Ryan,
The lobs are not necessarily equal, in fact more often than not they wont
be. It doesn't really matter where the lobs on #1 are as long as both valves
are shut.
You're doing OK, now do steps 4 & 5 from the original post as that will tell
you where exactly the cam timing is.
Terry
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]On Behalf Of Ryan Boylan
Sent: Monday, 9 October 2000 7:03 AM
To: [EMAIL PROTECTED]
Subject: RE: Cam Question -Terry
Terry,
When I rotated the engine to TDC compression stroke on #1 the cam lobes on
#1 were up, but the exhaust cam lobe is straight up and the inlet cam lobe
is horizontal (ie about to engage). I would assume that they are both
supposed to be at a more equal level. Is this a correct assumption? If so
what do I do now?
Thanks,
Ryan
>From: "Terry Rudd" <[EMAIL PROTECTED]>
>Reply-To: [EMAIL PROTECTED]
>To: <[EMAIL PROTECTED]>
>Subject: RE: Cam Question
>Date: Sun, 8 Oct 2000 03:31:39 +1100
>
>Ryan,
>I'll assume you have everything back together i.e. rockers, dizzy and
>timing
>cover are all installed. If this is not the case let me know what is
>installed.
>
>You should always do this check after a cam chain has been removed and
>re-installed on any OHC engine, otherwise you get instant tears if you
>attempt to start the engine and you've got this wrong as the valves will
>hit
>a piston.
>
>To check a cam for the correct installation position (also a check for cam
>timing and chain stretch)
>
>1. Rotate engine to TDC compression stroke on #1. If the timing cover is
>not
>install, then the key on the crank will be facing straight up. The cam
>lobes
>on #1 will both be facing upwards and the dizzy rotor will be pointing
>towards #1 plug lead, usually to the front of the cap if the oil pump drive
>is installed in the correct position.
>
>If the dizzy is not installed then the drive tongue will be offset towards
>the front of the car. The ends of the tongue will be facing just behind the
>dizzy retaining bolt hole in the timing cover on the engine rocker cover
>side and just in front of the other bolt hole which is on the passenger
>guard side.
>
>3. Rotate the crank 2 turns and very slowly bring the engine back to TDC
>compression on #1. If the engine will do this step then the valve timing is
>pretty close, but it still can be out one tooth either way. The next step
>checks that it's spot on.
>
>4. Check that the "V" notch in the cam sprocket aligns with the indent on
>the cam thrust plate. You look through the hole in the sprocket that's
>about
>at 11:30.
>
>5. It may not be an absolutely perfect match but anything less than 1/16"
>either way is OK, but if it's out more than that then get back to me and
>let
>me know how far and which way the V notch is out and what the number is
>that's on the sprocket where the cam dowel is located (1, 2 or 3).
>
>regards,
>terry
>
>-----Original Message-----
>From: [EMAIL PROTECTED]
>[mailto:[EMAIL PROTECTED]]On Behalf Of Ryan Boylan
>Sent: Sunday, 8 October 2000 5:42 AM
>To: [EMAIL PROTECTED]
>Subject: Cam Question
>
>
>
>I recently put the head back on my L18, however in doing so the cam came
>out. I am now unsure if it is in the correct position. How do you know the
>correct position for the cam?
>
>Thanks in advance,
>Ryan
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>
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