How far can you submerge a cruiser?

I would just check the levels and examine the fluid, to be sure water has not entered.
Any advice on the best way to check the level and fluid? Pull the the breather plug or the filler plug and just stick a finger in there and see what comes out?
 
Any advice on the best way to check the level and fluid? Pull the the breather plug or the filler plug and just stick a finger in there and see what comes out?
Filler plug, and the level of the fluid should be even with the bottom of the opening. Any higher, and there could be water at the bottom. Also, if coming in from a drive (preferably short), insure the fluid is relatively clear, not milky. If the fluid is hot, it could be a tad above even with bottom of the filler plug opening, but not to worry.
 
From the Japan catalog (translated by Google): 700mm.

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I would think diesel and hybrid have different depths. I saw a video with factory LC 250 close to 700mm, but it was diesel. Diff relocation + hybrid - would be good to get a depth. I drove my diesel 105 series Landcruiser up to window.
 
There are flapper vents in the rear quarter panels underneath the bumper trim, easy spot for water to come in at.

I had a dodge Dakota a long time ago with 6" lift that I drove up the windows, auto trans vent at top of firewall sucked in mud. Took 45 gallons of trans fluid and 3 filters to clear the transmission while flushing, drove it 29 miles with that mud in it (not knowing) and drove it another 35K without issue afterwards before selling.
 
FJ was the last Toyota model published with a fording depth. We were just talking about this in the office the other day.
 
lol well as somebody who sometimes bites off more than he can chew, ahem, maybe flooded my Tacoma twice with water over the seat bottoms, and having now moved to Houston where the possibility of driving through feet of water is very real… I was just curious if there was any real info on not only what Toyota recommends which is always wildly conservative vs. what real world experiences people have. Specifically concerning the fact that the hybrid battery getting wet would be critically bad. Would it take a full submersion? Is it possible that just an extended river crossing with water up to the frame could be enough to kill it? This is a very capable off road vehicle so I feel like if there’s the potential to completely disable the truck in a relatively normal scenario, it would be great to know lol
 
lol well as somebody who sometimes bites off more than he can chew, ahem, maybe flooded my Tacoma twice with water over the seat bottoms, and having now moved to Houston where the possibility of driving through feet of water is very real… I was just curious if there was any real info on not only what Toyota recommends which is always wildly conservative vs. what real world experiences people have. Specifically concerning the fact that the hybrid battery getting wet would be critically bad. Would it take a full submersion? Is it possible that just an extended river crossing with water up to the frame could be enough to kill it? This is a very capable off road vehicle so I feel like if there’s the potential to completely disable the truck in a relatively normal scenario, it would be great to know lol
I recall seeing 70cm as the official number.
 
lol well as somebody who sometimes bites off more than he can chew, ahem, maybe flooded my Tacoma twice with water over the seat bottoms, and having now moved to Houston where the possibility of driving through feet of water is very real… I was just curious if there was any real info on not only what Toyota recommends which is always wildly conservative vs. what real world experiences people have. Specifically concerning the fact that the hybrid battery getting wet would be critically bad. Would it take a full submersion? Is it possible that just an extended river crossing with water up to the frame could be enough to kill it? This is a very capable off road vehicle so I feel like if there’s the potential to completely disable the truck in a relatively normal scenario, it would be great to know lol
I can't completely answer your question......... but as you found out with your winch install, a short in the 12V system will effectively kill the thing. While DC normally does ok with water, all the components in the DC to DC converter won't............... in Post #11 it looks like the OEM height of the rear bumper.
 
I know we’ve covered this, but I guess my next question would be, is there a way that we can mitigate water ingress from the bottom up. I wholeheartedly agree that lower bumper is a safe limit, but are there ingress points directly to the battery? I’ve pulled out the “cubby’s” that sit in front of the battery (behind the back seats, and there is definitely no water protection there, but it would be good to know if that is truly the only spot, so we can all know that “water in cab=bad”. But if it’s possible to have ingress at even the lower bumper level, it would be good to know. I’ve pulled off the spare and looked at what in could, but I can’t be sure I saw everything, and I can’t pull the battery out. Perhaps I can go down the rabbit hole with Toyota techs to see if there is seals or grommets or whatever under there.
 
The flapper vents under the rear sides of the bumpers are the largest area for water to come in, another spot is one of the plastic push pins for the rear fender flares actually goes through to the interior of the vehicle (rear side of rear flare), the rest do not, not sure why Toyota did that?

I saw the push pin hole when I pulled the rear fender flare and liner while I was doing my winch pre-wire and running cables to the engine bay battery posts I installed, sorry I didn't get a picture of it.

Can't really do anything about the flapper vents, this is likely why Toyota set the level where they did as they are just above that, you can see them in this video at the start along with the round push pin hole (first one above the front most upper bumper push pin square hole) that also goes through to the inside. Looks like the square one may also go through

 
The hybrid battery metal cover is just that, a cover not sealed by any stretch of the imagination. The main hybrid battery disconnect is a fancy "anderson" connector, insulated but not sealed. I guess you could install a plastic tub and place the entire battery enclosure in the tub, that would give you an additional 4-5 inches of water proofness, but there are some many modules/fans/connections/fuses and relays behind the cargo trims panels and as sensitive as the LC 12v system is............. it would never function correctly again.

You could probably get away with a very quick dip but a sustained water crossing ........ "juice might not be worth the squeeze".
 
Not worth it IMHO, also run the risk of crossing the HV system to the 12V system which would likely kill allot of modules resulting in an insurance total.

Also electric shock potential if you start flooding the floor.

Someone on the Facebook group awhile back killed there 250 in water, never saw any update as final verdict though. I believe the water came in through the flapper vents IIRC?
 
This picture came with my lift from Dobinsons.

IMG_4582.jpeg
 
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