Q: Adding 16 oz Water Wetter

[Austin87]

I want to add 16 oz bottle of Water Wetter to my reservoir tank. I am planning to just syphon out this amount from the reservoir and replace it with the 16oz bottle.

Question is do I have to do anything like vent the bleed valve to do just this?

(newbie) Thanks!
...

[zedsn]

Just put it in. I have this in my 951 and it does work.

[Austin87]

Thanks. So you are saying that with syphoning out 16 oz & putting in 16 oz I do not have to use the bleed valve. Right?

[BTERRY1]

Correct

[Austin87]

OK.. Thanks.

[John_AZ]

Water Wetter or any coolant product will only work with about 1 or 2 QUARTS of antifreeze in the 944 series that holds 8 quarts.

If you add water wetter to a system with a 50/50 mix you will only get 5 degrees +- of temp reduction.

It is written on the bottle.

If you are adding 16 ounces to plain water----you will get good cooling but poor anti- rust/corrosion and freezing properties.

J_AZ

[Gawernator]

I put a bottle in sometimes. It seems to work.

[Austin87]

The temp gauge not staying in place is making me nuts.
The PO told me this is due to the common ground problems and that he has never had a problem.
It acts like it's gonna overheat going up close to red, then it goes back down to 3/4 ways, then down to 1/2 midway, then after 20 min on highway it goes down to just above 1/4 way. The first line.

I cant deal with this. How can I check if I'm really running hot or if this is just electrical?

Would installing an aftermarket numbered gauge be a good option. I am new to this car so need direction from people who know.

[GreenWater]

It sounds like you might have a problem and not just a ground issue. Wait until the car cools off and check the coolant level. If that's fine there might be something wrong with the thermostat. Or use a temperature gun and take reading of how hot the outside of the engine are getting.

[Gawernator]

Could be as simple as the fans not coming on because of fan switch etc

[GreenWater]

Good one. fan switch is a high temp one?

[John_AZ]

Originally Posted by Austin87

The temp gauge not staying in place is making me nuts.
The PO told me this is due to the common ground problems and that he has never had a problem.
It acts like it's gonna overheat going up close to red, then it goes back down to 3/4 ways, then down to 1/2 midway, then after 20 min on highway it goes down to just above 1/4 way. The first line.

I cant deal with this. How can I check if I'm really running hot or if this is just electrical?

Would installing an aftermarket numbered gauge be a good option. I am new to this car so need direction from people who know.

"Water Wetter" , maybe a "dirty ground", "radiator fan switch bad", a couple of possibilities.

How about:
1. A pocket of air in the cooling system? Search for bleeding the cooling system.
There must be hundreds of posts on the topic.
Pelican Parts Technical BBS - Search Results

2. The 924S has an engine temp sensor that is directly wired to the dash temp guage.
It is on the top of the engine in the front with a single blade connector. Do not damage this sensor, a new sensor is about $65. 944s do not have this part.
Clean it.

3. The thermostat and fan switch should be a matched pair. So if you get a typical 80* thermostat you should have a ~80* fan switch. How do you know what is in the car? Get a expensive pair of snap ring pliers and remove the thermostat from the water pump to check.

3a. I use a ~70*C thermostat with a ~70-75*C fan switch. Summer temps in AZ get to a "normal" 110*F for 4 months. My temp guage sits at about half during hot city and freeway driving. Cooler months at 1/4.

4. If your car is running RICH--meaning too much fuel. you will overheat.
4a. Bad O2 sensor.
4b. Bad DME engine temp sensor (get a $20 Bosch and not a cheap URO or aftermarket)
4c. Leaky injectors--get your injectors cleaned and rebuilt at www.witchhunter/com

5. What else? Wrong temp plugs, battery going bad, head gasket, rings, automatic transmission load. AC compressor or freon load ????????????.

Just a couple of things to check.

J_AZ

[Austin87]

I appreciate all the advice but I am lost with what is under this hood. Monday I call my indy and ask him how familiar he is with the car.


..

[John_AZ]

Austin87,
The 944/924S is a DIY car.
You have to read and fix it yourself until ----well, forever.
Clark's Garage Home Page is the workbook.

Read-print out-do it. If you fail the forum will point you in the right direction.

A garage will usually advise this if honest. The inspection and diagnosis of these 26 YO cars will usually cost more than the fix---then repeat, the fix---then repeat the fix.. It will never stop.

GL
J_AZ

[Gawernator]

What a comprehensive post^^^

[tamathumper]

Pretty much nailed it, though. It's even worse for the 968 - as so few were built.

[Austin87]

I do not think this is an overheating problem. example: I just took a 30 minute local drive on the streets in 90 degrees out with the AC on ; and the temp stayed steady normal just above 1st line, even at traffic lights.

For this if I had a bad thermostat, fan switch, or an air pocket in lines I guess the temp would not be "normal" like this.

I will search for the temp sensor in front of my engine asap. I need a diagram or maybe get a Haynes manual if possible to see what is what and where under this hood. I ordered 4 Falken Ziex ZE912 tires today and go back tomorrow Sears for installation. Got the spec 195-60-15's . Sears met Tires + price on tires and out the door is $345. & I get a $50. mail in rebate from Falken.

I am hoping the new tires give a smoother ride since the older tires (3 matching, 1 with a slow leak ) were like riding on rocks.

....Thanks all.

[Gawernator]

Wait a minute hold up. You can narrow this down easily. Go for a drive when it's hot out, but don't turn the A/C on. Idling or stop n go traffic etc, if it starts getting past the top white mark on the gauge and getting to the "too hot" area, but stays cool with the A/C on, then you know it's a fan issue, probably the switch like on my car. To be honest I always use A/C so I have been too busy to replace the failed switch, even though the part is cheap. When the A/C is on, the fans run automatically.

[Austin87]

Originally Posted by Gawernator

Wait a minute hold up. You can narrow this down easily. Go for a drive when it's hot out, but don't turn the A/C on. Idling or stop n go traffic etc, if it starts getting past the top white mark on the gauge and getting to the "too hot" area, but stays cool with the A/C on, then you know it's a fan issue, probably the switch like on my car. To be honest I always use A/C so I have been too busy to replace the failed switch, even though the part is cheap. When the A/C is on, the fans run automatically.

If I am getting this correct, you suggest drive ( it is hot out always here) , No AC ; No idling ; No Stop & Go. So this is only possible to do on a highway. Like a 15 minute highway drive .. Correct?

And if the needle goes past halfway line DURING THE DRIVE, then it is a fan issue.
(possibly failed fan switch) ..

I can do that. If not past the halfway line then , where am I ?

Thanks,

Austin

[jep32]

Isn't it very normal to fluctuate between 1st & 2nd lines in the temp gauge? As long as fans come on and lower the temp....right?