[sasilverbullet]

On the back of the WaterWetter bottle they claim:



50% glycol + 50% water - 228 degrees

50/50 + WaterWetter - 220 degrees

Water only - 220 degrees

Water & WaterWetter - 202 degrees



Ok, I didn't fall off the turnip wagon yesterday so I know marketing drivel is just that, drivel. Is this just marketing hype or are these figures representative of the decrease I'll get in temperature?



Fan switch/thermostat issue - I have a stock fan switch and thermostat in the car now with 50/50 mixture (non-phosphate).



I have in my hands:

1. 75 degree fan switch - Wahler PN# 251 959 481 75

2. 71 degree thermostat - Wahler PN# 056 121 113 71

3. 85 degree fan switch - Wahler PN# 251 959 481 K

4. 80 degree thermostat - Wahler PN# 056 121 113 A



Remember I live here in South Texas = HOT, MUGGY and did I say HOT? <img src="/forum/images/smilies/968/rolleyes.gif" class="smilie" alt="" /> And I drive the car everyday, in traffic, (did I say HOT traffic? <img src="/forum/images/smilies/968/biggrin.gif" class="smilie" alt="" /> ) with A/C on and at least once a month I go out to the hill country and drive it hard for about 6-8 hours (in the HEAT!!!) <img src="/forum/images/smilies/968/smile.gif" class="smilie" alt="" />



Right now the gauge in 70 degree weather with no A/C will sit above the bottom white line, but sometimes creep up to about the 10:30 position before it will drop some. I don't know if that's because the thermostat just opened or because the fans came on. On a real hot day with the A/C running and I'm pushing it hard around 100mph up hills and down it will climb up to just a little below the top white line.



My goal is that the temp gauge rides a little above the bottom white line whether I'm just tooling around the neighborhood on a 70 degree day, or hauling *** in the hill country on a hot day. I realize it's going to vary some, but I'd like to stay within the 20 degree range that Flash quoted as a good range to shoot for. Right now I think I'm doing a 40 degree or so swing.



Suggestions on how to proceed? Which one(s) to try first? I'm open for suggestions and oh by the way, I'd like to keep the draining the cooling system and changing things out to a minimum! <img src="/forum/images/smilies/968/ohmy.gif" class="smilie" alt="" />



P.S. I have checked and both fans run when the A/C is on...

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[cosimo]

I have tried water wetter and found it somewhat effective. My car (95 coupe) was always running on the hot side even in Wash DC area. It would creep up to the upper white line. I worked for a Mini Cooper Race team at last year's Grand American race at VIR and they used water wetter in their race cars. I thought that was a good endorsement. It shouldn't hurt to try.

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[sasilverbullet]

did u use it water and WW? or glycol and WW?

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[cosimo]

I added it to the Antifreeze that was in the radiator.

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[gryphon]

Is this stuff readily available in auto parts stores? Seems like a no brainer to try in a hot climate like Arizona.



Tom

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[rustech]

I tried it, it works well.



Yes, it's available at the local autostores.



BTW, both fans always operate at the same time. They have a low speed, and a high speed.

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[Harvey]

While we're on this topic, does anyone have any ideas for getting rid of the white "scale" that I see behind my thermostat? I assume it's throughout the car. It's not a lot but I'd like to dissolve it w/o dissolving my aluminum block or clogging my radiator. Anything you've tried would be welcomed. Thanks.



BTW, this is on the 928 I just bought...not the 968.



Harvey

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[sasilverbullet]

So how can I troubleshoot to make sure that the fans work at both speeds?



What kicks the 'high' speed in?

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[sasilverbullet]

Bump - ummmm, did I not wear deodorant? Why no responses...

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[flash]

huh - what? sorry - napping



high speed is kicked in by the temp reaching the point that it needs to kick in ( i think the AC kicks it in too)



you can test the fans (or more spcifically the fan thermal switch) by using a jumper wire at the connector that goes to the thermal switch - there are 3 wires - one is hot, the other two are the sends to the fans - i can't remember which is which, but it's pretty easy to figure out - pull the connector, jump pin to pin - see what happens (key must be on - engine not running)

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[sasilverbullet]

Thanks Flash! I thought maybe I made you mad or something! <img src="/forum/images/smilies/968/rolleyes.gif" class="smilie" alt="" />

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[rustech]

I hadn't seen your post on the 25th either or would have replied, sorry. You can also just run the car to temp and see if they are both working. Just watch the fans through the temp swing. Try the A/C also and make sure the fans hit high speed.



Harvey, I used a radiator flush to clean my system with great cleaning results, but use at your own risk. Remember to use phosphate-free antifreeze so there is no reaction with the aluminum block. A mild scraping behind the thermostat will insure it seats properly.

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