I have a goodwrench 6.5 that has all 6.2 accessories on it.

Do i ask for a 93 6.5 thermostat or an 86 6.2 thermostat?

It currently has a 180 thermostat which works fine, but i want the stock 190/195 as to heat my oil a little bettter in the winter.

is your coolant cross over from 6.2 or 6.5? that and the water pump should be the only differences i can think of

Whichever one you choose. If no air can pass through the thermostat when it is closed. Take a toothpick pry open the thermostat a bit (where the water goes through when it heats up). Place a small piece of toothpick to keep it slightly open and install it.
You are allowing airbubbles to escape when you start up reducing the chance of having a big air bubble at the water pump. :)

Some people drill a small hole in the thermostat plate to accomplish the same thing, too. Tiny, like 1/16" or so.

Check your local auto parts for a tstat listed for an early model 6.9 Ford diesel. I've heard they will work. Hearsay but worth a look. Anybody else heard this?

Some people drill a small hole in the thermostat plate to accomplish the same thing, too. Tiny, like 1/16" or so.

can someone show a pic of this?? I plan on doing the t stat here shortly and i dont want to drill in the wrong piece....

http://i68.photobucket.com/albums/i29/tigman_photos/diesel/Thermostat002-1.jpg


http://i68.photobucket.com/albums/i29/tigman_photos/diesel/Thermostat001-1.jpg

the one on the right is the right one do not use replacement you wont have heat this winter . the hole trick is for the gas engine if you want heat this winter forget about that . thght seal they ares on diesel engine

fred482 j never ear about the ford t-stat , yet

Ed

If you go to your local parts house to get a thermostat and they have several listed at 7 or 8 bucks, then one for twice that. It's the one that most expensive :rolleyes: Usually, they have to order it.

Auto Zone does not carry the correct one. It looks nothing like a cheap, stamped one for a gas motor.

Thanks Ed, I had heard the 6.9 Ford deal from two or three techs, over the years. I'd not had any personal experience with it. The one you show looks like the heavy duty type that I've seen in many 6.2's. I'd guess it's the factory replacement type.

I know Smmmit Racing lists one for the SBC Chev engines that looks just like yours but it's a smaller diameter, made for the small chev engine. I don't recall the manufacturer but it's a bullet proof piece. I had one in a drag car and it never overheated, always warmed up quickly and never fluctuated temps as it warmed and opened, no cycling of the guage like I've seen so many thermostats do.

RobertShaw....just remembered the manufactorer's name! (old age, again, some more!) I remember that company building all kinds of HD cooling system parts. Maybe they have the correct tstat for the 6.2. If they do, I know it won't be cheap!

I had this dilemma as I was trying to deal with various minor rebuilding issues. If you look at the pics in the other post you will see the one on right has much more flow when open around 190 degrees. THe one on the left looks like the import that is cheap and more restrictive.

If you go to Stant's website and look around stant.com you can find the right thermostat that was designed for our cars. Paying the piper for an american made part for our american car may cost a little more but we all save in the long run.

CHEVROLET
Engines (Diesel) (Continued)
1987-82 6.2L 1 R - - - - - 195F- - - - 14429 *190° Opening temperature.

My ac delco thermostat i just picked up looks like the one on the left and there was no choice at the parts counter. This was at the dealer.....

SO i have no idea how to get the one pictured on the right side.

Hi you make me dig a little bit for that one but here it is

AC Delco Thermostat 131-103

Your dealer may have look in the wrong section maybe gasser section .

IIRC the hummer use the same but twin thermostat



Ed

thanks for that answer tigman. looked on rock auto, $18.30. doesn't come up under 6.2, but if you search part number, it comes up.

listed under 1996 6.5's as well as another delco, this one is the 2n'd generation

Here is a pic of the one I got from my dealer. I paid like $14.

(the one on the right. the left one was in my truck)
http://www.dieselplace.com/forum/garageimage.php?do=full&p=49713&d=1199782751
http://www.dieselplace.com/forum/garageimage.php?do=full&p=49712&d=1199782741

Im pretty sure that larger thermostat is a 6.5 thermostat. I just ordered one. I will take the 6.2 one back.

My ac delco thermostat i just picked up looks like the one on the left and there was no choice at the parts counter. This was at the dealer.....

SO i have no idea how to get the one pictured on the right side.
The dealer screwed up and gave you one for a gasser. The 6.2/6.5 stats look like the one on the right.

The dealer screwed up and gave you one for a gasser. The 6.2/6.5 stats look like the one on the right.

both okeydokey and I were given a gasser thermostat?? Do you think thats possible?

both okeydokey and I were given a gasser thermostat?? Do you think thats possible?
Given some of the people they put behind those parts counters...yes. Not that they are morons, but a lot of them just don't have the necessary experience...I've worked at a few dealerships and ran into it at every one.

thermostat given to me the first time

ACD # 132-55
GM # 14077122

thats the one listed at rock auto for an 86 6.2L as i requested.

They gave me the right one and it also looks like a gasser t stat.

Im putting the 96 6.5 one in anyway.

I had heard the 6.9 Ford deal from two or three techs, over the years. I'd not had any personal experience with it.

I'm using the 6.9 stat in both of our 5.7 olds engines.It does a great job and flows more coolant than the regular NAPA replacement.It cost me around $35 at Ford.The NAPA version allowed the engine temperature to reach 1/2 way as indicated on the guage,while the 6.9 version allowed engine temperature to reach much lower than 1/2 way.

thermostat given to me the first time

ACD # 132-55
GM # 14077122


That is the one I got which is also the part look up numbers on rock auto. Plus the parts guys that work at the dealership here seem to know more than guys at the parts house stores...
It may not be the 'High flow' Tstat, but I have not had any cooling issues with the this one installed.

Hi

AC Delco Thermostat 131-103

is the right stuffit is standard for a 6.5 and fit into hummer twin t-stat . That what my dealer sale me last winter for my 6.2 .

Ed

The other thing I should've mentioned...a lot of the manufacturers will re-number a part and sell it for other applications. Not saying thats what has happened here, but they do it regularly. Expands sales on that part, makes'm more money. Its kinda the "one size fits all" mentallity and it saves them production costs. At any rate, both will work, but my personal experience has proven (to me at least), that the hi-flow is the way to go. I got pretty drastic temp fluctuation with the conventional stat.

wait till i post a pic of the 103...

it doesnt look like either t stat..... alot of rubber on it.

ehhh...no pic yet but i thought id add this

the 6.2 thermostat was $6

the 6.5 one was $21 with my discount!!! Wow...thats a little difference there.....good thing i only have the one on mine.

131-103

http://i102.photobucket.com/albums/m92/JodeanSS/86%20Chevy%20PU/DCP_0004-2.jpg

http://i102.photobucket.com/albums/m92/JodeanSS/86%20Chevy%20PU/DCP_0003-2.jpg

http://i102.photobucket.com/albums/m92/JodeanSS/86%20Chevy%20PU/DCP_0002-2.jpg

http://i102.photobucket.com/albums/m92/JodeanSS/86%20Chevy%20PU/DCP_0001-2.jpg

JODEAN-Is the corded plug a replacement for the block heater? If so, I could use the part number for that, if you would be so kind. Thanks, Mike

The other thing I should've mentioned...a lot of the manufacturers will re-number a part and sell it for other applications. Not saying thats what has happened here, but they do it regularly. Expands sales on that part, makes'm more money. Its kinda the "one size fits all" mentallity and it saves them production costs. At any rate, both will work, but my personal experience has proven (to me at least), that the hi-flow is the way to go. I got pretty drastic temp fluctuation with the conventional stat.You told me to check for fluctuation when I bought the 6.2 Blazer in another thread...You were right! Every time when youfirst start it up it warms up to almost the red mark then falls fast back to the 200 then the needle kinda moves slightly back and forth just enough to catch your eye. So which is the exact part# for the 84 6.2. I will being doing head gaskets soon and am collecting all parts needed. Thanks.

JODEAN-Is the corded plug a replacement for the block heater? If so, I could use the part number for that, if you would be so kind. Thanks, Mike

Its the whole heater setup, but its $19.99

You can see the part number in the pic....its 996246

You can buy just the cord, but as I recall it's $14 for the cord alone anyway, so I just bought the heater as well (mine was leaking anyway).

Well, i dont think 131-103 is the right thermostat.

It is a tad bid smaller and it fits into the neck that hooks to the radiator hose and it moves around about 1/2" in and out. I have no idea if it will seal or if it will stay in place.

Ill try it and find out if it works but it looks like it wont...

Ill probrably have to resort back to the $6 one i had originally and go back and get it from the dealer.

I've been using the cheap thermostats for ages. I drain my coolant every two years and replace the thermostat at the same time. No issues...

I've been using the cheap thermostats for ages. I drain my coolant every two years and replace the thermostat at the same time. No issues...

that could be.....i have a turbo though....ive seen 220F on the temp gauge before....new radiator

I have to let off it to cool it back down, im sure it would get hotter if i kept my foot in it.

Should i even try this thermostat thats flopping around in the housing??

Should i even try this thermostat thats flopping around in the housing??
does it flop around with the seal on it?

does it flop around with the seal on it?

what seal??

this is obviously a smaller t stat.....its for the 6.5

This thing will slide into the neck and then moves in and out a good 1/2" ro so......the neck doesnt clamp it to the crossover housing like the old one.

Im not sure why that part number got posted, but its not the right one.

I just installed a very similar thermostat to mine . The crossover have a grove and there's were you should try your thermostat not on the neck. Mine is #14429 that I ordered from rockauto.com

Im not sure why that part number got posted, but its not the right one.

Hi Jodean i look at your pic and it is not the same t-stat that i have in my box for sure , not even a close copy . the one one my pic is the one i swap for 3 vehicule now (2year) and it still work like a charm . if i get free time i drop by my dealer and try to have an explination about thoses differences with that number .

Ed

thanks tigman

OMG!!! I cant believe a simple t stat swap is this hard. Does anyone know what the deal is?

I just finished all my other coolant line additions (wrapped around the wvo fuel line) so i can go through the cold winter without a problem, and i just wanted to change to a 190 or 195F t stat to get higher temps. I was all done today running and wrapping lines and the dealer parts dept isnt open on sunday.

I called sturdevants and they watned $45 for a t stat and then i called advance and they wanted $20 for one, niether were ac delco. The dealer (when open) wants $6 for the one i had before i was told to get the hi flow 131-103. So i took the $6 one back and spent $20 on the 131-103 that i cant use......its too small.

All i could do was put the old 180F back in but i must of messed something up, now it wont get up to temp but the radiator is hot so it must be stuck open. I forgot which way the tstat is supposed to face.

I thought changing a t stat was easy?? Turns out to be one of the toughest things ive done to the truck.

PLEASE HELP!!!!!!!!!!!!!!!

I think i have 6.2 crossover, not sure. Upper radiator hose on drivers side right?

motor looks just like this....same crossover and t stat housing

http://i102.photobucket.com/albums/m92/JodeanSS/86%20Chevy%20PU/Glow.jpg

I thought changing a t stat was easy?? Turns out to be one of the toughest things ive done to the truck.

PLEASE HELP!!!!!!!!!!!!!!!

I think i have 6.2 crossover, not sure. Upper radiator hose on drivers side right?

yes for the driver side and that is the side facing you when the t-stat is installed in the crossover .http://i68.photobucket.com/albums/i29/tigman_photos/diesel/Thermostat001-1.jpg

The other thing I should've mentioned...a lot of the manufacturers will re-number a part and sell it for other applications. Not saying thats what has happened here, but they do it regularly. Expands sales on that part, makes'm more money. Its kinda the "one size fits all" mentallity and it saves them production costs. At any rate, both will work, but my personal experience has proven (to me at least), that the hi-flow is the way to go. I got pretty drastic temp fluctuation with the conventional stat.

+2, you want the weird looking one, its a higher flow and better made. Also drill a 1/16" hole in the flange, it will let air escape and help with engine life as it won't have the sudden hot/cold surge. That hole will make filling easy. I do it on all vehicles and some factory stats are finally coming with them but they use a jiggle pin. On reverse flow cooling systems, that hole is needed or it take s hours to bleed them out, :(

Hi you make me dig a little bit for that one but here it is
AC Delco Thermostat 131-103
IIRC the hummer use the same but twin thermostat
Ed

Hi Jodean , after a trip at my dealer the Delco #130131-103 is for hummer and the GM# 14077122(190deg) or GM#12559336 (195deg)the exact one you got .
http://i68.photobucket.com/albums/i29/tigman_photos/Silverado/IMG_1265.jpg

and for the one in my pic the GM# 12559338 ( Delco #130131-91) it is call dual spring loaded because he have 2 spring :rolleyes:

i hope i get all the detail for cross reference numer .

turbovanman
Also drill a 1/16" hole in the flange, it will let air escape and help with engine life as it won't have the sudden hot/cold surge.sorry turboman but i dont agree with your statement for 3 reasons

-the flow fluctuation is cause because you have too muche air in the radiator that cause the coolant temperature to drop drasticly when it enter the engine .

-the diesel engine need all the heat it can in winter to heat the cab so even a small bypass is heat you loose . Remember my WVO system pull all the excessive heat from my rad in winter the t-stat does not open at 60 on highway, yes i have a temp sensor for thatwhen i test my system:cool:

and
-the air come out when the engine run and the t-stat open .

the factory that have a hole in it or a wiggling pin build them for gasser engine , i newer see a gm diesel t-stat with a factory hole in it , , , , , yet

tigman, thanks for looking into that.....but i cant understand your post.

Do you mean the one i have is mislabeled and is really a GM#12559336 ?

turbovanman
sorry turboman but i dont agree with your statement for 3 reasons

-the flow fluctuation is cause because you have too muche air in the radiator that cause the coolant temperature to drop drasticly when it enter the engine .

-the diesel engine need all the heat it can in winter to heat the cab so even a small bypass is heat you loose . Remember my WVO system pull all the excessive heat from my rad in winter the t-stat does not open at 60 on highway, yes i have a temp sensor for thatwhen i test my system:cool:

and
-the air come out when the engine run and the t-stat open .

the factory that have a hole in it or a wiggling pin build them for gasser engine , i newer see a gm diesel t-stat with a factory hole in it , , , , , yet

Just because the factory didn't put it in, doesn't mean it doesn't work.

Weird, I have that mod and I have all the heat I need in the winter, guess my van is special, ;)

The temp flucuation 9 times out of 10 is due to a poor thermostat design, cheap unit that can't keep up or can't flow enough.

Yes, running the engine will purge air, eventually but sometimes this will cause the thermostat not to open and blow head gaskets. I can't count the number of times I've seen that. :(

Originally Posted by Jodean http://www.dieselplace.com/forum/images/buttons/viewpost.gif (http://www.dieselplace.com/forum/showthread.php?p=2982271#post2982271)
thermostat given to me the first time

ACD # 132-55
GM # 14077122
yes the master cross reference number
#6620-01-146-8006 = #14077122 = #ACD = #132-55 = #4F801-003 the first one

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82-86 C35/C3500 Pickup* (http://www.partsquick.com/ProductModelApps.asp?i=304431&d=&m=75&y=1982&z=1986&n=453&s=) 83-93 G25/G2500 Van Rally* (http://www.partsquick.com/ProductModelApps.asp?i=304431&d=&m=75&y=1983&z=1993&n=766&s=461) 83-93 G25/G2500 Van Vandura* (http://www.partsquick.com/ProductModelApps.asp?i=304431&d=&m=75&y=1983&z=1993&n=766&s=675) 83-93 G35/G3500 Van* (http://www.partsquick.com/ProductModelApps.asp?i=304431&d=&m=75&y=1983&z=1993&n=770&s=) 83-93 G35/G3500 Van Rally* (http://www.partsquick.com/ProductModelApps.asp?i=304431&d=&m=75&y=1983&z=1993&n=770&s=461) 83-93 G35/G3500 Van Vandura* (http://www.partsquick.com/ProductModelApps.asp?i=304431&d=&m=75&y=1983&z=1993&n=770&s=675) 90-90 Jimmy* (http://www.partsquick.com/ProductModelApps.asp?i=304431&d=&m=75&y=1990&z=1990&n=876&s=)1. (C) V8 6.2L Diesel FI2. (J) V8 6.2L Diesel FI
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82-86 K25/K2500 Suburban* (http://www.partsquick.com/ProductModelApps.asp?i=304431&d=&m=75&y=1982&z=1986&n=887&s=) 82-86 K35/K3500 Pickup* (http://www.partsquick.com/ProductModelApps.asp?i=304431&d=&m=75&y=1982&z=1986&n=891&s=) 82-89 P25/P2500 Van* (http://www.partsquick.com/ProductModelApps.asp?i=304431&d=&m=75&y=1982&z=1989&n=1065&s=) 82-93 P35/P3500 Van* (http://www.partsquick.com/ProductModelApps.asp?i=304431&d=&m=75&y=1982&z=1993&n=1069&s=) 87-87 R1500 Pickup* (http://www.partsquick.com/ProductModelApps.asp?i=304431&d=&m=75&y=1987&z=1987&n=1131&s=) 87-91 R1500 Suburban* (http://www.partsquick.com/ProductModelApps.asp?i=304431&d=&m=75&y=1987&z=1991&n=1132&s=) 88-89 R2500 Pickup* (http://www.partsquick.com/ProductModelApps.asp?i=304431&d=&m=75&y=1988&z=1989&n=1138&s=) 87-87 R2500 Pickup* (http://www.partsquick.com/ProductModelApps.asp?i=304431&d=&m=75&y=1987&z=1987&n=1138&s=)1. (C) V8 6.2L Diesel FI2. (J) V8 6.2L Diesel FI
87-91 R2500 Suburban* (http://www.partsquick.com/ProductModelApps.asp?i=304431&d=&m=75&y=1987&z=1991&n=1139&s=) 87-91 R3500 Pickup* (http://www.partsquick.com/ProductModelApps.asp?i=304431&d=&m=75&y=1987&z=1991&n=1141&s=) 87-87 V1500 Pickup* (http://www.partsquick.com/ProductModelApps.asp?i=304431&d=&m=75&y=1987&z=1987&n=1426&s=) 87-91 V1500 Suburban* (http://www.partsquick.com/ProductModelApps.asp?i=304431&d=&m=75&y=1987&z=1991&n=1427&s=) 87-87 V2500 Pickup* (http://www.partsquick.com/ProductModelApps.asp?i=304431&d=&m=75&y=1987&z=1987&n=1430&s=)1. (C) V8 6.2L Diesel FI2. (J) V8 6.2L Diesel FI
87-91 V2500 Suburban* (http://www.partsquick.com/ProductModelApps.asp?i=304431&d=&m=75&y=1987&z=1991&n=1431&s=) 87-91 V3500 Pickup* (http://www.partsquick.com/ProductModelApps.asp?i=304431&d=&m=75&y=1987&z=1991&n=1434&s=)

now for the cross reference number

Master Cross Reference Data (MCRD) - shows alternate part numbers for a national stock number show
# 6685014376799 is #12554977 and #12559336 and #131-103 those 3 number are the exact same part for a 6.5 turbo including hummer high-flow twin thermostat . the one in my picture .

i hope i'm more clear with the cross reference number for the same part .:o:

so yes the first time was the 6.2 model and my pic is the 6.5 high folw .and i will keep those number in my computer for next year.

Ed

so am i reading that correclty that the # you were trying to give me is 301-103

instead you gave me 131-103, and is the wrong one then??

Hi sorry for the mistake but it was late and now i can't do the correction :o:

131-103 it is .

# 6685014376799 is #12554977 and #12559336 and #131-103 those 3 number are the exact same part for a 6.5 turbo including hummer high-flow twin thermostat . the one in my picture

Ed

ps :where can i edit my previous post now :confused:

doh......here i thought i knew what was going on.....

Jodean, you know i cut the tip off my little finger , the doctor put the bones/crush mussle/skin back togetter ,stitch everithing together and i use painkiller lately :o:

I'm lucky i will keep my finger but cant work for few months.

Ed

too bad i cant correct my post for the future reference

Check your local auto parts for a tstat listed for an early model 6.9 Ford diesel. I've heard they will work. Hearsay but worth a look. Anybody else heard this?

didn't get one yet but i replace my dodge and have a deep look at it .

Dodge Cummins from 89 to 2002

http://i68.photobucket.com/albums/i29/tigman_photos/Silverado/IMG_1345.jpg

and it fit perfectely in place. the flow rate are the same so i will try it in my engine

Ed