What must come off to remove hor. head?

Started by stopintime, December 28, 2011, 03:37:12 PM

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stopintime


I'm planning to combine a head check, repair and paint (hate my air leak and not knowing why it's there)

Do I need to remove the throttle bodies completely?

(I understand about the exhaust and oil cooler)

Maybe a good idea to take off the cylinder and piston too?
252,000 km/seventeen years - loving it

ducpainter

If the base joint doesn't move... leave it.

Otherwise, be really careful of the oil ring. ;D
"Once you accept that a child on the autistic spectrum experiences the world in
 a completely different way than you, you will be open to understand how that
 perspective
    is even more amazing than yours."
    To realize the value of nine  months:
    Ask a mother who gave birth to a stillborn.
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Speeddog

No, you don't have to remove the throttle bodies, just disconnect from the manifolds and get it out of the way.

Really *try* to not break the seal between the cylinder and case...
Gently pry between the head and cylinder to get the head off, etc.
Don't turn the crank unless you restrain the cylinder... strangely enough 2 piston pins and 2 head nuts work perfectly.

I wouldn't take the cylinder and piston off unless you see something suspicious when the head's off.
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stopintime

Quote from: Speeddog on December 28, 2011, 06:27:49 PM
No, you don't have to remove the throttle bodies, just disconnect from the manifolds and get it out of the way.

...............

I wouldn't take the cylinder and piston off unless you see something suspicious when the head's off.

Won't the manifold studs prevent a simple slide?

I've been advised to cover the piston with oil, to see if that stops the leak. If it does, the leak is through the cylinder/piston. Opinion?
252,000 km/seventeen years - loving it

ducpainter

Quote from: stopintime on December 29, 2011, 01:51:10 AM
Won't the manifold studs prevent a simple slide?

I've been advised to cover the piston with oil, to see if that stops the leak. If it does, the leak is through the cylinder/piston. Opinion?
If a generous coating of oil improves the leakdown test significantly then I'd lean towards rings as the issue also.
"Once you accept that a child on the autistic spectrum experiences the world in
 a completely different way than you, you will be open to understand how that
 perspective
    is even more amazing than yours."
    To realize the value of nine  months:
    Ask a mother who gave birth to a stillborn.
"Don't piss off old people The older we get, the less 'Life in Prison' is a deterrent."



stopintime

Quote from: ducpainter on December 29, 2011, 04:29:41 AM
If a generous coating of oil improves the leakdown test significantly then I'd lean towards rings as the issue also.

BTW: how the hell will I get a generous coating in there? Raise the bike to vertical? Spray oil - how?
252,000 km/seventeen years - loving it

ducpainter

Quote from: stopintime on December 29, 2011, 10:15:46 AM
BTW: how the hell will I get a generous coating in there? Raise the bike to vertical? Spray oil - how?
I'd squirt it in there through the plug hole and the throttle body then turn the motor over under compression (spark plug installed) with the starter.

Remove plug and test.
"Once you accept that a child on the autistic spectrum experiences the world in
 a completely different way than you, you will be open to understand how that
 perspective
    is even more amazing than yours."
    To realize the value of nine  months:
    Ask a mother who gave birth to a stillborn.
"Don't piss off old people The older we get, the less 'Life in Prison' is a deterrent."



stopintime

Quote from: ducpainter on December 29, 2011, 10:18:41 AM
I'd squirt it in there through the plug hole and the throttle body then turn the motor over under compression (spark plug installed) with the starter.

Remove plug and test.

Spark plug installed, but not connected I assume  ;D
252,000 km/seventeen years - loving it

ducpainter

"Once you accept that a child on the autistic spectrum experiences the world in
 a completely different way than you, you will be open to understand how that
 perspective
    is even more amazing than yours."
    To realize the value of nine  months:
    Ask a mother who gave birth to a stillborn.
"Don't piss off old people The older we get, the less 'Life in Prison' is a deterrent."