Adjusting Rockers 4.3

[MikDee]

Re: Adjusting Rockers 4.3

After rereading your posts, I see you had the engine apart, all bets are off then! You now have to determine where TDC on your crankshaft is, as your cam is set to fire cylinder #1, then make sure your distributor lines up to fire #1 at the same time (you might have to remove your distributor, and reset it to do this). A hint here, both intake, & exhaust valves, should be closed at TDC for cyl.#1.

 

[mkpj1]

Re: Adjusting Rockers 4.3

hopefully he is getting some sleep now. Lack of experience, frustration, and fatigue can cause hallucinations. Once I had the screwdriver stuck in number one as i had been determining the top of the stroke. Swore I messed something up util I noticed it.

Good luck JD. Hopefully you work it out.

Ken

 

[jdtower23]

Re: Adjusting Rockers 4.3

Thanks for all the advice guys....

I took the distributor out....still can't get the motor to move....I really don't know what to do now....I maybe have screwed up and had it at #6 TDC....

Thanks

 

[jdtower23]

Re: Adjusting Rockers 4.3

Can i try gently turning the motor with the prop?

 

[Dakota47]

Re: Adjusting Rockers 4.3

Thats not going to do anything..

 

[Dakota47]

Re: Adjusting Rockers 4.3

Your best bet right now is to tear it back down and get some help puting it back together before you ruin somthing. buy the book too.

 

[jdtower23]

Re: Adjusting Rockers 4.3

There's nothing else I can do besides tearing it down again? What could possibly be stopping the motor? Valves?

 

[jdtower23]

Re: Adjusting Rockers 4.3

Ok....if I have to tear it down again can I reuse the intake manifold gasket? I know I'd have to replace the head gasket again....but I don't need the whole kit this time since I haven't even touched the exhaust or valve cover gaskets....I can't believe I screwed up this bad

 

[Coors]

Re: Adjusting Rockers 4.3

Did you try turning it over before installing the head?

 

[Reel Poor]

Re: Adjusting Rockers 4.3

You should be turning the motor in a clockwise direction (looking at the front of the engine). With all spark plugs out, all the rockers off, every valve on each head at the same height, there is no reason the engine shouldn't turn, related to these fore mentioned parts. 40lbs of torque on the crankshaft bolt is enough to turn the engine unless something is binding it up. I agree to stop using the crank bolt to turn the engine before you do damage to the crank threads. Buy or make a tool.

A valve hitting a piston or something on a piston will not stop the engine from turning both directions, only one direction will be inhibited. Failed bearing(s), distributor, oil pump, mechanical fuel pump and/or push rod, and/or out drive are all I can think of that would stop the engine from turning either direction. If you have the accessory drive belts on, remove them, one of the accessories could have frozen up.

 

[Don S]

Re: Adjusting Rockers 4.3

Of course you need new gaskets. Gaskets are NEVER reusable.

Guess by now you see there is a lot more to being a marine mechanic than just throwing a couple of parts at something and making it work.

Did you take the rockers off of both sides?????
If not, might want to try that before you take it all apart

 

[jdtower23]

Re: Adjusting Rockers 4.3

I turned it before installing the head....i didn't move it far but moved the #1 all the way down and back....with just my hands on the crank pulley....

Outdrive propeller is not engaged if that matters....Belts are off....distributor is now out....is there any way to test the fuel pump?

And sorry, I was just asking about the intake gasket....I know normally any gasket is not reusable...just thought since it hasn't been run it may be possible....no biggie if it's not....

And I didn't take this job lightly....I've made a couple of stupid mistakes but what can you do....I think I may have marked the distributor wrong since it turns back when it pulls out, and it was actually pointing to #6....I was in a stupid rush pulling it apart since my help was only in town that evening....I should've prepared better and will from now on...

 

[FreeBeeTony]

Re: Adjusting Rockers 4.3

Is the outdrive installed?

Is it possible the outdrive is frozen?

 

[jdtower23]

Re: Adjusting Rockers 4.3

I don't see how it's possible.....outdrive worked fine last time it was out....

 

[87 bayliner]

Re: Adjusting Rockers 4.3

4.3 used hydraulic lifters correct ? if thats the case i believe you need to tighten the nut down until zero lash then about 3/4 turn more. that all. make sure each cylinder is at top dead center b 4 making adjustment. if you cranked the nut all the way down the piston WILL contact the valve and bend it.


j

 

[Coors]

Re: Adjusting Rockers 4.3

4.3 used hydraulic lifters correct ? if thats the case i believe you need to tighten the nut down until zero lash then about 3/4 turn more. that all. make sure each cylinder is at top dead center b 4 making adjustment. if you cranked the nut all the way down the piston WILL contact the valve and bend it.


j

I don't think so, turning it over by hand.
Something else is going on here.

 

[jdtower23]

Re: Adjusting Rockers 4.3

I'm starting to think that tearing it down isn't even going to help....like you said, it has to be something else....any way to test either the fuel or oil pump? Actually, couldn't be the oil pump since the distrib is out right? What about the fuel pump?

 

[Don S]

Re: Adjusting Rockers 4.3

I'm beginning to think it may be just stuck because of some rust on the rings to the cylinders. Since you didn't turn the engine over completely, it may be just rusted a little and stuck.
But, you don't want to turn it with the bolt on the crankshaft either. You could try removing the starter and using a screwdriver to turn the flywheel to see if it will start turning. You aren't going to bend anything since all the rocker arms are off, and the screwdriver will not bend a rod.

 

[jdtower23]

Re: Adjusting Rockers 4.3

Ok, would the flywheel be better than getting one of those crank rotating tools? Also wondering if it would hurt anything to squirt a dab of PB blaster in each plug hole?

I got the cyl walls as clean as I could, but there were parts I didn't see since I didn't move it far....

 

[Don S]

Re: Adjusting Rockers 4.3

I would try it without the tool first, I really don't think you will need the tool again, but who knows, it's up to you, but that tool comes in real handy if you work on those things for a living.
The other thing is, without the plugs in, you should be able to turn the engine without overtorquing that bolt, It should turn with 40 lbs of torque.
When I clean an engine up, I oil the cylinder walls, turn the engine over a couple of times and wipe the dirty oil off, and keep doing that till the oil at the top of each cylinder is clean. But if you never turned the engine over, yea, you could have rust and water in there.