The
fan spacers are different on the two cars. Cars that
originally had the air injection emission system (all
68-70 USA cars and some Canadian cars) came with a
fan
clutch and 7-blade fan. This was designed to try to
bring the engine temperatures down during situations
of extreme heat due to the distributor that had to be
installed on the engines to meet the smog idle test.
Locking up the 7-blade fan permanently was a large
power drag and would make a car sound like a hurricane
so
a fan clutch was designed.
The
percentage of 1968-70 fan clutches that failed was
tremendous, and Nissan came out with a solid block to
replace it. The clutch was a good idea, it just seemed
to fail when you needed it the most! The original
clutch was also an unbalanced blob hanging on the end
of the water pump shaft which is not conducive to long
water pump life.
When
this was changed a 4 blade fan was to be installed.
You can still use your 7-blade fan if you don't mind
the drag or the hurricane noise.
Your
spacer should be a solid balanced block, some
mechanics simply jammed a big bolt in the fan
mechanism to lock it. Unless you want to replace water
pumps or help the fan wobble off the pump into the
radiator this is not a good idea. If you hand turn
your engine over (dist cap off, spark plugs out is
easiest, or pull dist cap and plugs, put car in
4th-5th and push car on flat floor) you can usually
identify the original fan clutch. It will have a hole
in its side that will be visible without removing the
fan.
All
the 67 2000's and non USA non smog cars came with the
fan block on the left, with a 4 blade fan that had a
different center hole diameter (1 1/4" versus 1 1/2")
If you are missing these parts on your 67 2000 you
will usually need to use both the later block and the
later fan as the original 67 block has become a museum
piece, now only manufactured out of
unobtainium.
The
round fan block is available to fit a fan with a 1
1/2" hole (part #210-06) or a 1 1/4" hole (part #
210-43).
NOTE:
Bolts are different depending on fan. The original 7
blade fan with the metal center when used with the
210-06 spacer takes the 081-05 bolt. The all plastic
fans 210-04 and 210-13 when used with the 210-06 or
210-43 spacer take the 081-28 bolt.
Be
sure to check the USED COOLING page sometimes we have
used blocks; even the 67.5 original
style.
