1972 Saab 99 L - Green
Discussion
Yes, as above, make sure the rad is properly grounded (provided IIRC by the lower side bolts) and that the switch body also shows the same.
Fan should have permanent ignition positive to it.
If you have both of these then possibly a faulty replacement switch. If the old one worked, I'd be tempted to give it a clean and polish (being brass it'll come up lovely!) and stick it back in...
Fan should have permanent ignition positive to it.
If you have both of these then possibly a faulty replacement switch. If the old one worked, I'd be tempted to give it a clean and polish (being brass it'll come up lovely!) and stick it back in...
Spinakerr said:
Impressive graphics for half a century old motor! Probably superior to 90% of what I’ve driven in the past 4 decades.
Great thread, superb knowledge offered, very much what PH can deliver in spades.
My good friend wrote off his Dads 99 four door drifting on wet leaves and dinging the lower sill, even though it still drove nicely and the visual damage was minimal. Same colour as yours, too.
T16 3 door in black with those original alloys would be in my dream garage.
99t said:
Yes, as above, make sure the rad is properly grounded (provided IIRC by the lower side bolts) and that the switch body also shows the same.
Fan should have permanent ignition positive to it.
If you have both of these then possibly a faulty replacement switch. If the old one worked, I'd be tempted to give it a clean and polish (being brass it'll come up lovely!) and stick it back in...
As an aside, if there's an earth problem, you can get or make large washers with tabs to attach crimp connectors, which can be fitted as if an ordinary washer under the switch, allowing you to run an earth direct to the switch body.Fan should have permanent ignition positive to it.
If you have both of these then possibly a faulty replacement switch. If the old one worked, I'd be tempted to give it a clean and polish (being brass it'll come up lovely!) and stick it back in...
Short update on the 99, large amount of Bicester photos - you are forewarned!
I took all the tips shared here on fan diagnosis - many thanks - and everything worked in isolation when prompted, and I wanted to check the new sensor as it was the only new part.
I performed a bit of a 'half flush' but takign out the thermostat, undoing the new radiator drain and topping up the system continuously while pointing the hose in various accessible bits.
Bleeding the system from the top of the thermostate (so accessible!) removed a lot of air, and over the course of 15 minutes it appear the system had got rid of all air pockets.
And just like that, the fan came on:
Lesson learnt - must have been an air pocket around the sensor, or my checks got the contacts in the wiring better seated!
Suitably buoyed, I gave it a quick wash, no time for wax or autobalm, and checked the tyres (which are starting to develop minute cracks and so need to be ditched), and we set sail for Bicester at a steady 60mph.
No issues en route, a little oil weepage continues that probably needs more investigation (although the level on the dipstick remains resolutely on MAX). But it really was a joy to have the 99 running so well on the motorway, great visibility and very comfortable for the 1hr drive. I even had the seat warmer come on at startup, which was welcome as it was a bit chilly.
Bicester was packed - this is not 'cars and coffee' event anymore - thousands of people, and I was lucky enough to meet up with a few PHers, plus catch a few I had not met throughout the day.
5k for this appeared to be a bargain (@lukeharding):
Observer 6 series:
I really like this kind of curio. It even had its registration in the number plate glass!
Some old Ferrari Daytona replica too...
Next up on the Saab list - drive it more int he summer! Some waxoil and rust prevention, take a look at the oil weep situation....
I took all the tips shared here on fan diagnosis - many thanks - and everything worked in isolation when prompted, and I wanted to check the new sensor as it was the only new part.
I performed a bit of a 'half flush' but takign out the thermostat, undoing the new radiator drain and topping up the system continuously while pointing the hose in various accessible bits.
Bleeding the system from the top of the thermostate (so accessible!) removed a lot of air, and over the course of 15 minutes it appear the system had got rid of all air pockets.
And just like that, the fan came on:
Lesson learnt - must have been an air pocket around the sensor, or my checks got the contacts in the wiring better seated!
Suitably buoyed, I gave it a quick wash, no time for wax or autobalm, and checked the tyres (which are starting to develop minute cracks and so need to be ditched), and we set sail for Bicester at a steady 60mph.
No issues en route, a little oil weepage continues that probably needs more investigation (although the level on the dipstick remains resolutely on MAX). But it really was a joy to have the 99 running so well on the motorway, great visibility and very comfortable for the 1hr drive. I even had the seat warmer come on at startup, which was welcome as it was a bit chilly.
Bicester was packed - this is not 'cars and coffee' event anymore - thousands of people, and I was lucky enough to meet up with a few PHers, plus catch a few I had not met throughout the day.
5k for this appeared to be a bargain (@lukeharding):
Observer 6 series:
I really like this kind of curio. It even had its registration in the number plate glass!
Some old Ferrari Daytona replica too...
Next up on the Saab list - drive it more int he summer! Some waxoil and rust prevention, take a look at the oil weep situation....
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