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1979-1993 & 94 Conv [Subscribe to Daily Digest] |
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Good morning, fellas!
I've got an asterisk problem (*): out of the blue Valkyrie (3D hatch '93) has become very sensitive to a side-wind. It's all ok below 55 mph, quite annoying above 55 mph and dangerously freaking fearsome above 75 mph. My driver's feeling is that it's the front-end which drifs, although when overtaking a bus or a lorry (ok, a truck, but I mean something more like Scania rather than Ford F150) it is the bus's lane where I'm being sucked into - so it may turn out to be the rear-end.
Initially the problem arose when I installed my winter tires and forgot that they're of directional type and misplaced front ones - the handling was about the same as described above. But after I had placed front tires properly, the problem appeared to be gone. After that I left Valkyrie for a month and wasn't driving him until the last week, when I drove it to a shop for engine oil service (and replaced corroded brake lines: the main (in-cabin) one and those on the front calipers) and barely made it back home.
Extensive googling among all saab boards (incl ones which end with ***scene.com and ***link.com and other .co.uk) came up with almost nothing: I found only posts saying that C900 has got to be very resistible to the side-wind. A few posts suggested that this issue has got to be about trailing arm bushings - and yep, I know that mine don't look good, but I don't get it: they're not subject to lateral forces, it's the panhard rod which handles them. Wheel alignment shouldn't be a problem either: I checked it after repositioned front tires and it's only the front camber which is slightly off-spec (-0.5 degree due to worn springs). As far as I have read, negative front camber makes a car being sensitive to tracing rut (quite a common thing here in Mordor), but not to the side-wind.
Tires are good (hakka 7 195/65-15 - 1yr old), pressure ok (32 psi). No play in the tie rod ends or ball-joints or a-arm bushings. No knock or squeal sounds or feel. Below 55mph limit it drives as it should.
The only thing which has changed is the temperature: it was 32F month ago and 10F now. But Hakka (Nokian Hakkapelitta) must not degrade that much in given conditions, it's a real A-level brand and I didn't find any similar complains related to these tires all over the web.
Unfortunately, we don't have any shops here which can dig into the problem. I'm the one to sort the things out first before telling them exactly what to do. And I don't really know what to do. I mean I can install new front springs and new trailing arm bushings and make the front-end geometry into factory specs, but if it doesn't solve the issue (and honestly, I don't believe it will), then I'll completely lost.
Any word of wisdom or real experience will be very appreciated. And FWIW, thanks for listening,
Zig
(*)
Here in Mordor in the school-books there are ordinary problems for ordinary schoolboys and there're some special problems for special egg-heads. The latter are marked with an asterisk: (*)
posted by 188.134.4...
, Sat, 22 Dec 2012 01:04:29, Sun, 23 Dec 2012 11:44:57
, Fri, 21 Dec 2012 10:34:04
, Thu, 20 Dec 2012 01:09:36
, Tue, 18 Dec 2012 06:49:52, Tue, 18 Dec 2012 05:07:24, Tue, 18 Dec 2012 06:04:40, Sat, 22 Dec 2012 10:45:05
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