HOW TO DO AN ADVANCED SEARCH.

Mon Jul 08, 2013 3:56 pm by Admin


For the benefit of 944Hybrids users there are two search functions available for you to use.
The purpose of this sticky is to explain the "Advanced Search" function because it is much more powerful and is the best choice when researching information.

When you log on to the site a list of options is shown in a line at the top of the page. One option is labelled "Search", use this option (NOT the search box lower down on the right).

After you click on the upper search option, a drop down box appears. At the bottom of this box is a radio button marked "Advanced …

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Cooling System

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Cooling System

Post  Luke714 on Thu Jul 22, 2010 6:22 pm

Hello,

I have bought a Griffin Radiator (1-26201-x) and I now need to run the coolant hoses to the water pump, Porsche expansion tank, heater core, etc. I have never done this before and I was hoping that someone could tell me a good source for research and/or a diagram that shows hose routing.

Any help getting started would be helpful,

Thanks
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Re: Cooling System

Post  Porch on Thu Jul 22, 2010 7:11 pm

Do you have the manual? I think my heater hose diagram made it into there. Should make that part real easy!

As for the rest, post some pictures and we'll take it from there.
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Re: Cooling System

Post  Luke714 on Thu Jul 22, 2010 8:39 pm

I do have a manual, but it doesn't have any such diagram. Maybe it's in a newer version. I'll take lots of pictures this weekend and try to come up with how I think it should be done and then I'll get some opinions. Could you send me your diagram?

Thanks!
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Re: Cooling System

Post  Porch on Thu Jul 22, 2010 11:45 pm

Oh man! I hate to toot my own horn, but that should have definitely made the cut into the manual.

Here's the heater hose instructions, with part numbers:
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Thought i would share how i did my heater hoses with an LS1.

I bought all parts at Autozone, so these are Autozone part numbers.

Heater control valve: 5930 ($12). This valve recirculates only when the diaphragm receives vacuum. It allows coolant to the heater core when there's no vacuum. I haven't plumbed the vacuum yet, so i'm not sure if this will be a problem or not--if anyone has any comments or suggestions to that end, please post them here!

Long hoses:
M-4106 (5/8 )
L-4204 (3/4)

Bends @ Waterpump:
M-4343 (3/4)
M-4340 (5/8 )

I also purchased some Goodyear brand coils that Autozone sells ($6 each) to make the turn around the cylinder head (see picture). Though not necessary, they're certainly helpful.

Start at the heater core and work your way forward, the L-4204 hose will be the determining factor in where your control valve sits. I'll let you decide where and what to cut off...i removed ~1" on the hoses where they go in to the heater core to start.

Any questions, lemme know!
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Re: Cooling System

Post  gt1scca on Fri Jul 23, 2010 12:33 am

Porch wrote:...that should have definitely made the cut into the manual.
The part numbers posted above are in the shopping lists...
Radiator hoses (for the Turbo radiator) are there also.

No pictures - I thought hoses should be fairly straight forward.

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Re: Cooling System

Post  Luke714 on Fri Jul 23, 2010 5:24 am

Ok, thanks. That's just what I've been looking for. I'll still have questions I'm sure. Did you get the vacuum motor to work? Also, I was reading through the thread and they mentioned another vacuum motor valve that shuts the flow off to the heater core. We don't want that to happen ever so did you just cut the line to it and the valve is normally open?


Last edited by Luke714 on Fri Jul 23, 2010 5:34 am; edited 1 time in total
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Re: Cooling System

Post  Luke714 on Fri Jul 23, 2010 5:28 am

Since I have a Griffin radiator that has it's own fill cap I don't even need the Porsche expansion tank, right? If I do how would I plum it in? The little hose at the cap could go to a dip tube in a smaller tank though.

Thanks again, I'll be able to talk a little more intelligently about this after the weekend hopefully.
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Re: Cooling System

Post  Porch on Fri Jul 23, 2010 10:56 am

The way this heater valve works is that when it's closed it just recirculates the water instead of allowing it into the heater core. It never stops the water from flowing.

You'll still have to run the coolant tank on the 944, because your radiator cap won't be "high enough" in the system (the radiator cap needs to be the highest point).
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Re: Cooling System

Post  Luke714 on Fri Jul 23, 2010 11:14 am

I know that is the case for the H valve you have spec'd, I was referring to the below. It sounded like there was a second valve under the dash that I had to disable.


matthewb wrote:
Is the heater valve under the dash for a damper to close off the heat or does it have a valve in the coolant flow? My 86 944 had a valve on the engine bay side of the wall in one of the coolant lines. What is the function of the heater valve under the dash?


The Porsche valve stops coolant flow so the core will bleed off it's heat and it goes cold. Thats a no-no with the Chevy stuff since they require constant flow, so when the heater is off the H cycles the coolant back into the water pump.
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Re: Cooling System

Post  Porch on Fri Jul 23, 2010 12:33 pm

Ahhh, i see!
I've never quite figured out (or really, spent the time to figure out) the vacuum system on that part of the car. If anyone has a 100% working setup i'd love to copy it.
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Re: Cooling System

Post  Luke714 on Fri Jul 23, 2010 2:16 pm

right, but since the H-valve is before the other vacuum motor it doesn't matter (duh, I guess but I didn't think of that until just now). How did you hook vacuum up to the H-valve?
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Re: Cooling System

Post  Porch on Fri Jul 23, 2010 3:11 pm

Well, that's the other part i got lazy on. Generally in the summer i leave it disconnected (recirc), and during the winter i give it a constant vacuum source. I don't know, just always had bigger fish to fry on the car, i guess.
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Re: Cooling System

Post  gt1scca on Mon Jul 26, 2010 12:31 am

Porch wrote:...that should have definitely made the cut into the manual.
New page...

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Thanks Chris.

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Re: Cooling System

Post  Luke714 on Mon Jul 26, 2010 3:32 pm

haha, I can understand that. I don't think it'll be a big priority for me, but I plan on driving it a little this fall and being in Maine I'll need some heat.
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Re: Cooling System

Post  Porch on Mon Jul 26, 2010 3:45 pm

Oh cool! Thanks Greg Smile
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Re: Cooling System

Post  Bluemach1 on Mon Jul 26, 2010 6:44 pm

Interesting. Where can an appropriate vacuum be pulled from so that this opens and closes appropriately?

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Re: Cooling System

Post  Luke714 on Tue Jul 27, 2010 10:08 pm

Where do you find those hoses, are they even part numbers? They don't show up on Summit or anything.
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Re: Cooling System

Post  spence on Wed Jul 28, 2010 4:49 am

I think Greg said they're autozone part numbers
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Re: Cooling System

Post  Luke714 on Wed Jul 28, 2010 5:51 am

Thanks,

I can't find them on their site, but they do have a huge selection of heater hoses so I'll stop at a store on my way home and see if they can help me out.
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Re: Cooling System

Post  spence on Wed Jul 28, 2010 6:13 am

I wish they where listed online.... Cause there's not an Autozone in Canada....
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Re: Cooling System

Post  Dawgz83948 on Wed Jul 28, 2010 9:12 am

Is there an Autozone-ay? Very Happy
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Re: Cooling System

Post  spence on Wed Jul 28, 2010 9:16 am

You mean eh? LOL I serisously don't even know anybody that talks like that.... Maybe way up north in Alberta or something....
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Re: Cooling System

Post  Dawgz83948 on Wed Jul 28, 2010 10:13 am

That would not be too hard to wire to a soleniod and a switch so you can trigger vacuum (or not) from the cabin.
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Re: Cooling System

Post  Porch on Wed Jul 28, 2010 10:21 am

Only people from certain parts of Canada say "eh" Smile

Well crap! I can't find those part numbers anywhere either. Autozone's website seems to imply that they switched to Dayco brand heater hoses. The numbers i gave were for Kelley Springfield (Goodyears budget brand). If someone goes to the store with those part numbers, i'm sure they'll have a book somewhere that could be used to get the Dayco part numbers, but i can't seem to find anything online.
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Re: Cooling System

Post  Bluemach1 on Wed Jul 28, 2010 11:05 am

I read through the post linked to the old board. It looks like the exact same thread is being created here. The question was never resolved over there for vaccum control there either. Is there a way to figure this out definitively?

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Re: Cooling System

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