Adjusting Rockers 4.3

[jdtower23]

Re: Adjusting Rockers 4.3

Don,

I didn't turn it completely over....but moved it down and back to check all the cylinder walls....I used a little steel wool on them then blew it out with compressed air....and coated the cyls with synthetic oil, ran my fingers around the whole area to make sure the whole wall was covered in oil...

 

[Don S]

Re: Adjusting Rockers 4.3

The problem is, is there is something you didn't do, you don't know what it was or because you didn't know you should do it, because you didn't know anything about it to begin with which is why you didn't do it, so no way in hell will you remember what it is.

But you need to do something to see if the engine will turn, doesn't matter if you pull the starter and use a screwdriver, or get the tool. But do something......... Soon.

 

[jdtower23]

Re: Adjusting Rockers 4.3

Don,

I'm going to pull the starter tomorrow I guess....it couldn't be anything to do with my drive could it? It goes in and out of gear....verified oil pump shaft still turns....

Thanks

 

[jdtower23]

Re: Adjusting Rockers 4.3

Pulled the starter....there is no place on the flywheel I can stick a screwdriver in other than the ring gear....very little space....thought maybe the starter somehow got engaged.....

Guess I'll pull the intake manifold! Could the cam have caught a lifter wrong and be stuck? Something has to be stopping it.....no way it is rust in the pistons....before I assembled it they looked nice and shiney with the oil....I could possible have some slight rust I missed further down that I couldn't get to, but it couldn't be bad enough to lock it this hard.....

Thanks for all the help everyone...

 

[Coors]

Re: Adjusting Rockers 4.3

You stick a big screwdriver in there, and leverage the ring gear.
Turn it, the gear is harder than your screwdriver.

 

[jdtower23]

Re: Adjusting Rockers 4.3

Coors,

I think i'm just going to pull the intake....you don't think my theory about the cam/lifters holds any water? I don't want to try to force it ....

 

[Don S]

Re: Adjusting Rockers 4.3

I don't thjink your cam theory holds any water. Use the screwdriver and force it some. With only 45 ft lbs of force on the crankshaft bolt, you wouldn't have enough force break any minor rust free.
I really don't think you can put enough force on the ring gear to bend anything.
If you have all the rockers off, and the distributor out, FORCE it.

 

[FreeBeeTony]

Re: Adjusting Rockers 4.3

sure it's not the drive?

 

[jdtower23]

Re: Adjusting Rockers 4.3

Ok, i'll trust your experience.....I was having a hard time finding any place to get leverage down there.....the case around it is too thin of metal and the floor of the boat isn't the right angle.....any tricks I could use? I can't believe so little of the flywheel is exposed....

And on the drive, is there any way it could still be the drive if it goes in and out of gear? I put it in gear and propeller wouldn't rotate, took it out and spun freely.....

Thanks

 

[SuperNova]

Re: Adjusting Rockers 4.3

Yea, I know what's stopping the engine from turning. The pistons are hitting the valves..

The 4.3 is a non-interference engine. The pistons can't hit the valves unless a keeper lets go.

 

[Coors]

Re: Adjusting Rockers 4.3

Make a tool if you have to.
Get something to grab the ring gear teeth, and slowly turn it.

 

[Don S]

Re: Adjusting Rockers 4.3

The 4.3 is a non-interference engine. The pistons can't hit the valves unless a keeper lets go.

Yes they can. Adjust a valve that is already on the top of the cam lobe as if it were on the low part of the lobe and see what happens.

 

[SuperNova]

Re: Adjusting Rockers 4.3

And yes. it could absolutely be the drive. I had a couple of teeth shear off the upper gearset a couple of years ago and it locked the motor up just about solid. I could turn it a couple of degrees back and forth, but that was it. I also had just built the engine and thought it had let go, but I pulled the drive off and found out what the real problem was. And yes the drive went into and out of gear just fine and the prop turned normally in regard to being in gear or in neutral. If you want to check the upper gearset, just pull the 4 bolts out the the upper cover and you can see the gears right there and you won't lose any gear oil either. Or you can pull the whole outdrive back off and try to spin the engine. The way I did it is I pulled the cover, saw the gears broken and jammed, so I pulled the drive and cranked the engine over. I have not yet seen a cylinder jam up in such a way that the engine couldn't be turned at all.
--
Stan

 

[SuperNova]

Re: Adjusting Rockers 4.3

Yes they can. Adjust a valve that is already on the top of the cam lobe as if it were on the low part of the lobe and see what happens.

Won't matter, you'll just end up with a very loose valve adjustment--think about it.

A non-interference motor is just that, there is virtually nothing you can do to make the valve hit the piston, even intentionally.
--
Stan

 

[Coors]

Re: Adjusting Rockers 4.3

This is real redneck;
Get the tool that spins your crank with the balancer.
if not, while the balancer is off, put a rag on the crank snout, and use judicial use of a pipe wrench. If you ain't done it before-don't. There is a fine line where know you might score the crank. You have to have been there before. Experience of torques is a learned thing.

I suggest getting the crank snout turner, think Napa has them.

 

[Don S]

Re: Adjusting Rockers 4.3

Super Nova
Rather I am right or wrong, makes no difference, and I am not going to go find an engine take pictures with circles and arrows just to test your theroye theory. It doesn't matter if you can prove me wrong on this post or any of the other ones you keep trying. The question is, do you have an answer for the guys problem. If not, hush and stop being part of the problem.
Do you have a solution to his problem???????????

 

[SuperNova]

Re: Adjusting Rockers 4.3

Try re-reading my earlier post. I gave my assessment of the situation already. i'm just trying to negate the poor information or inaccurate information presented by supposedly factory trained, professional marine technicians and I am trying to do it without effecting the attitude you are so famous for. Do you think you can post without making the questioner feel like a worm? You guys have this guy doubting himself and thinking he screwed something up that he really couldn't have very easily. He seems somewhat knowledgeable and I think you are just confusing him with guesses rather than really take the time to THINK about what's happening mechanically.
And I assume this means you're not ready to admit you brain farted again are you?
--
Stan

 

[Coors]

Re: Adjusting Rockers 4.3

Gotta take up for the man
what Don mean't was take all the lash out on the lower part of lobe, then spin the high lobe up, and.......................

 

[Coors]

Re: Adjusting Rockers 4.3

But, you know? Stan is right, Don has been extra cranky the last two days, and has been up late.

 

[jdtower23]

Re: Adjusting Rockers 4.3

Tried to turn the flywheel.....wedged a baseball bat on the side of the floor and used a 3/8 8' inches long screwdriver....I got enough power on it to flex the screwdriver but no movement.....this is going forward....I haven't found a way yet to try to go backwards...