BG-Cleaning my car... - Toyota Nation Forum : Toyota Car and Truck Forums

pedrojqc · 05-01-2008, 11:24 AM

I was going to put on some BG-Clean into my Car's Evaporator but guess what I don't know where it is of where I should drill the hole (if necessary). Somebody please help.

Here's a pic of what's under the passenger's dash.

If somebody could circle the area or guide me trough I'll really appreciate it.

njerald · 05-01-2008, 11:49 AM

The evaporator is downstream of the blower (pressure side).

The outside air (and recirculating intake) comes into the fan from the top (where the cabin filter is.

The ducting you see at the top left of the pic is your heated/coled air to the footwell area.

pedrojqc · 05-01-2008, 12:00 PM

njerald can you take my pic and please circle the area you are referring to? I mean the area where I should place the tap?

njerald · 05-01-2008, 12:33 PM

Quote:

Originally Posted by pedrojqc

njerald can you take my pic and please circle the area you are referring to? I mean the area where I should place the tap?

Sorry, I've never looked at that area on my car, I can't see the ducting behind the motor from your pic and I don't have my photo editing program on my laptop.

pedrojqc · 05-01-2008, 12:51 PM

^ Thanks anyways...

Can Somebody Help??!!! I would Like to preform this today if possible...

njerald · 05-01-2008, 01:07 PM

Edited my earlier post.

Do you have the service manual?

Page AC-196 shows how the blower unit hooks up to the AC unit that houses the evaporator and heater radiator.

pedrojqc · 05-01-2008, 01:40 PM

^ yes i have it, will take a look..

njerald · 05-01-2008, 01:46 PM

Quote:

Originally Posted by pedrojqc

^ yes i have it, will take a look..

Ac-207 also shows the blower exit which goes into the AC unit.

If you drill a hole, you should get air flow out of it when the blower is on.

pedrojqc · 05-01-2008, 02:01 PM

So here is where the hole should be drilled?

njerald · 05-01-2008, 02:03 PM

Quote:

Originally Posted by pedrojqc

So here is where the hole should be drilled?

Looks like it to me..

pedrojqc · 05-01-2008, 02:10 PM

This is what I understand from the A/C Manual. The air comes in from the outside of the car trough the air cabin filter then trough the Blower and then it gets to the evaporator trough that duct, right? I guess that is the more logic place to drill the hole.

njerald · 05-01-2008, 02:25 PM

Quote:

Originally Posted by pedrojqc

This is what I understand from the A/C Manual. The air comes in from the outside of the car trough the air cabin filter then trough the Blower and then it gets to the evaporator trough that duct, right? I guess that is the more logic place to drill the

Yes.

Where the evaporator exactly sits in the housing to the left is not very clear from the manual.

TRD VVTi · 05-01-2008, 03:33 PM

Drilling holes in a car for maintenance is stupid.

In the automotive field, people that do those things are referred to as "hacks" or "butchers".

Inject the cleaning foam through the evaporator drain tube.

pedrojqc · 05-01-2008, 03:57 PM

Quote:

Inject the cleaning foam through the evaporator drain tube

According to the BG-Clean instructions you should leave the evaporator drain port clear. "Make sure it is open and will drain properly"

If you inject the BG-Clean into the drain port how the debris is supposed to get out of you car?

Anyways I did drill the hole and it did the job...The hole isn't noticeable at all.

Thanks, ngerald for your help.

TRD VVTi · 05-01-2008, 04:38 PM

BG is the only one that I know of that recommends drilling a hole in the case.

It may work the same but I'm not a fan of drilling extra holes anywhere when it can be avoided.

I would think that it works better the way other cleaners are used. That is, injecting the foam through the drain, letting it soak, and then removing the tip from the evap. drain so that the foam which has now turned back into a liquid sweeps everything out with it as it drains out.