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G35-G37 Water leaks - probable cause and solution

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G35-G37 Water leaks - probable cause and solution

  #46  
Old 10-11-2018, 09:57 PM
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If you can get to the holes I don't see any harm in enlarging them slightly. Another solution is to buy a left hand battery cover and you'll never have leaves in the compartment ever again. It was standard on the Japanese Skylines so availability is pretty good.

Looks like this: https://www.ebay.com/itm/2005-Infini...qc8:rk:22:pf:0
 
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  #47  
Old 10-15-2018, 11:34 AM
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Thanks Blue, It does have the cover but the leaves still slip under it somehow. I was able to drill a 1 1/4 hole on both drivers and passengers side. I hope the cures the problem.
 
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  #48  
Old 10-15-2018, 12:56 PM
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Just be sure to protect that exposed metal or it will rust itself to a MUCH larger hole lol.
 
  #49  
Old 10-15-2018, 06:59 PM
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Blue, thanks for that. I had always wondered why the cover on the driver side had a battery icon on it. Now I know! Looks like the POs of my car DID do something useful besides changing the oil on time and the clutch!
 
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  #50  
Old 12-05-2018, 07:22 PM
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Question. What kind of rate of water can the sunroof drain tubes handle? Reason why I ask is that I am getting water on the passenger side front floor area. Took the car to a dealer, and he said it was the drain tubes. Paid him to fix the tubes, and then went on a trip down south. Then I discovered water again on the rug. Took the car to another dealer, and he said the problem is a leaking gasket on the sunroof. The car is 11 years old. He says you can't buy the gasket separately, that you have to buy a whole new glass roof, to the tune of $1800! Is this BS?

The whole idea is that the drainage tubes are designed to carry away water that's managed to get past the sunroof gaskets. That's why I'm wondering how much water can the tubes handle. When you folks say you test the tubes by pouring water into the open roof, how much water are we talking about, and how quickly?

Thanks!
 
  #51  
Old 12-06-2018, 11:31 AM
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After I did my mods the flood of water stopped. However I still had a little water leaking from the sun roof drains. I ended up removing the plastic drain that goes through the firewall and putting in a piece of copper tubing sticking out a inch or so and then sealing the opening with silicone. Works great and will not stop up again.
 
  #52  
Old 12-21-2018, 05:53 PM
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Hello. Got a 2007 G35 from the MIL and she warned me about a leak on the front passenger side. Since it was usually parked under a cover, she rarely saw the all-weather mat hold water, and it was easy for her to just dry off with a towel.

Car is not so lucky with me since there is no covered parking where I work. Last week when it rained hard, I noticed the mat was full of water. Dumped it out and as I was driving home, I could see water drip from under the glove box and hear water sloshing back and forth. When I got home, the whole front and rear passenger floor were soaked. Took the carpet up to dry out and found this very helpful forum, starting with Bill Henderson's post from five years ago.

I partially took down the headliner and had my lovely assistant pour a pitcher of water in each of the four drain holes. The two front ones drained just fine. When I got to the two back ones, I noticed that they drain fine when water was poured at an average rate. When it was poured quickly, I noticed that both sides would leak - not where the hose and nipple connect but out of the white plastic case next to it (see photo).

QDPX (post #50) asked a great question. When we pour water down the drains, how accurate is it to a real-life scenario when the roof is closed? Even if the sunroof seal isn't water tight, shouldn't the flow rate be much less than pouring water at a moderate amount directly into the the drain holes?

My next task is to pull the end of the tube attached to a yellow cup out from the fire wall. Saw a few videos on how to modify it with either a straw or pen. Hoping that will fix my problem.

 
  #53  
Old 02-09-2019, 02:04 PM
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Sunroof Drain Leak that caused my carpet to be wet

The solution to my problem was a drain tube that ends on the passenger floor. I pulled it out, reinserted it and added silicone.
 
Attached Thumbnails G35-G37 Water leaks - probable cause and solution-d7543e34-3db5-49b6-b359-3a098783db82.jpeg   G35-G37 Water leaks - probable cause and solution-2ed68b41-720b-44c0-bfeb-11d3a661d29e.jpeg   G35-G37 Water leaks - probable cause and solution-e998cf6b-f6f6-4dcc-b0b8-21b3b4282302.jpeg   G35-G37 Water leaks - probable cause and solution-a8b51625-368a-4730-8916-67afe0c124e6.jpeg   G35-G37 Water leaks - probable cause and solution-6076242f-ac44-4036-8694-4eb0b0519212.jpeg  

G35-G37 Water leaks - probable cause and solution-fe45a708-9797-4791-89c9-6b59af118668.jpeg  
  #54  
Old 03-16-2019, 01:15 PM
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Water leak passenger side

Originally Posted by knightmare View Post
Reading all of your replies gave me hope, but alas it was for naught. Zero water leaking up there, the tubes allow water to run freely no problem and are fully attached. Also the headliner is not plastic-backed, so if there was a leak from the sunroof, I would know it, it would soak the headliner and be clearly visible.

So I am back to where I started...no clue where the water is coming from. Going to leave the car torn apart for a few weeks to try to narrow it down again, but I have done this before with no luck. The issue is so random, it could be months before the water returns, and it's not fun making my GF sit in the back because the passenger seat is removed, so I might just take it to the shop.

I will post back with whatever is found as this is a true mystery that others should know about when searching the issue.

Funny the dealer said when I called previously "our cars don't leak"....I beg to differ.
I have the same problem.. However my sunroof IS NOT the culprit. It is a leak around the COWEL PANEL.
 
  #55  
Old 03-16-2019, 01:28 PM
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Remove the cowl and check the drains, they can accumulate debris inside that plugs the cowel drain.
 
  #56  
Old 03-17-2019, 01:19 AM
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Also when re-installing the cowl, make sure the trim strips that fit against the bottom of the windshield aren't overlapping, pinched under the edge of the cowl or leaving gaps anywhere. Don't ask how I know lol.
 
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