Hello,
When I first attempted to change the transmission fluid and filter after buying my 1990 4L model XJ40, I discovered that the bolts holding the filter in place were done up very tight and their heads were stripped. Unfortunately the worst case was the round-headed bolt in the contre recess of the filter, which looked completely rounded out, and my screwdriver was slipping with only the slightest turn. Unprepared to deal with the problem, I left the old filter in place and just replaced the fluid.
Now it’s time to change the fluid again, and today I attempted to use a head-gripping screw extractor on the stuck bolt. Unfortunately with such a big round hole in the bolt head already, this only helped to make it bigger and rounder. I’m too nervous to use one of the drill-in types of screw extactors because I worry the the bolt won’t be wide enough and might split in place (plus the last time I tried them on this car I went through a whole pack, breaking and then drilling them out one-by-one (instead I drilled through the bolt itself in the end)).
So, my questions:
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Are there any other options for removing the bolt? My next guess is to use a cutting disk on a Dremmel to cut a slot into the bolt, but if I slip and put a hole in the filter, then still can’t get the bolt off, I’ll be stuck. This thread (which I didn’t find before, the search on this new forum site must be better) suggests that as an option though: [xj40] Torx heads on transmission filter bolts stripped
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What are the specifications of the bolt? I asked Jaguar this, and whether they sell replacements, last time, but they couldn’t help. Of course I can measure it once it’s out, but then I’ll have to stop mid-job and drive into town to get a new one (and hope they have one suitable).
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How irresponsible would it be to leave the same filter on again, and perhaps for ever after. This thread gives me confidence that it might be an option: [xj40] Transmission Fluid/ Filter Change? . If it makes any difference, the fluid that came out of it today looked like new.
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While we’re on the topic - the black thing in the round dimple at the bottom of the pan. It looks like the magnet, but a gooey black stuff comes off when it is touched, I’m afraid to try cleaning it in case it’s not a magnet and I end up cleaning it all away. Advice welcome.
Thank you for reading.
The bolt hole where my problem is, circled in red: