Topica Loopframe_Guzzi Archive


Subject: Re: Valve Adjust Question

Author: Martin Cooke

Date: Jul 27, 2002, 5:35 AM

Post ID: 1710681139


dunno how much you're rotating the crank to achieve the largest gap, but i
would think largish rotation would be needed as at TDC compression valve
lifter is probably* at centre of base circle of the cam. lift would not
occur for several degrees.

*not actually checked this, but it's true for Ducati's & others.

cookie


----- Original Message -----
From: "Keith Ruff" <klru-@fcc.net>
To: <Loopfram-@topica.com>
Sent: Saturday, July 27, 2002 12:53 PM
Subject: RE: Valve Adjust Question


 BTW, the way I found the point of the largest gap was by holding the
feeler guage against the valve/rocker arm and rotated the engine around
TDC until I got a gap/maximum gap, then used that point for adjustment
to spec.

Keith Ruff
71 Police Ambassador - NJ

Keith Ruff wrote:
 I did this and when the piston was at it's highest point (closest to the

spark plus) the rocker arms would shift from one coming down to the
other coming up, but would require me to tweak the stroke a bit to get
the gap to open up so I could check and adjust the gap. For some
reason, the left side took more work to make this happen as the intake
valve stayed tight until I backed out the piston a bit from TDC. I'm
waiting for a new cap and rotor to arrive, hoping it will be here today,

and am running out to get new plugs. I have installed a new condenser,
new wires, and new points - gapped them w/o a problem. I guess I'll get

it all back together and see how she runs. If too noisy, I'll shut down

and try again. Don't know why a simple valve adjust is giving me
problems....

Keith Ruff
71 Police Ambassador - NJ

Martin Cooke wrote:
 to find tdc compression, remove plugs turn engine over with your
finger
 
 
 in plug hole, when you feel pressure that's the compression stroke.
continue turning until piston is at tdc. that is where to adjust
valves.
 
 
 
cookie
----- Original Message -----
From: Greg Hopkins
To: Loopfram-@topica.com
Sent: Saturday, July 27, 2002 4:48 AM
Subject: Re: Valve Adjust Question


The piston has to be at the TDC position on the compression stroke,
then
 
 
 
the exact point of adjustment may vary by a fe degrees according to
cam
 
 
 and lifter wear. The way to find the exact position is to go to tdc
and
 
 
 set th clearence, Then move the crank back a little and check it
again.
 
 
 If it changes then re-adjust and then move it back the other way and
look for a different reading . The point you are looking for is the
area
 
 
 
around TDC with the biggest clearence, remember to do this with a
dead
 
 
 cold engine. Greg LAPD 850

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