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Re: Replace bellows thermostat with a water-type
Posted by: Peeeot ()
Date: May 09, 2019 09:00PM

Today was my first test drive with the water thermostats installed. As far as I can tell, they are working perfectly; however, I have no experience with the stock units. I should also note that my car doesn’t currently have the rearmost engine compartment seal installed.

What I observed is that idling in the driveway with the hood open took a long time for the thermostat doors to open more than a little bit. If I closed the hood and went for a little drive around the block, when I got back in the driveway and looked I found the doors fully open. If I turn the engine off, the doors start to close pretty soon. With the doors mostly shut and heat recirculating in the compartment, hood open, the air felt hot but not burning hot. Might be worth sticking a thermometer in the heated air to see exactly how hot it’s getting, but I would guess around 200 degrees.

Anyway, I will continue to use them and observe. One thing that seems clear: the engine will run considerably cooler and warm up considerably slower without them under most circumstances.

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Re: Replace bellows thermostat with a water-type
Posted by: Peeeot ()
Date: May 15, 2019 07:15PM

So, can anyone fill me in on what is normal behavior for a correctly functioning stock thermostat? I’d like to know:

How long does it take them to open in cold, moderate, and hot weather?
Do they always open all the way?
If the weather is cool or cold, might they stay closed at idle?
How soon after shutdown do they close?

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Re: Replace bellows thermostat with a water-type
Posted by: MattNall ()
Date: May 15, 2019 07:29PM

Drivers side always opens first... and will open below highway speeds...

Passenger side only opens at highway speeds and normally closes before you can get out and look.


Normally the Bellows starts moving around 200f and is fully open at 225f

MODERATOR
Sea Mountain, between Charleston Harbor and Coos Bay! SW Oregon Coast
Click HERE for My Website...Click HERE for My TechPages!
..............................110-PG.................................................Webered-Turbo

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Re: Replace bellows thermostat with a water-type
Posted by: Johnnya101 ()
Date: May 16, 2019 10:41AM

I only have my new drivers thermostat installed right now and it will be halfway open after about five minutes of light driving in 55 degree weather, and after ten minutes it is fully open.

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Re: Replace bellows thermostat with a water-type
Posted by: MattNall ()
Date: May 16, 2019 12:16PM

Sounds normal Johnny...

MODERATOR
Sea Mountain, between Charleston Harbor and Coos Bay! SW Oregon Coast
Click HERE for My Website...Click HERE for My TechPages!
..............................110-PG.................................................Webered-Turbo

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Re: Replace bellows thermostat with a water-type
Posted by: 66vairman ()
Date: May 16, 2019 10:55PM

Agree with Matt's observations.

After a couple NEW thermostats failed I bought good used ones - affordable and work fine. When the used ones are not available I'll consider a mod, but for now it's the easiest fix for me.

I've had "water pumper" thermostats fail and they always fail CLOSED causing an overheat, not good.

Corvair thermostats always fail OPEN, much safer since air cooled engines don't tolerate overheating.

Just me.

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Re: Replace bellows thermostat with a water-type
Posted by: Peeeot ()
Date: July 13, 2019 05:09PM

Since there’s been some fresh thermostat conversation lately, just thought I’d post an update on this modification. I have had these water thermostats in for 2 months now in the NC heat and have put a thousand miles or so on the car. The thermostats are still opening and closing equally on both sides and I have not observed any signs of overheating or thermostat failure.

1963 convertible - 102hp - 4-spd - 3.27 posi - central NC

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Re: Replace bellows thermostat with a water-type
Posted by: MattNall ()
Date: July 13, 2019 06:18PM

Great!

MODERATOR
Sea Mountain, between Charleston Harbor and Coos Bay! SW Oregon Coast
Click HERE for My Website...Click HERE for My TechPages!
..............................110-PG.................................................Webered-Turbo

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Re: Replace bellows thermostat with a water-type
Posted by: jjohnsonjo ()
Date: July 14, 2019 05:23AM

MattNall Wrote:
-------------------------------------------------------
> Drivers side always opens first... and will open below highway speeds...
>
> Passenger side only opens at highway speeds and normally closes before you can get out and look.
>
>
> Normally the Bellows starts moving around 200f and is fully open at 225f



Matt, that's not how my turbo works. When I pull in the drive on a on summer day, they are both open and stay that way while idling to open the garage door.

J.O.

65 Corsa Turbo Vert
79 Honda XL 500S
69 Honda CL 160 D
2010 BMW F 650 GS
2003 Bounder 36D
2013 KIA Optima SX turbo-AKA ZIPPY (wife,s car)
69 Newport Holiday Sailboat
Baja 150 dune buggy cart
Coleman HS 500 UTV
2016 KIA Sorento SXL Turbo

Bethlehem,Pa


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Re: Replace bellows thermostat with a water-type
Posted by: MattNall ()
Date: July 14, 2019 07:29AM

Interesting! Must be hot!

MODERATOR
Sea Mountain, between Charleston Harbor and Coos Bay! SW Oregon Coast
Click HERE for My Website...Click HERE for My TechPages!
..............................110-PG.................................................Webered-Turbo

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