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Old 10-15-2004, 18:02   #1 (permalink)
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Thermostat

What brand, style and temp rating of thermostat is everyone running ? I've been searching and the original ones from ford are no longer available, tridon have a std unit and a high flow unit, that look like a regular design and different temp ratings available. Then in dayco the unit for the cleveland is a high flow unit, is available only in a 82c, but is a fully enclosed unit with the opening section being enclosed within a shroud.
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Old 10-15-2004, 19:48   #2 (permalink)
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Re: Thermostat

I use an 82 degree thermostat, it makes the gauge run right in the middle. The standard one is an 88 degrees which I also have, I think only Motorcraft make them because I tried to buy one and was told they only come in 91. I have a 71 as well which I had in my car for about a week, which one were you after??
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Old 10-15-2004, 20:47   #3 (permalink)
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Re: Thermostat

No, I'm not chasing one, I'm just wondering what thermostats people have been using and and with what degree of reliability they have had. Are the high flow better ? Are the enclosed units better ? What temp ratings have people found to be better for std or mild or wild clevelands
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Old 10-16-2004, 03:21   #4 (permalink)
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Re: Thermostat

I don't run a thermostat and haven't for 15 years , I knocked the centre out of a thermostat and finish up with just the centre hole ( ABOUT 1" DIA ) this acts as a restrictor and is fine .
Runs just under 160* in winter and around 180* in summer and no risk of a jammed thermo. destroying an engine .
A $15 thermostat can ruin an expensive engine . Anyone living in QLD , and running a carburetor engine doesn't need to run a thermo , I know I will get some critisism , but it works .
Try it , you can even vary the exercise and make up some restricors out of sheet metal with different size holes .

Cheers .
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Old 10-16-2004, 07:21   #5 (permalink)
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Re: Thermostat

Hello 01fm.
I tried several types of thermostats without a great deal of success at reducing overheating at idle. The actual thermostat for a Clevo is a bypass thermostat with a little hat crimped on underneath. Tried a bypass thermostat made by Tridon-still have it lying around in the garage-designed for the Clevo. Did not handle increased pressure from a high flow waterpump installed at the same time.
Currently have a Robertshaw 180 F Cleveland thermostat installed. These were the original thermostats put in the Clevelands at the factory and offered in 180 F and 192 F. If you get your hands on an old Gregory's repair manual you can see the Robertshaw thermostat. Heavy, well made thermostat that has high flow and is not bothered by increased pressure. Imported several Robertshaws with my Flowkooler waterpump earlier this year. It has been the best thermostat I have used by far.
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Old 10-16-2004, 15:53   #6 (permalink)
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Re: Thermostat

Quote:
Originally Posted by 460BBXW
I don't run a thermostat and haven't for 15 years , I knocked the centre out of a thermostat and finish up with just the centre hole ( ABOUT 1" DIA ) this acts as a restrictor and is fine .
Runs just under 160* in winter and around 180* in summer and no risk of a jammed thermo. destroying an engine .
A $15 thermostat can ruin an expensive engine . Anyone living in QLD , and running a carburetor engine doesn't need to run a thermo , I know I will get some critisism , but it works .
Try it , you can even vary the exercise and make up some restricors out of sheet metal with different size holes .

Cheers .
I spent several years running no thermostat, but got sick of it taking so long for my motor to warm up, and i live in Cairns. Also, after i stripped my motor that only did about 20000 km, it had a decent lip on the top of all the bores.
My last motor with the thermostat still had all the hone marks after 20000 km.
I have had no luck with the Tridon high flow 180deg thermostat and it ran way too hot. I ended up using some cheap shitty brand(non high flow) 160 deg and all works perfectly. I ran my brand new motor/cam in for 30 minutes at 2500 rpm last weekend and it didnt get over 190 deg, but i do have a good rad.
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Old 10-16-2004, 16:31   #7 (permalink)
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Re: Thermostat

Hey Guys, Just one of my main concerns with the thermostat issue is looking into the block you see a restrictor/bypass plate pressed in. Now according to everything I've read when the thermostat is closed water is able to flow within the engine via through this plate. When the engine comes up to temperature and the thermostat opens, this plate is then closed off and the flow of water then travels through the radiator. With no thermostat and no proper bypass blockoff on the bottom of the thermostat a percentage of the water is unable to go through the radiator, and there for stays within the block, hence higher running temp.
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Old 10-19-2004, 03:47   #8 (permalink)
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Re: Thermostat

Fellas

This may or may not be of any consequence but xdc351 and I were discussing thermostats a while back. It was mentioned that many a Clevo owner may actually be running Windsor style thermostats ????

The Clevo ones have a slight "lip" on the flat surface that sits on the block. This lip is what creates a seal and prevents the water from recycling back into the block where it should actually flow into the rad. I'm not sure of the "truth" of this but I guess it makes sense.

The mistake that some people make is that they ask for a thermostat for a 351 - 302 falcon and sometimes end up with a Windsor type unit. These units are different and don't seal the same which "may" cause some clevos to overheat despite all the best attempts by the owner.

Maybe someone else can comment on the validity of this ?????
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Old 10-19-2004, 04:17   #9 (permalink)
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Re: Thermostat

I got a dayco unit ( Part No: DT66A) in today at work and on the base of the plunger is a small extra lip, this is what is obviously designed to seal the bypass plate. None of the others that we sell have this extra piece on them. Looks like I'll be putting these into stock for clevelands from now on. The only thing being is that they only come as a 82c.
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Old 10-19-2004, 04:34   #10 (permalink)
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Re: Thermostat

ESP, I don't know WTF I was on that night.... its the other side of the thermostat thats different.... WAY different. I just pulled the old thermostat from the engine and compared to the cleveland one its clear the clevo ones are a special breed.

The base is at least 10mm wider but strangely enough its actually shorter. The spring is also wound much tighter and the opening in the thermostat is 2-3mm wider as well. the brass sliding pin is larger in diamiter. Time will tell but I still believe buying the wrong thermostat is 10x worse than running none at all. My overheating problems only began after I installed the previous 'stat.
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