Keeping coolant and transmission temps under control when towing in the summer heat

[swathdiver]

It is a sub machine gun...

I remember firing a Mac-10 in .45 ACP once, shot so fast it ejected some unfired rounds which we loaded back up and sent down range! Fun stuff. M3 Grease Guns and Thompsons are more practical and controllable.

 

[Geotrash]

I installed a gun safe in the center console of our 2012 and keep a S&W M&P 2.0 9mm in it when we take trips. 2 years ago we were driving around St. Louis pulling a trailer at 11pm on a Saturday night when all of the George Floyd riots were happening. We got routed off the highway and through neighborhoods with people shouting all around us and even a house fire. I put the gun in the cupholder with an extra clip. It all worked out fine with people mostly just waving us on. My wife is not a gun person, but she was sure glad I had ours that night. She asked to go to the range when we got home, so I taught her how to handle the gun safely.

 

[Tozan]

I remember firing a Mac-10 in .45 ACP once, shot so fast it ejected some unfired rounds which we loaded back up and sent down range! Fun stuff. M3 Grease Guns and Thompsons are more practical and controllable.

The Modified MAC's are actually winning some of the machine gun competitions. There are some cool uppers you can put on MAC's to slow the rate down, better stocks, caliber conversions 45 to 9 mm, 22LR and even 5.56 is available too. I think someone once made a .556 belt fed upper for a MAC too but, ATF was not too happy with it.

I worked for a company that sold full auto weapons / NFA toys in Fort Pierce back in the 80's when they were pretty cheap. MAC-10's sold for a few hundred bucks and a M-16 for under a grand. Today a MAC-10 will sell for $8000 to $10,000 and a M-16A-1 for around $30,000 They were a good investment...

 

[donjetman]

There are sheep, and there are sheep dogs.

 

[alpha_omega]

$10k for an A-1? Time to sell mine while the getting is good.

 

[Sparksalot]

I fabbed a restriction using the original nipple cut loose from the old tank.

 

[alpha_omega]

Nice idea!

 

[Tozan]

$10k for an A-1? Time to sell mine while the getting is good.

If you have a M-16-A1 that is on the registry for $10K I'll buy it..

 

[Sangster]

What's the purpose of the restrictor? Does it help with cooling.....or does it simply help with getting temps up to operating temp?

 

[Tozan]

What's the purpose of the restrictor? Does it help with cooling.....or does it simply help with getting temps up to operating temp?

In my experience it helps bring it up to temp faster and stops the error code form activating. When the error code is triggered the fan came on full time and ac would shutdown. I would have to go in and reset or restart the car to get things working again.

 

[Sangster]

In my experience it helps bring it up to temp faster and stops the error code form activating. When the error code is triggered the fan came on full time and ac would shutdown. I would have to go in and reset or restart the car to get things working again.

Ok, so not something I should focus on when battling high temps. I have an aftermarket 2 core aluminum radiator, but from Amazon, not the Core brand or whatever it is that doesn't come with a restrictor. I never checked mine, but it gets up to temp normally and then I am battling higher temps.

 

[Geotrash]

In my experience it helps bring it up to temp faster and stops the error code form activating. When the error code is triggered the fan came on full time and ac would shutdown. I would have to go in and reset or restart the car to get things working again.

This is 100% correct.

 

[Tozan]

Ok, so not something I should focus on when battling high temps. I have an aftermarket 2 core aluminum radiator, but from Amazon, not the Core brand or whatever it is that doesn't come with a restrictor. I never checked mine, but it gets up to temp normally and then I am battling higher temps.

Does your radiator have an oil cooler on it? in front of the radiator?

 

[Sangster]

Does your radiator have an oil cooler on it? in front of the radiator?

Yes, Trucool 40k right smack dab in front of the AC condenser. Have to move it down below next. I'm assuming you are referring to the transmission fluid cooler....

 

[Tozan]

Yes, Trucool 40k right smack dab in front of the AC condenser. Have to move it down below next. I'm assuming you are referring to the transmission fluid cooler....

That is most likely why it is running hotter. With the air having to pass through three layers it is reducing the air flow. I would either move the oil cooler to a new lower location or try to move it so there is a few inches between them allowing a little more air to move around them.

 

[insidious334]

So did anyone just try to tune the fans? Ive seen a similar write up on the truck page with the same issues with a 6.2l sierra and just using hp tuners fixed his issue. Supposedly the fans run around 70% (+/-) duty on high and will kick up to 90% just before overheating. Im having the same issue on our 11 xl 6.2 denali, trans temp stays fine until the coolant temps reach 235.

 

[Foggy]

I have looked into fan tuning w HPT.. On the trucks/suvs there is NO SPEED Override option
The fans turn OFF at about 45ish mph... really no matter what you do..
I don't have issues with it running hot until I'm pulling my large travel trailer
at about 55 mph. And that will tend to up my ECT into my "uncomfortable" zone
But at least now, I can turn on my independent trans cooler fan to help dissipate
some of that heat
I may try to send a "ticket" into HPT to see if they will add a channel to make
it possible to override the MPH / Fan Turn Off Speed with some sort of option
for ECT to override it. But I'm fairly new with the HPTuners - for now

 

[Sparksalot]

Thethirdtwin After climbing a mostly 6% grade for 16 miles. I’ve been in the same location with thecopcar after upgrading the external cooler. It topped 200.

 

[swathdiver]

I have an aftermarket 2 core aluminum radiator

GMs engineers spent a lot of time and money getting our radiators right, if they wanted a second row, they would have added it. I have read in other professional publications that our cooling systems are not like those of thirty or forty years ago when a 4 row was an upgrade to a 2 or 3 row radiator. These new systems actually degrade with additional rows and we are seeing that all aluminum radiators are not all that either.

 

[GranPrix]

GMs engineers spent a lot of time and money getting our radiators right, if they wanted a second row, they would have added it. I have read in other professional publications that our cooling systems are not like those of thirty or forty years ago when a 4 row was an upgrade to a 2 or 3 row radiator. These new systems actually degrade with additional rows and we are seeing that all aluminum radiators are not all that either.

But the fact that heat has been an issue for these trannys you don't think a cooler like a 40k which drops temps to 130ish is a benefit?