I'm a little confused myself, I was just within another thread @2001LC stated the tubes were necessary.
^^^Not something I said^^^
Tube seal and spark plug seals are two different things.
Spark plug seal (metal crush washers), are on new spark plugs. If we remove sparks plug to inspect and clean. We can reuse plug, but its "crush washer" has already been crushed. So they not seal as well second time. But will be good enough.
Spark plug tube seal. Can be seen when, coil removed. We see it between head cover and spark plug tube. These are only replaceable, when head cover removed. Which I rarely, remove head cover to replaces its gasket/seal. I re-torque head cover bolt to 54INCH-lbf, instead. One day re-torque, will not work. But until that day, I just re-torque. So far only head cover gaskets and tube seals, I've removed & replaced (R&R). Are those someone R&R before I touch vehicle, doing a poor job so they leak. Most of those were non OEM seals.
Coil seal(s) are on top of coil. Which I replace often. They seal gap between top of coil and head cover, with boot on bottom of coil that fits over spark plug as coil installed. The top seal, keeps dust/sand & water out of spark plug tubes. We replace this seal and boot, when we replace spark plugs, if needed. Which if more than 10 years old, they usually do need R&R
TICK TICK TICK POP POP POP is a ticking time bomb, often mistaken as exhaust manifold crack or gasket leak leak.
ALERT, ALERT, ALERT: Spark plugs are working themselves loose. "Walking Out" Then blowing out of head, taking their female threads of head with them! Very damaging!
You think TICK or POP, is blown exhaust gasket or crack exhaust manifold. Replace the spark plugs. If tick doesn't go away, then you've confirm exhaust leak. Exhaust leaks anywhere need to be taken care of. But they're less damaging if damaging at all. But, if you blow...
From what I can tell, the spark plug thing is in his wheel- house for sure.
I guess what I'm not sure on, is the washers... do those need to be swapped out as well.
Anybody know the part number for the Tube seals? I had conflicting numbers.
You'll not likely need.
I suggest you get out of habit, of asking for part numbers (P/N). It a bad practice on mud. We have many variation of the 100 series, just in USA. LX470 & Land cruiser. 98-99, early 2000, late 200 -2002, 03, 04-05, 06-07. Even within those we variations in parts. They're are few times I'll give P/Ns, but those are the difficult ones to find or a sub the forum has found.
Use your VIN at
www.partsouq.com. You'll see your vehicle even color. Great diagrams.
