ok guys last resort, if this dont fix it its going away for a while

[MICHIGANV8S10]

ok, im at my end with this truck, so far ive put a NEW 4.3 rad in it, flex fan, electric fan, water pump, burped it like 5 times, new t stat again water wetter, water, rad fluid and more, and nothing seems to cool this piece of shit, my thoughts are it needs a bigger radiator, but im not gonna spend the money without some research.

so for now im taking the front runners and slicks off and putn rollers on it and push it into the back yard and let it sink in the yard. if anybody has any thoughts or info ill gladly take it,,

i did a ton of measuring at work today, and everybody says use a vette radiator, BUT ITS SMALL THAN MY 2nd gen s10 rad, so that wont do me any good.

some say blown head gasket, but theres no smoke and it takes atleast 12 mins to get to about 215. and if i drive it it doesnt make a difference,

if u have parts and want to sell them, let me know.. thanks guys justin... off to walk to my uncles and pay my tow bill, and drink some PABST bLUE RIBBON.:2up::2up::veryangry::veryangry::veryangry: :veryangry:

[MICHIGANV8S10]

then it hits 230 and pisses eveywhere..

[bigfoot385]

What kind of fan and shroud ?

[96407s10]

What belt set up do you have. I have had a few customers that had a serpentine pump on a v belt set up and vice versa. serpentine is a counter clockwise rotatation, v belt clock wise. Just a thought.

[smsmith36]

Give more details like size of electric fan and if you have a shroud. Two things come to mind that could be the problem. Wrong rotation water pump or electric fan turning wrong direction. Since you have a flex and electric fan I assume the electric is in front pushing. Make sure it's not wired to be pulling. What temp thermostat are you using? There's a small possibility even a new thermostat could be bad.

[jameskirk1]

What's your ignition timing?

[lxtasy]

A corvette radiator may not be as wide as your stocker but I believe the core is thicker though.

Curious on what electric fan you have and what its rotation is.

[MICHIGANV8S10]

just electric fan with shroud, reg style v belt pump.. blocks a 78. water pump is off a 78, heads 87 montecarlo, 305.. but i think travis n i got it figured out, i need more fan,

[lxtasy]

what size electric fan? Cfm of fan? Or what vehicle did it come off of.

and you are certain it is going in the right direction?

[Diabolical]

I'm telling ya.. I went through this..
I had to use "water wetter" and get all the air out of my block..
Please show me a pic of the way your radiator top hose sits in relation to your water neck on the intake manifold.

I bet you have air trapped in the system..
If your radiator hose is lower than the intake inlet.. Its hard to get the water to circulate..

Mike

[a_penquin]

Hal, if its still the fan I think it is, its a fan from a newer ford F250. He has the second half to mine. Dont know the CFM but mine is like a jet spooling.

[lxtasy]

if there was 2 fans stock one would be high speed and the other low speed typically.

[01XtremeLT1]

Im going with air trapped in the system. the 4.3 radiator should be fine/ also check fan installation on whether its a pusher or a puller/ if the flex fan is still installed there should not be an issue with over heating unless as Mike say's there is air trapped in the system.

[MICHIGANV8S10]

ok mike, ill try to get a pic, i dont own a camera, so ill try my pos cell phone.. the fan was supposed to be off a f250 but i highly doubt it, cuz it doesnt do jack squat aand im 1 million percent that the pump is correct because i just solved that issue, i had the pump for my new style crate motor on it, and it ws wrong, so i bought a CORRECT year pump for this motor
..not sure on the cfm, BUT IT DOESNT DO MUCH

[jameskirk1]

305 cid and a 4.3L radiator worked great for me for years.

I'll ask again, what is your ignition timing??? If you have a slow ignition timing it's gonna run alot hotter and make a marginal system give up the ghost - been there and done that.

[mytmouz]

ok mike, ill try to get a pic, i dont own a camera, so ill try my pos cell phone.. the fan was supposed to be off a f250 but i highly doubt it, cuz it doesnt do jack squat aand im 1 million percent that the pump is correct because i just solved that issue, i had the pump for my new style crate motor on it, and it ws wrong, so i bought a CORRECT year pump for this motor
..not sure on the cfm, BUT IT DOESNT DO MUCH

What type accessory drive do you have? Is it a single serpentine belt?

[bigfoot385]

Part of it may be the flex fan. I would get a solid blade fan like the old days before the clutch fan and shim it up close to the radiator with a good shroud.

[sbctols1]

I am running the 4.3 radiator on a 550hp 6.0 liter. It cools great. The secret is to use the late '90's dodge intrepid/chrysler concorde electric fan. The reason is because it fits the "foot print" of the 4.3 radiator PERFECTLY! It covers %100 of the cooling area. Im telling you man this is where its at.

[MICHIGANV8S10]

can u send me a pic of the setup u have? i cant remember the timing at the moment, hell i only put 3 degreess in it when i built it

[Tweeder]

I'm going to guess i have a 4.3 rad in my truck, but who knows considering it was originally a 4 cyl 5 speed.

Anyways, the rad dosent cool for shit with twin electric fans on it. Throw the rad away and get something better (or sell it) makes no sense why you would put a new 4.3 radiator on a v8 lol Summit has radiators for like 150$

[MICHIGANV8S10]

because if you actually do your home work, you will see that the radiator works fine for my horsepower range. its a 350 9.5-1, molly rings, steel crank,498lf 238 dur @ 50, 114 center lobe 305 heads, street dominator, ported and polished heads, ported and polished intake, milled the top of the intake to flow more. and stuck a 750 holley vac sec on it. 78 block, stock rods. the motor was perfect when i got it. i didnt have to do any machine work to it, the motor had 0 miles on it. gut bought it put it in the truck drve it to a few shows, then put a bbc in it and sold the motor to me for $150. then i went through it for the hell of it.

[MICHIGANV8S10]

dont remember the timing in the distrib, but its a single serp setup, im tossing the fan thats on there and buyn this fan,, http://www.summitracing.com/parts/FLX-398/
but 1 inch or so smaller.

[a_penquin]

well if you dont want it, give it back to me.

[MICHIGANV8S10]

ya chris ill let u have it back lol. im still tryn to save the $$ for the elec fan me n travis were talkn about:laughoutloud:

[1sicks10]

i have a 2nd gen 4.3 radiator in mine and i had my brother inlaws 780 hp 14 to 1 406 in my truck and drove it all over the place and never went over 200 degrees. that was with 2 8 inch electric fans. those 4.3 radiators are serious lol

[mytmouz]

dont remember the timing in the distrib, but its a single serp setup, im tossing the fan thats on there and buyn this fan,, http://www.summitracing.com/parts/FLX-398/
but 1 inch or so smaller.

If the serpentine set up is off tbi set up the water pump is wrong. Post a pic of what you have, and we can tell you...

[MICHIGANV8S10]

all ready fixed that issue myt, its a 78 water pump, 78 block

[96407s10]

That is the whole issue if you have a serp set up you have to run a reverse water pump from a 86+ with a serpentine belt. The block has nothing to do with the water pump. on a v belt the rotation is clockwise and serp belt is counterclockwise. change the pump to a 90 silverado hd pump problem gone.
I asked this question awhile ago because that is the typical mistake people make when switching to a serp belt drive system.

[Diabolical]

Good info..

[mytmouz]

That is why I keep asking for pix, water pump depends on the accessory drives, not the motor year. I have a 1962 327 in my blazer with the serpentine set up from a 1989 firebird, including the firebird water pump, and I have minimal cooling issues, even with the ac on...

[Rickracer]

The 4.3 pump will work too Joel, or he could go this route:

I forgot to take a pic before i started pulling it apart, but there's probably one I can snag from my build thread that would work....anyway, here goes...

http://i68.photobucket.com/albums/i4/Rickracer/My%20Truck/360%20Engine%20Swap/Corvette%20Pump%20-%20Mercruiser%20Pulley/VettePump-MercruiserPulley001.jpg

When one of the fans I originally installed burned up at like 50 miles, I rigged this up till I can get my hands on an Intrepid fan setup, it's the original E-fan from the 86 Camaro of Barb's, and a quickie custom built shroud/mounting bracket. It hangs on the top of the radiator core, and a few screws on the bottom hold it in place.

http://i68.photobucket.com/albums/i4/Rickracer/My%20Truck/360%20Engine%20Swap/Corvette%20Pump%20-%20Mercruiser%20Pulley/VettePump-MercruiserPulley002.jpg

Here, you can see that a regular heater hose outlet won't work, you need a long one, like the Vette had...

http://i68.photobucket.com/albums/i4/Rickracer/My%20Truck/360%20Engine%20Swap/Corvette%20Pump%20-%20Mercruiser%20Pulley/VettePump-MercruiserPulley003.jpg

This is where I started notching the bracket for the radiator hose and heater hose outlet.

http://i68.photobucket.com/albums/i4/Rickracer/My%20Truck/360%20Engine%20Swap/Corvette%20Pump%20-%20Mercruiser%20Pulley/VettePump-MercruiserPulley004.jpg

I forgot to take a pic after notching till I already had it bolted on, and didn't want to take it back off, but I think you can see from this pic what needs to be done....

http://i68.photobucket.com/albums/i4/Rickracer/My%20Truck/360%20Engine%20Swap/Corvette%20Pump%20-%20Mercruiser%20Pulley/VettePump-MercruiserPulley005.jpg

The rest are just pics of the finished job from different angles, 8)

http://i68.photobucket.com/albums/i4/Rickracer/My%20Truck/360%20Engine%20Swap/Corvette%20Pump%20-%20Mercruiser%20Pulley/VettePump-MercruiserPulley006.jpg

http://i68.photobucket.com/albums/i4/Rickracer/My%20Truck/360%20Engine%20Swap/Corvette%20Pump%20-%20Mercruiser%20Pulley/VettePump-MercruiserPulley007.jpg

http://i68.photobucket.com/albums/i4/Rickracer/My%20Truck/360%20Engine%20Swap/Corvette%20Pump%20-%20Mercruiser%20Pulley/VettePump-MercruiserPulley008.jpg

http://i68.photobucket.com/albums/i4/Rickracer/My%20Truck/360%20Engine%20Swap/Corvette%20Pump%20-%20Mercruiser%20Pulley/VettePump-MercruiserPulley009.jpg

The Mercruiser pulley was P/N 807729T, got mine on Ebay from marinepowerservice , $41 including shipping.
I don't have the P/N on the Vette pump right handy, but I got it from Advance Auto Parts, $45, and just ordered it for a 88 Corvette, 8)
You might want to pick up (4) 5/16"x 3/4" fine thread bolts, with flat and lock washers, to hold the pulley on, they are a different size and thread than the stock 4.3 pulley bolts. I dug into my stock of stainless bolts for the pump mounting bolts, because again, the ones from the stock 4.3 pump were too long, so you might want to pick up the correct bolts when you get the pump. Also, pay attention to the hose size on the Vette pump, it's a smaller inlet than the long pump, might need a different hose, I scared one up a piece of one that fit here at the shop. Any questions, let me know, 8)

[Diabolical]

Nice post Rick.

[MICHIGANV8S10]

ok this is pissin me off. all i did was take the v belts off, changed the pulleys to serp pulleys and put a short ser belt on to run the alt, water and balancer... y does it matter what it runs?

[Rickracer]

With the serpentine belt setup, the water pump runs backwards, so you need a reverse rotation pump. That DEFINITELY explains why you're having so much of a problem, :cool4:
The simplest solution is to just replace the pump with a 4.3 pump.

[mytmouz]

The serpentine set up you have, does it have a spring loaded belt tensioner on it, or do you just tighten the alt. or something to keep the belt tight, since you don't have any pics...

[MICHIGANV8S10]

its just using the alt to keep it tight, and i had a reverse pump on it and it was worse, its not a serp system, once again, it just has a serp water pump pulley balancer and alt, its in the same setup the v belt was, i just changed the 3 pulleys, thats it. I cant post pictures because i dont have a camera. and that cant be the issue, because it worked just fine on the last motor, im going bigger fans.

[jameskirk1]

So you are using a multi-ribbed belt in place of a v-belt...not a "true" serpentine belt setup.

[MICHIGANV8S10]

yes james, thank you. thats what ive ben trying to tell everybody, maybe i wasnt clear enough..

so lets get it straight, my pump is correct, im 100 percent
timing is correct, 100 percent.
my electric fan, is getting replaced TOMORROW, with 2 10inch 2500 cfm fANS with shrouds!! from a friend for $80.


then i have to fix the oil leak from the front main..sam thing just started outa no where..

[mytmouz]

Nah, you were not clear, lol... I was asking for pics or the idler to be used so I could better help. If all else fails try another gauge. I had a new in box that read forty degrees high when it came up to temp,
a stewart warner at that...

[Diabolical]

Something like this will help a lot, especially if your Rad is sitting too low.

http://www.s10racer.com/board/picture.php?albumid=498&pictureid=6274

[MICHIGANV8S10]

ok guys, thank you for all your help. i wish i owned a camera, it would have solved the issue of pictures a long time ago. im gonna try new gauges when i get enough $$$ saved up. til then im gonna have to let her sit, im going to pull the slicks off it and stick junkers on it. then probly stick it in storagem im out of room in the garage. lol


my list of parts comin soon!!! new 2500cfm fans, and a new water neck like mike showed me.


and maybe a CAMERA!!

[MICHIGANV8S10]

well im still having issues with the truck. hoping to get a water neck soon. then try to retune it, becuase its a turd right now. and not sure why.:2up:

[xten]

Did you check timing? As JamesKirk said, When I run below 34° total it overheats bad on the street and won't get out of it's own way.

[MICHIGANV8S10]

im gonna check it later. it just over heated on me. its 39 degrees here in michigan, it over heated from idol, for 15 mins. flipped the fans on, and still didnt help. im getn ready to scrap this thing.

[JPM]

I have a bit of experience with small block Fords and I know its possible to install the head gaskets on the wrong side and cause an overheating problem that cannot be solved. I don't know or even care who built your motor but I was wondering if you knew if it was possible on a SBC. It sounds like it starts to warm up and then cannot get water out of the heads fast enough. Can you see water moving through the radiator core when it starts to warm up? Just throwing some stuff out there.

[ffemt6488]

what is that pump for ? the one u have on there is it one for the 78 block ?