Daniel,
No Thanksgiving? Traitor!
oh wait.....
Anyway, fan clutches usually fail, in my experience, by not engaging. They
may limply spin the blades, but not to pump speed. (you can test this by
hand. Simply grab....) Their purpose, as you know, is to reduce horsepower
drain when the added cooling is not needed. If that is your goal, why not
an electric water pump and auxiliary electric fan. Very recently we are
seeing cars with electrically clutched alternator drive pulleys, much like
AC compressors have. Rather than reduce the amount of output from an
alternator (and horsepower requirements) by regulating the charging,
automakers are simply clutching and declutching the pulley as required.
Peter
and why should 50 be the Finale?
=====
At 03:58 PM 10/21/2003, Daniel1312@aol.com wrote:
>Hi Peter,
>
>I see (by reference to a parts manual)
>
>The Ital in line A+ (Turbo project Morris Travellor engine) is different
>and has a funny water pump that has a threaded boss that the clutch part
>has to be tightened on to and it will not easily undo unless I guess you
>ran the engine backwards for long periods of time!!
>
>What else happens to them assuming they stay on the engine?
>
>Thanksgiving - maybe in 2005 or 6 but 2008 I will be at Carlisle in May
>and Sprite Fifty Finale!
>
>Daniel1312
>
>In a message dated 21/10/03 13:42:41 Pacific Daylight Time,
>nosimport@mailbag.com writes:
>
>>Daniel,
>> The clutches over here in the colonies were on Spitfired Midgets.
>>The problem was that the clutch, with fan, would detach from the end of the
>>water pump and go sailing into the radiator. The attachment was
>>accomplished with a corrugated spacer that was crushed as you pressed the
>>clutch onto the pump shaft pulley extension. (part no. UKC759) Not a
>>terribly reliable connection, and prone to rapid failure if either the pump
>>or clutch themselves were deteriorating.
>> Go to a breakers, and look at the number of radiators exhibiting a
>>circular wear pattern. Spitfires had the same problem. Also, TR7 (wedgies)
>>used the same clutch and crush ring, but on the idler pulley. Never seemed
>>to fail as much. (but when a TR7 pump goes bad.... hoooboy)
>> Peter C (you coming over for Thanksgiving?)
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