Thread: 318 running hot

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.60 over is alot and will run hot.
I would be running the water restrictors instead of a thermistat they will get it to run cool.
The thinner those cylinder walls are the hotter it's gonna run.
Watch the advance to because that won't help the situation.
Kurt

Please explain what a water restrictor is?

Both the 318 and latter the 360 in my Willys Wagon with Dodge truck sized Rads would not stay cool with and electric fan, I tried 14,16,18" puller fans , 16 Pull with the 14 push in front ----was worse I finally put a belt driven 18" truck SS flex and built a tight shroud and have not had a problem since.

The Crown Vic fan has one of the highest CFM's out there.They are kind of annoying because the amount of air being moved is very noisy

A water restrictor looks like a flat metal washer with differant size holes in the center of them.
After your car warms up it will run at the same temp all the time.
I used the middle size hole washer in mine and my car ran right at 160 all the time.
I found the big hole washer just flowed to fast and didn't slow the flow enough to cool
the water in the Radiator. Differant motors flow differant amounts of water so one of the other's
may work better for your car. The thing I like is it does not let your car build up heat before trying
to open like a stat does before cooling it back down. It's the same temp all the time so if it goes above
the set temp you know right away that something is wrong. Unlike a stat were if something goes wrong
the stat's already up to 200 then something goes wrong before you know it your up to 250 and just burn't
your bearings up. Of course I was in Vegas were the weather was allways above 100 degree's out!!!
Hope this helps!!!
Kurt

I'm thinking old school. Flex fan and shroud. I like the idea of the flow restrictor.

It's back in the shop. They're going to flush it and check for cavitation. I'm looking into getting a mechanical fan, shroud, flow restrictor set, and an oil cooler with fan. I have a plan to mount the oil cooler so its waste heat will be directed away from the radiator.

I know I`ve had gotten more bad t-stats in the last ten years than I`ve ever had before, he should have a 180 and check for opening in a pot with a cooking thermometer, think I would start there first, plus a shroud.

My son`s `68 dart 360 bored 60 over, 9.5 to 1, with stock rad, 180 t-stat shroud and stock fixed 6-blade fan runs at 180 even in 105 ambient temps.

Originally Posted by 406Rich

I know I`ve had gotten more bad t-stats in the last ten years than I`ve ever had before, he should have a 180 and check for opening in a pot with a cooking thermometer, think I would start there first, plus a shroud.

My son`s `68 dart 360 bored 60 over, 9.5 to 1, with stock rad, 180 t-stat shroud and stock fixed 6-blade fan runs at 180 even in 105 ambient temps.

Rich-I'm with you.Don't think the 060 over would have much to do with it.Shroud is one of the big keys.

Ok, It's back in the shop. They found the intake gaskets failed. They say the ones the used were wrong type for aluminum heads and intake. I told them to do leak down tests on the cylinders to make sure the head gaskets are good.

I'll keep ya posted

Cool, back on to recovery

Not always good news, but good to know it aint bad damage

Cylinder pressures showed ok, so head gaskets should be ok. The say they can't get a good seal on the t stat housing. Maybe the intake trouble was causing the overheating.

I'll keep ya posted

Both of the things you mentioned could cause over heating.
If the stat ain't sealed good it won't hold pressure and won't cool right.
And if they used the wrong head gasget and the water passages were blocked it sure won't cool right either.
I don't know how hot you got it, but I would be worried about bearing getting scored or the block or heads
even getting worped. I would be more then upset if a shop built me a motor and did that.
Kurt

I think the restrictor is ok if the air temp. is always the same or its in a race car.....Nascar uses tape to control the air thru the radiator. Street car use the thermostat to control the water flow. I have a thermostat with 4 bypass holes and it won't come up to temp below 50 degrees. Restrictor plates would have to be change according to air temp.