Could be either. The sound is different, at least to my ear, but if you haven't
heard both that doen't help. However, both have a fairly solid sound, as you
might
imagine, coming from the high speed collision of massive pieces of metal. I've
changed bearings many times without removing the engine, on Triumphs (not
Spitfires) and on other makes. Just get the car high enough so you're not
cramped. I've always changed both mains and rods any time I was at it. Not
having done a Spitfire, I can't comment on any specific issues there. One
thing I
always do before pulling anything apart is have someone else listen to the
noise.
Preferrably someone with more experience.. I get paranoid about engine noises
and
have been known to spend much time and energy looking for and unfortunately,
sometimes fixing, non-problems.
-Gary
Dave Chu wrote:
> In message <00c001bef3e4$02788b20$94ac2ad1@tomshirley>you write:
> >
> >> The only draw back is, it now does not
> >> have as good pick up as before (even with the now AN needle). I guess is
> >> because with the .009" jets it is not sucking in loads of fuel like it was
> >> doing with the .01" jet. With the car running better and
> >> less noisy I now notice a knocking noise from the engine. It is there
> >> when the car first starts up and sometime I can hear it while
> >accelerating.
> >
> >Sounds like you've got the mixture too lean. Better check your plugs. If
> >they're white or light gray looking, your mixture is too lean and in a worst
> >case scenario, you'll burn a piston, probably #2 or #3.
> >
>
> I don't think the problem is the mixture. I've check it with my
> Colourtune (finally got to use it) and set it a little rich. To
> make sure I also pulled the plugs after a drive and found them to
> be gray/brown.
>
> However, I did recall awhile back there was a discussion about bearings
> making knocking noise when worn. But I don't remember if it was the main
> or rod bearings. On the other hand it can be just me looking for more
> things to do on the car now that I have the electrical (BTW, thanks for
> the wiring diagram) and carb. fixed up.
>
> Dave |\ | | |
> Dave Chu \/ \/ | /| | |
> Dept. of Elec. & Comp. Eng. |/ | | |
> Concordia University Voice:(514)848-3115 Fax:(514)848-2802
> 1455 de Maisonneuve W. H961 Email:dave@ece.concordia.ca
> Montreal, Quebec, Canada H3G 1M8 http://www.ece.concordia.ca/~dave/addr.html
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|