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P38A Is it time to jump to LPG ? (4.6l Gems)

Discussion in 'Range Rover' started by awkwardbob, Jun 14, 2022.

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  1. Karlos the jackal

    Karlos the jackal Well-Known Member

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    I have heard it knackers the engine after awhile thats why I never bothered with it before
     
  2. Colthebrummie

    Colthebrummie Well-Known Member

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    Some.say it makes the engine run hotter and burns valve seats, I dunno if thats true on an engine i good condition.

    Col
     
  3. Datatek

    Datatek Well-Known Member

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    You can get an oiling system to protect the valves I think.
     
  4. Karlos the jackal

    Karlos the jackal Well-Known Member

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    do you know what oiling system it is
     
  5. Karlos the jackal

    Karlos the jackal Well-Known Member

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    thats what I've been told the engine has been looked after anything that needed doing has been done and it serviced every year
     
  6. Datatek

    Datatek Well-Known Member

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    Sorry, no I don't but I read about it in a LZ post. Not too interested as I run diesels so didn't keep a record.
     
  7. brianp38dse

    brianp38dse Well-Known Member

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    The oil for the lpg is called flash lube have a search of that.
     
  8. Datatek

    Datatek Well-Known Member

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    That's the one:)
     
  9. norseman

    norseman Well-Known Member

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    This is my own experience of running LPG; make whatever you like of it.

    I had my 3.9 LPG adapted at 75k miles by an recognised convertor. 10k miles later the engine developed a light tapping at piston speed the moment it reached running temperature, no noise up to that point so I knew it wasn't the hydraulic tappets. Early on switching back to petrol whilst driving resulted in the 'tap' fading away only to return within a mile or so of switching back to gas. Before long the noise was appearing shortly after starting from cold & really loud. A subsequent strip down revealed #3 liner was moving & I had to source a new block.
    Exactly the same thing happened to a mate's 3.9 after roughly the same post-conversion (by a different installer) mileage. Both RR's had enjoyed a perfectly healthy cooling system.

    The good 'ole 3.5 may well be ok with the gas because it has more 'meat' around the liner, but IMO any 94mm bore RV8 is vulnerable :(
     
    Last edited: Jun 18, 2022
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  10. Karlos the jackal

    Karlos the jackal Well-Known Member

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    all I know is mine has had lpg in since it was about 6 month old (previous owner did lots of motorway driving)
    I have a few tweeks to get the lpg back up and running again as local lpg installers had decommissioned it
    thanks @brianp38dse I will look in to the flash lube
    @Datatek like you I previously owned a diesel p38
     
  11. tomcat59alan

    tomcat59alan Well-Known Member

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    I have a Flashlube system in my garage,I could post a photo if needed,when I get up.;)
     
  12. Karlos the jackal

    Karlos the jackal Well-Known Member

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    thanks I'm not sure if mine has one fitted to the system or if I have to put it in the tank
    would be good to see picture will give me a idea what I'm looking for on mine
     
    Last edited: Jun 18, 2022
  13. tomcat59alan

    tomcat59alan Well-Known Member

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    You don't put it in the tank,you drill the inlet manifold and fit the hose adapter and the lubricant is sucked into the manifold,the amount is controlled by the knurled brass knob, you will see a drop in the glass tube and I think it was one drop every five seconds.
     

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  14. tomcat59alan

    tomcat59alan Well-Known Member

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  15. tomcat59alan

    tomcat59alan Well-Known Member

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    The oil reservoir bracket was screwed to the air filter box if I remember correctly.
     
  16. nigelbb

    nigelbb Member

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    The 1960s V8 engine in the P38 is pretty agricultural. I have seen plenty of reports in French Range Rover forums confirming that you can run 100% E85 which is why I tried it in the first place. I started with 25% then 50% then 75% & now fill up with 100%. I get a shock when visiting the UK I need to fill up with E10. I see on www.leboncoin.fr a number of used P38s advertised as running on 100% E85.
     
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  17. norseman

    norseman Well-Known Member

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    Running on it is one thing, but what about all the concerns relating to the damage a high E content can do to an older vehicle's fuel system ?
    I've been steering well clear of E10 in my RRC for that very reason, despite the now scandalous prices for the E5 'protection' grade.
     
  18. Karlos the jackal

    Karlos the jackal Well-Known Member

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    thanks for that I'll have a look in engine and see what side it got the bottle has been fitted thats if one has been fitted to the system
     
  19. kermit_rr

    kermit_rr Green Member Full Member

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    So long as you're not letting the fuel sit for weeks in the system you'll see no problem at all in any vehicle.
    After a while the ethanol starts to turn acidic which is what affects parts of the fuel system in some vehicles, but the p38 is supposed to be immune.
     
  20. Datatek

    Datatek Well-Known Member

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    Ethanol is hygroscopic which will cause rust in older metal fuel tanks, it can also affect plastic components.
     
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