Glen
--Previous Message--
: Glen,
:
: I know you have cut & pasted the
: text in your last post from an earlier
: thread or your notes. Since I do not
: have the head on my engine I see
: several areas where I have to interpret
: what is meant and adjust accordingly.
: Please read over my
: "head-off" interpretation of
: your instructions. Since you can edit,
: please delete or correct anything that
: is wrong so others don't use my
: head-off interpretation incorrectly.
:
: Head-Off Interpretation:
: Find true TDC for piston #1 and zero
: the degree wheel.
: Put dial indicators on the tappets for
: valves 7 & 8 (cylinder #4)
: Zero both the indicators when their
: tappets are truly resting on the cam
: lobe base circles.
: Turn the engine over slowly by hand
: until piston #1 is back at TDC.
: At true TDC both indicators should have
: the same non-zero reading.
: If the exhaust indicator shows more
: lift than the intake, the cam is
: retarded and vice versa.
:
: You said to turn the engine over until
: the exhaust valve for #4 is "just
: closed". With no head on the
: engine... is that just closed with the
: intake just opening... so piston #4 at
: the beginning of what will be the
: intake stroke... lobes 7 & 8 in an
: upward "V"?
:
: Is any of this correct?
:
: Thanks,
: Doug L.
:
:
:
: Checking camshaft timing-
: This is a simple way to check cam
: timing without taking everything apart.
: This is accurate with any symmetrical
: lobe profile. All that is required is
: an accurate TDC indicating mark on the
: crank pulley/damper.
: Set the valves on #4 (or #6) cylinder
: to a wide clearance, say .070 or so,
: using the normal adjustment procedure,
: ensuring that the cam is on the base
: circle when it is set. The actual
: number isn’t important but they must be
: exactly the same. Rotate the engine by
: hand in the normal direction of
: rotation until the #4 (#6) exhaust
: valve is just closed. The TDC indicator
: will be almost lined up. Turn the crank
: a little further until it is exactly @
: TDC. The valve clearances on #4 (#6)
: will be even if the cam is timed
: “straight up”. If the exhaust has less
: clearance than the inlet, the cam is
: retarded, & if it has more it is
: advanced. In order to establish how
: much the cam is advanced/retarded from
: TDC, simply "back up" the
: damper a little* & sneak back up
: towards TDC very slowly, stopping every
: few degrees & checking clearance,
: & stop when the clearance is equal.
: This point is your relationship to TDC.
:
: *- always turn in the direction of
: normal rotation when checking, in order
: to take up the timing chain slack.
:
: