Skye,
The crankshaft position is not usually a factor, unless this is some
strange engine that powers her car. What you want to accomplish is to
have the rocker of the valve you are adjusting as open as possible at the
time you make the adjustment. How does one know? Hard to tell directly.
Fairly easy to tell, indirectly.
In a four-cylinder engine, where the firing order is the conventional
1-3-4-2,
adjust valve 1 when valve 8 is fully open (rocker fully pressed down)
2 7
the numeric sum of valve to be adjusted plus valve that should be open =
9.
Go for it.
Bob
On Tue, 13 Jan 1998 17:59:21 -0800 Skye Poier <skye@jungle.direct.ca>
writes:
>The other day I thought I'd give adjusting the valves a whirl on my
>girlfriend's car, the Haynes manual gives instructions more or less
>as follows:
>
>Turn the crankshaft ccw until #1 is at TDC and the cam lobe isn't in
>contact with the rocker arm. Measure tappet to valve stem clearance
>and
>adjust as necessary. Rotate the crankshaft ccw 180 degrees and adjust
>#4, 180 degrees again and adjust #3, 180 degrees again and #2. I'm
>doing
>this from memory but I think thats right.
>
>Anyway, my simple question, I don't have a timing wheel for exact 180
>degree
>turns, does it matter if the cylinder is exactly at TDC when I adjust?
> It
>doesn't seem to me that it would matter as long as the cam lobe isn't
>in
>cotact with the rocker arm, unless I'm missing something (which is
>entirely
>possible).
>
>Oh yeah, and its a front wheel drive so the engine is mounted.. whats
>the word.. transverse? I think the front valves are intake and the
>back
>ones are exhaust. I'll have to figure that one out though.
>
>Cheers,
>Skye
>
>--
>www.mgb.bc.ca
>
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