Mercruiser 330 (454 Chevy) Water Intrusion

take [Music] what's up guys fsc speed shop this right here behind me as we saw in the last video was my 1989 sea ray 268 sundancer if you're watching on this channel you know i didn't just buy it and then put it right to use you know with a boat that is currently named some assembly required it just doesn't need anything else to be said there's work that needs to be done now understand i bought this boat knowing it had problems and that's what we do we try to buy things cheap fix them up a little bit use them and then go ahead and play with them this is a long-term investment for me and my family we're gonna go ahead and get that fixed up the last video we showed you what it was and what's in it and so forth now in this video we're going to start the repair process of it now this is the last year of the 89 268 sundancer the following year 1990 the boats look completely different to me they have more of that melted more formed look without the traditional straight lines of this boat here not saying there's anything wrong with those boats i just prefer the older traditional looking boats this boat has the eight foot six wide beam it is the max width that i could tow it for cross-country use so i could take it to florida take it to the jersey shore heck even maybe make it to the west coast that's why we have three quarter ton trucks on the channel that's why my son has that big dodge ram with the v10 i also have a one ton chevy 3500 crew cab that will also come onto this channel eventually in time i just have to clear out other projects with that this project right here really isn't much of a project but it has a cracked exhaust manifold it overheats at an idle if you know anything about mercruiser engines basically they're inboard outboards the engine side stern drives on the outside inside is basically a car engine modified for marine applications no a car engine and a marine engine are not the same even though this is a 454 it is not exactly the same as what's in your 454 in your chevy truck or your big block chevelle the internals are for the most part very much the same you have different pistons you have a different rpm range basically meaning your cam is wildly different think about it you're not going to put your car in gear and drive and keep it at 3 500 rpm for a few hours engines internally are built differently the blocks they are identical with that they overheat why well cars have air that goes through the radiator and blows past your exhaust system not in a boat the exhaust system has to be water cooled as well and when they crack that causes water intrusion problems when you have water intrusion problems if you leave it that way long enough your engine block will look like it's full of mayonnaise that's what we have we're gonna go ahead and start that job we are going to go ahead and solve this boat's problems with that let's get jump on board and get started man open the engine cover show you what we got right there is your 454. now what he talked about was something leaking right around here when i had it running i didn't see any of that what i did see was this right here just staring right in the face this crack right here and all the water staining now for the guys that don't do boats that are new to the channel or if you watch the channel for a while these manifolds are water cooled so they put water in and surrounds the actual exhaust gas port that comes out but if this were to crack on the inside it'll spill the water into the engine and into the cylinders another thing we could do is we could pull the plug see what comes out of them water wise and see uh check the compression on them see if we have any valve train problems the same is on a starboard side here right side see a little bit of water staining coming down off that riser but i don't see any cracking or any obvious issues doesn't mean that there isn't it just means that i don't see it we'll pull a dipstick out here as you see right there that's the level where it starts to get oil and water mix that yucky crap so i'll show you this right here where my thumb is is where it level is wipe it off right there is the fill line back it up so that's how much overfill the engine is that's got to be all the way up against the intake manifold so the first thing we got to do is get that gunk out of there we'll set this aside i just sent matt over to the store and he bought me a nice little suction tool check this out i sent matt over to northern tool to buy this here what this does is obviously you can't get underneath the oil pan or pull the drain plug and obviously you're not supposed to just drain it into builds right out the ground although i could probably rig up a funnel and a hose that's not a good idea so what they do is they put these dipstick tubes down low into the oil pan and you suck the oil out that way now what i remember on my dad's omc 130 was we put the hose directly on the oil dipstick tube but there's a check valve here so you have to send this tube down you know water just pop right out there kind of to the bottom raise up a little bit what you do is you attach this hose to here close this valve and for large engines you have to give this pump 50 pumps that puts vacuum in the tank the vacuum is what will pull the oil out of the [Music] engine so in a strange turn of events what i did is that mighty vac wasn't pulling any oil out of it it was like thick sludge wasn't working i was thinking about draining the oil i looked through the scuttle plug i saw the drain plug but i saw a hose coming off the front of the oil pan a thick one like what in the world is that so i crawled inside sure enough it's got an oil cooler obviously i got it running now i was trying to thin out the oil to suck it out the oil cooler is leaking that oil cooler is direct injecting that water right into the oil pan now that exhaust manifold is cracked and the leak is minimal with that being said the oil cooler leak that's big getting fired matt [Music] we opted to take the drain plug out and let it drip down the bilge we'll put a drain plug um it's too small for me so we'll let matt do it don't turn it the wrong way remember which way to turn it which one is this your side your side what 9 16 really that's all yeah it's going to be opposite of tightening so it's going to be put it to your side turn it this way this way okay cannot afford you description this way turn it to me see i'm doing it okay can you sounds dumb oh i could do it what i'm going to eat i need you to go get tape or something i need to tape this around my arm so i can have this because i need to pull on it but i can't you want a longer a sock and a breaker bar maybe no i need this but i need this taped on my arm so it doesn't slide so we got the drain plug out just dumping it right into the bilge and that's what's coming out the brown you see is only from the oil that already was in the pan but that white creamy crap is what coming out of that engine now the basic plan is to send matthew to go get a tube so we can bypass the water line going through the cooler we're going to run it on the muffs with the power steering disconnected and without a oil cooler we'll just take that line it goes through the oil cooler hook it right to the housing on the side of the block and we'll idle it in here with fresh oil the oil cooler itself came out in two pieces as you can see the oil dripping out of it the other parts right here it also does the power steering pump or power steering fluid i should say oh no did i blend it no it's garbage anyway all right these two pieces go together and it goes together like this and that's what froze right there if any of those little tubes cracked that'll put oil that'll put water right into the oil all right what's up guys it's the next day we're gonna go ahead and make the attempt now to start figuring out how to pressure test this engine block carl up in there it's like a week since i made the last video maybe a little bit longer i had to take the semi out on the road i already opened up the boat as you can see just through the cover over the front already opened up the engine cover kind of funny working at a angle now the basic idea is pull the batteries i did run it with the fresh oil but she still overheated so what we're gonna do pull the batteries i'm gonna start yanking these exhaust manifolds off as well like i said then i'm gonna figure out how to block off the plumbing and pressure test i'll tell you guys what i've worked on some difficult vehicles before this takes the cake because like you gotta dive in the whole engine is under the floor i'm sitting on the floor so yeah it's not the easiest thing in the world i'm gonna do my best to film for you i don't know how much of this you're actually gonna get now these are these giant ass water cooled exhaust manifolds this right here is just a relocated oil filter because you're never going to get down there simple so the exhaust comes up through here on the inside there's a water cooled jacket surrounding it which froze and cracked your riser and this is where the water and exhaust meet right in this boot yeah it's cooled off enough so rubber can handle your exhaust and goes down and out your stern drive and prop so that's basically how it works my idea is simple i got to take this exhaust manifold off and a lot of stuff is bolted to it so let's just go ahead and get started on bolting unscrewing and taking all the stuff off this elbow is garbage anyway i think maybe i have to take the elbow and the tube together because the tube overlaps part of the elbow so i'll give her a couple whacks break it loose and we'll take it all out as one unit i suppose [Music] all right it's loose from the manifold now ready matt ready they hand you the elbow and the tubes that apparently is the answer what how i took it off what is that little flap thing in the exhaust what that is is when you put the boat in the water water tries to rush up or backwards so it'll hit the big side and close a flap at once that way it closes the valve it's a flow valve basically if the exhaust and water goes this way it'll stay open if it tries to backflow like if you're putting it in on the boat ramp it won't backflow up and fill your exhaust now this is where your exhaust would come out and here is your water inlets that's how it cools your mana that's how cools your manifolds is just a thin gasket this will all be replaced with the new kit see the corrosion right here zoom in see this corrosion this is the stuff that causes flow problems and the stuff that creates overheating problems now granted you got the holes for the gasket so i'm not sure how much damage any that would have done but there is a actual gasket material there too i suppose like i said it's one of the hardest engines i've ever worked on imagine there's some water there imagine if this was a twin v6 268 i don't know how you work on that i think everything you do is an engine out because i don't think you can get to anything well still good amount of water in the manifold they said i imagine here now would be full of water [Music] i think he's heavy [Music] [Music] now my baby wants to hold me

Channel: FSC Trucking

Views: 51,699

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Id: SATpRD1ffHc

Length: 17min 31sec (1051 seconds)

Published: Thu Aug 13 2020