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A CAT DIESEL!? Caterpillar 3126 7.2L Turbo Diesel Engine
A CAT DIESEL!? Caterpillar 3126 7.2L Turbo Diesel Engine Teardown! Part 1: Lets Take The Top Off!
#CAT #DIESEL #Caterpillar #7.2L #Turbo #Diesel #Engine
“I Do Cars”
Is this the first teardown you’ve seen on this channel? There are nearly 120 more I’ve filmed over the last two years. You can find them here:
Over the last week, I’ve talked about this week’s teardown being out of the box….
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Do you mind if I do a reacts video to your 3126 videos? I know a little bit about these engines.
PENETRATOR
dt466e are heavier but better engine,at least sleeves can be replace
Welcome to the world of heavy diesel engines
Wish GM, Ford and Chrysler could take some classes from CAT on how to make a camshaft that doesn't disintegrate in 100k miles!!
ERIC, I feel soooo bad for your screwdrivers !
That’s what she said
933rd! HELLO! Roger in Pierre South Dakota
can someone explain why these have a 2 piece valve cover?? thats driving me crazy it makes no sense
The nut looked like the one that goes on the heating grid solenoid since it mounts above the intake hole.
I always get a kick outta how big and beefy everything is in a Cat engine… Those pushrods are serious… Thanks for sharing… Keep up your awesomeness…
Drove one of these for years in a Freightliner FL60 box truck. Thing was gutless! It was like a chainsaw in the regard that you were either idling or wide open, no in-between.
That thing had 400k on it and never quit going. It hauled anything and didn't care how far.
I love a 3126, we run these in our underground loaders. Different variant, we run a different head with mechanical injectors and pump. Reliable, easy to tune, can do a near full engine rebuild without taking the engine out.
I was a Cat technician for 43 years and i can tell you this engine is a very good medium range engine. Looks like the main problem with this engine was compression entering into the fuel system at #4 injector caused by an injector not torqued properly. A simple and inexpensive repair relative to engine replacement.
You might be able save the block by honing some of those cylinders with a real, PROPER cylinder hone. They are far superior to those dingle berry things you use. Throw them in the trash! A real hone has stones that can cut, or polish better than you seem to be aware. Good luck.
I'm doing an inframe on a Cummins 8.3 6CTA. Not sure why I'm watching you teardown a CAT 3136, but I'm loving it. Surprisingly, or not, I'm learning a lot about diesel engines by watching videos of medium duty engine repairs/teardowns, regards the make of the engine.
For those exhaust bolts holes down tabs, I use a pair of 12" Knipex to pretty them up. Goes a lot faster than using a hammer and screwdriver.
Injectors can be tough to get out without an injector puller. I used my Knipex again, freeze off, and a ton of force with my indexing pretty bar and Knipex. I trashed mine, but was planning on replacing anyway as they were the wrong ones.
I used my giant breaker bar on the head bolts as well. They are usually over 100lbs of torque plus 90⁰. I don't know about CAT, but on Cummins heads, you have to remove them in a specific order as well to keep from warping the head. My head is well over 400lbs. Used a cherry picker to pull it out. Takes 4 guys to load it up into the back of a minivan.
My son had one of these in his shop that was 'bad'. Found out a previous mechanic left a rag in it and tried to get it to run.
Purple O rings were OK melted one was ordinary black, does not look good, the fuel could finish up in the oil. Not good
Soray it down with brake clean brass wire wheel it with an angle grinder.
Don't pull the heads on those by hand, use a winch A frame, engine hoist, or in your case, a forkift. Zip those headbolts out with 3/4 drive, high air pressure!!
Pull exhaust with turbo, bench remove turbo.
Valve train looks real good…might get a great sellable head off it. Big money…
The cylinders full of oil came from the HEUI system draining into the cylinders when you pulled the injectors. Some of it was oil, and some of it was diesel fuel, as those injectors have a rail of each.
The valve math was similar to blue collars talking abt their time cards
The nut was on top of the intake….. you can see it in the video. Once you removed the intake manifold it fell in.👍👍
i have seen this before when somebody substitutes Buna o-rings for FKM/Viton orings. Buna can't handle the heat and dies eventually.
I love the 3126! It never failed me in Iraq
Early versions of the Stryker utilized Caterpillar’s turbocharged 7.2-liter inline 6-cylinder 3126 diesel engine. More recent iterations use Caterpillar’s C7 motor, which shares the 3126’s 7.2-liter displacement.
Cat is top quality.
Remember these a designed to be HD, unlike a Mazda!! LOL
On most HD stuff a good 3/4" ratchet is a welcome sight over your breaker!
Smaller Lady Slipper would be a good investment from Snap On!
If a good Cat mechanic put it together, all the bolts will be tight! Taught to be using a torque quench a bunch.
Those exhaust "connectors" are called Locks, Cat use to use alot of them.
I use to use Diesel Fuel on Broadway to rebuild mine, great people, maybe just the module on it with weird number
Now my speed, done lots of Cat, Detroit, Mack, Cummins , Case and some John Deere. Great start!
Eric, how about that RX-7 in the background?
I would like to have a core
get a 3ft 1in pipe and slide it over your breaker wrench handle, easier to break loose stubborn bolts with minimal effort
would you sell the turbo
Hahahha ya im gonna just use my fork lift casually hahahha
Thanks bruv fareal man you saved me aloy of time
The 2 SS Trucks, plus this Green one, plus that Kitty Cat's Turbo. Manual Tire Tread Depth Adjustment Tool that uses Octane to convert Rubber to a Smokey Aphrodisiac?
magnificent engine🙏
I'd love to have this engine in my 4WD.
The mysterious nut was sitting om the flange as you were taking it apart. Fell in when you popped it off…
Caterpillar corporation. It’s probably saying oh no.
That’s what he said. Comment?
Dude you're going to need a cherry picker or some sort of hoist to get parts off of it. This thing is heavy. Like It can crush you if you're not careful with some of the parts. Not the engine, the parts of the engine.
TIL: Cat has the same problem of dropping nuts from the grid heater into the intake that the Cummins 6.7 does…
You can see the stud where it came from in the video on the left side of the screen