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> Stuck 6 cyl head, No, its not stuck there....
mr914
post May 15 2014, 11:12 AM
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Pulling apart that Aluminum case 2.0 motor in anticipating to sell it and cant seem to get one of the heads off.

Motor has been sitting for 20 plus years and rotates freely.

4 heads came off with a little more than a ketchup bottle thump.
1 head came off with the cylinder attached

The other one, wont seem to budge. Made sure all washers were removed. been soaking with PB Blaster for a couple of days

BTW: motor had been sitting for several years and a mouse had made a nest on top of that particular cylinder.

Hence - Mouse motor...

Any suggestions? (IMG:style_emoticons/default/confused24.gif)


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stugray
post May 15 2014, 11:21 AM
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I would suggest filling up the cyl with a little oil while at BDC, reinstall spark plug, close valves and rotate motor.

If you did it adruptly (and if there is any compression left) it might pop the head loose.

But if you have already disassembled all the other cylinders, then that might not be easy.
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Justinp71
post May 15 2014, 11:21 AM
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More power! (IMG:style_emoticons/default/smash.gif)

When I did mine I removed the entire assembly with the 3 heads and cam towers, some light prying was necessary, just be careful not to scratch any important surfaces. If your pulling the barrels off the pistons, maybe see if you can pull the head and barrel of together and then try to knock the barrel off with a mallet.
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mr914
post May 15 2014, 11:43 AM
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Stugray = you may be on the right track.

With no cams etc... Leak down tester and let compressed air move it a bit.


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mr914
post May 15 2014, 11:44 AM
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5 of 6 cylinders heads off

3 cylinders off
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Mike Bellis
post May 15 2014, 12:17 PM
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Put a spark plug back in it at BDC and rotate the crank to TDC. Might pop it off.
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mr914
post May 15 2014, 12:21 PM
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If I was going to do that, shouldn't I remove the other pistons first?
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Mike Bellis
post May 15 2014, 12:51 PM
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QUOTE(mr914 @ May 15 2014, 11:21 AM) *

If I was going to do that, shouldn't I remove the other pistons first?

Yes
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Jon B
post May 15 2014, 01:15 PM
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Check to make sure all cylinder head nuts are removed.

With rubber hammer, or metal hammer against block of wood, hit head sideways in both directions several times. It should break bond (not fins).

Jon B.
Vista, CA
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KELTY360
post May 15 2014, 01:44 PM
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Wouldn't the rope trick work? Get piston at BDC, thread a rope into the cylinder through the spark plug hole and then rotate engine. Never done it myself but I've heard it works.
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toolguy
post May 15 2014, 01:56 PM
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do not pry against the cylinder fins, they will break off easily. . If you're sure all 4 head nuts and washers are off, hit it with a RUBBER mallet. . it's better to tap many times than one hard time. . .
I was taught to hit on the top and bottom only which is the way the wrist pin/crank rotates. . . if you hit sideways it can bend the rod. .
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Jon B
post May 15 2014, 02:23 PM
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QUOTE(toolguy @ May 15 2014, 12:56 PM) *
...if you hit sideways it can bend the rod.

Bend a rod with a rubber hammer? I don't think so.
The piston has some room to slide, side-to-side, without touching the rod.
If the cylinder can move in the case spigot, it can be pulled off with the head.

Jon B.
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Nine_14
post May 15 2014, 02:26 PM
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If none of the above given suggestions helps, bring the piston to the lowest point,
fill cylinder with water and put the whole package in the freezer for a night and hope
that the soft spot is the head.
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mr914
post May 15 2014, 02:37 PM
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QUOTE(Nine_14 @ May 15 2014, 03:26 PM) *

If none of the above given suggestions helps, bring the piston to the lowest point,
fill cylinder with water and put the whole package in the freezer for a night and hope
that the soft spot is the head.


That's a creative approach. I had never heard of that one.
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mr914
post May 15 2014, 02:42 PM
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Confirmed last night that all of the nuts and washers are off.

Using a 1# plastic tipped dead blow hammer with quite a bit of force.

One of the other heads came off with the cylinder attached. This one is stuck on both sides

Penetrating OIL is doing its thing, since last night and will get back to it after 7 tonight.

So far.

1) using a wood block and a bit more force sounds like first option.
2) Putting plug back in and rotating to see if compression will move it.
3) use leak down tester with cylinder at either TDC or BDC and let compressed air do its thing.

Will give those a try.

Thank you for your suggestions.
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Scott S
post May 15 2014, 02:46 PM
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QUOTE(KELTY360 @ May 15 2014, 11:44 AM) *

Wouldn't the rope trick work? Get piston at BDC, thread a rope into the cylinder through the spark plug hole and then rotate engine. Never done it myself but I've heard it works.


(IMG:style_emoticons/default/agree.gif)

I did this last week to a Jag motor - works awesome. Just enough push to pop it off.
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Nine_14
post May 15 2014, 02:48 PM
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QUOTE(mr914 @ May 15 2014, 10:37 PM) *

QUOTE(Nine_14 @ May 15 2014, 03:26 PM) *

If none of the above given suggestions helps, bring the piston to the lowest point,
fill cylinder with water and put the whole package in the freezer for a night and hope
that the soft spot is the head.


That's a creative approach. I had never heard of that one.


I never used this method to remove cylinder heads, but it is working fine if you
want to remove dents from motorcycle tanks.
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injunmort
post May 15 2014, 04:08 PM
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gently heat the seam with a torch or heat gun, then tap on it again with the dead blow. the expansion from the heat should free it up. good luck
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get off my lawn
post May 15 2014, 05:04 PM
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M-80 in the spark plug hole.
hey it works on cats and frogs ....... (IMG:style_emoticons/default/poke.gif)
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76-914
post May 15 2014, 07:04 PM
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Anyone that would do that to any animal is a sick fuck and should seek professional help.
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