Author Topic: 440+ 6 Temperature spike when stopped...even for a short time.  (Read 2034 times)

Offline 734406pk

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Re: 440+ 6 Temperature spike when stopped...even for a short time.
« Reply #15 on: June 20, 2017 - 10:16:40 pm »
Does the thermo clutch seem to be engaging at high temp?
1973 Challenger 440 6 pack auto 3.91 rear
2012 Dodge Ram 3500 dually 6.7 Cummins Fleece EFI Live
1973 Challenger 318 2bbl auto 2.73 rear 22.5 mpg RIP
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Offline cudabob496

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72 Cuda, owned 25 years. 496, with ported Stage VI heads, .625 in solid roller, 254/258 at .050, 3500 stall, 3.91 rear. 850 Holley DP, Reverse manual valve body.
Up to 4000 RPM, Warp Speed, Up to 5000, Rediculous Speed, Up to 6000 RPM, Ludicrous Speed!

1999 Trans Am, LS1, heads, cam, headers, stall, etc! Love to surprise the rice rockets with this one. They seem so confident, then it's "what the heck just happened?"

Offline cudabob496

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Re: 440+ 6 Temperature spike when stopped...even for a short time.
« Reply #17 on: June 20, 2017 - 10:19:00 pm »
if around 200 degrees, that's fine.
also, I use this, two bottles.

https://www.summitracing.com/parts/rpo-01600


get better cooling if use 80% water, 20% antifreeze.  The purple ice has corrosion inhibitors.
Also should put a zinc in your water pump housing.
72 Cuda, owned 25 years. 496, with ported Stage VI heads, .625 in solid roller, 254/258 at .050, 3500 stall, 3.91 rear. 850 Holley DP, Reverse manual valve body.
Up to 4000 RPM, Warp Speed, Up to 5000, Rediculous Speed, Up to 6000 RPM, Ludicrous Speed!

1999 Trans Am, LS1, heads, cam, headers, stall, etc! Love to surprise the rice rockets with this one. They seem so confident, then it's "what the heck just happened?"


Offline Travis Blake

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Re: 440+ 6 Temperature spike when stopped...even for a short time.
« Reply #18 on: June 20, 2017 - 10:42:45 pm »
if around 200 degrees, that's fine.
also, I use this, two bottles.

https://www.summitracing.com/parts/rpo-01600


get better cooling if use 80% water, 20% antifreeze.  The purple ice has corrosion inhibitors.
Also should put a zinc in your water pump housing.

I've heard that from a lot of people about the 200 mark. I'd be fine if it would stop there. but it has no trouble going to 215+, at which point it stalls as soon as I pull it into gear, reverse or first. I'm assuming it's vapor locking at that point. My first step is to try to richen it up a bit. I just need to find a photo of where that screw is.
1974 Dodge Challenger  - 440 Six Pack
2015 Jeep Wrangler Unlimited - Willy's Edition

Offline cudabob496

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Re: 440+ 6 Temperature spike when stopped...even for a short time.
« Reply #19 on: June 20, 2017 - 11:13:05 pm »
this may be a no brainer. If idle is low, then water pump is moving too slowly.
Also, is it a quality water pump. Also, at low idle, fan moves slowly. So up the idle
some and see what happens. I have my car idling at 1400. I slip it into neutral
at stop lights. Also, bottom rad hose is to be bigger than upper hose.
« Last Edit: June 20, 2017 - 11:15:04 pm by cudabob496 »
72 Cuda, owned 25 years. 496, with ported Stage VI heads, .625 in solid roller, 254/258 at .050, 3500 stall, 3.91 rear. 850 Holley DP, Reverse manual valve body.
Up to 4000 RPM, Warp Speed, Up to 5000, Rediculous Speed, Up to 6000 RPM, Ludicrous Speed!

1999 Trans Am, LS1, heads, cam, headers, stall, etc! Love to surprise the rice rockets with this one. They seem so confident, then it's "what the heck just happened?"

Offline jhaag

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Re: 440+ 6 Temperature spike when stopped...even for a short time.
« Reply #20 on: June 20, 2017 - 11:17:20 pm »
Quote
OK good to know. I just looked and I don't see anything in the baseplate....is it the screw below the 3 in the picture attached by chance? If not, any chance you can add a photo, or point me to one online?

Yes that is the idle mixture screw. You must have aftermarket carbs. More than likely will not fix your heating issue anyway. If I understand you correctly the radiator temp is 140 and stays there, but the car still heats up? If that is the case you are not moving enough water through the engine. Either wrong pulleys, restriction of some kind, or possibly too much clearance between the water pump and housing.  :2cents:
love 70 Challengers

Offline Travis Blake

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Re: 440+ 6 Temperature spike when stopped...even for a short time.
« Reply #21 on: June 20, 2017 - 11:24:12 pm »
Yes that is the idle mixture screw. You must have aftermarket carbs. More than likely will not fix your heating issue anyway. If I understand you correctly the radiator temp is 140 and stays there, but the car still heats up? If that is the case you are not moving enough water through the engine. Either wrong pulleys, restriction of some kind, or possibly too much clearance between the water pump and housing.  :2cents:


Roger that. Yep, they're aftermarket carbs. I'm just going for lowest hanging fruit first just to see. Yes, that is correct. the radiator stays at 140, but the block is heating up. I'm inclined to agree with you about not moving water, I'm just confused about what is causing it. This is the pulley I've got: http://store.440source.com/Water-Pump-Pulley-Non-A_C-New-Reproduction/productinfo/132-1002/

Should I look for a different one? here are a couple pics of the pulley:

« Last Edit: June 20, 2017 - 11:47:48 pm by Travis Blake »
1974 Dodge Challenger  - 440 Six Pack
2015 Jeep Wrangler Unlimited - Willy's Edition

Offline cudabob496

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Re: 440+ 6 Temperature spike when stopped...even for a short time.
« Reply #22 on: June 21, 2017 - 12:18:26 am »
I think water pump impellers can be installed backward?
Or at least I think I read that once?
« Last Edit: June 21, 2017 - 12:20:48 am by cudabob496 »
72 Cuda, owned 25 years. 496, with ported Stage VI heads, .625 in solid roller, 254/258 at .050, 3500 stall, 3.91 rear. 850 Holley DP, Reverse manual valve body.
Up to 4000 RPM, Warp Speed, Up to 5000, Rediculous Speed, Up to 6000 RPM, Ludicrous Speed!

1999 Trans Am, LS1, heads, cam, headers, stall, etc! Love to surprise the rice rockets with this one. They seem so confident, then it's "what the heck just happened?"

Offline cudabob496

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  • Posts: 6746
72 Cuda, owned 25 years. 496, with ported Stage VI heads, .625 in solid roller, 254/258 at .050, 3500 stall, 3.91 rear. 850 Holley DP, Reverse manual valve body.
Up to 4000 RPM, Warp Speed, Up to 5000, Rediculous Speed, Up to 6000 RPM, Ludicrous Speed!

1999 Trans Am, LS1, heads, cam, headers, stall, etc! Love to surprise the rice rockets with this one. They seem so confident, then it's "what the heck just happened?"

Offline tman

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Re: 440+ 6 Temperature spike when stopped...even for a short time.
« Reply #24 on: June 21, 2017 - 02:04:42 am »
Air bubble in system or Tstat is not opening.  I know you said its new, but...........

Offline onebadfish

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Re: 440+ 6 Temperature spike when stopped...even for a short time.
« Reply #25 on: June 21, 2017 - 02:25:15 am »
Sounds to me like a water circulation problem at idle.

Offline 73440

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Re: 440+ 6 Temperature spike when stopped...even for a short time.
« Reply #26 on: June 21, 2017 - 05:39:20 am »
Check thermostat install direction and test thermostat as mentioned for proper temp opening.
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Offline Travis Blake

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Re: 440+ 6 Temperature spike when stopped...even for a short time.
« Reply #27 on: June 21, 2017 - 06:03:01 am »
Check thermostat install direction and test thermostat as mentioned for proper temp opening.

Yep, stat is installed and working correctly. Its done this with 3 separate stats.

Could the water pump housing have anything to do with this?? It's a cast iron housing, not original to the motor.  I think I got this on EBay. But it is in fact a Chrysler BB. housing.
« Last Edit: June 21, 2017 - 06:04:41 am by Travis Blake »
1974 Dodge Challenger  - 440 Six Pack
2015 Jeep Wrangler Unlimited - Willy's Edition

Offline Travis Blake

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Re: 440+ 6 Temperature spike when stopped...even for a short time.
« Reply #28 on: June 21, 2017 - 08:04:26 am »
Air bubble in system or Tstat is not opening.  I know you said its new, but...........

It's not the stat, I can say with certainty. I've installed three different one ranging from 160 to 180 to 195 just to make sure. If it is in fact an air bubble  is there a way to purge that?
1974 Dodge Challenger  - 440 Six Pack
2015 Jeep Wrangler Unlimited - Willy's Edition

Offline Travis Blake

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Re: 440+ 6 Temperature spike when stopped...even for a short time.
« Reply #29 on: June 21, 2017 - 08:42:34 am »
One other thing I just noticed this morning is that the top hose is "pliable" when squeezed when the engine is hot. In the past, when you squeeze it, it felt pressurized, which I was always under the impression is correct. Could the pliability be a sign of air in the system?   If so, how do I purge it?
« Last Edit: June 21, 2017 - 08:45:01 am by Travis Blake »
1974 Dodge Challenger  - 440 Six Pack
2015 Jeep Wrangler Unlimited - Willy's Edition