How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Toyota Service Your Own Question
Toyota Service
Toyota Service, Toyota Expert
Category: Toyota
Satisfied Customers: 4597
Experience:  30+ Yrs of auto experience, Award Winning Svc. Manager; Just Answer Customer's Choice Award Winner
14892859
Type Your Toyota Question Here...
Toyota Service is online now
A new question is answered every 9 seconds

I have a 1999 toyota tacoma which started leaking water on

Customer Question

I have a 1999 toyota tacoma which started leaking water on the passinger side. I found the fan motor housing wet and the under side of the floor mat wet, but not the front side of the mat. Can you help me find and stop the leak?
Submitted: 10 months ago.
Category: Toyota
Expert:  Toyota Service replied 10 months ago.

Hello. Welcome to Just Answer. Please allow me to assist you. Before we begin, was the AC being used prior to seeing the leak, or, was the vehicle in a large rainstorm? thanks

Customer: replied 10 months ago.
No. We just had a 10" snow fall. I have had this leak for about 3 months and have cleaned out the AC drain. Any suggestions?
Expert:  Toyota Service replied 10 months ago.

Thanks for the reply. What you probably have going on here is a blockage in the cowl drains. On either side of the cowl panel (which is open to allow fresh air to enter the heater box), there are drains that allow any water that enters into the cowl area to drain out. If these drain passages get plugged up with dirt, debris or other substances, the cowl panel will fill with water. This water can seep thru body seams and can also, if the water gets high enough, enter into the fresh air intake on the passenger side of the cowl.

The thing to do here is get a bucket of water and pour it into the cowl opening. Water should pour out from under the vehicle, from the bottom of the cab, behind the front wheels. Water should pour out at a rapid pace. If it dribbles, a strong wire (a coat-hanger works great) can be used to poke thru the hole and loosen any blockage found.

Expert:  Toyota Service replied 10 months ago.

Please confirm that you have received my input. If you have any questions, please feel free to ask. Thanks.

Expert:  Toyota Service replied 10 months ago.

Your live call offer did not go thru. The site will send you information.

Expert:  Toyota Service replied 10 months ago.

Your other phone call request (that you just did) did not proceed either.

Customer: replied 10 months ago.
I have had the mechanic run water over the air intake screen located in front glass for an hour but found no leaks. I have also had the AC drain cleaned out by blowing air and a rod to pull trash out it appears to be clear.
Expert:  Toyota Service replied 10 months ago.

This issue here is not running water, it is water retention. Assuming the cowl drains are clear, and the cowl seams are good and tight, the front body seams on the firewall) have been known to leak, and, I just resealed the body seams on the back of the cab on a similar truck. Water was coming in from the rear cab panel and getting onto the front floor. Removal of the pickup bed was necessary to complete the resealing of the leaking rear body seam. You might want to water test the back of the cab. And the sunroof drains if this vehicle has a sunroof.

Expert:  Toyota Service replied 10 months ago.

Additionally, if your vehicle has a sliding rear window, these too are known to allow water to get onto the floor, travelling under the carpet.

Customer: replied 10 months ago.
The front passenger water leak was found dripping from the fan housing. It has nothing to do with the rear of the truck. I have check the AC drains and had them cleaned. I have a wire screen over the front intake vent to the fan housing that came on the truck when I purchased it. any more thoughts?
Expert:  Toyota Service replied 10 months ago.

If you have water dripping onto the fan housing, your intake snorkel is leaking where it attaches to the cowl. This takes us back to clogged cowl drains on the passenger side. That, or the base of the windshield is leaking.

Customer: replied 10 months ago.
How do you get to this clogged drain?
Expert:  Toyota Service replied 10 months ago.

You remove the cowl panel and use a pressure washer to blow the debris out.

Customer: replied 10 months ago.
Would you send me a copy of the procedure you have out lined for doing this? Thanks
Expert:  Toyota Service replied 10 months ago.

You remove the wiper arms, the plastic panel, disconnect the wiper motor, remove the wiper linkage.

Customer: replied 10 months ago.
Is this something I can do my or do I take to a mechanic or dealer?
Customer: replied 10 months ago.
Is there a Technical Service bulletin on this procedure? What would the number be?
Customer: replied 10 months ago.
How do I get a copy of the TSB?
Expert:  Toyota Service replied 10 months ago.

You might want to give this TSB to a good body shop.

Expert:  Toyota Service replied 10 months ago.

Here is the TSB

Expert:  Toyota Service replied 10 months ago.

If you have any other questions, please feel free to reply; I will be very glad to help you further.

If you do not have any questions, and are satisfied with my input on your request, thanks for choosing Just Answer. It was a pleasure to assist you today. I trust my input to your request is satisfactory to you and meets your expectations.

A positive rating would be greatly appreciated for my assistance on your inquiry.

Thanks in advance and thank you again for choosing Just Answer

Related Toyota Questions