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> Cooling Flaps
cdadaa
post Oct 24 2010, 10:37 AM
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Hi,

Is this the correct positioning for the cooling flaps with a cold unexpanded bellows?

Somehow I think the rod may have been bent or the flaps twisted by the previous owner. I want to hook up the thermostat so I can have a wintertime heater.

Thanks...Dan


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Sleepin
post Oct 24 2010, 11:07 AM
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That is the hot position IIRC.
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StratPlayer
post Oct 24 2010, 11:11 AM
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Thermostat cable connects with the connector in the down position...
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cdadaa
post Oct 24 2010, 11:21 AM
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So the flaps are both "up" or closed like this? As such, I will bring more cable through...correct?

Thanks...Dan


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Cap'n Krusty
post Oct 24 2010, 11:53 AM
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The system in question has ABSOLUTELY NOTHING to do with your having a heater this winter, or any other time.

The Cap'n
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cdadaa
post Oct 24 2010, 12:04 PM
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That wasn't my question Mr. Cap'n!
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Jake Raby
post Oct 24 2010, 12:56 PM
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In the HOT position the diverter over the oil cooler closes down over the top of the cooler.. This directs air into and through the cooler only when the engine is at temperature.

If the diverter doesn't close completely over the cooler air will escape and oil temps will be elevated.

I check this function with a heat gun with the engine on the bench and the cooling tin off as it is critical.

I did a video of this when I built the most recent engine for my 912E, I might edit and share it sometime.
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Cap'n Krusty
post Oct 24 2010, 03:37 PM
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QUOTE(cdadaa @ Oct 24 2010, 11:04 AM) *

That wasn't my question Mr. Cap'n!



Oh? "I want to hook up the thermostat so I can have a wintertime heater."

The Cap'n
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AndyB
post Oct 24 2010, 03:39 PM
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(IMG:style_emoticons/default/popcorn[1].gif)
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cdadaa
post Oct 24 2010, 05:31 PM
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Thanks Jake...that makes sense. I'm good to go. I'll check it with a heat gun before I install the cylinder tins.

Dan
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gasman
post Oct 24 2010, 05:41 PM
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Looks like you have the heads on the wrong sides....Cht belongs on passenger side.....if your going to carbs...no problem....If FI, you might have to run a wire from harness to CHT...Just an observation
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cdadaa
post Oct 24 2010, 05:53 PM
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Look again...I believe the CHT is on the passenger side. The photo was taken from the flywheel (engine rear, front of car) side. BTW, this is going in a 912E.
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ziggy
post May 9 2011, 08:25 PM
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Were the cable running to the thermo to break, would the flaps default to the full hot position? I'm in Texas and running hot and noticed that little arm doesn't ever move as far as it is in his picture above. (the hot position photo)
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SirAndy
post May 9 2011, 09:14 PM
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QUOTE(cdadaa @ Oct 24 2010, 04:53 PM) *
BTW, this is going in a 912E.

And we knew that because .... ? (IMG:style_emoticons/default/confused24.gif)
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McMark
post May 10 2011, 12:00 AM
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ONLY attach the wire with the flaps in this position if you're sure the thermostat bellows are functioning. If your bellows have failed you will be setting up the motor for a MELTDOWN.

(IMG:http://www.914world.com/bbs2/uploads/post-10402-1287940846_thumb.jpg)
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914Mike
post May 10 2011, 01:20 AM
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QUOTE(McMark @ May 9 2011, 10:00 PM) *

ONLY attach the wire with the flaps in this position if you're sure the thermostat bellows are functioning. If your bellows have failed you will be setting up the motor for a MELTDOWN.


Yep, BTDT (in a former life...) Connecting the cable with the flaps in that position pretty much guarantees a meltdown, whether the bellows is working or not...

It's more important that the flaps OPEN fully than it is that they CLOSE fully!

The technique for setting the cable clamp is to remove the bellows mounting bolt so the bellows can follow the cable when you pull it up. (The bracket acts as the stop for it.)
The flaps need to be in the fully "open" or "hot" position when you tighten the cable clamp. (That's the position it is pulled to by the springs, so you don't need to move it if it is not binding.) Then pull the bellows back to it's mounting bolt and tighten the bolt. The cable will have pulled the flaps partly open.)

This way makes sure that the flaps are fully open when the bellows expands as much as the bracket will allow it to. They only close as much as the contracting bellows can pull them against the springs on the rod.
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jaxdream
post May 10 2011, 07:33 AM
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QUOTE(cdadaa @ Oct 24 2010, 03:53 PM) *

Look again...I believe the CHT is on the passenger side. The photo was taken from the flywheel (engine rear, front of car) side. BTW, this is going in a 912E.


Ok for the position of the engine in the 912E- Yes ( passenger side ) , position for the CHT sender to operate with Fuel Injection- NO , the CHT needs to be over the Number 3 cylinder to capture the hotest cylinder -per Porsche / VW configuration.
We ( the forum members ) are trying to help with some advise . Good Luck , and do hope you get it running well.

Jack / Jaxdream
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TheCabinetmaker
post May 10 2011, 08:18 AM
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QUOTE(gasman @ Oct 24 2010, 05:41 PM) *

Looks like you have the heads on the wrong sides....Cht belongs on passenger side.....if your going to carbs...no problem....If FI, you might have to run a wire from harness to CHT...Just an observation



QUOTE(cdadaa @ Oct 24 2010, 05:53 PM) *

Look again...I believe the CHT is on the passenger side. The photo was taken from the flywheel (engine rear, front of car) side. BTW, this is going in a 912E.



QUOTE(jaxdream @ May 10 2011, 07:33 AM) *

QUOTE(cdadaa @ Oct 24 2010, 03:53 PM) *

Look again...I believe the CHT is on the passenger side. The photo was taken from the flywheel (engine rear, front of car) side. BTW, this is going in a 912E.


Ok for the position of the engine in the 912E- Yes ( passenger side ) , position for the CHT sender to operate with Fuel Injection- NO , the CHT needs to be over the Number 3 cylinder to capture the hotest cylinder -per Porsche / VW configuration.
We ( the forum members ) are trying to help with some advise . Good Luck , and do hope you get it running well.

Jack / Jaxdream



They aren't trying to bust your balls. They are trying to help you save an engine. Your CHT is on the #2 cylinder. It belongs on the #3 cylinder. We can clearly see it on the drivers side. Take the time to take it apart and reassemble the it the correct way now while its only a few hour job. Haste makes waste. (IMG:style_emoticons/default/beerchug.gif)
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sean_v8_914
post May 10 2011, 09:33 AM
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Jake was being subtle. write it on a calendar and take a picture.
your flap over teh cooler is tweeked in teh hot position and will not do its job . please fix it.
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McMark
post May 10 2011, 10:43 AM
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QUOTE(sean_v8_914 @ May 10 2011, 08:33 AM) *

Jake was being subtle. write it on a calendar and take a picture.
your flap over teh cooler is tweeked in teh hot position and will not do its job . please fix it.

Good catch, Sean. (IMG:style_emoticons/default/thumb3d.gif)


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