Case 504BDTI Head Gasket Replacement

[Music] hey hello today i'm going to show you how to replace the head gaskets in this case 504 bdti engine in a payloader that we call wall-e here's a look at the old head gaskets if you didn't check out my check out my teardown video you can go ahead and check that out but yeah this engine was pushing coolant out of the overflow on the radiator and so it looks here like this gasket has failed and there's compression leaking into the cooling system i like to clean up the head surf or the block surface with this plastic buffing wheel that way it doesn't take any material off it just cleans it up here i'm scraping some carbon out of the tops of the cylinder liners the liners look really good on this engine so that's nice here i'm just using a vacuum sucker to suck the oil out of the holes where the head bolts go and then i take a blow gun and blow inside the holes just to make sure there's no oil in there that way it can't do any damage when i put the bolts in so these are the heads that came off of this engine but they had some small cracks in between the valves and so i sent them away and got them re-manufactured they have new valves and everything is is machined and they're as good as new so i'm not an expert on this but i had a great manual to use and so you can see a page there i used these homemade studs and screwed them into the block just to keep the head straight as i set it onto the gasket that way just keeps everything lined up and you don't end up sliding the head around when you set it down with that slot cut in the top you can use a screwdriver to put them in really nice and take them out now before i took these heads off i marked them with a punch um that way i knew which head came from which position i just like to put them back in the place that they came from then i went ahead and uh oiled the bolts and just screwed them all in finger tight you don't want to torque the heads at this point you just want to just put all the bolts in and put them finger tight there they all are sitting pretty on top of the block what you want to do at this point is put the intake and water manifold and the exhaust manifold too if you like onto both sides and what that's going to do is it's going to keep the heads all lined up nice and straight if you would torque the heads first and then torque these manifolds on then you could have some uh twisting of the manifold and that kind of thing so so you want to make sure to do it in the right order these injector lines have a little rubber gasket in the end and these ones were very brittle and hard so i decided to change those while i was doing this job the injectors tested bad on this engine even though it was was running really good so i got three manufactured injectors as well so here i'm putting those in i like to use lots of permatex anti-seize that's like my favorite thing to use because if i ever have to take these injectors out again they're going to come out really nice because i used lots of anti-seize on them and i decided to put these the fuel lines on now just so it's easier to put the water manifold on as you can see rather than try and sneak those lines underneath that manifold afterwards i didn't put the exhaust manifold on yet because i didn't uh it was cracked and i was waiting for a piece of it so here we're torquing the heads down um one thing with these fuel lines being on top here the one bolt on each head is underneath is kind of underneath that line uh so i had to use a shallow socket with a 3 8 extension on it just to kind of sneak underneath that fuel line so here i'm backing off all the adjustment nuts on the on the rocker arms uh it would have been nice to do this actually before i took them off it's just a little easier when they're bolted down to get those loose but they work this way too yeah and before you put the push rods in you want to make sure that those holes are clean where they sit in because if anything fell in there it could mess up your valve adjustment and so yeah i just uh use the sucker and then the blow gun to just clean those and break clean as well to clean those holes out as best i could there put the studs in for the rocker arms and then bolted down the rocker arms and torque them up here's the fun part putting some fresh paint on an engine just really really makes a the job look nice so i always like to throw on some new [Music] paint [Music] all right time to set the valves so you want to turn the engine to top dead center check the first uh number one piston for valve overlap and then you can start setting there's a nice little mark on the flywheel there it says zero so that's where where your top dead center is um if your number one cylinder isn't on valve overlap then you know your your one revolution out and so you have to turn it over 180 degrees to get to your start [Music] position i'm doing the cold setting here there is a speck in the book for a hot setting it's a good idea to do that after you've run the engine to to re-torque the heads and reset the valves with the hot setting i didn't do that on this engine um it's not as crucial on an engine with uh separate heads but it it's not a bad idea to do it there's the cracked manifold so i replaced that center piece but these end pieces got some cracks in there when we took them off so i decided to try welding them i've never done this before but i think it'll work pretty good now i can put the exhaust manifold on at this point i forgot to put the heat shield in between the manifold and the fuel lines so i wouldn't put that on later but that just keeps the heat from from hitting the fuel lines directly all right now it's time to start putting on the exterior parts of the motor the fan and the air compressor this uh payloader has air brakes and it actually pressurizes up the oil tank to to push the hydraulic oil through this is the turbo oil line it works to snake it through there after you put the manifold on you can put it on before but then you'd be working around it when you're setting valves and stuff so i just did it at this point [Music] [Music] okay so so so one of the reasons for running the engine with the valve cover off is to check for oil coming out of each of the rocker just to make sure you're getting proper oil flow to all of them so i can see that here now i'm uh putting on the valve covers i got these cork gaskets which i really do not like but that's what i had so i always uh throw a bead of uh black rtv silicone on them and then i just set them down without torque without tightening them and then i let the silicone kind of set up for a while before i actually tighten them down that seems to be the best way to get these things to [Music] seal [Music] so so i hope you found this video helpful or entertaining and if you have any questions about it just leave them in the comments you

Channel: Triple B Garage

Views: 1,011

Rating: 5 out of 5

Keywords: #caseengine, #headgasket, #caseloader, #casetractor

Id: 7LfHSpSH7lY

Length: 15min 43sec (943 seconds)

Published: Wed Dec 16 2020