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mtskull

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About mtskull

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    West Yorkshire

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  1. mtskull

    FV432 driving on street query

    Admittedly this was 18 years ago but when I dropped the kerb (and lowered the footway) for access to my drive, the local authority allowed me to carry out the work myself; the only work carried out by an outside contractor was the final surfacing. All that was involved was a site visit from a man from the highways department, who listened as I explained what I proposed to do, expressed surprise that I wanted to do it myself, gave me a specification to follow and told me to go ahead. I'm pretty sure that nobody ever even came back to check that it had been done properly.
  2. mtskull

    Brake cylinder sleeving

    I have used this company many times and found them to be friendly, helpful and knowledgeable. With turnaround times in the order of a couple of months, they are not quick but the cost is reasonable and the quality excellent. A word of warning: DO NOT send your parts to the address shown by a Google search; it is out of date and your parts will get lost. Make sure you use the address from their own website.
  3. mtskull

    WW1 Thornycroft restoration

    Agreed; although in my experience a clean piston amongst sooty ones suggests a water leak into the cylinder.
  4. mtskull

    RR B80 oil pressure/starter motor

    Thanks for that; we will certainly back track up the wires. We know where the solenoid is; it is integral with the starter but, in the absence of a wiring diagram, I wouldn't rule out there being another relay in the circuit somewhere. That said, evidence now suggests that it is the auto box neutral sensor which is at fault.
  5. mtskull

    RR B80 oil pressure/starter motor

    Things I learned this week: 1) The 24v starter won't even think about turning when connected to 12v supply; no real surprises there. 2) The fault is still present, so unless we have two starters displaying identical, intermittent faults, the problem lies with the vehicle. We are closing in on the source of the trouble......
  6. mtskull

    RR B80 oil pressure/starter motor

    Thanks Richard, 30psi when driving is in accordance with what I've been seeing on the gauge, so if that's normal I'm not too concerned about it being low at idle; maybe I will just tweak the idle speed up a bit. Our starter doesn't have a visible solenoid either; it is contained inside the casing at the rear of the starter. I bench tested it with the casing off just to check that everything worked as it should; it does with no problems until it is installed and warmed up. I have now swapped starters with another 12v B80 in the fleet, so if the problem is cured we will know that it is the starter that is at fault, whereas if it persists, we will know that it is a fault on the vehicle. Andy
  7. A couple more B80 queries: Went out for a run last weekend; warm weather and engine working fairly hard. Water temp steady between 160-180F, oil temp much the same. When properly hot, oil pressure at idle was only showing 5psi, increasing to 15 at fast idle and 30-40 when driving. Is this normal, or should we be investigating the condition of the oil pump and bearings? My other query concerns the starter motor (Simms, 12 Volt). It works fine time after time when cold but once the engine is hot, nothing happens when pressing the starter button except that the ammeter shows a discharge of 10 Amps. I have taken the starter off, inspected it and bench tested it successfully through 100 cycles but when re-installed, the same issue arises. I initially thought that the pinion might be jamming on the ring gear but there is not even any clicking from the solenoid; furthermore, turning the engine manually doesn't help (although it will start on the hand crank). I suspect that the solenoid has developed a fault that only manifests itself when hot. Has anybody else experienced this? We have a spare starter but it is military spec. and is marked 24 Volt. Can anybody tell me if there are any fundamental differences, or is the only implication of using this on a 12 Volt system the fact that it would draw twice the current? Any thoughts/suggestions welcome.
  8. mtskull

    Rolls Royce B80

    A couple more B80 questions: Went out for a run yesterday; engine working fairly hard. Water temp steady between 160-180F, oil temp much the same. When properly hot, oil pressure at idle was only showing 5psi, increasing to 15 at fast idle and 30-40 when driving. Is this normal, or should we be investigating the condition of the oil pump and bearings? The other query concerns the starter motor (12 v). It works fine time after time when cold but once the engine is hot, nothing happens when pressing the starter button except that the ammeter shows a discharge of 10 Amps. I have taken the starter off, inspected it and bench tested it successfully through 100 cycles but when re-installed, the same issue arises. I initially thought that the pinion might be jamming on the ring gear but there is not even any clicking from the solenoid and turning the engine manually doesn't help (although it will start on the hand crank). I suspect that the solenoid has a fault that only manifests itself when hot but if anybody has experienced the same problem or can offer any advice, that would be most welcome. Andy
  9. mtskull

    Thornycroft Big Ben

    As long as you are certain that the cracking is only affecting the external water jackets and if leakage is all that you are concerned about, there are several products which you add to the coolant which will seal the cracks permanently. I can personally recommend Holts Wundaweld. I recently tried this on a Rolls-Royce B80 with frost damage (more in hope than expectation of success) and it hasn't leaked a drop since.
  10. mtskull

    WW1 Thornycroft restoration

    For what it is worth, my gut feeling is fuel starvation. Could the problem be something as simple as incorrect float level? You mention that there is a way to hold the float down; I would suggest holding it down slightly until the engine note changes as the mixture richens, then begin to open the throttle.
  11. mtskull

    Birmabright (New old stock)

    It might be of use to the chaps rebuilding Donald Campbell's Bluebird hydroplane, as it was originally skinned with the stuff. Google "Bluebird Project".
  12. Not exactly playing Devil's advocate myself but, having spent many years in the motor trade (a long time ago) and having recently become involved with the maintenance of some heavy-ish preserved vehicles, I am of the opinion that no vehicle used on the road should be exempt from MOT testing unless it is operated by an organisation with the capability and responsibility to subject it to a stringent routine maintenance schedule, e.g. The MoD and emergency services. A case recently came to my attention, of a preserved vehicle from the 1950's which is MOT exempt and in use on the road. One day, the owner complained that the brakes were poor. To cut a long story short, it transpired that the front brakes were not working at all (cylinders all seized), the rear brake cylinders were working (but leaking) and one rear hub oil seal had failed, allowing oil to contaminate the linings on that side. So, only one wheel with effective braking on a vehicle which weighs over eight tons and is capable of over 60mph. How long the vehicle had been used on the road in that condition is anybody's guess but my point is that a rolling road check as part of an MOT test would have flagged up these issues long before the vehicle became the deathtrap that it was. Yes, I know that you all maintain your vehicles to an impeccable standard but there are also people with older vehicles who will do the minimum that they can get away with. The requirement for an annual MOT test raises the standard of that minimum and, let's face it, is a relatively inexpensive way of obtaining a pretty comprehensive roadworthiness check for your own peace of mind.
  13. mtskull

    WW1 Thornycroft restoration

    That oil fill tube is a work of art! It speaks volumes about the high standards that you set yourselves, that you consider it to have been "done wrong". Fingers crossed that you meet your deadline....
  14. mtskull

    AEC O854 Coles Crane

    Apologies for raking up the past; I have come late to this thread. Would that Class 50 be "Thunderer" by any chance?
  15. mtskull

    WW1 Thornycroft restoration

    I have just been comparing the latest photos with the "as found" photos from the first post in this thread. Very impressive indeed, especially for an "entry level" restoration! I can't wait to see a video of it running.
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