Overheating question

[livewirevoodoo]

Hey everybody.. Havent been around here much in the past year. No need no, no problems to pick everyone's brain about.

Until now.

Doesnt seem to bad though and the problem is remedied, but here goes....

I overheated today, for about 30 seconds. Killed the engine, waited for the temps to come down, then drove home. The 30 degree outside air kept the engine cool for the 5 mins I drove home with no further overheating episodes.

Luckily(?) it was caused by both cooling fan fuses blowing. I noticed, just prior to overheating coolant smell.

My questions are - Should I be concerned about overheating for 30 seconds? Would I be looking at any head gasket damage, etc? Why would I get a coolant smell? (the coolant overflow tank was cool to the touch when I killed the engine when I noticed it overheating). And finally, why would contribue to both radiator fans blowing? Angry porsche gods perhaps...

Any help, as always, is greatly appreciated. Thanks in advance.

[Dantilla]

Fix the fans and drive the car.

Thirty seconds is not long enough to build the heat necessary to do any damage.

[livewirevoodoo]

It was actually both fan fuses (#10 and #15) that blew. Had some spares, fans are operational again

Thanks for the quick reply Dantilla.

[Techno Duck]

Check the wiring to the fans for shorts, see if the insulation is cracked or frayed..etc.

[bearone2]

probably. overheating 30 secs, as in pegged to the redline while running says water pump not working if the exp tank was cool.

was the a/c on?

when you turned the key off the temps went higher.
were both fans running after you turned the key off?

good luck

[bazar01]

Both fuses blown meant both fan motors are on their last leg.
The fan motors are drawing current higher than full load amps.
Could be winding insulation breaking down or bearings seizing up.

[livewirevoodoo]

Originally posted by bazar01
Both fuses blown meant both fan motors are on their last leg.
The fan motors are drawing current higher than full load amps.
Could be winding insulation breaking down or bearings seizing up.

Thanks for the insight, bazar.

And this is remedied by a radiator fan rip and replace, right?

Originally posted by bearone2
was the a/c on?

when you turned the key off the temps went higher.
were both fans running after you turned the key off?

Heater was on, outside temps were in the 20s last night. When I turned the key off neither fan turned on due to both fan fuses being the cause of the overheating.

[bazar01]

Originally posted by livewirevoodoo
Thanks for the insight, bazar.

And this is remedied by a radiator fan rip and replace, right?

When my passenger side fan was blowing fuses, I pulled it out hoping to replace the bearings.
Nope, the bearing retainer is crimped and spot welded if I remember right.
Had to buy a used fan from evilbay. New motor costs a lot of money.

[bearone2]

it's been a while back but i bought, thru here, six bl fans and the shroud for $75

[bazar01]

New fan motors are expensive, no shroud. Did you buy it used?

[bearone2]

i've seen the add. you notice how the non-insulated, pos, 3 bl fans are more expensive than the more efficient 6 bl's.

yes. i posted i needed it, got a pm, made arrangements for the $75.

with as many parts cars around, anyone who insists on paying retail prices for the 6 bl fans.........

[chitown944]

Um why on earth would any fan go on if its 30 degrees outside. I dont get it am I missing something.

[bazar01]

Why would a fan turn ON in 30 degree outside temp?

944 engines have no engine belt driven radiator fan.
It will be ok if the car is always moving, but in stop and go traffic, it will overheat even in 30 degree outside temp.

Where do you think the engine heat is going to even in sub-zero outside temp when you get stuck in stop and go traffic?

[bearone2]

Originally posted by chitown944
Um why on earth would any fan go on if its 30 degrees outside. I dont get it am I missing something.

possibly.

30 deg outside, going up a hill @3500/3rd gear/or 3500 in 4th gear, assuming the motor is at operating temp, near the middle line and the fans come on.

[chitown944]

Ive never heard my fans going on during the winter time at all. Make no mistake I know when my fans come on. They are noisey. Am I in the minority on never experiencing the fans NOT coming on in the winter. This seems extremely odd to me.

[Tidybuoy]

My fans go on every time I park the car - about 30 seconds after turning off the engine. I rarely hear them come on while I'm driving but they have come on, usually in the summer but ocasionally in the winter when sitting in traffic (but being in California, we all know that there isn't any traffic here- lol).

Vern