Our '89 744 Ti has a rubber bushing that holds the pusher fan thermoswitch in the rad sidetank. That bushing is rotten now and needs to be replaced. I'm hoping the dealer will have one in stock so I can get one tomorrow (Monday) otherwise I guess the car is down until I can get one on Tuesday either through the dealer or a third party parts store that can bring one in.

The whole thing looks to me to be a pretty flakey design. I see in the FAQ that one way to prevent the thermoswitch from popping out again is to basically tie it down with a cable tie.

The thing is I'm probably just going to transfer a nice 2 speed puller e-fan setup from an older 240 that we don't use anymore into the 740 and I live in a part of the world where it's usually never hot enough to require the extra pusher fan. The e-fan hardly ever kicks on in the 240, even in the mid summer so I'm wondering I why I would ever need the pusher fan. The 240, however, doesn't have A/C and the 740 does.

So the bottom line is I'm not sure if I really need that pusher fan or not. Does A/C make that much of a difference to the demands on the cooling system ? And wouldn't a 2 speed 16" e-fan more than compensate for the loss of the pusher fan ? We seldom need to use A/C around here except for maybe a 4-6 weeks of the year and that e-fan setup in the 240 hardly ever kicks in to low speed and I don't think it has EVER kicked into high speed mode even in stop 'n go traffic.

I really would be just as happy to plug that hole off permanently and forget about the pusher fan and just rely on my 2 speed 16" e-fan I'm going to take out of the 240.

Thoughts ? Comments ?

Has anybody found an easy and reliable way to plug that hole off in the rad side tank off ? How did you do it ?

Thanks.