overheating? or normal?

[Buck Rogers]

I recently had my radiator rebuilt and all new hoses
and all new belts including a toasted timing belt on
my 84 4000S quattro, but theres something thats
bothering me... when my car finally gets heated up it
goes to about 3\4 on the temp scale for a while then
the fan kicks in and it goes to about middle which is
normal but only for a second then the fan shuts down
and it goes right back up to 3/4 till the fan comes on
again! anyone have any ideas?


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