SanDiego928

I have recently been messing around with heater valve and vacuum line and related flaps and vacuum manifold. Heater valve working now but not in correct slider control position, I think. Just know the slide goes up and down on valve when vacuum is applied. Saw no leaks when sorting out around heater valve.

Drove 2 days - 140 miles and tonight noticed the fairly large drip under heater valve area in back of engine on driveway.

Checked Coolant level - required 1 quart and checked it 2 days ago and added 2 cups at that time.

Placed a piece of white paper under drip to collect sample. Clear but oily feel. An hour later not dry, yep...oily. Paper is just looking wet now.

Drip has stopped completely in 1.5 hours.

Any thoughts on what the heck is this liquid and where this is coming from?

I see I have many years of sorting things out but I like this learning experience alot.

Many Thanks!!!!!!!!!!!!!!!!!!!

Ispeed

Clutch hydraulic fluid?

Mrmerlin

did you replace the heater control valve and the short hose??
Look on the bottom of the bell housing for a clutch slave leak.
look at the rear of the cylinder heads and the cam covers for oil leaks

Dictys

AC oil from compressor is my bet. I could be completely wrong but the fluid you describe sounds like this AC oil leak I had on my car.

SanDiego928

Did not replace heater control valve or any hoses, just got it opening and closing via vacuum.

But I have been messing with all v-hoses and v-manifold trying to sort those out and trying different postions on control head in console to see what could or would happen. PO's have totally mucked up the entire heat a/c system. I am sad Blower not working at all (deal with that in 2012).

Clutch slave was checked about 6 months ago and no leaks but good idea to check again since it is clear liquid. Where does this fluid come from? Brakes master cyclinder? I just checked and reservoir is full and at max line and tan color.

Wouldn't head and cam leaks be regular oil - brown color? I changed oil 3 weeks ago and have no leaks. (cross fingers).

Many thanks.

SanDiego928

I will check clutch slave again, thanks. Where does the fluid come from? Master cyclinder for brakes?

SanDiego928

I was just thinking about that an hour ago. AC/blower is non-operative as far as I could tell, but I could have woke it up so to speak with my rooting around with everything. Definite possibilty.

My girlfriend's Son is working in Dubai as an offroad vehicle welder/do everything kind of guy for the last year or 2. Cheers........ He spoke highly of visiting Dubai and living there.

Thanks.

NoVector

Do you have colored antifreeze? I had a similar leak; clear, oily, no oder. I forgot that last time I flushed the radiator, I refilled with Zerex (or whatever it was that Andrew Olson recommended.) It's clear--and sure enough, was leaking from the heater valve when the car was parked AND hot from being under pressure. /

Bilal928S4

Were you running your AC? Or the switch was on? You could have frozen the coil with no airflow as your fan is in operational. Could just be condensate from the coil thawing out.
Bilal

Mrmerlin

replace the heater control valve and short hose
replace the coolant bottle cap.

JHowell37

It's probably coolant. And before you say that coolant is supposed to be green, I know that. It sometimes doesn't always have that green color, especially in small quantities.

SanDiego928

I will replace these now. You only have to tell me twice.

Drove about 10 miles to dinner last night, steam coming out from under the plastic cover just behind HCV - looks like after firewall, gauge not messuring HOT.

Let cool and filled coolant tank with fluid over the next hour; about 30 ounces. disconnected white vacuum line which I recently connected under console a few days before. made it home safely.

Dont even understand if the vacuum line may or may not have had something to do with the steam since this in supposed to close the valve but looked like steam is after the valve. Probably coincidence. Dry inside engine compartment and no leaks underneath and no steam from engine, just coming from under plastic cover.

Will check tank again tomorrow but will replace items mentioned.

I have seen your posts on other threads with the above instructions. We beginners are very fortunate to have you here and others I have met in San Diego. My hat is off to you all. I keep saying this.......

I think I may have more problems/issues inside cabin other than just the HCV - Tank - Hose.

NoVector

^^^^^^^ You'll see a lot of us complain about the quality of the heater control valve on this board--and its leaking. In southern California, you could probably zip-tie it closed. See Tony's site to see what I mean. http://members.rennlist.com/v1uhoh/ That won't fix a hose problem; but, something to consider... / Bruce

SanDiego928

Nice site. When I get into that area this week I will consider this temp fix.

Thanks for the post.

SanDiego928

Found the fluid leaking area. Pooling of coolant - oily, ugly, nasty looking stuff - under AFM and in the ridges of the block.

Valve is very new looking and so is the short hose to the block - looks like it attaches to a press fit flange in the casting and is slightly corroded and what looks like a washer spins freely around this flange at the mating of the casting.

I cannot find this press fit part in PET catalog. Anyone know if this sounds correct? I will call around the big 3 if it leaks at this location.

BIG QUESTION:::::

928-110-098-04 air guide housing per "PET" seems to be just laying in the valley under the plenum. I can move it up and down just a little. Does this just sit in there or are there bolts to hold it in place securely?