Rear windshield washer

[steffan]

'93 Landcruiser, rear window washer over the last couple of years slowed down to a drizzle and the finely stopped. I figured it was time for a new diverted valve so called Beno and got one in, swapped it out. No dice, still no flow on the rear window. So I start pulling hoses and try blowing compressed air in the line and still no dice. Then I get some thin wire cable and start running it down the line. I find all the junctions and work my way back towards the rear to where it stops. Then I try working backwards from the rear washer with the cable. I find the first check valve, looks good. Finely discover the second check valve under the jack....bingo - found this jammed up in the check valve like a tiny sliver - I have no idea what it is: maybe a gasket from the old diverter valve?

 

[steffan]

My second questions is this: while I'm digging around under the jack, in the drivers side rear quarter panel, I find what looks like another washer hose with a white plastic Y-connection and a short piece of rubber hose. You can see it on the left side of the pictureI with the clear washer hose connected to the blue check valve. It looks like it should connect to the washer line but it runs under the truck in a separate wire loom to what seemed like the passenger rear taillight area - does anyone know about this?

 

[jfz80]

I'm not certain but that second pic/? May be for other markets that received the barn doors thus two squirters ?

Is it working now that you cleared the first valve?

 

[blkprj80]

Maybe somebody "plugged it" way upstream when the diverter valve originally failed? You may have pushed it all the way there with your fish cable.

 

[steffan]

It's working great now. Can't imagine why someone would plug it intentionally with that. I think it floated its way there for a while... Maybe the compressed air help compact it?

 

[guzzla]

I pulled the hoses off my washer diverter valve (located in the inner guard) but can't recall what location they connect back to. Has anyone got a diagram to help me out, please?

 

[bulldog1402]

That metal piece plugging your hose is part of the diverter valve. Floated down there and plugged it up. I am sure somewhere down the road it will fail. $40 part.

 

[steffan]

The top hose goes to the hood, bottom to the rear and the side is the inlet

 

[CRUISER MONKEY]

I'm not certain but that second pic/? May be for other markets that received the barn doors thus two squirters ?

Wondered the same thing,, makes sense about the barn door concept.....

 

[4G63 POWER]

So there is only one motor for the front and rear?

 

[GPHS]

Thanks to all who contributed to this thread.
I found the same piece of debris at the same location on my 1997 LC.
As a bonus, I also found a blockage which I have yet to resolve in the body penetrating fitting immediately before the sprayer head. It may be some debris from a earlier, failed diverter valve.

 

[CycloSteve]

Same finding here, with diverter valve parts clogging the one-way valve under the jack.

I rigged up a bike pump and blew out the lines manually. Also cleared the line from the one-way valve up to the rear washer. Works great now, but likely need a new diverter valve (2nd one lasted 10 years) as the front still dribbles a bit when washing the rear window.

 

[bknowlt]

This thread is why I love ih8mud. Replaced the diverter valve thinking that was the issue but still no flow to the rear washer. Found this thread after some digging and sure enough, the same screen/filter was stuck in the check valve under the bottle jack as pictured on previous posts. Crazy that it rolled up perfectly to make it's way down the length of the vehicle.

I cleaned out both check valves at the back of the vehicle and blew out grime from the line. I now have an operable rear washer!

 

[jpoole]

Agree, mud is great for things like this.

I pulled this wadded up plastic out of the rear valve of my '97 a few years ago and had wondered how it got in there. On my 80, after installing the new diverter valve the rear only worked weakly and intermittently. I thought running the rear more would flush it out / fix it but it only got worse. Apparently the plastic wad was getting pushed back and compacted until only a trickle would come out. Worked great as soon as the wad was removed.

Does anyone know if that plastic piece/wad is definitely out of the diverter valve? If it is that's one more reason to try to find an alternative valve in my opinion...

 

[bknowlt]

Agree, mud is great for things like this.

I pulled this wadded up plastic out of the rear valve of my '97 a few years ago and had wondered how it got in there. On my 80, after installing the new diverter valve the rear only worked weakly and intermittently. I thought running the rear more would flush it out / fix it but it only got worse. Apparently the plastic wad was getting pushed back and compacted until only a trickle would come out. Worked great as soon as the wad was removed.

Does anyone know if that plastic piece/wad is definitely out of the diverter valve? If it is that's one more reason to try to find an alternative valve in my opinion...

I'm almost certain I saw a thread discussing rebuilding/servicing the diverter valve and the circular plastic piece was in there when they opened it up. Of course, I can't find the thread now, or I'd link it.

I still have my old valve, maybe I can open it up and see if the plastic wad has a similar form to anything in the valve. Assuming a piece inside the valve delaminates over time and that plastic wad is the first/outer layer that sheds.

 

[bknowlt]

It was bothering me... Found the thread I was referencing.

Windshield washer diverter valve

I know this has been mentioned before, but I couldn't find any pictures, and since everyone loves pictures... Since spring has come (once again this year) to North Carolina, I decided to do a little PM/RM on the fleet. Both my '94 and '95 leak over the rear window when I use the windshield...

forum.ih8mud.com

 

[jpoole]

Nice, definitely the plastic seal piece out of the diverter!

This (linked to in the thread you shared) seems like a viable alternative but a bit of a hassle vs. just getting an og replacement:

Replacement for Rear Wiper Diverter Valve

Finally got tired of buying rear wiper valves and I like having the squirter back there. Found this valve after looking for a little bit. More expensive than OEM, but should last forever with this light duty application (knock on wood as I am sure that's Mr T thought about his valve also)...

forum.ih8mud.com

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I assume that something in the washer fluid (alcohol) may accellerate the break down of the bonding/seal inside the valve. Maybe it's mostly the water/corrosion, but in any case seems like that seal delaminating is the failure point and that shouldn't be too hard to improve on. I may take mine apart when it fails and play with bonding a new seal surface in place and getting rid of the plastic or maybe I'll just get another replacement...

 

[bknowlt]

I'm ok with replacing with the diverter valve with OEM after the next failure - whenever that may be. Would expect years of use before that piece dislodged again.

 

[revolve40]

So I have the same issue (inoperable rear washer). Replaced the pump (fronts weren't working either) and the diverter valve. Front now runs fine, rear still does not. I checked the one-way check valve under the jack and cleared some debris, but still didn't do the trick. The BB faces the front of the car, right?

I must have a clog somewhere between the diverter valve and the check valve under the jack. Are there other check valves or areas to check?