Leeper

If it's just debris your method should hopefully yield good results. If it is the valve your looking at removing and servicing the head

Margate330

Please keep us posted friend

Did the seafoam clean stuff up so you can see better?
I wish there was a work around hack to replace the valve without pulling the cylinder head.

offroadtrd

Right its on hibernation with MMO & we will see. If it comes to the time to remove engine, i am thinking if its possible at all to 1st disconnect the exhaust manifold & try to access the exhaust valve & see if it moves....

Mesquite77

Glad to see you making progress OP, here is a thread about replacing valve springs (2GR-FE) while engine in car (if valve is not stuck or damaged, and valve guide is not damaged):
https://www.toyotanation.com/threads...der-3.1761757/

fortitude

starts around the 4 minute mark
Amazing product based on video.

Leeper

Good video thanks for posting. Car Wizard knows his stuff

Fingers crossed OP is lucky enough to have this resolve his issue

Margate330

Ok, this is odd.

I'm posting on this thread about this engine with you all and on my TV last night >out of the clear blue< YouTube recommends me 2gr engine videos.

I'm feeling a little stalked by youtube right now. Lol

Anyway, I watched a video on a 2gr engine failure and the man warned NOT to let a machine shop resurface the heads on these motors. He said if the heads do need to be resurfaced, buy a good head and junk the old one. Reason why is supposedly shaving the head to clean it up just a tiny bit will throw phantom cam code errors that can never be resolved due to the precise distancing of everything. He said use nothing more than scotch Brite to clean the head and engine mating surfaces.

Wow, that's some tight precision on these engines.

offroadtrd

LOL Its all about your gadgets following your actions....
I blv you watched Carcarenut say that not to machine head due to timing errors would crop up...these 2gr engines are made with very fine tolerance i blv.

offroadtrd

Here is a quick update...After almost 3 days of MMO soaking, i checked with boroscope only to find there was no liquid on top of that cyl 3. ?? I put back everything & started. It started and ran fine without any misfire...really stumped. I ran on idle for about 40 mins hoping it to clear the piston n cylinders. I turned it off & restarted the misfire came back on cyl 3. I am gonna open again tomorrow to see the valve on cyl 3 & also check for the compression, if there is an improvement i would be blessed. Over all the engine ran a bit smoother than before i would say.

offroadtrd

Thank you so much for bringing this thread Mesquite, i think i can see the reason for the marks on my cyl 3 piston top being from the valve thats loose & dropping as per the thread...Makes a lot of sense.
"That means when timing is out of wreck, your valves will not kiss your pistons.
But when a spring breaks and the valve drops below its normal lowest position, your valve COULD STILL kiss the piston."

Mesquite77

In the link above some posts get it wrong about the 2GR-FE, it is an interference engine. If you remove the timing chain, do not rotate the crank, a piston will hit a valve.

offroadtrd

Havent taken the engine out yet, here is a boroscope video that i made that shows the struck valve. Your thoughts appreciated. Sorry for the slow video at times as my daughter was turning the wrench & socket was coming off the crank pulley while i was capturing. At 4:11 you will see 1 valve is stationary, whereas at 3:00 you will see the other 2 valves function properly.

Mesquite77

Yah, that valve is stuck, likely bent, that engine is coming out. If valve guide is not cracked you can likely get away with just replacing the valve.

I bet the spring is broken, because when that happens, the little "hat" that sits on top of the valve stem and rocker arm falls off, so the valve will not extend as much as the others, which is what your (nice btw) video is showing.

Margate330

How in the hell did you get these awesome shots?

I bought a boroscope from harbor freight to play around and have a look on my engine for carbon build up but I wasn't able to get these angles.

I returned it because it was basically useless.
At the time harbor freight did have a couple different boroscopes for sale so maybe I bought the junky one.

offroadtrd

It was shot with this 4K boroscope from amazon suggested by Carecarenut guy in youtube..
Here is another one that he suggested in another video...