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Aug 15, 2020 23:17:22 GMT
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So the engine is showing as running very lean on the calculated lambda - your cat is not doing anything at that point, limit is about 4% out of stoichiometry.
However your plugs do not look lean so I am thinking exhaust leak before first sensor. This would richen the engine hence high CO and HC but then throws off the calculated lambda. Can we see Short and Long fuel trims at idle and 2500 please.
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Last Edit: Aug 15, 2020 23:22:37 GMT by wightfug
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Something is wrong here, need to double check the inputs...
OK I see, I was thinking the S-Type had the same final ratio - the auto does 3.07 but the manual is 2.69 which explains why the gears look ok when the box is swapped.
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Last Edit: Aug 8, 2020 13:19:08 GMT by wightfug
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This is what I get with the XK8 ratios
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Last Edit: Aug 7, 2020 22:45:29 GMT by wightfug
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I think I found the S-type gear ratios, 4.68 2.53 1.69 1.22 1.000 0.837 I put them into this rather excellent calculator www.blocklayer.com/rpm-gear.aspx , with the XK8 final diff of 3.06 and tyre diameter of 28" - saved results apx6u.app.goo.gl/b7Fz2600=70 in 5th if you are shifting at 3.5k it looks like this (if I have the numbers right!) So that looks pretty good to me!
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Thanks, that is great information. The diff issue may have been influenced by the racing application! 70 at 2.5K to me seems perfect for everyday driving. Do you know what the stock rpm for 70 would be?
Edit
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Last Edit: Aug 7, 2020 21:09:08 GMT by wightfug
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- Yes it's only the 2.7 Diesel S-type box that fits. The issue is apparently (going by historic posts) the gearing and possibly having to change the rear diff, a Quaife LSD has been used but that of course gets expensive. I would need to find either an alternative diff or if the BMW box is closer then despite needing an adapter plate it could end up being a better solution. Need to do some calculations...
For the smaller rear calipers it's a bit of water pipe!
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Last Edit: Aug 6, 2020 16:48:38 GMT by wightfug
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back to more mundane things - Caliper re-furb. The rubbers can be difficult to get in and using a similar tip I picked up from a Jag forum I used the lid of an Aerosol can cut town to about 20mm.The piston just slides nicely inside it. Load the piston end of the rubber onto the plastic and the caliper end fits easily into the cylinder groove, slide the piston almost all the way in then pull out the plastic and the upper seal drops into it's groove. Took a minute.
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Last Edit: Aug 5, 2020 22:31:24 GMT by wightfug
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S-Type is the same bolt pattern as the Jag V8..., thinking use the S-type hydraulic clutch bearing and a lightweight flywheel with the ring gear pressed on to to it... Do people put the jag V8 into Disco's or is that my imagination? Is the Landy one made by Getrag then ?
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Thanks, that's a good suggestion, I had been on the look out for something BMW/Audi like seems to be the same box from various cars: 120D 320D E87 E90 E91 E92 M47 about the £250 mark used.
Do you know if there is anything (RWD obvs!) that is cable operated, if I can avoid repositioning the stick that would be good.
Further research (well phoning someone that's already done it!) tells me that the Jag s-type diesel 6 speed is the same bell housing pattern and is rated to 600Nm which is right up to 4.2 SC Jags. The Landy disco uses the same box I think but 4x4.
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Jul 31, 2020 20:43:01 GMT
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Phew - well that was a mission. Hub nut done up to 283nm. The most difficult bit was getting the back plate and caliper bolts off. It was all easy with a full set of garage kit to use - but it would have been right at the DIY limit even with my press and tools. If you are considering this I strongly recommend a really good set of circlip pliers as 80mm circlips are something not to be messed with.
biturbo228 From research a Tremec 5 speed box seems to be a solution as the ratios mean you don't have to change the diff. I will need to fool the TCM and ECU into thinking that it still has the auto box - but whilst challenging it is just sensor inputs/conversions. Might go for a German box though as Tremec would have to be new (2-3K) or an import. It has been done in 2007 by "Eliite and performance jags" and later in 2014 ish by Tom Lenthall - both of which now have no mention of it. I am kicking around the idea of setting up to offer a conversion service and/or buying and converting them for sale. - Very early days but I think there is a market.
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Jul 30, 2020 22:58:54 GMT
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Had to take a chisel to the backing plate torx bolts snapped 1, and 2 came out ok.
With help from the right kit (and the owner!) everything came out and new bearing went in with no issues. It was a 12t press but at a guess only 3-4t to get the parts out, certainly no strain. I did check the wheel before I took it apart just in case the MOT people had written down the wrong side!
ABS nut on tomorrow, then caliper rebuild.
Then I might convert it to a manual gearbox..
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Jul 28, 2020 21:57:13 GMT
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Took the upright to the garage where I am freelancing at the moment, dumped the upright in an electrolysis bath for 8 hrs then hit the caliper bolt with an induction heater and a 1/2" windy gun and it came off eventually. The hub nut was as toight as expected but the special tool is a good fit and has a 3/4" fitting so we put the hub in the disk and the disk in a vice. Then added a brace to stop it sliding in the vice and bounced about 80kg off the end of a 2m pole and it moved. Took it the rest of the way with the big impact. Left the circlips to soak in penetrating oil before using the press on Thurs probably - don't think my little 4T will do the job! Bough a caliper refurb kit from Frentech www.frentech-uk.co.uk/ - absolutely lovely stuff, very well machined pistons (heavier than the originals), quality rubber parts and well packaged. At £20/side for everything except new sliders no complaints on the price either.
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Jul 26, 2020 22:58:39 GMT
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Going to swap them all out for standard ones as yes they are a PITA - assuming I can find some for less than a fiver each - Jag tax!.
About as necessary as a radio code nowadays.
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Last Edit: Jul 26, 2020 22:59:46 GMT by wightfug
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Jul 26, 2020 20:14:43 GMT
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Yea I think they employed a close relative of your avatar to use it as well.
As a bonus though the earth cable to the point alongside the ABS sensor was green and crusty inside it's cover where it had broken in many places - so that's a bunch of future/current issues avoided!
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Last Edit: Jul 26, 2020 20:15:43 GMT by wightfug
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Jul 26, 2020 20:08:27 GMT
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I had an early Chrysler Voyager with sliding doors, lovely thing, economical, easy to park, tilt out rear windows to flap and amuse the kids in the car behind... It could transport a huge amount of stuff even with 2 out of 3 rows of seats in. Chocolate gearbox unfortunately.
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Jul 26, 2020 18:25:16 GMT
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Pfff well that was a mission. First up investigate the sticky brakes N/S, - sliders seem ok maybe need more grease, needs new pads as they are way down, I'll just wind in the caliper. Nope not happening, open bleeder, nope still not happening. Remove caliper to bench, 8 bar of air pressure - still not moving in or out. Pulled off the boot and rotated the piston with a stilson - that moved it, some hitting with a hammer and more air, eventually free. The seal had not been put in properly and let water in - Guess that explains the sticky brakes then. New pistons + seal ordered for both sides.
Right,next. O/S wheel off to get the upright off for the bearing change, locking wheel nut first, damn that's tight, no that's really really tight. Sheared the pins inside of the locking key The nut looks like this
and the key had 2 vertical bars in it, now smushed. So I milled out the mess inside of the key and welded a couple of beads in it in the right place then gently placed it on the nut with a BFH, used a spider with the end supported on a jackstand and applied a 4ft pipe. Came off but they were all on stupid tight, even had to give the wheel a good kicking to get it to come off!
Caliper off ok - lots of meat on the pads - I am guessing the N/S were not changed last time as they could not get the caliper to retract! Caliper holder bolts are in stupid tight. Gave up on them and took off the upright off, and put it in the vice to try and get the holder bolts out - one freed off, the other not moving, with a 4ft bar, heated twice, shock cooled, hit it, swore at it and then the 6pt impact socket rounded the nut off . Welded another nut on the top putting loads of heat in, still not moving! Ugga dugga machine tomorrow.
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Jul 24, 2020 17:11:37 GMT
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I did expect them to be low voltage related as per a stack of ABS and gearbox warning that all went away with a battery charge, but having cleared them they have been re-set and current. Have filed them under "entertainment for later" Probably a shared earth as they are all around the same location.
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Jul 23, 2020 22:25:31 GMT
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So result. New Walker O2 sensor in - all fuel trims back to nominal and no more smokey back end. Should be able to borrow a gas analyser to check it out before MOT. Next job the N/S sticky brake that it failed on. Then fitting the massive bearing to the O/S. The not so good news was the persistence of a selection of odd codes in the BCM, - headlight switch, steering wheel adjuster, wiper park and illegal key code - whatever that is and another 4, all of which I will get to latter. Here she is blending into the habitat..
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Jul 19, 2020 20:31:17 GMT
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Fortunately I have access to the Jaguar tool, a 20T press and a big Ugga dugga machine - not sure about a 330Nm Torque wrench though. I am hoping it will not be too much of a PITA. Sheesh! That's tantamount to cheating!
Yeah, good isn't it!
Knowing the guy that has all this gear he will probably have a TW that big!
In other news the flipping O2 sensor is the wrong one, after much hunting OE that early was a Walker 250-24485 and there appears to be very few equivalents. Tempted to chop and splice the plug but the heater resistance is 5.5 ohms so I don't want to risk double the current as it appears to be direct ECU earth switched, plus it might throw a code/light
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Last Edit: Jul 19, 2020 20:35:47 GMT by wightfug
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Jul 19, 2020 14:12:46 GMT
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Fortunately I have access to the Jaguar tool, a 20T press and a big Ugga dugga machine - not sure about a 330Nm Torque wrench though. I am hoping it will not be too much of a PITA.
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