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Topic: Nut for the Cosworth plastic engine cover (Read 184 times) |
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DavidBE
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1998 Ghia X 2.9 24V Auto Estate
Posts: 156
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Nut for the Cosworth plastic engine cover
« on: Aug 8th, 2026, 4:51pm » |
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I'm looking for one of the unique looking (to me) nuts that fasten down the black plastic 'Cosworth' engine top cover, which I didn't even know was missing until I was trying to take the cover off for the first time (for me) a couple of days ago - that one is not really visible when standing in front of the engine. If anyone knows either the Ford part number or the general name if those are some generic kind of nut, not Ford specific, then if someone could tell me the part number or generic name I could search. Thanks.
(It's clearly not vital, but ever since I bought this Cossie Estate in 2020 to replace my fatally rusted 2.3 16V saloon, I've been on what's turned into an ever ongoing obsessive mission to fix everything because it looked so good when I got it - half the mileage in 2020 that the 2.3 had done when i bought that in 2007, and the second of the two previous owners before me had kept it in a heated, dehumidified garage, using it very little and coddling it. Most problems, initially or developed since, have been very small, like the light gone in a switch, but some were tricky for me and/or needed months of hunting some rare part, and while I've got down to just two things (known) remaining to be fixed several times, other things have then immediately either come to light or developed so I've never got below two things to fix. Now the one bit of rust - offside rear wheel arch - has been dealt with and the leaking radiator has been re-built with a new core, once the replacement for the top radiator hose that split when they were test driving the car after the refurb'ed radiator went in turns up, I'll be back to two things left to fix again - this time the light in the R trip computer button has failed, in what's already a replacement for the original trip computer button unit, and the light in the front cigarette lighter unit has a bad connection - except now I've dicovered this missing nut! Grrrr.)
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DavidBE
Full Member
1998 Ghia X 2.9 24V Auto Estate
Posts: 156
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Re: Nut for the Cosworth plastic engine cover
« Reply #1 on: Aug 8th, 2026, 6:09pm » |
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Never mind. For some reason with me every time I spend ages trying to hunt something down, then finally give up and post a request for help (car, computer, whatever) I then have another quick look and immediately find what I couldn't before I posted. Every time. I'd gone through virtually every page of the Cosworth V6 section of the catcar.info original Ford parts catalogue for the Scorpio, looking for the Cosworth engine cover and hoping there'd be a parts number for the nuts. Could not find a page with the engine cover at all. Posted as above. Then started going through the catalogue again while drinking my tea. Two minutes, opened the Air Intake System page which I obviously hadn't before. Not the most obvious section to have the Cosworth engine cover in, but there was the cover along with the FINIS 7334647 domed nuts. Which appears to be a standard M6 Acorn Domed nut ... ordered from Amazon to come tomorrow.
Sorry.
So I just need to sort out those two little lights, hope the temporary silicone hose bandage holds until the new top hose comes at the end of the month (I'm still convinced it will give way in the middle of my MOT on the 19th), and if nothing else goes wrong I will finally for the first time have absolutely everything fixed and working. (Well, apart from the sunroof, but I made a decision not to fix that right after I got the car, because (a) not a fan of sunroofs and have no reason to want to open it given the aircon, and (b) I'm still traumatized by the sunroof on my previous 2.3 saloon, which leaked badly and kept filling up the space between the roof and headlining, and numerous attempts by me and by my garage failed to stop the leak whenever it rained until I actually taped it up with waterproof tape on top of the roof! So as my Cossie EState's sunroof is NOT leaking, and I don't want to use it anyway, I'm leaving it well alone.)
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DavidBE
Full Member
1998 Ghia X 2.9 24V Auto Estate
Posts: 156
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Re: Nut for the Cosworth plastic engine cover
« Reply #2 on: Aug 8th, 2026, 7:22pm » |
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Oh ... bother. Nothing's ever easy with Scorpios, is it? Through my brain fog I missed the fact that while finding a generic M6 domed nut is easy, finding a flanged, extended height domed M6 nut (preferably black) is quite another matter.
So, if anybody has a Cossie they're just using as a donor for parts for another Scorpio, and can spare one of the nuts securing the Plastic 'Cosworth' engine cover, I'd be very grateful.
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DavidBE
Full Member
1998 Ghia X 2.9 24V Auto Estate
Posts: 156
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Re: Nut for the Cosworth plastic engine cover
« Reply #3 on: Aug 12th, 2026, 3:28pm » |
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Hmph. I eventually found an identical M6 17mm high, 14mm flanged domed nut after looking through all 20 pages of results from a descriptive search, though only in a choice of chromed or green finish. The green is hard to tell from a dark grey in anything but bright sunlight, so bought one of those. Interestingly it is listed as being for securing the exhaust of a particular British company but Chinese made 125cc motorbike! Unfortunately, while waiting for it to come I took the plastic engine cover off while trying to do something about my leaking top hose pending the arrival of the specially ordered silicone replacement in 3 weeks, and when I was putting the plastic Cosworth engine cover back on I fumbled a nut ... TWICE, with the two nuts disappearing down the side of the engine. I THINK they're sitting on the plastic tray below the engine, but of course that's almost all not visible from above, and I can't get under to take it off. So I'll have to hope those nuts stay there until the car goes back to my garage early next month, and I'll add taking the under-tray off and recovering the nuts to the work to be done then. So, after finding only four of the five nuts securing the top cover were present, finding and ordering one replacement, and dropping two, I now have three nuts securing the cover. Aaaaaargh.
Between my brain fog and unsteady hands, I really must just accept I can no longer do any work on the car more than checking the tyre pressures and fluid levels. To think I once did most of the work on cars I used to have, up to and including replacing the engine in a Ford Capri single-handed. Ah well - did manage to disassemble my remote, paint the back of the buttons with conductive paint, and restore it to fully working rather than only intermittently working order. I'll have to take that as a big achievement. 
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