[sasilverbullet]

<img src="/forum/images/smilies/968/blink.gif" class="smilie" alt="" /> I just put a brand new thermostat in, yuck what a messy job! <img src="/forum/images/smilies/968/ohmy.gif" class="smilie" alt="" />



I'll post back tomorrow evening to let everyone know if that fixed the temp gauge going to the second white mark whenever I get on it hard in the heat...



P.S. my neighbor is a mechanic for a living, he says if the temp goes up when you get on it, and settles down when you idle, then the radiator is bad. A new radiator was just put on in January! Well if the thermostat doesn't fix it, next stop is have the shop give me another radiator under warranty, and I get to drain the coolant AGAIN!!!



So how about if everyone says a prayer or two that this fixes my problem once and for all <img src="/forum/images/smilies/968/rolleyes.gif" class="smilie" alt="" /> !!!!

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[flash]

well, that's close - really what it generally means is that the flow is bad - bascially it means the system does not have the capacity needed - could also be a bad pump - somebody else just had this same problem not too long ago

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[Greimann]

My vote is there is a problem with the fans. Either the fan switch is bad or the big resistor doughnuts on the firewall next to the battery have corroded connectors.

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[sasilverbullet]

I double checked the fans yesterday, without the ac on, they both come on and go off when they should. And with the ac on, they are both on at the same time.



I'll post this evening how the temp acted during the day today...

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[sasilverbullet]

Oh, and one time I put a new radiator in my 951 - car ran too warm. Finally took the radiator back out and found that one of the hose outlets WAS PLUGGED!! Yes, no kidding, the hose connector was there, but it was blocked by plastic that didn't get cut out properly! Returned the radiator, put a new one in, voila all fixed.



So a brand new radiator CAN be bad!

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[Bob Kovacs]

Does anyone have experience with a product that came out a few years ago that was supposed to improve heat transfer from the coolant to the radiator? I think the stuff was referred to as a "wetting" agent. Anyone have experience with this?



My temperature gauge has also been getting higher than I'd like one these steamy Washington, DC days. I end up turning the A/C off and dealing with the heat on my ride home. It's not as bad as it sounds, since my work is air conditioned to the point where nearly all molecular motion stops.



--Bob

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[Greimann]

[quote name='Bob Kovacs' date='Aug 4 2005, 05:53 AM']Does anyone have experience with a product that came out a few years ago that was supposed to improve heat transfer from the coolant to the radiator? I think the stuff was referred to as a "wetting" agent. Anyone have experience with this?

--Bob

[right][post="8366"]<{POST_SNAPBACK}>[/post][/right][/quote]

Redline Water wetter is what you are thinking about I'll wager. It is a surfactant that breaks the surface tension of the water, allowing it to contct the metal more directly. I have tried it in another vehicle. Can't say that it changed things much, but the technology is sound. Racers like to use it because in certain types of racing, you can't run anti-freeze, just plain water. This stuff helps in that situation.

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[GuardsRedCoupe]

[quote name='Bob Kovacs' date='Aug 4 2005, 08:53 AM']My temperature gauge has also been getting higher than I'd like one these steamy Washington, DC days. I end up turning the A/C off and dealing with the heat on my ride home.

[right][post="8366"]<{POST_SNAPBACK}>[/post][/right][/quote]



I've been doing the same thing, and I'll be looking into this problem as soon as I get some of my electrical gremlins evicted. On the drive home from buying my car, I turned the AC off when the temperature hit the highest white line, driving the temp back down. I'm glad I did so, since the consensus seems to be that the needle aught not go above 9 o'clock.

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[flash]

grc - it all depends on the fan switch - the stock one will let it get up there - the vanagon one won't



take a look at your low temp fan operation, and make sure they are coming on - also, bleed your system just to make sure there are no air pockets there

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[Silver BLT]

"Water Wetter" is almost always added to diesel motors to prevent water pump premature failure. Sounds like it would also help with temps. It goes in the F250 every two years when the Anti-freeze gets changed out.

Silver BLT

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[Bart]

I have used Redline's water wetter in my race car and didn't see a difference. I haven't used it in a couple of years. I normally use distilled water in the race car unless I am running late in the season and there is a chance of freezing temps overnight.

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[968 Cab]

I'm using Redline Water Wetter in all the cars now and it does work. In the 951S, there is a definite lower operating temp and it's easier to maintain the lower temps during hard running. Highly recommended - but as the previous posts note, nothing beats having a working rad, water pump, and a proper fill.

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[mike]

My 944S2 is in the shop right now to fix a nagging cooling problem that I was having. After flushing, checking cooling fan function, radiator, thermostat, water pump and checking temps at various points in the system, my mechanic found that the temps between the #2 and #3 cylinders were much higher than at other points. After removing the head, he said that the gasket had pretty much disintegrated between #2 and #3 and that gasket material was covering holes in the water jacket. This had also caused damage to the head which is now being machined to clean things up. The car did not lose coolant and the compression and leakdown numbers did not reveal a head gasket problem. Hopefully, this is not the same problem that you are having because it is a fairly expensive repair but I just thought I'd let you know.



Mike

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[Dirk]

[quote name='sasilverbullet' date='Aug 4 2005, 01:37 PM']

Oh, and one time I put a new radiator in my 951 - car ran too warm. Finally took the radiator back out and found that one of the hose outlets WAS PLUGGED!!



It's a bit off topic but non the less;



I was working in Israel, a hot place and used a small (14 kW) Japanese Airman generator that was running hot.



I checked everything and finally started to take it apart.

Eventually I found a large white sports sock inside the radiator, it was plugging off most of the channels.

Once taken out there were no more problems overheating <img src="/forum/images/smilies/968/smile.gif" class="smilie" alt="" />

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