[Healeys] BN1 100/4 standard build - Setting up engine timing

Alan Seigrist healey.nut at gmail.com
Thu Mar 24 23:46:05 MST 2011


Stephen -

There isn't a TDC mark per se on the pulley unless someone put one
there.  Sometimes there's a dimple on the back of the pulley.

You find TDC by hollowing out a spark plug, putting it on #1, then
putting a long coat hanger type wire in the hole through the plug and
rotating the crank by hand until the wire reaches the peak position.
Once there you can then mark the pulley and timing cover with some
white-out so you can use a strobe later.

I think Kees also suggested using soap bubble water over the little
plug hole to sense TDC.

RE 34 vs 12 I suspect your car probably is just way off time....

Alan

On 3/25/11, STEPHEN CUSS <stephen.j.cuss at btinternet.com> wrote:
> Hi, Can someone help me understand how to set up the timing on a standard
> BN1
> 100/4 I have just re-build the engine and from the handbook cannot make out
> if
> setting the mark on the crank wheel to Top Dead Centre (TDC) includes the 6
> degrees advance or not I also would like to know how to ensure that the
> distributor is set correctly as I appear to have cylinders 1 and 2 firing
> o.k.
> but not  cylinders 3 or 4 which are sparking but not firing.
>
> Thanks in
> advance for any help with this matter.
>
> SteveC
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