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Old 11-11-2012, 07:10 AM   #1 (permalink)
Soaper
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which thermostat to get??

Not dealing with the run around my chevy parts counter does. So acdelco is out.
Not gonna use a stant from napa cause stant blows...
Just wandering whats a good thermostat through oriellys?? Or any parts store chain.
Also ive read some BBC tstats work??? More highflowing last i read... which one? And brand?

Thanks guys,
Changing the tstat in the van has been a treat by itself

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Old 11-11-2012, 07:15 AM   #2 (permalink)
Soaper
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Actually. Scratch what i said... which big block chevy tstat works... regular parts stores dont carry 196*tstats for 6.2.....

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Old 11-11-2012, 07:44 AM   #3 (permalink)
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Without the AC Delco option, I think they all suck, I have tired them all and none work like the AC does, so with that option off the table I say use what ever you can get as anything other than the AC unit isn't going to work right for you.... A 50$ AC unit will be what you will want when it's all said and done...

Nothing will work but one for the 6.2 motor, they are made different than the gasser ones..
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Old 11-11-2012, 09:09 AM   #4 (permalink)
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Quote:
Originally Posted by sctrailrider View Post
Nothing will work but one for the 6.2 motor, they are made different than the gasser ones..
That is not true. The thermostat for big-block Mopars from the 60s-70s is the correct size and correct flow. If you wanted a lower temp thermstat - the Mopar is the one to use. Summit Racing sells them as do many other places. If you want the correct temp for the 6.2, NAPA sells the correct high-flow thermostat at 195 F. Years back NAPA was selling low-temp Stand Superstats at low temps for 6.2, but no more. THEY were the low-flow units.
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1982 K10 PU 6.2 diesel,1983 (two) Blazers 6.2 diesel, TH400, 1983 K5 Blazer with 6.2 diesel, 4sp man. OD trans. and Chalet pop-up camper body.
1986 K5 Blazer 6.2 diesel, 700R4 trans.- with Halmark pop-up camper body.
1987 V20 4WD Suburban 6.2 diesel, 1988 K5 Blazer 6.2 diesel, 700R4. 1989 GMC 3/4 ton, 4WD Suburban, 6.2 diesel, TH400 trans.
1991 Suburban 4WD 6.2 diesel 700R4 trans.
1981 (two of them) Chevy Chevette with 1.8 diesel and 5 sp. trans.
1985 Isuzu P'UP 4WD pickup with 2.2 diesel
1991 (Two of them) Volkswagen Jetta 1.6 diesel
1985 Ford F250 4WD ex-cab, longbed, 6.9 diesel
1994 Ford F250 4WD ex-cab, longbed, 7.3 IDI turbodiesel.
1983 Mercedes 300D five-cylinder turbo-diesel
1992 Dodge D200 4WD Cummins turbo-diesel, intercooled with 5 spd Gertrag
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Old 11-11-2012, 09:26 AM   #5 (permalink)
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Well I just bought one of those from NAPA 2 weeks ago, once it opened the first time, it wouldn't close and motor temp fell, I took it out and dropped it in a pan of boiling water, it opened and I sat it on the counter and it didn't close until I put it in the fridge.... I picked up a AC unit and all is good again, just my experience with them, the 2 looked the same but didn't work the same.
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Old 11-11-2012, 09:40 AM   #6 (permalink)
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Quote:
Originally Posted by sctrailrider View Post
Well I just bought one of those from NAPA 2 weeks ago, once it opened the first time, it wouldn't close and motor temp fell, I took it out and dropped it in a pan of boiling water, it opened and I sat it on the counter and it didn't close until I put it in the fridge.... I picked up a AC unit and all is good again, just my experience with them, the 2 looked the same but didn't work the same.
One bad experience from one store is simply anecdotal and proves nothing. I've bought the correct stat many times from NAPA after doing my own research. The Stant stat won't work. The Robert Shaw does.


You didn't mention what part # you got from NAPA. The AC Delco OEM stat for a 6.2 is a Robert Shaw high-flow, dual spring design. The NAPA equivalent is the # 381-190 Robert Shaw style stat at 195 F. If they sold you anything else they are using old books and discontinued part #s.

The same Delco/Shaw high-flow stat to fit a 6.2 is used in racing apps for Mopar big blocks.

1959 to 1971 Mopar 383, 1963-1966 426 Hemi, 1966-1978 440,

Milodon 16406 $15 Thermostat, 180 F Degree, High-Flow, Steel, Chrysler, Dodge, Ford/Plymouth, V8, Each. High-flow thermostats from Milodon greatly aid the correct functioning of a high-performance cooling system. They're engineered to warm the engine to a proper operating temperature without making it run hot enough to lose power. Also, the "Balanced Sleeve" design equalizes the pressures exerted on the thermostat. This counters the undesired effect of increased flow from a high-volume water pump, which actually tends to hold a stat closed.

Mr. Gasket 180F # 4367 $14
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1982 K10 PU 6.2 diesel,1983 (two) Blazers 6.2 diesel, TH400, 1983 K5 Blazer with 6.2 diesel, 4sp man. OD trans. and Chalet pop-up camper body.
1986 K5 Blazer 6.2 diesel, 700R4 trans.- with Halmark pop-up camper body.
1987 V20 4WD Suburban 6.2 diesel, 1988 K5 Blazer 6.2 diesel, 700R4. 1989 GMC 3/4 ton, 4WD Suburban, 6.2 diesel, TH400 trans.
1991 Suburban 4WD 6.2 diesel 700R4 trans.
1981 (two of them) Chevy Chevette with 1.8 diesel and 5 sp. trans.
1985 Isuzu P'UP 4WD pickup with 2.2 diesel
1991 (Two of them) Volkswagen Jetta 1.6 diesel
1985 Ford F250 4WD ex-cab, longbed, 6.9 diesel
1994 Ford F250 4WD ex-cab, longbed, 7.3 IDI turbodiesel.
1983 Mercedes 300D five-cylinder turbo-diesel
1992 Dodge D200 4WD Cummins turbo-diesel, intercooled with 5 spd Gertrag
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Old 11-11-2012, 10:41 AM   #7 (permalink)
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I never looked carefully at a 6.2 crossover but on a 94+ 6.5 you MUST use the AC delco one. All the others do not properly block the bypass and can cause overheating or the heater core not to get supplied properly. I'll take a look at the 6.2 crossover and see if it works the same way.
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Old 11-11-2012, 02:11 PM   #8 (permalink)
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Well, I might have missed something here, I have the single 6.2 crossover, it has the one that blocks the bypass....

And good to know about the other part## , next time I need one I will give it a try..
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Old 11-11-2012, 03:29 PM   #9 (permalink)
jdemaris
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Quote:
Originally Posted by acesneights1 View Post
I never looked carefully at a 6.2 crossover but on a 94+ 6.5 you MUST use the AC delco one. All the others do not properly block the bypass and can cause overheating or the heater core not to get supplied properly. I'll take a look at the 6.2 crossover and see if it works the same way.
I've used the part # 385-190 from NAPA and they've worked fine on twin-stat setups in 6.5s. In fact, the NAPA thermostat looks identical to the one that comes in the Delco box (# 12559336). Both are Robert Shaw style. I wouldn't be surprised if they both come from the same company that makes them.





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1982 K10 PU 6.2 diesel,1983 (two) Blazers 6.2 diesel, TH400, 1983 K5 Blazer with 6.2 diesel, 4sp man. OD trans. and Chalet pop-up camper body.
1986 K5 Blazer 6.2 diesel, 700R4 trans.- with Halmark pop-up camper body.
1987 V20 4WD Suburban 6.2 diesel, 1988 K5 Blazer 6.2 diesel, 700R4. 1989 GMC 3/4 ton, 4WD Suburban, 6.2 diesel, TH400 trans.
1991 Suburban 4WD 6.2 diesel 700R4 trans.
1981 (two of them) Chevy Chevette with 1.8 diesel and 5 sp. trans.
1985 Isuzu P'UP 4WD pickup with 2.2 diesel
1991 (Two of them) Volkswagen Jetta 1.6 diesel
1985 Ford F250 4WD ex-cab, longbed, 6.9 diesel
1994 Ford F250 4WD ex-cab, longbed, 7.3 IDI turbodiesel.
1983 Mercedes 300D five-cylinder turbo-diesel
1992 Dodge D200 4WD Cummins turbo-diesel, intercooled with 5 spd Gertrag
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Old 11-11-2012, 04:30 PM   #10 (permalink)
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OK, those aren't for the 1 stat set up like I have, I must have missed that here. Those won't work with my set up..

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