Do you blow cool your engine after a run?
 

Do you blow cool your engine after a run?

I just noticed the fan on the white Carrera from Brian's photo.

http://forums.pelicanparts.com/uploa...1379540142.jpg

http://forums.pelicanparts.com/uploa...1379540238.jpg

No, not necessary for my uses.

I hate to admit it

Nah... maybe if I was going to get my hands in there and wanted to cool off engine sooner.

Uhhhhhh NO.

My old hotrod '69 S - I ran 8-10 track events per year - 20-25 days per year for 5-6 years straight of flogging the thing as hard as can be done..... 7700rpm on a Supertec built 2.6L mag case with stock rods... and I never did so much as raise the lid after a session.

I did change the oil once a year or so. I also adjusted the valves. Once. In 5 years.

She was still running like a freight train when I sold her.

But I have used the engine heat to dry the inside of my helmet.

I sometimes leave both garage doors open - does that count?

That's what the eleven blade engine fan is for, isn't it?

Should we be fanning our water cooled cars too since the radiator fans shut off when the engine is turned off? I do notice a significant amount of heat radiating from the engine when I pop the hood.

After a drive I raise the engine lid once the car is back in the garage. Lets the heat out and not much else.

Cost nothing and it takes about 20 seconds to do.

Let it cool naturally...

At 63 I don't have enough breath left in me!
Ernie 81sc

No, I'm a normal person.

^ hahahaha

No. The engine has a perfectly good fan installed. A quiet lap around the block before shutting it down after a thrashing is enough.

I think the Porsche engineers took into account hot days and hot track days when they designed our cars.

No fan necessary. Me, on the other hand, will reach for a cold beer after a drive.

But it's funny, when I turn my motor off the fan stops cooling the engine. Do you think I have a defective 11 blade fan?????

I had a water cooled car whose fans actually continued to work on certain occasions for a few minutes after the engine was shut off.

The point is that Porsche designed a motor to cool the engine while in operation. Fresh cool air did the job. What I am concerned about is "heat soak." Once the cooling fan stops the temperature will rise. Will that cause damage, vapor lock, burnt oil, etc? I'm not sure, but I am one of the abnormal persons here.


I've read heat soak may increase your engine temp by "20 - 50 degrees hotter."

http://www.lotustalk.com/forums/f25/please-explain-heat-soak-50397/

If your engine is not running you are not going to build any more heat. The fins on the cylinders will still be sheding heat without the fan running.

Blowing air over it will get rid of the hot air sitting around said cylinders no doubt but you need to ask yourself why are you shutting down your engine with out letting it cool down?

This has the potential to turn into a "hot flushes?" thread.
I too rely on the engine's fanny to keep it cool.

Some fair points raised , esp by Grady , in this old thread http://forums.pelicanparts.com/porsche-911-technical-forum/158227-engine-cool-down-procedure.html

The best way to cool any engine is to run at a low power setting for a period of time. How long, depends on how hard it was run, racers take a cool down lap, I always go easy on the loud pedal starting about 5 minutes from shut down.

If you park in the garage, open the lid. Nothing like oven baking your hoses and electrics when you don't have to.

My hoses are ovenproof (even hot oil proof), that's why they put them in my engine. Sorry to hear your hoses aren't. Maybe you could find some that are...

Best to keep your powder dry and your beer cold.