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Windshield Washer Resevoir - Vacuum

Tiny
SULLYZ300
  • MEMBER
  • 1992 NISSAN 300ZX
  • 100,000 MILES
The windshiel washer resevoir inthe rear deck lid, drivers side of my 92 300 zx 2 door / Non turbo has been " hissing" for about 2 weeks. So I filled it with fluid and the system still does not spit wash to my windshield, though the light on the dash went out. PROBLEM - after running the car for 2 minutes I heard a KNOCK, like someone knocking bowling balls together (just one knock) and I immediately shut off my engine. Under the left side of the intake manifold ( right where the are is brought into the top of the cylinders ) in the engine compartment I now see blue water drops coming from what seems to be outta nowhere? Any ideas before I attempt to start the car again? The engine had been swapped out about 2 years ago and I think a vacuum has sucked the wash fluid to the wrong spot. Thanks -Sean
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Monday, November 28th, 2011 AT 9:46 PM

18 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Ya it probably has just disconnect it from the source to stop it and plug it for now. I'm sending the only vacuum diagram we have for this car.
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Monday, November 28th, 2011 AT 9:56 PM
Tiny
SULLYZ300
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  • 10 POSTS
Wow, that was quick. Thank you. I still (after 2 hours)have a small drip coming from inside / out near the #9 throttle chamber. Its almost like as if a gasket had failed. It looks like the wash fluid had been sucked into the intake manifold or injectors because I heard a KNOCK. What should I do? I have no wash fluid container or motor in this car. I think the previous owner took it out though the fluid is coming all the way from the rear forward. Ill send another pic of the drip tomorrow. Thanks a million - Sean (NJ)
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Monday, November 28th, 2011 AT 10:20 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Like I said disconnect the hose and put a rubber plug where it was. The ws fluid wont hurt anything.
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Monday, November 28th, 2011 AT 11:23 PM
Tiny
SULLYZ300
  • MEMBER
  • 10 POSTS
Thats the thing.I dont have any noticabel tubes dripping water? Its the equivelant of a blown headgasket and oil dripping out the side. But I have blue drops of wash fluid dripping out of the manifold seal that encloses the chamber for air and fuel mix ( I think thats the term ) and it still drips through the manifold seal - like it is preasurized with the car not running. I have no clue where or how the wash fluid found its way to the manifold. If I could find a tube dripping I would plug it but I have no obvious signs other than the manifold seal under the left side chamber (fuel injection area) Wash fluid is inside and being fed somewhere off a vacuum like an IV drip. I fear starting the car if water has gotten inside that area as it will get sucked into the cylynders. - Thank you ** Pic attached.
Sean 818-571-7782
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Monday, November 28th, 2011 AT 11:47 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
It could be antifreeze instead of wash fluid. If you fear it then have a pro check itout for you to find out what it is.
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Monday, November 28th, 2011 AT 11:49 PM
Tiny
SULLYZ300
  • MEMBER
  • 10 POSTS
Im sure its wash fluid. Lost. No clue hwo it somehow got there. Afraid to start it. Ill look into it tomorrow and see what I can connect and disconnect. Sean
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Tuesday, November 29th, 2011 AT 12:07 AM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
If it's definitely wash fluid then there has to be a hose or tank someplcae where this iscoming from. Follow all the lines especially ones that runoff the engine to firewall or around the firewall.
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Tuesday, November 29th, 2011 AT 12:11 AM
Tiny
SULLYZ300
  • MEMBER
  • 10 POSTS
Really, thanks a million for the quick responses, what should I do about any wash fluid that has made it into the injection manifold?
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Tuesday, November 29th, 2011 AT 12:15 AM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Nothing just run it
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Tuesday, November 29th, 2011 AT 12:15 AM
Tiny
SULLYZ300
  • MEMBER
  • 10 POSTS
Is that why I heard the KNOCK early today before I shut the car off? Misfire and knock due to the water in the chamber? Should I expect to hear it again when I start up after some troubleshooting?
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Tuesday, November 29th, 2011 AT 12:28 AM
Tiny
HMAC300
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You might. But the knock could be form anything really
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Tuesday, November 29th, 2011 AT 12:30 AM
Tiny
SULLYZ300
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  • 10 POSTS
Once the wash fluid got to the manifold it was a noticable loud knock that was definately out of synch from the RPM of the engine as I shut it off.
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Tuesday, November 29th, 2011 AT 12:35 AM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
I cannot offer you any other suggestions. I can't hear the noise so I can't really tell you what it is.
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Tuesday, November 29th, 2011 AT 12:36 AM
Tiny
SULLYZ300
  • MEMBER
  • 10 POSTS
I guess ill just have to try and see tomorrow. In my novice guess it almost sounded like the timing jumped when the water caused a cumbustion glitch which then caused the piston to maybe hit a valve? Guess, which I hope is wrong.
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Tuesday, November 29th, 2011 AT 12:49 AM
Tiny
SULLYZ300
  • MEMBER
  • 10 POSTS
So I tooled around today and followed the rear resevior hose from the right wheel well up and over and around and someone hooked it up direct to the #14 AIV Control selonoid to balance tube which is attached to part # 5 fuel damper to balance tube. RETARDS ! So the hose was basically pushing washer fluid direct into the air manifold (like NOS but wash fluid instead) - I think about 2 ounces made it into the chamber all-in-all. I then hooked the washer fluid hose up to its rightfull location and now it works fine and sprays the windshield as desired. I wonder what the colateral damage may be? Ill wait till tomorrow to try and start the car. Should I expect anything or just prepare for the worst? Should I spray any carb cleaner or booster in there to counter the water / fluid? I left the throttle propped open though I dont think it wil help other than mentally.
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Tuesday, November 29th, 2011 AT 7:58 PM
Tiny
HMAC300
  • MECHANIC
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I really don't know if you have everheard of water injection, it's beenarond then goes then comes back but start the damn car up and if it still knocks then take it to a pro who can give you a professional opinion. I really dont' think there is much damage there at all.I can offer no further assitance and glad you found the mistake.
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Tuesday, November 29th, 2011 AT 8:01 PM
Tiny
SULLYZ300
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  • 10 POSTS
Ok ill do that tomorrow and I thank you for your help, you have been an allstar. Should I cap that port/nipple that im pointing to in the picture. There is no hose or purpose that I know of. That will be my last question. - Sean
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Tuesday, November 29th, 2011 AT 8:16 PM
Tiny
HMAC300
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Yes told you to do that a bout 4 messages ago otherwise you 'll have a vacuum leak
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Tuesday, November 29th, 2011 AT 8:37 PM

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