Again overheating PROBLEMS

[dieseldazzle]

A flex fan will move more air than a stock one.
Not sure if i picked up this tip here or from For c Bodies. Under your thermostat in the cast water pump housing is a 1/2" hole. I drilled and tapped mine and installed an oil passage plug (Allen head pipe plug from a big block)with a 1/8" hole drilled in it. Seemed to help a lot.

Never heard of this do you have a link

 

[troublemaker]

Thank you "moes" I'm going to take that advice and cut my shroud back. I'll look for a flex fan as well. Kind of wanted to keep the stock 8 blade on though. I like the idea on the heater hose valve, plan on doing that to.
Thanks guys, more than enough valuable info to get me to a cooler 440. Appreciate it

 

[themechanic]

22" radiator with a bored out 440 is your main problem.

 

[Hemi 354]

Try a larger (26") radiator and a 160 degree thermostat.

 

[troublemaker]

I had a 26" inch one in, problem was worse. I had 2" on either side with no air going through. I was just picking up xtra coolant storage with a radiator that didn't fit.

 

[troublemaker]

I was talking with Herbie about it at Herbs parts, thought the best way to go was aluminum 22" like the cutout, shroud, better pump, better stat. 383 car with a 440 that's the real problem. Not enough air flow at idle.

 

[troublemaker]

I'll do some tweaking thanks for your help guys

 

[727]

Dieseldazzle,
I'm looking for the link and having a time finding it. I've done it to 2 of my big block cars and it made difference on both. I think i used a 3/8" pipe tap and an oil passage plug. You can drill the center of oil plug with a 1/8" drill bit. This just limits how much water gets recirculated in the pump.

 

[coloradodave]

That temperature after that much idling is not a problem. All new engines run hotter due to initial friction and mating of parts. Watch the temperature come down some once the engine is broken in. BTW, running lean may hurt you in a smog test, as well as retarded timing (factory settings don't often work anymore with today's fuel). I would advance the timing a couple of degrees at a time until it cranks slow when hot or/and pings under acceleration, then retard it to the last setting. I use a 22" aluminum radiator with a double row of 1" tubes, a 17" flex fan sitting 1/2 way into the shroud and 1" from the core, a 180* thermostat and live where the summer temperature often tops 100*. No problem and it gets driven a lot...

 

[troublemaker]

Thank you for that coloradodave,hats exactly what I plan on doing. Did u use flexalite spacers or Mopar?

 

[Dennis H]

Sorry Dave, had to get this in. 180 Superstat by Stant, 26" Ma Mopar Copper radiator, shroud, green coolant, factory thermal fan. My recipe. Runs under 170 most times as confirmed by laser temp gun. Plugs are NGK XR5's. I too would not be concerned with 205 tops extended idling. Surprised no one mentioned the dome light by now.

 

[62 Dart Convertible]

I too would not be concerned with 205 tops extended idling. Surprised no one mentioned the dome light by now.

Checking air pressure in the tires may be just as useful as some of the suggestions I read in here.

Could somebody please explain how a hotter spark plug can make an engine run hotter?!

 

[themechanic]

I had a 26" inch one in, problem was worse. I had 2" on either side with no air going through. I was just picking up xtra coolant storage with a radiator that didn't fit.

You have to change the radiator support, not just the radiator.

You could go the expensive route and run that stuff Jay Leno uses in most his cars. No water system.

 

[mopar 3 B]

Checking air pressure in the tires may be just as useful as some of the suggestions I read in here.

Could somebody please explain how a hotter spark plug can make an engine run hotter?!

Lookup something called fuel flash. Different heat ranges afect burn rates. The change in the burn rate changes combustion temps or something like that.

 

[62 Dart Convertible]

Lookup something called fuel flash. Different heat ranges afect burn rates. The change in the burn rate changes combustion temps or something like that.

Fuel flash? You mean fuel flashpoint? Can you provide a link?

A cooler plug will not make your engine run cooler unless you were running a plug that is too hot and causing pre-ignition.

 

[coloradodave]

Thank you for that coloradodave,hats exactly what I plan on doing. Did u use flexalite spacers or Mopar?

Flex-o-lite from Summit.

 

[440fish]

Get rid of those under driven pulleys. They have no place or benefit on your build and are spinning your water pump slower than it should.

 

[not so famous bob]

Checking air pressure in the tires may be just as useful as some of the suggestions I read in here.

Could somebody please explain how a hotter spark plug can make an engine run hotter?!

hotter plugs don`t carry off combustion heat as fast as colder plugs . read up !

 

[HEMI-ITIS]

I went with a 6 cylinder wp pully,it is a smaller diameter causing the WP to flow faster.I changes because the wp pully was hitting the ATI superdamper and lower temps came on thier own.I have no room for a fan on the front of the rad and have 2 pushers.My heap runs at 180* with a 160 stat.

 

[62 Dart Convertible]

hotter plugs don`t carry off combustion heat as fast as colder plugs . read up !

Well that is why the plug is hotter, but how/why would it make an engine develop more heat? Provide a link.