Tom,
The 1600's had fan clutches as well. Also I have about 6 spacers to
sell - $40.00 includes shipping within the U.S. Mike Burr Auto
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>From: walter@omni.sps.mot.com (Thomas Walter)
>To: datsun-roadsters@autox.team.net, mclothier@earthlink.net
>Subject: Fan Pulley Spacer Block
>Date: 16, May 1999, 3:31 PM
>
>>Tom,
>>You wrote that you used a solid spacer with the double belt pulley and
>>fan. What kind of spacer was it? Thanks for your help.
>>Mike Clothier
>
>Mike,
>
>I'll copy the roadster mailing list:
>
>The '68-'70 were fitted with a fan clutch and a seven bladed
>fan. This was to help overcome the high underhood temperature of
>those models, running different ignition timing at idle.
>
>[Note, for the life of me I can not recall if 1600's had
>fan clutches. I think it was only 2000's...]
>
>The original fan clutch as a simple piece of metal in almost
>a "Q" shape, a little wax pellet (like you find on a thermostat),
>and a outer pulley that would freewheel.
>
>When the radiator, and fan clutch, would heat up... the wax pellet would
>expand, locking the fan up wit the water pump pulley.
>
>Problem was those wax pellet mechanism's do fail. When they do,
>the fan will freewheel. Go out and open your hood. If you can spin
>the fan by hand (engine cold) it has a fan clutch. Check again
>after a long drive, the fan should NOT spin around.
>
>Since the fan clutches failed, and quite often the cars would
>overheat damaging the cylinder head, Nissan issued a recall.
>
>The recall was to remove the fan clutch, and install a cast
>aluminum spacer between the fan and waterpump pulley. That
>aluminum spacer is something like 3.0" diamter x 1" long, with
>the four fan bolt holes, and little steps to center it on the
>water pump, and fan itself. I am really guessing on the size,
>but just giving you an idea.
>
>Once that spacer is installed, the pulley and fan are locked
>together. Well, that 7 bladed fan is really overkill and too
>noisy. You get the same air flow, and less noise, with the
>replacement four bladed fan.
>
>Reason I mention all this, is I have not seen one of those
>fan clutches in years. Walked out to a friends 'parts' 2000...
>boom, it has the original fan clutch. Never know where they
>will show up. Since a cluch failure means a warped head if
>you are in traffic on a hot day, I would just replace it with
>a spacer and be done with it.
>
>Nissan had the spacers some years ago (no, they will not be
>in the parts catalog as it was a recall item). I am sure
>our Roadster Suppliers will have some on hand, or could have
>some made.
>
>Remember the fan is ONLY needed below 20 mph or so. Once you
>are at freeway speeds, the fan has almost no effect.
>
>Cheers,
>
>Tom Walter '67 2000 SRL311-00547
>Austin, TX '68 2000 SRL311-01278
>
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