1.6 versus 1.8 (moving to crankshaft issue)

[GEEMCB]

Hi, all

Curiouser & curiouser ...

Taking a closer look I see that my 1990 V Special has the larger bolt & 8
slot pulley as per Miata Garage ...

http://www.miata.net/garage/crankshaft.html

VIN is 129xxx & it's a Japanese domestic car.

Not sure what could have happened or how the "big nose" crank got in there -
any thoughts or clarification ?

Regards,
Greg

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Date: Mon, 9 May 2005 21:11:05 +1200
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http://www.burningart.com/meico/pyro/mag.html

"a volkswagen engine case lasts about an hour" !


On 5/9/05, Eric & Ann West <ericwest@internet.co.nz> wrote:
[...]

[ianbell]

Hi
The MX5 Queensland site comments as follows "There are 3 crankshafts for 1.6
litre...The crankshafts are the short nose, long nose and big nose.
The short nose is fitted to the early cars, the long nose is available
primarily as a service part for those cars before the VIN cut in 1991.
... After the VIN cut, the big nose crankshaft is fitted with a
bigger bolt."
Does this help, or only confuse it more?
Ian

[Lloyd]

Hi2u2
I checked mine also which is 1990 BRG and it also has the 8 slot pulley as
per Miata garage.
Could it be that some of these came out with the long nose bolt from new?
Tis a mystery
Lloyd

Lloyd Ashworth
73 Forrester Drive, Welcome Bay, Tauranga 3001
New Zealand
Phone (07) 5442043 Email ashworth@orcon.net.nz

[GEEMCB]

Thanks, Lloyd

Don't feel so lonely now !

Beats me. You could be right.

Ian - as best I can tell my (& now Lloyd's) car was built pre "VIN cut"
which apparently happened in 1991. Both our cars are 1990.

I guess part of the issue is interpreting VIN data - I've never been able to
find an explanation of the VIN (with associated dates etc) for Japanese
domestic cars. Do these count as European spec cars ? - in which case the
VIN cut-off would be correct in my case; but this still leaves the year of
manufacture a discrepancy.

I guess it's feasible that some kind soul in Japan did an engine transplant
at some stage ...

Regards,
Greg

[Euen]

If you ask them nicely and they are not too busy, your local Mazda dealer
should be able to pull up your VIN on his computer and give you the actual
production date along with most of the basic details of how your car left
the factory. Might pay to be buying something at the time you ask though.

Cheers
Euen

[r.v.boxall]

Well, that's strange, because my 1991 BRG V-Special ex-Japan also has the 8-slot pulley, with the big bolt. Last 6 digits of VIN are 142905.

Ron Boxall - MYATA
[...]

[garry]

Perhaps some of these cars were recalled in japan prior to comong over here ?

Garry

[GEEMCB]

Cheers, Paul

Good old facts & data - can't beat 'em

All makes blinding sense now - & I expect that there'll be many drivers of
imported Eunos (Eunoses, Eunos', Eunii ???) who will be mighty relieved.

Regards,
Greg

[Lloyd]

Greetings,
Speaking as one of the 'Eunii alumini' of 1990 BRG who has the long nosed 8
slotted pulley and whoose 1990 NA number is 132xxx it would seem that this
is correct...it would seem that at some stage between the 124xxx and 132xxx
that the 8 slot long nose crankshafts were inserted.
Lloyd

[Simon Lord]

A long-nose would be a Eunos (the Greek plural, if Eunos meant anything in
Greek, would be "Eunoi"), a short-nose would be a Eunuch. The latter
presumably has a higher pitch...

Simon

[EricW]

Aaah! That's why the nuts sometimes come loose!

Eric

[Bob Anderson]

Re my 1990 VIN NA6CE-111751: 4 slot pulley & short nose. Weekend job: I
removed front bolt & slid out key. No sign of any movement or damage to
keyway or key. Sure does seem a strange design with about half of the key
hanging in the air. I cleaned up the keyway with cotton buds & solvent then
reassembled with locktite & new key & bolt. Not really happy with the way I
tightened the new bolt as the method I used to hold the engine still was to
engage 4th gear & apply the handbrake. This gave a "springy" engine lock. I
didn't want to use anything on the pulley in case I shifted it on the
crankshaft. I hope I haven't disturbed the pulley now & have problems with
it! My fix in this case will be an 1800 engine complete I think.

Dr Bob
65531

[Mikkels]

One wonders if it is a good idea to disturb these things but
if you pay close attention to putting the key in the right
way around, use loctite and torque to the correct setting
then what could possibly go wrong?

Not sure what you mean by the key hanging in mid air. It
should engage the pully and the sprocket behind for the cam
belt. It is the wear under the cam belt sprocket that
causes the timing change and the problems overall.

I hope I haven't panicked you but I can always assist should
that 1.8 be needed and think of all those additional horses
and torquey things

Don


[...]