4.3l V6 Swap Out

[16Pilot]

I just bought a 1990 Stratos with a 4.3l v6 that has a hole in the block (Guy did not winterize). Inboards are kinda new to me and we are about to take this out of the boat today. Any help with where to start would be appreciated. What would be the easiest way to get it out since the average hoist will not lift that far. And besides the block,gaskets,rings what else should I replace ? Thanks guys

 

[achris]

Re: 4.3l V6 Swap Out

1) You need to remove the sterndrive leg. Put in forward gear, remove trim ram aft mounts (the ones farthest from the transom), remove six nuts (5/8" socket) holding leg to bell housing and pull. Watch out, the legs are quite heavy. <br />2) Disconnect : battery leads from starter motor (turn off batteries first!), fuel line, throttle cable and shift cable, electrical harness connector, two wires running to trim position sensor.<br />3) Loosen hose clamps from around the rubber exhaust tubes (both sides).<br />4) Remove two bolts at the back of the engine on the flywheel housing (3/4" socket) that hold the engine onto the inner transom plate. Remove two nuts (big!) that hold the engine to the mounts (mounts are screwed to the floor of the boat, usually)<br />5) Lift............

 

[doman]

Re: 4.3l V6 Swap Out

why would you remove sterndrive? just curious i have never done it and didnt know you had to drop the outdrive before pulling the engine out..deos it apply to 140 merc as well?

 

[16Pilot]

Re: 4.3l V6 Swap Out

I actually got it out w/o removing the stern drive by putting the trim up the whole way. I also converted a auto block to marine block. Only differance is the fuel pump, I had to go to a electric from the standard push rod. Any suggestions there? Is changing the impeelor in the outdrive tough ?

 

[Bondo]

Re: 4.3l V6 Swap Out

I actually got it out w/o removing the stern drive

It's Still Got to come Off.........<br />You'll need to ReAlign the engine....... <br />

Is changing the impeelor in the outdrive tough ?

Nope.......<br />Get a Manual...... It's Pretty Easy.......

 

[Trent]

Re: 4.3l V6 Swap Out

There are other differences. You did put a marine cam in it? Marine waterpump, brass freeze plugs. Im guessing you used your old carb, cause they are different also. Stainless steel head gasket.

 

[16Pilot]

Re: 4.3l V6 Swap Out

Why is the cam different ?

 

[16Pilot]

Re: 4.3l V6 Swap Out

and no I do not think the head gaskets were stainless steel.

 

[16Pilot]

Re: 4.3l V6 Swap Out

Bondo, When you say realign the engine, what exactly do you mean because I thought you just had to line it up on the spline.

 

[16Pilot]

Re: 4.3l V6 Swap Out

as you can tell I have no freakin no clue

 

[Bondo]

Re: 4.3l V6 Swap Out

as you can tell I have no freakin no clue

Go to the Top Center of This Page,<br />And Click on Search........<br />The Answers to All of your Questions are There.........

 

[achris]

Re: 4.3l V6 Swap Out

"Why is the cam different?"<br /><br />Because the torque curve on a car engine can be setup to give lots of torque from a higher rev range. The marine engine has to be "pulling" from quite lower or you'll have performance issues.<br /><br />Taking the engine out without removing the leg risks damage to the engine coupler, gimbal bearing, unijoints and tempers. It only takes 7 minutes to get a leg off so why leave it there....<br /><br />Chris.......

 

[16Pilot]

Re: 4.3l V6 Swap Out

Thanks Chris........let me tell you what happened here, I did a complete engine swap and put the engine back in only to find out I screwed up because I did not put new crank bearings in. (Ring bearings are new) The engine would not turn. it tries but I did not lube the crank or rods with grease. Is my issue ? I was extremely carefull putting the motor back in w/o removing the outdrive. After I take it out this time I will remove the outdrive. I am buying a new marine engine over the winter so I want to run the cam out of the truck motor till then. As long as I dont run it hard do you think I will be straight? What I would really like to do is talk to someone over the phone but I dont want inconvienance anyone. I am really new at this and we just a little one which has takin all of our money. I am stuck between a rock and a hard place, any help would be greatly appreciated. Thanks to all of you for your help. I have very little money and I am trying to this cheap. I put all new gaskets(including stainless steel head gaskets).<br /> Thanks guys, Chris

 

[achris]

Re: 4.3l V6 Swap Out

If the engine is not in correct alignment with the drive unit you run a very real risk of damage to the coupler (on the back of the engine) and the input shaft to the drive unit, regardless of the engine speed. Both of which are quite expensive to replace and require the removal of the engine. <br /><br />Cheapest, easiest thing... Take it to a shop and get them to check the alignment. Then you'll have piece of mind.<br /><br />Chris.............

 

[16Pilot]

Re: 4.3l V6 Swap Out

as far as my engine being tough as nails to turn, do you think maybe it is my crank bearings ? or that I did not lube everything as I reinstalled ? Thanks Chris, Chris

 

[achris]

Re: 4.3l V6 Swap Out

Chris,<br /><br />Take the leg off and see if it'll turn. If the alignment is a long way out it could make the engine hard to turn. Also an engine with new rings and/or bearings can be tight. Did it turn ok before it went back in?<br /><br />Chris.........

 

[16Pilot]

Re: 4.3l V6 Swap Out

i tried to turn it before i put it back in and i couldnt get it to turn, i thought maybe it was because everything was tight but the starter would not turn it either, would not greasing the crank and the rod bearings or the pistons cause this ? (I did use Oil on the rod bearing but upon reading my Haynes after the fact it said not to do that, oops) Thanks in advance for all the help !<br />Chris

 

[achris]

Re: 4.3l V6 Swap Out

Chris,<br /><br />I have always used oil on assembling an engine. What does the Haynes manual say to use?<br /><br />Were you able to turn the motor at all? Could you have installed one/some bearing caps backwards or out of sequence? <br /><br />I have done a no-no on one engine that wouldn't turn with the starter, but I was able to turn it manually (with a lot of grunting!). I connected 2 batteries in series and hit the starter with 24 volts. It worked well and after a few minutes of running (on 12 volts to the coil) the engine was ok to start on 12 volts.<br /><br />I AM NOT RECOMMENDING THIS STRATEGY. I am just pointing out that I have done it.<br /><br />Chris..........

 

[16Pilot]

Re: 4.3l V6 Swap Out

I tried the 24 volt deal just now and still got nothing. I think maybe I should go to the crank bearings and get new ones and lube them this time. Whats your opinion ?

 

[16Pilot]

Re: 4.3l V6 Swap Out

it moves mayce a 1/4 inch or so when I try to crank it