Thanks very much Vance - also received some helpful responses off-list from
Bob Lang and Michael Porter - between all responses (that pretty much all
concur) I think I have plenty to go on so thanks to all once again.
Regards Joe.
-----Original Message-----
From: Navarrette, Vance [mailto:vance.navarrette@intel.com]
Sent: Thursday, 14 May 2009 2:20 AM
To: Joe Santamaria; 6pack@autox.team.net
Subject: RE: [6pack] Measuring valve lift
Joe:
There are many ways to do this, you need to find one that works for
you. Here are some ways that will work, depending on the motor, rocker arm
size, etc.
The problem with both the adjuster and the rocker tip is that the
rocker sweeps through an arc, and so getting an accurate measurement is a
problem, as you have discovered.
To measure the lobe lift, loosen up the adjuster until you can push
the rocker out of the way, then put your dial indicator tip in the push rod
cup. It is important that the pushrod not touch the cylinder head at any
point during the measurement - otherwise the measurement will be inaccurate.
To measure the valve lift leave the arm in place, and put the dial
indicator tip on the valve spring retainer (anywhere will do). You can
compute the lobe lift using this value, but it is less accurate by virtue of
the relatively wide tolerances on rocker arm ratio.
Vance Navarrette
Cogito Ergo Zoom
I think, therefore I go fast
-----Original Message-----
From: 6pack-bounces@autox.team.net [mailto:6pack-bounces@autox.team.net] On
Behalf Of Joe Santamaria
Sent: Wednesday, May 13, 2009 4:41 AM
To: 6pack@autox.team.net
Subject: [6pack] Measuring valve lift
Hi guys,
I am a regular member of the list for some years now and excuse me as I
don't have a TR6 but have five Saloons all with 2500 PI engines, one with a
TR6 cam, so I find all the content on engines on this list most helpful but
can't participate as much on the TR 6 per se. I'd love to have a TR6 but
unfortunately out of budget at this stage.
I do have a question though, on how to correctly measure valve lift with cam
and rockers in place.
<snip>
Cheers
Joe.
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