee Air Tip stuff is cool. There are less expensive options on Amazon, too, with adapters and lengths of small dia tubing
Still, I don't think those pics are conclusive enough to think anything is embedded -- or not embedded.
As to @JeffKeryk 's suggestion, the Milwaukee Air Tip stuff is cool. There are less expensive options on Amazon, too, with adapters and lengths of small dia tubing
I never used a camera like this and it just came today. I didn’t realize that it does have adjustable brightness and also a mirror I can attach to it that points up and away from the lens about 45 degrees when attached. Will try and get some better photos. Thanks for the suggestions. Will also give my shop vac a try.
Really appreciate the help on this. I might try and duct tape a rubber hose (fuel line) to my shop vac tomorrow after work. Should I be concerned about the oil laying in there? I never had a plug blow out before and am wondering if it is possible to have oil blow by the rings since the spark plug was dislodged. It was driven home about 10 miles after the plug blew out. Would the pressure or lack of it possibly be the cause of the oil?
JeffK, the shop vac trick with fuel line duct taped to it did the trick! I think it was a piece of the central electrode. Glad to get it out of there.
Going to replace all spark plugs and of course the burned coil. Rethreaded the spark plug threads in the head with a back tap threader tool that worked pretty slick. If it runs I plan to rent a compression test tool from Autozone and check compression in that cylinder. If all is ok I should probably change oil since raw fuel was most likely running into the oil on the 10 mile drive home after plug blew out. Clear codes with scanner. Did I miss anything?
Going to replace all spark plugs and of course the burned coil. Rethreaded the spark plug threads in the head with a back tap threader tool that worked pretty slick. If it runs I plan to rent a compression test tool from Autozone and check compression in that cylinder. If all is ok I should probably change oil since raw fuel was most likely running into the oil on the 10 mile drive home after plug blew out. Clear codes with scanner. Did I miss anything?
My 2V 4.6 spit a plug. I drove it like 40 miles (sounding terrible) before it occurred to me should unplug that injector. I don't remember now if I changed the oil immediately after.
In any event, it was fine (shrug). Also, basic compression testers are incredibly affordable and kinda handy to have. Small and easy to store.
In any event, it was fine (shrug). Also, basic compression testers are incredibly affordable and kinda handy to have. Small and easy to store.
You should use compressed air to blow out any remaining debris (e.g., metal tap shavings, excess oil/gas residue) in that cylinder before installing the new plug. Using a blow gun with a long extension tip will make that a simple task.
The blow guns like above annoy me as the extension is too large of a diameter. You gain volume but sacrifice pressure.
I prefer my OTC with smaller tube
otctools.com
That said, OP already vacuumed the bore. Typically suction is more successful than trying to blow out a blind hole.
I'd still leave that plug out and fire it up for a minute. It'll blow out anything else. This is SOP on Ford spark plug repair.
I prefer my OTC with smaller tube
Extended Reach Blow Gun | OTC Tools
The OTC 2422 Extended Reach Blow Gun is safe to use and you can easily control the air pressure from 50 PSI to 235 PSI.
otctools.com
That said, OP already vacuumed the bore. Typically suction is more successful than trying to blow out a blind hole.
I'd still leave that plug out and fire it up for a minute. It'll blow out anything else. This is SOP on Ford spark plug repair.
Nice, glad you got it our...i bet it runs fine with very little damage done. Would definately change oil.
