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Oil stem seals
- Scottbob76
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13 May 2019 09:49 #803796
by Scottbob76
Oil stem seals was created by Scottbob76
Hi
On my KZ 440 ltd
Oil was leaking from my exhaust at the head
Noticed someone had wrecked a stud and major bodged it up but couldn’t tighten down.
I have replaced it with a helicoil and ordered new gaskets
How hard is it to replace oil stem seals
Can it be done with just the rocker cover off or is it full engine out job
Cheers
Scott
On my KZ 440 ltd
Oil was leaking from my exhaust at the head
Noticed someone had wrecked a stud and major bodged it up but couldn’t tighten down.
I have replaced it with a helicoil and ordered new gaskets
How hard is it to replace oil stem seals
Can it be done with just the rocker cover off or is it full engine out job
Cheers
Scott
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- Nessism
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13 May 2019 10:23 #803801
by Nessism
Replied by Nessism on topic Oil stem seals
I'm not familiar with the 440 but I do know the seals can be changed on the other KZ bikes with dual overhead cams while the head is still on and the engine is in the frame. To do so requires some inventiveness since you need to make a tool and rig up pry points to depress the valves.
www.thegsresources.com/_forum/showthread...lve-seal-replacement
www.thegsresources.com/_forum/showthread...lve-seal-replacement
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- Warren3200gt
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13 May 2019 10:29 - 13 May 2019 10:29 #803804
by Warren3200gt
Replied by Warren3200gt on topic Oil stem seals
Also need to stop the valve dropping into the cylinder once the collets are taken out. Take the head off and do it properly.
Last edit: 13 May 2019 10:29 by Warren3200gt.
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13 May 2019 10:33 #803805
by Nessism
A cotton rope fed into the cylinder can be used. See the tutorial I linked.
Replied by Nessism on topic Oil stem seals
Warren3200gt wrote: Also need to stop the valve dropping into the cylinder once the collets are taken out. Take the head off and do it properly.
A cotton rope fed into the cylinder can be used. See the tutorial I linked.
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- Warren3200gt
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13 May 2019 10:41 - 13 May 2019 10:41 #803808
by Warren3200gt
Replied by Warren3200gt on topic Oil stem seals
I know, but if it were my bike I'd change all the seals rather than just one so taking the head off would be simpler and would also allow checking valve seats and general bore condition etc.
Last edit: 13 May 2019 10:41 by Warren3200gt.
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- Scirocco
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13 May 2019 14:34 - 13 May 2019 14:39 #803823
by Scirocco
If you put the Piston on TDC you can remove the valve springs and valve stem seals.
An other option is to put compressed air into the spark plug hole.
and i use the VW valve seal tools i have modified for the KZ heads.
I never have to pull any car or bike cylinder head for a valve stem seal change.
If someone is interest into the KZ650 donor head, it´s a free give away without the retainers and buckets.
My 1975 Z 1 B 900 Project
www.kzrider.com/forum/11-projects/605133...ears-deep-sleep-mode
Replied by Scirocco on topic Oil stem seals
Warren3200gt wrote:
Also need to stop the valve dropping into the cylinder once the collets are taken out. Take the head off and do it properly.
If you put the Piston on TDC you can remove the valve springs and valve stem seals.
An other option is to put compressed air into the spark plug hole.
and i use the VW valve seal tools i have modified for the KZ heads.
I never have to pull any car or bike cylinder head for a valve stem seal change.
If someone is interest into the KZ650 donor head, it´s a free give away without the retainers and buckets.
My 1975 Z 1 B 900 Project
www.kzrider.com/forum/11-projects/605133...ears-deep-sleep-mode
Last edit: 13 May 2019 14:39 by Scirocco.
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