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The only place for a coil spring is up Zebedee's arse
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I've seen 3 different types of diaphragms from different rebuild kits, so it's quite possible you've got an iffy one. More likely that than anything you did, if that was the case I'd expect it to not work from day 1.

Altering the delay never seems to do much. Go into the Comm port properties and drop the baud rate to 4,800.

With you pictures you are doing it right but then editing the link. What should appear is;

enter image description here

Looking at a spare valve block I have here, it appears the PRV is just that, a passive device. No electronics attached to it, just a brass valve.

There's 2 versions of the 4HP22/24, the 4HP22 as fitted to the Classic and the 4HP22EH as fitted to the P38. The EH version is electronically controlled.

On the underside of the valve block, you've got two solenoids (Front Left and Rear Right) but there's also the Pressure Relief Valve and Pressure Switch. Highly unlikely a solenoid would suddenly start leaking that much air out so it could be either of the others.

Only thing that would be of concern for me is that it absorbs water so it might not be too good when I come to use it after it's been in the tank for a few months. Maybe I should just pump it out every couple of months and use it in the lawnmower?

If it won't connect, drop the baud rate to 4,800. Had to do that when trying to use the RSW software on a Classic although works fine at 9,600 on mine.

+1 on spurious garbage due to no comms.

Years ago, a friend had an Austin Maestro van which was fitted with the Prima engine but after around 150,000 miles it was getting a bit tired so he asked someone he knew that worked in R&D at Perkins what he suggested. At the time Austin Rover, as it had become by then, were looking for a power unit for the newer generation Rover 400 series and they didn't think the Prima was up to scratch. Perkins R&D had been refining the Prima to make it more powerful, quieter and more fuel efficient but Rover chose to go instead for something else (Honda I think due to a collaboration with them on the Accord/Rover project). As a result there were a number of these refined Prima engines sitting around Perkins R&D making the place look untidy so one was sneaked out of the factory one night shift and went into the Maestro van. A few weeks later I needed a van to take an Austin Healey 3 litre engine to the south of France and was offered the loan of it. Somewhere, I have a photo of my co-driver's hands holding the steering wheel and the speedo showing 140 mph. That van would cruise at a ton all day long with two people and a big lump of cast iron in it......

Shouldn't be, what are the actual readings? If around 30-40, it should be fine if you clear the faults. If you've got odd readings, or the faults come back immediately, it might be an idea to lift it slightly on a jack to get it off the bumpstops. Some people have had the same fault after changing airsprings when the car is sitting on it's bum.

Instructions for removing the coupler tell you to do it with the steering centralised and tape it in position as soon as it is off. If you don't do one or the other, the ribbon breaks on full lock.

You obviously aren't aware of the Iceberg project then. I live in Perkins home town (part of the ring road is called Frank Perkins Parkway) and know quite a number of people that work or have worked there. Things like the Perkins 4108 were fitted to no end of things, including Land Rovers, but it was far too agricultural and only suited to tractors and boats. Iceberg was a project to investigate the possibility of converting the 3.5 litre LR V8 into a diesel. Whether there was ever any intention to add a turbo I don't know but had it worked I'm sure that would have followed. The Iceberg project was dropped but there were benefits that came from it. The bottom end was strengthened with cross bolted mains, making that the big difference between the 3950cc engine fitted in the Classic and referred to as the 3.9 and the 3950cc engine fitted to the P38 and referred to as the 4.0 litre. The first engine to benefit from this change was the 4.2 unit (same bore as all the others but 71mm stroke so longer than the 4.0 litre but not as long as the 4.6) that was fitted to the LWB Classic.

If all lights are flashing, it is in hard fault. Read the faults then clear them and it should start to work.

Yeah, it would have a design life of 10 years and be falling apart after 5.....

I'll be honest and admit that as OE Boge are NLA I'd go for the Sh*tpart ones. They are cheap and come with a warranty so if they crap out in a few months time, you just get a new set under warranty. It's not like they are difficult to change and if they only lasted 6 months you'd get free replacements for life.

dave3d wrote:

Lack of a level sensor on the coolant expansion tank is obviously one. The main reason for more cracked heads with the petrol V8 and the BMW diesel engines when they are used in the p38 compared to other models with those engines?

Oh I don't know, the straight 6 petrol engines of the same era are notorious for cracked heads following an overheat so I can't see why the diesel should be any different. The V8 doesn't crack heads, it may warp them so the gasket blows, or following a really serious overheat, can pull the threads out of the block or cause a liner to shift but that same will happen on any all alloy engine if you get it hot enough.

Looks like it......

James should send him a bill for the copyright.

That's it, the bumpstops are on the underside of the chassis so you jack the car up, poke them into place (hence 30mm diameter so they sit in there nicely) and drop the jacks so it is sitting on the blocks, read the heights for each corner and write them into the ECU. Then jack it up, pull those blocks out and fit the next size down and do the same. With a jack at both ends it shouldn't take more than about half an hour.

No, it's a separate reluctor ring on the back of the flywheel/flex plate assembly. It has multiple teeth with a gap so the crank position sensor knows the crank position (oddly enough). It is the gap that the ECU looks for.