[Roadsters] valve seals

[Pat Horne]

Another thing is to NOT push the whole rope into the cylinder, leave one 
end out and secure it or you may have to pull the head to get the rope 
out! My father was an aircraft mechanic during WWII and when an engine 
went bad the roped a cylinder and flew to the maintenance facility on 
the remaining engines. Many times they had to pull the head to get the 
rope out.

Peace,
Pat

Thusly spake Paul, On 1/29/2011 2:09 AM:
>    Use a cotton rope, not plastic!  Stuffs in easier and any frayed pieces
> left in the cylinder will burn off.
>
> Paul
> Ohio
>
> -----Original Message-----
> From: datsun-roadsters-bounces at autox.team.net
> [mailto:datsun-roadsters-bounces at autox.team.net] On Behalf Of Graeme
> Suckling
> Sent: Friday, January 28, 2011 10:13 PM
> To: datsun-roadsters at autox.team.net
> Subject: Re: [Roadsters] valve seals
>
> On 29/01/2011 12:44 PM, Larry Braddock wrote:
>> Anyone know if I'm able to replace valve stem seals on my 66 1600 without
>> taking the head off?
>>
>> Larry
>> ________________________________________
>>
> Sure you can!
> There are several methods of keeping the valves in the closed position
> while you do the job.
> I have never used, it but apparently the Indian Rope Trick is the
> cheapest and safest method I believe.
> You place the piston of the relevant cylinder at TDC compression stroke.
> Piston at top of stroke, both valves closed.
> Give the valve tops a bit of a tap with a hammer to free up the retainers.
> Then you feed into the spark plug hole a length of rope or cord so that
> it snakes around and fills the combustion chamber, thus physically
> preventing the valves from dropping into the cylinder.
> You then use a lever type valve spring compressor to release the
> retainers and remove the springs.
> R&  R the seals then re-assemble the valves for that cylinder.
> Repeat for each cylinder.
> The advantage of this method is that the valves are jammed shut
> positively by the cord.
> They may drop slightly but can easily be retrieved by hand or jamming
> more cord into the chamber.
> You can also pressurize the cylinder with compressed air but if the
> pressure leaks away for any reason, the valves will drop.
> I suppose you could continuously pressurize the cylinder but it wouldn't
> be as secure as the rope method.
> One little fart and game over:-!
>

-- 
Pat Horne, Owner, Horne Systems
(512) 797-7501 Voice		5026 FM 2001
Pat at HorneSystemsTx.com	Lockhart, TX 78644-4443
www.hornesystemstx.com
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