"Its Running HOT Loaded " 😬Is the ENGINE TOO SMALL? - OLD Style Hauler BUILD - COE Ramp Truck EP-31

On this Episode of Make It Kustom, we troubleshoot the heating issues with a load and a heavy deck.
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[@murdoc6501]

The positive attitudes are infectious! As you said, "That's car building!" The truck is epic! The build has been epic! Go Japhands and Halfass, keep moving forward!

[@codysmithmotorsports736]

I've done a lot of cooling mods. The air wants to go everywhere except through the radiator (because its a restriction). With how far back you rad is I would recommend a fully ducted inlet...or as much as you can anyway that either stays on the chassis or flips with the cab. You could try a big air dam under the radiator to catch air under the truck and push it up in front of the radiator. System wise a swirl pot/expansion tank is good to have. Higher pressure cap will increase efficiency of the system too. Once the air gets through the radiator it needs somewhere to go too. Maybe louver the front section of the deck plate

[@dirtydave4351]

Any air that comes through the grille needs to go through the radiator. Like through an airtight duct, no other way out. Been there, fought it long and hard.

[@phatbastard2026]

@@dirtydave4351 actually there is DippY Dave Put the damn radiator behind the GRILL not ROCKET SCIENCE internet Warrior! Ass Clowns always have an OPPINION

[@OWFab]

The greatest problem I see is the Cab will change how the air flows back there. Think of sitting in the back of a ute (pick-up), at different speeds, the spot where the air blows around changes. One minute the wind is blow dirt in your face, then no wind, the blows the other way. Isolate the radiator from all that with a big shroud, and the air will always follow the Fan's direction. Does that make any sense?

[@garrykellogg3215]

"Air-Flow Issues" require Air-Control. Like a box from the grille to the radiator, or one with a scoop low to the ground (Cooler Air) so the air coming into the radiator is guided. 41:48 I SEE THE PROBLEM WITH YOUR COOLING! Put a gap between the Transmission cooler (or relocate it) and the Radiator. The heat of the Transmission cooler is only adding to the heat of the engine's radiator. Compiling your heating issues. That 30% of area that should be getting air, is only getting heat. You need to relocate that radiator cooler into the cool air intake and watch the magic.

[@Jim-he4km]

The triangular hole in the A- arm looks a LOT like a NACA duct that could be sucking air under/ off the rad. Plug that, I think that may help???

[@briankinnear7461]

Great video. Always little things to modify or add to a build like this. Look forward to the next one even though I know what happens from Brent's video. But interested to see what your take/view looks like. Be safe and stay well.

[@joecioe8566]

Off to a bumpy start. Good luck hope all is good for the long haul.

[@freeidaho-videos]

You are sooooooo right. You have to expect things will not go perfectly. How you respond is the key. The situation gets worse if one has a bad attitude, and gets better with a good attitude. You clearly have a great attitude! Safe Trip!

[@_bigpokie_]

Keep doing what your doing and throw a few of these in the mix now and again. It’s good to see the builds and why someone built it their way.

[@minnesotatomcat]

If you’re coming through Minnesota stop in! I make custom duct work for a living, we can whip up a custom air ducting system to force air through the radiator!

[@mustache49]

locate someone in your area that builds round-d-round cars ( dirt or asphalt car), and you can get ideas for fresh air ducting to a radiator. great videos.

[@Goldstandardmachine138]

Ive built customs and classic restorations for 15 years, and 20 years in the automotive repair industries. Has anyone suggested ignition timing? It'll run hot if its not where it needs to be. I saw you had someone with hptuners playing with the trans shift points in a previous episode. Just my $0.02

[@stich1960]

This is why my last build got hot on its maiden voyage I messed up ignition

[@wayneberryman1000]

Exactly

[@truckladders4104]

Great video, your honest about the challenges I have a few suggestions The high engine temps ! Make a list of every possible concern so you don’t miss any Some suggestions I would look at 1 lbs engines are the latest design and hence made to run at higher temps 220 operating is unusual. Oe solution was 17lb rad caps you gain 3 degrees over boiling (54*) I would feel comfortable at the but the OE design goes there. You need to follow your coolant flow and make sure you cap

[@cyrilcordelier8418]

Have a great road trip to Manitoba, you and Brent rock!

[@lesgaal4017]

Mate there is alot of reasons but check for radiator hoses sucking in , they usually have a spring inside them to stop that. The cab over design is like a box pushing air away from itself being lower to the ground makes it worse for airports travel through the grill opening.

[@marca5883]

Such a shame the truck didn't make the road trip💚🇬🇧🌱 totally feel for you guys, great content all the same👌

[@dillonweigel3101]

In my experience a thermostat that’s too cold will cause a vehicle to heat up while driving but cool down when idling. At cruising RPM the coolant doesn’t stay long enough in the radiator to actually cool, and the thermostat opening at too cold of a temp will make the coolant constantly circulate. With a hotter thermostat, it will take longer to open up, allowing the coolant to stay in the rad longer. The fact that it cools down when idle tells me it’s not entirely a matter of airflow

[@tetedur377]

The quick way to convert to F from C is to double C and add 32. So 20C*2= 40C + 32 = 72F. There's an actual formula that involves fractions, and while I can do fractions, I can't do them in my head. But, it's similar to my shorthand method, though more accurate. For us, the shorthand is close enough. It got up to 90F where I'm at, so 90F-32=58. 58/2=29C. Note that the answer is actually 32.22C, but, like I said, close enough for government work and the girls I go with.

[@malcolmyoung7866]

Watched Brent's road trip episode last night.what a great journey and wild places to visit...Two great fabricators and wild truck/car builds what is not to like..?

[@bobbofly]

"Stabbity-BOO." Thinkin' I maybe gots muhself a new catchphrase. 😂😂😂😂😂😂 On a different note, perhaps you could fab up some sort of cab-through ducting, paired up with a road draft setup to direct spent airflow? Dunno how tight for space the cab presently is but it wouldn't require too much... 💡

[@lawrenceessard4086]

Missing your videos ,healthy is the most important thing USA loves you😊😊😊😊😊

[@kirkoglesby6175]

Here's my 2 cents on the cooling. Rubber guides to feed the fresh air all the way back to the rad. Instead of the air hitting the rad and going around. You want to give it only one path to feed in. Dual fan setup. The air coming past the the rad should have plenty of room for escape. Not really seeing exit being a problem so much as getting air to it.

[@brucecard5213]

Fan blowing wrong way pushing air out forward Seen it many times

[@kirkoglesby6175]

@brucecard5213 I'd like to give Karl and Brent more credit than that. have been watching both a long time. I mea, when I set up an electric fan, I use a piece of paper to ensure air direction.

[@brucecard5213]

@@kirkoglesby6175 easy thing to overlook in a thrash trying to meet a deadline ive learned better to mention what could be a prob stays cool stopped heats up when moving is a symptom of fan running backwards looks like he's got a big enough rad in it

[@kirkoglesby6175]

@brucecard5213 Yeah, nothing like missing something in the rush. I've been there.

[@OWFab]

​@brucecard5213 maybe not the fan... but the vacuum created by that cab will cause the air to change direction in the "swirl" fighting the fan and thus no air flow at mid range speed. Stopped at traffic and the fan works... at high speed the wind blows past it and the fan can direct the air through the radiator. Extend the bed over the radiator, shroud it from the "vortex" zone of the cab.... or completely relocate the cooling system.😢

[@adamkelly6264]

I know you'll have a long list of stuff to get on with, but I think those side boxes are gunna get a lot of water in them when it rains. They need an internal lip and a seal, if you want that plywood to last more than a couple of weeks.

[@davehala3781]

Did you use a low cost bargain rad? They have smaller diameter tubes. If you use a rad with larger diameter tubes it will cool better. For example, compare a Griffin rad to one of the low cost rads. I realize a Griffin isn't always in the budget, but may be able to find some large rads like the Griffin's out there in the middle price range and that will most likely solve your problem.

[@richardsiemienczuk9001]

From what I could tell Karl is using an old school all metal copper/brass radiator. I agree with going with a Griffin rad or similar. What is key is all aluminum which is more efficient in cooling than a similar size copper/brass. What is also key as you mentioned is larger diameter tubes. It is more efficient to go with a large diameter tubing in a two row core rather than three or four row tube cores. The three or four rows are just smaller diameter tubes and restrict the flow. I chased down an issue with replacing an oem aluminum/plastic rad in a XJ Cherokee when the plastic tank cracked. I decided to go with an all metal copper/brass rad and right away the engine ran hot which it never did before. I tried everything as Karl is doing with ducts, remove any obstruction if front of the rad, hd clutch fan, high flow thermostat and housing, lower rad hose with internal spring, nothing was making a difference until I replaced the all metal copper/brass with an all aluminum two row core rad. Without changing anything else the all aluminum rad ran cooler than the oem setup. With the oem 195 degree thermostat it runs all day between 190 and 200 no matter the outside temp. Changing to high power fans may help some but without increasing the heat transfer efficiency of the core tubes the copper/brass core tubes can only cool so much. Anyone building an LS motor in just about any vehicle is using an all aluminum rad.

[@zachclothier330]

Not to sure on an LS but you can have cavitation in the cooling system. Setting still the pump runs slower. Driving it spins so fast that it can’t flow smoothly causing cavitation. If you change the water pump cut every other fin off the pump. Or look for an anti cavitation pump. This will slow the flow down allowing the coolant to circulate better Best of luck

[@glassblastcollision]

My brother had a 1964 Ford and he put a resivior tank which held more coolant and it ran much cooler.

[@mrgreezy1]

You could also canvas all the cab corners with louvers. 😊

[@brianjones6500]

Nothing worse than the pressure of making last checks before final assembly. At least this truck doesn't have wings and a pilot to worry about. Lol damn those floating calipers on the passenger side. I like this truck but I think the diamond plating is a bit to shiny.

[@bkgaragerestorations]

If you cut out some holes in the shroud and put rear opening flaps over them it will work way better. The flaps will shut at low speed and when stopped in traffic so the fan pulls maximum air through the rad. At highway speed they will open up to let the air through. I had the same issue with electric fans and a tight shroud. It ran ice cold at slow speed and too warm on the highway.

[@PAUL-1961.]

I think the rad needs to be right up at the grill for max air flow

[@minnesotatomcat]

Get a fan and a bunch of buddies with bongs to stand in front and blow rips through the grill to do some proper wind tunnel testing and see how the air is flowing 👍🤣

[@Blondihacks]

Goddam that thing is wicked. Hope to get to see it in person someday. Gotta swing out your way. Bravo. No notes. Amazing work, gents. You’ll get the kinks worked out, Karl! It’s gonna be awesome

[@nicholasjulianriley]

Cool seeing you commenting here - I've been following your lead from Apple II to hobby machining to Brent and Karl's shenanigans. No idea if a collab could be a thing? :-)

[@MakeItKustom]

Thanks! Quinn! We will catch up for a beer the next time I roll Thru!

[@alleyoop1234]

For everyone that has never been to BC, I will add some perspective to what kind of hills we have here. Just east of me is the Kootenay Pass, which is over 5700ft at the summit road level, with 12KM(7 Miles) of 8% grade on the west side of the hill !

[@tetedur377]

That's pretty steep alright.

[@neilf.7222]

David Frieburger would approve 😂 #flipflops #roadkillgarage

[@Willbme4EVA]

Totally enjoying this series, I would think about mounting the AC condenser, and or Oil Cooler Horizontally under the Cabin with those uber electric fans. Just an Idea to help you out with the heat.

[@wallemahatma]

32:37 that‘s the kind of friend you need: when the sh*t hits the fan for three days in a row and he will come home a day later than planned, still he has a joke on his lips to cheer you up. pure gold.

[@georgesimeone6292]

Whatever happened to the Lincoln zeypher project?

[@glennbevan8743]

You’re looking at where the air goes in are you also looking at where the air can go out?

[@francisrampen9099]

I'd check the rad hose on the suction side if you haven't already- I bought a couple of Renault Lecars for virtually nothing because they had an overheating problem that the dealership couldn't figure out. They replaced water pumps, fans,rads, thermostats but didn't bother with the lower rad hose. The hose would collapse when you Revd the engine. A spring in the hose solved the problem and they were dead reliable thereafter. Love this project.

[@tetedur377]

Found that out the hard way. Customer brings in a LeCar for a no-start. It came in on a hook, BTW. After many trials and tribulations, including a defective starter and a slow boat to and from France, I finally fixed it. For anyone who has never worked on one of those things, to take the starter off involves removing the exhaust manifold, the driver's side motor mount, and I can't remember what all. It was back in the '80s, after all. I had to do it twice, and I never ever put another starter on a vehicle without bench-testing it first. Go to start it up, everything checks out, except there's no coolant in the thing. Add coolant and water, engine starts pissing it out like a cow peeing on a flat rock. I can't remember what was actually wrong with the little beast, but although it ran well, the repairs to the cooling system looked to be expensive, and were a direct result of the overheating problem. Water pump, expansion plugs, I don't remember. I do remember that somebody had put a spring-type lower radiator hose on it. I was surprised because I didn't think foreign cars came with those type of rad hoses. It was probably too late by that point. Anyway, the customer, being a customer, accused us of KNOWING that it was going to need further repairs, and fixing the starter anyway. The shop owner made him pay for the repair, said sorry about your luck, and the guy towed it out of there.

[@francisrampen9099]

@@tetedur377 I never had to replace a Lecar starter but in general it was a really easy car to work on - one of the few cars that Renault made that was actually really good. if you compare it to my Mercedes ML it isn't even close - you have to take most of the seats out to replace the parking brake cable!

[@kurtludwig6962]

All new builds have problems you’ve been more than patient ❤

[@garyfrost238]

4 core rad bigger the better my 2 cents

[@kevinwallis2194]

I always use a stock car solid fans on all my cars. They pull a ton of air .

[@adamfoster5334]

Fix the cooling when you 12 valve swap

[@luisagonzales1442]

Spray radiator with water if it goes down instantly, air flow problems

[@alijeanes2742]

Fan shroud, fan shroud, fan shroud !

[@BurkettTimothy]

Just curious, and please enlighten me if I am wrong, but is that master cylinder good to be tipped up on end like that? It's attached to the bottom of the cab, when you lift it up is air not able to get in the lines? Understandably it can angle to some degree, but when the cab is up it's like 80 degrees out of typical conditions.

[@chadalan2567]

Are you running an external transmission cooler aswell as running it through the radiator or just running it through the radiator for the cooling of the gearbox fluid?

[@blainekoch5018]

I’ve got a couple of ol’ truck projects and this build has definitely given some inspiration on building the beds. Thanks for the content. Keep building brother.

[@JCJohnson8]

Sweet

[@adamduchesne]

You need to build barrier between , what your hauling and the cab. Won't take much to wipe out the cab and everything in it. We already know the cab does an indo by design .so any damage to the back latch . Would be bad for the people in the cab .JS

[@tomcoryell]

Headache Rack is what we call it in the oil patch. Or maybe you already knew that…..

[@adamduchesne]

@@tomcoryell your right .I really didn't know exactly what to call it . But, I've heard that term before .

[@HeppKattProductions]

just wondering if you thought about checking the water pump. Used to have a Jeep Cherokee that had a H2O pump that squeaked like that. Never leaked, just squeaked and worked poorly. Changed it out because the noise drove me nut. After that thing ran cold even in summer.

[@nlynch55]

I was wondering what that master cylinder was made for and if it had a residual valve

[@noprojectgarage]

I'm thinking you may running a bit lean fuel wise . It's another factor when you are running hot when the motor has more load like climbing a hill.

[@tomcoryell]

Lean, or maybe too much advance.

[@joeg7755]

Hey Karl, not sure if you solved your engine noise problem yet. I posted this on Brent's page a couple days ago as I seen that video first. But here are my 2 cent comments. Are all the bolts that couple the flex plate to torque converter tight? I wonder if one of them has backed out and rubbing on the engine/transmission adaptor housing? Also, as the torque converter balloons as it warms up and while under load it could cause the coupling bolts to hit the adaptor housing if they are not correct for clearance. Just a couple of thoughts. Great build!

[@TheOriginalDaveJ]

You need to buy yourself a 3D printer so you can do your own cooling ducts etc.

[@JimmyMakingitwork]

Inside tip: Bleeding the master cylinder can also be done by capping the ports and pumping the piston until it becomes very hard or impossible to compress. At this point the air is bled. Final bleeding on the vehicle regardless of the method. I am using a Delta PAG brushless fan on my 62 C10, flows about 4000 CFM. Soft start technology. Also had them make a custom shroud. Once the bugs are sorted the Ramp truck will be sick.

[@dustinbrinker2733]

Will you let the bedside rust until it gets a look? You dig, then clear over it.

[@GregWellwood]

I have the exact same Amazon cooling fan on my turbocharged '61 Apache pickup. It's inadequate for me - fine on the highway, but overheats in traffic. I have a better one coming from Summit next week, hoping for better flow.

[@krusher74]

You cant have any water in a system before you put evans coolant in, so somehow you would have to completely dry out in in side on the whole colant system.

[@Bman2020]

The ramp truck will do what you want keep at you will find away it’s been a great build awesome to see everyone stepping up to lend a hand great watch 👍👋🇨🇦

[@stevemullen8457]

Hopefully you have seatbelts, I'd hate to see you exit through the windshield.

[@daleking8529]

Truck is awesome just a few bugs which is normal for a new build. How about moving the transmission cooler from in front of the radiator to a custom-built box with a fan of it's own?

[@danfrankhouser6579]

Possible diesel swap ahead? Pretty big truck....

[@demmarcsxr]

Hey Karl, did you miss adding your rear center width clearance lights?

[@RJ-qx6zg]

I used a set of chevy volt fans on my LS . They are brushless fans . Works great in 100 degree humid weather. Love your channel good luck

[@RonSales]

That big of framed truck hauling should have at least a 6 core rad. baffles in the front to force air into the radiator. Sounds Like the bearing in the water pump is starting to go out and it's squealing your belts.

[@MrAnotherAnkor]

При такой мощности пневмо системы есть резон использовать её также для подкачки колёс, например. Не было такого плана? Или я это упустил?

[@tipetu]

Is that brake master cylinder made to be tilted like that when the cab is lifted? It has to be 100% full or else air will enter the ports?.

[@danyf3116]

The port holes won't empty if there is no air "pushing" behind , if that makes sense. Building something right now and during the install, I inverted that master cylinder more times that I can count and it never affected the brakes.

[@terryeustice5399]

Karl I watched Brent’s video and saw the ramp truck was not able to make the trip. Sorry that happened. Getting the bugs out in that short of time was pushing you. Thank you for your video! It looks great. A Fancy build for sure. 💯👊👍💕

[@sbluke5515]

Kind of late to the conversation but a stock mechanical fan will move close to 3x-4x as much air as an electric. If you have the room.

[@stanleymartin1613]

Cool video! Squealing sound on motor sounds like water pump. Enjoyed watching ✌️ 😎

[@paulvanhouts3365]

Yeah me too, I’m not much of a mechanic but my tractor had that problem and I swapped out the bearings, all solved, but trucks and cars have more hanging off them that could do it too.

[@donames6941]

A better shroud on the rad only half of the blades should be in it me working with hvac in my pass learn that the fan blade placement in the condenser shroud well move more or less air

[@freeidaho-videos]

I'd put a bit of 1/2" plywood under the hot rod, or it will wear and scratch the deck pretty badly.

[@NZMOPAR]

That fuel filler will hold some juice

[@PAUL-1961.]

your trans cooler may be blocking a lot of air flow,maybe getting too hot

[@StreetTruckinTitan]

If havent already, electric dual fans are your friend. I didnt wait long enough and saw at the end you did get dual fans. 👍🏼

[@brianmacadam4793]

I have an old British roadster, famous for overheating. I started with improved ducting, did the electric fan, then added a second fan, then redid the ducting. The final solution included "exit" ducts improved side vents and cleaning up the floor pan. It was a pain to do but now the car is vastly more comfortable inside and doesn't even comes close to overheating.

[@chrisjohnson6554]

Karl , check out some of the drag & drive video's , they make a compleat tunnel to make sure all the air coming in the grill has to go through the rad

[@noprojectgarage]

You can check that by installing an air fuel ratio gauge

[@SinCityAnimal]

I've been wondering how all that added steel weight would affect the engine. Id say a bigger power plant would run better. Most tow trucks are big blocks or diesel

[@krusher74]

We run tiny engines compared to this in Europe in trucks and its all fine.

[@gkanderson92]

Didn't hear you say what the fans came out of?

[@coupestanger90]

I commented about the fan in your instagram post, had the same issue with a shroud i built almost the same. Added some rubber flaps that open under pressure while driving and that helped quitena bit

[@krusher74]

Ì used an exhaust doughnut on a exhaust fab 20 years ago, how has the world devolved into wasting so much time "pie cutting"

[@dennisschickling2249]

Nice Video. Hope that you had a Great Canada Day. Happy 4th of July to USA 🇺🇸. #STAYSAFE #PHILLYPHILLY 🇺🇸

[@13coyote13]

The fix is a 12 valve.

[@minnesotatomcat]

Exactly, why would you put a stupid little LS motor in a truck like that. I normally trust Karl’s judgment but that choice has bothered me from day one.

[@SkaterStimm]

I am watching to hopefully figure out what was the cause of the squeal

[@professorfalken4600]

Karl, Matt at MATTS OFF ROAD RECOVERY built a heavy off-road Wrecker for use in Utah. He used TWO Radiators in his build with a 6.0 LS.

[@OldGriz708]

Matt's off road wrecker has an 8.1 from a 2002 Suburban nit a 6.0

[@liquidhandwash]

Great to see the truck driving around in one of the most beautiful parts of the world. Also, you teased us with donuts on the ramp truck!

[@faroironandcustoms6577]

I'm sure you know by now how it worked. Those slim fans aren't great. Unfortunately, my Ranger 5.0 swap has just enough room for a slim fan, so my eyes are always on the engine temp. Years ago my auto instructor in community college had an electric fan in his Elco. He used the Elco fan shroud and a fan out of a Lincoln or something grafted to the factory shroud. Sounds like if you get the air flow right you will be ok. Loving the ramp truck. Maybe someday I can do a Ford COE or something. Looking forward to the trip!!!

[@Yaman-D-Chhaya]

Dear Carl konnichiwa 🙏🙏🙏it's been great to have watched all the build for this beauty truck bro, must say awesome work, I saw the struggle for the cooling issues, I may be totally wrong but I feel the steel bumper on the front if it has some vents, or may be you cut slots 1½inch thick, 3 or 4 of them in the front I feel it's gonna help more to ventilate the area better than removing the chrome extention to the GMC logo dear bro, hope this can solve your issue❤❤ great series of videos Carl love and warm regards from India🇮🇳🇮🇳❤️❤️👌👌

[@cwsgarage]

You should hunt down some vintage Stewart Warner "Worldwide series" gauges, they have Celsius and Fahrenheit. Truck is looking great, ya'll have killed it.

[@That70sChannel]

15:11 that shot right there looks so much like your initial vision of this truck when you were sketching it out on paper!

[@kramer26]

Hi Karl, just catching up on your videos, this is my favourite build of yours! You needed to have a cab up counter for this episode, too! Suggestions for the cooling system if you haven't tried or thought of them before... Yes, use the shroud, it will help the fan pull air through the rad, but it needs to be fully sealed on the back side. You could vee mount the rad if you have space, with a fully ducted inlet. A smaller water pump pulley might help, or an auxiliary radiator. An external engine oil cooler might also help... You could also stamp a bunch of 50s Gene Winfield style louvres in that front deck panel you removed earlier on. It would look cool and help with airflow! And those side boxes, they would be cool with an up and over door mech. It would be more trick, they will be out the way and protected when open, tucked up inside the cabinet, and not folded down right in front of the opening. Just a thought... 👍🏼 Great build, hope you get the issues sorted. Guess I'll find out in the next episodes lol 😂

[@kevins.7990]

I used to have a GMC years ago, and it had a serpentine belt that would squeak. Whenever I replaced it with a "Dayco" brand from a parts store, it would start squeaking again shortly thereafter. Eventually, I replaced it with a Goodyear/Continental brand belt, and it never squeaked again. Maybe it would fix your belt issue also by changing brands.

[@willschluneger709]

With my York 210 and a 2.5 gallon tank on my Toyota Landcruiser I can air up 4 35x12.50 from 10-40 at elevation in Colorado mountains in the same amount of time it takes my brother to do 1.5 35x12.59 tires with his Viair

[@AirfixLtd]

Forget about sleeping accommodation on your road trips, those 'under bed' cupboards would be great for moving large quantities of alcohol across borders if Prohibition ever returns???? 😎🍺🍷🍸😁

[@jazzxtreme2674]

You probably already know this... but make sure that your steam port that that crosses from one cylinder head to the other is plumbed into your radiator or upper radiator hose. Very important on an LS Engine. Great Job!

[@tylerdurden2644]

My Guess besides ducting and fan is waterflow. Maybe and electric water pump or minimum a performance one. Long pulls uphill with high density altitude like in summer require increased water flow along with radiators. Never was happy with stock GM water pumps when pulling hard.

[@randywaldrep8482]

Get with Dan D&D Speed Shop, He had an electric fan the fixed his cooling issues. He has purchased and used it on other vehicles sense then the same fan on other applications. Manual fans did work for many years just saying. Cool Build I hope the factory setup long term is a fix.

[@leonhart2452]

On your brakes. I saw the problem right from the first time you showed how the brake pedal/ MC are set up. Your brake pedal is heavy. The MC wasn't designed to hold up much weight. You need a spring on the brake pedal to hold it up so the weight doesn't push on the MC. On most cars the MC only has to swing the brake pedal. Even at that there are often return springs on the pedal.

[@PCP6996]

While I do think the engine might be a tad too small, from a thermodynamic point of view a bigger one will produce just as much heat, as long as the load stays the same. Whenever you require a certain amount of power, a ICE creates about 3x (gas) or over 2x (diesel) heat that needs to be evacuated.

[@dancarter482]

Whatever that other cooler matrix is in front of the rad' isn't helping any. If it was higher, the air could pass under it. Maybe creating a hot spot. Ducting is definitely key to good airflow as is a good escape path - the more air you can draw away behind the source of heat. the more will be dragged in the front. As others have said, a grid instead of a plate for the deck behind the cab should make a big difference. _Awesome BIG-rig!_

[@brianscott1898]

@Carl., nice work boyz., Truck looks awesome!!! For all you built and made the temp is a minor issue., hope the fans worked