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> old school 'autocool' pics, for tat2dphreak & critics alike
root
post Apr 27 2005, 07:57 AM
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Here's pix I took last night of the ACS, classic german enginutty! (IMG:http://www.914world.com/bbs2/html/emoticons/biggrin.gif)


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root
post Apr 27 2005, 07:58 AM
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2nd


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root
post Apr 27 2005, 07:58 AM
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3rd


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root
post Apr 27 2005, 07:58 AM
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Two Wheeled Type4 Completed!
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4th


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ArtechnikA
post Apr 27 2005, 08:07 AM
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and don't forget that one of those holes - i can't recall if it's the bellows bracket or the pulley - is a *through hole* into the case.

if you remove those parts and don't replace the mounting bolts, you'll have a lovely oil leak...
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tat2dphreak
post Apr 27 2005, 08:22 AM
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thanks for posting this root... it really helps to see what I'm missing:

yea, my engine has the pulley for the thermostat, but no thermostat, and I;ve never seen those flappers before, they just flat weren't on either 914 I've had (IMG:http://www.914world.com/bbs2/html/emoticons/headbang.gif) (IMG:http://www.914world.com/bbs2/html/emoticons/confused24.gif)

Rich, the bolts are there I think, there's no leak.

it looks to me like I need to get the whole thing... but I may "rig" something on the 3-4 side first, until I can pull the engine and the tin to install all of this... correct me if I am wrong, but it looks like the 1-2 side would just not warm as fast(may cause a little extra wear) BUT if the 3-4 side doesn't have the flapper the air never gets to those cylinders... causing it to warm up faster, but get hotter than normal! (IMG:http://www.914world.com/bbs2/html/emoticons/ohmy.gif)

any idea WHY someone in Houston would have taken this stuff off?! from what I understand he was a porsche guy and knew these cars well... I bought the car from a friend who bought it from him... my friend never drove it(duh) and only owned it a few days...
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URY914
post Apr 27 2005, 08:24 AM
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QUOTE (ArtechnikA @ Apr 27 2005, 06:07 AM)
and don't forget that one of those holes - i can't recall if it's the bellows bracket or the pulley - is a *thourgh hole* into the case.

if you remove those parts and don't replace the mounting bolts, you'll have a lovely oil leak...

I think it is the pulley hole.

Ask me how I know. (IMG:http://www.914world.com/bbs2/html/emoticons/rolleyes.gif)

Paul
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root
post Apr 27 2005, 08:29 AM
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QUOTE
if you remove those parts and don't replace the mounting bolts, you'll have a lovely oil leak..
I think Ury's right - pulley hole open = oil...

(IMG:http://www.914world.com/bbs2/html/emoticons/cool_shades.gif)
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tat2dphreak
post Apr 27 2005, 08:31 AM
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QUOTE (root @ Apr 27 2005, 09:29 AM)
QUOTE
if you remove those parts and don't replace the mounting bolts, you'll have a lovely oil leak..
I think Ury's right - pulley hole open = oil...

(IMG:http://www.914world.com/bbs2/html/emoticons/cool_shades.gif)

probably why the pulley is there and nothing else...
(IMG:http://www.914world.com/bbs2/html/emoticons/dry.gif)
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Gint
post Apr 27 2005, 09:20 AM
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Somebody PM me when this thread plays out and I'll put it in the Classics forum.

Nice work.
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URY914
post Apr 27 2005, 09:27 AM
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Is it really magnesium?
I just thought it was just cast aluminum.

Paul
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root
post Apr 27 2005, 11:14 AM
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An old Porsche mechanic told me that it was Mg, (he's actually older than me)!
Does anybody know for sure? (IMG:http://www.914world.com/bbs2/html/emoticons/idea.gif)
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Aaron Cox
post Apr 27 2005, 11:16 AM
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QUOTE (root @ Apr 27 2005, 10:14 AM)
An old Porsche mechanic told me that it was Mg, (he's actually older than me)!
Does anybody know for sure? (IMG:http://www.914world.com/bbs2/html/emoticons/idea.gif)

does it light on fire? are you unable to put it put with water?

if so- its magnesium... (IMG:http://www.914world.com/bbs2/html/emoticons/biggrin.gif)
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ArtechnikA
post Apr 27 2005, 11:19 AM
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it acts and feels like a magnesium alloy; certainly it's weak and brittle enough.

aluminum will burn too, in the right circumstances - check out Thermite...
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Borderline
post Apr 27 2005, 11:28 AM
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I have a question..... in the photos the lower right had side (bottom passenger side) there is a port for air to exit the housing. On my 72 1.7 it seems to be joining the heating system. What's going on??? Why would cooling air be diverted from the engine to be sent to the passenger compartment. And more importantly, if I block it off will the engine run cooler?? (IMG:http://www.914world.com/bbs2/html/emoticons/wacko.gif) (IMG:http://www.914world.com/bbs2/html/emoticons/wacko.gif)
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mudfoot76
post Apr 27 2005, 11:41 AM
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QUOTE (tat2dphreak @ Apr 27 2005, 09:22 AM)
any idea WHY someone in Houston would have taken this stuff off?! from what I understand he was a porsche guy and knew these cars well...

Never underestimate the capacity for a DAPO to do things that leave you pondering just how much of a DA the PO actually was (IMG:http://www.914world.com/bbs2/html/emoticons/dry.gif)
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Reiche
post Apr 27 2005, 12:18 PM
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QUOTE (Borderline @ Apr 27 2005, 09:28 AM)
I have a question..... in the photos the lower right had side (bottom passenger side) there is a port for air to exit the housing.  On my 72 1.7 it seems to be joining the heating system.  What's going on???  Why would cooling air be diverted from the engine to be sent to the passenger compartment.  And more importantly, if I block it off will the engine run cooler?? (IMG:http://www.914world.com/bbs2/html/emoticons/wacko.gif)

There are outlets for heater connections on both sides. Engine air is always being pushed through the heat exchangers, but it only reaches the passenger compartment when the heater control lever is pulled up. Otherwise it gets dumped out the flapper boxes under the car. Unless you have an auxiliary heater fan, that's the only way heated air gets to you.

Jake Raby sez blocking the outlets makes cooling worse. Apparently he tested this while working on his DTM. My wild guess as to why: All the auxiliary air take-offs from the plenum come from the 3&4 side (pass. on 914): alternator, oil cooler, and heat exchangers (see the j-shaped outlet on the left by the alternator bracket, and the hole just above it for the alt. air) The diverter tins, air plenum and cooling system volumes are tuned for this airflow. If you block off the outlets, you increase the pressure inside that half of the system past what is was designed for, the air mass stagnates and doesn't move through the heads/cylinders the way it's supposed to.

Again, this is all happening on the 3&4 side, which already cools worse than the 1&2 side. So messing with these makes the temp differential side-to-side even more pronounced.
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tat2dphreak
post Apr 27 2005, 12:27 PM
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one more thing... why are the thermostats NLA?! it *LOOKS* similar to a beetle stat, can they be interchanged? (IMG:http://www.914world.com/bbs2/html/emoticons/confused24.gif)
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Dave_Darling
post Apr 27 2005, 12:43 PM
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QUOTE (tat2dphreak @ Apr 27 2005, 06:22 AM)
any idea WHY someone in Houston would have taken this stuff off?!

'Cuz ever'body knows them flaps just gits in the way! We alluz pull 'em--an' if the motor runs so hot without the flaps, it must'a bin runnin' even hotter with 'em!! (IMG:http://www.914world.com/bbs2/html/emoticons/rolleyes.gif) (IMG:http://www.914world.com/bbs2/html/emoticons/screwy.gif)

--DD
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ThinAir
post Apr 27 2005, 01:58 PM
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QUOTE (tat2dphreak @ Apr 27 2005, 07:22 AM)
any idea WHY someone in Houston would have taken this stuff off?! from what I understand he was a porsche guy and knew these cars well...

The purpose of the flaps is to help the engine warm up and to maintain proper temperature. They are built so that if the thermostat cable breaks they will go to the wide open position so that you don't overheat the engine.

I think this is what has lead some folks to think that it is ok to remove these flaps. They can't imagine a situation where an air-cooled engine could be running too cool. I live at 7,000 feet so cool mornings are a reality for me, but more important - I think the engineers at VW/Porsche actually had a clue when they designed this stuff. It may be a crude way of maintaining engine temps compared to today's water cooled/electronic beasts, but it does the job at some level. I ALWAYS make sure the flaps are in place and that the system is working properly.
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