1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.
  2. Welcome To LandyZone!

    LandyZone is the biggest Land Rover forum on the net. We have plenty of very knowledgable members so if you have any questions about your Land Rover or just want to connect with other Landy owners, you're in the right place.

    Registering is free and easy just click here, we hope to see you on the forums soon!

P38 Diesel. What engine temperature is normal?

Discussion in 'Range Rover' started by Larsern, Aug 18, 2017.

< Previous Thread | Next Thread >
  1. Larsern

    Larsern Member

    Joined:
    May 20, 2015
    Posts:
    52
    Likes Received:
    13
    Location:
    Trondheim, Norway
    Some thoughts for the weekend.

    Having just changed the head gasket due to overheating / loosing water ... (another tread, all fixed now)
    Being afraid of overheating again, I started running the engine with the Nanocom hooked up showing engine temperatures. The needle is dead in the middle at all time.

    This is the temperatures I get:
    Normal city or highway driving flat or moderate hilly: 92 - 96 C.
    Hilly but not long steep driving: 95 - 99 C
    Steep gradients (5%-8%) 102 - 105 C (once up to 106 C)
    Downhill no pedal: 82 - 83 C

    Would be funny to hear what temp range you get for the various driving.

    Have a nice weekend.

    L
     
  2. listerdiesel

    listerdiesel Well-Known Member Events Planner

    Joined:
    May 3, 2009
    Posts:
    3,275
    Likes Received:
    278
    Location:
    Rushden, Northants, UK
    Did you change the water pump and thermostat?

    Peter
     
  3. Colthebrummie

    Colthebrummie Well-Known Member

    Joined:
    Jan 24, 2017
    Posts:
    8,418
    Likes Received:
    9,158
    Location:
    Thatcham
    For me, normal temperature is anything where there isn't steam spewing out.

    Col
     
    Dopey and myfirstl322 like this.
  4. tarphenry

    tarphenry Well-Known Member

    Joined:
    Oct 6, 2014
    Posts:
    1,500
    Likes Received:
    476
    Location:
    bury lancs
    It makes sense that the temp will change dependant on load.
     
  5. Larsern

    Larsern Member

    Joined:
    May 20, 2015
    Posts:
    52
    Likes Received:
    13
    Location:
    Trondheim, Norway
    New termostat, waterpump, radiator,(2), expansion tank cap, coolant,....

    Just would be very interesting to learn about other's temp observations using Nanocom.

    Helping to calm my nerves that are a bit fringy after all the troble I had before changing the head gasket
     
  6. tomcat59alan

    tomcat59alan Well-Known Member

    Joined:
    Apr 3, 2011
    Posts:
    18,302
    Likes Received:
    12,183
    Location:
    wirral and triquivijate
    Send me your Nanocom and I'll keep you posted.:D
     
    Dopey likes this.
  7. Larsern

    Larsern Member

    Joined:
    May 20, 2015
    Posts:
    52
    Likes Received:
    13
    Location:
    Trondheim, Norway
    Update: Have made a static adjustment of the FIP. It was on 0.80 mm instead of 0.90mm. After this the engine temp went down by 3-4 degrees in all conditions.
    0.80 instead of 0.90 what does that mean, was the injection retarded or forwarded? If it was retarded I should suspect this meant a surplus of fuel for each injection and this could give higher temp.
    Any thoughts?
     
  8. Grrrrrr

    Grrrrrr Technician, Bodgit & Scarper Ltd Full Member

    Joined:
    Jul 8, 2012
    Posts:
    16,952
    Likes Received:
    7,119
    Location:
    Buckinghamshire, UK. ('95 DT)
    Good thought!

    My needle always sits at 12 but I've seen some interesting temperatures on the Nanocom. Think I might have some traces on my laptop. Will have a look later.
     
  9. myfirstl322

    myfirstl322 Well-Known Member Full Member

    Joined:
    Dec 29, 2012
    Posts:
    34,427
    Likes Received:
    17,026
    Location:
    Hoots mon...
    In my mind lean means hotter.
     
  10. wammers

    wammers No longer with us, RIP Donater

    Joined:
    Oct 19, 2008
    Posts:
    58,171
    Likes Received:
    11,666
    Location:
    Preston Lancs.
    Oh dear me.;):D
     
    Dopey likes this.
  11. myfirstl322

    myfirstl322 Well-Known Member Full Member

    Joined:
    Dec 29, 2012
    Posts:
    34,427
    Likes Received:
    17,026
    Location:
    Hoots mon...
    ^^
    I presume that comment was for me.

    Lean fuel mixture = Hotter combustion.

    Not the first law of thermal dynamics but it's up there.
     
  12. wammers

    wammers No longer with us, RIP Donater

    Joined:
    Oct 19, 2008
    Posts:
    58,171
    Likes Received:
    11,666
    Location:
    Preston Lancs.
    No not for you just general. How do you run a diesel lean?
     
    myfirstl322 likes this.
  13. Mark Piercy

    Mark Piercy Well fumbled member.... Full Member

    Joined:
    Jul 11, 2016
    Posts:
    9,936
    Likes Received:
    6,423
    Location:
    Right here!!
    Empty fuel tank?:p
     
    myfirstl322 likes this.
  14. myfirstl322

    myfirstl322 Well-Known Member Full Member

    Joined:
    Dec 29, 2012
    Posts:
    34,427
    Likes Received:
    17,026
    Location:
    Hoots mon...
    Anyone got a 'how to' on two finger typing?

    Like an ill positioned scaffolders harness the suspense is killing me.
     
    Last edited: Nov 16, 2017
  15. Mark Piercy

    Mark Piercy Well fumbled member.... Full Member

    Joined:
    Jul 11, 2016
    Posts:
    9,936
    Likes Received:
    6,423
    Location:
    Right here!!
    All day running regardless of the weather at twelve position. One occasion in Italy fully loaded with family and luggage up steep mountain road!! Damn nearly all the way up..stopped and turned around:confused::oops:
     
  16. myfirstl322

    myfirstl322 Well-Known Member Full Member

    Joined:
    Dec 29, 2012
    Posts:
    34,427
    Likes Received:
    17,026
    Location:
    Hoots mon...
    Hey, what do I know, I don't kneel at the DERV font, but I've got an inkling Turbocharging negates it to a large extent.
     
  17. wammers

    wammers No longer with us, RIP Donater

    Joined:
    Oct 19, 2008
    Posts:
    58,171
    Likes Received:
    11,666
    Location:
    Preston Lancs.
    The .90 mm setting mentioned is the static pump timing at TDC. It has nothing to do with how much fuel is injected. The .90 mm is where the timing device reverts to under spring pressure when engine is stopped and fuel pressure reduces internally in the injection pump. It gives a slightly advanced setting ready for the next start. When the engine starts the number four injector measures the actual point of injection, the ECU receives this signal and compares it to the TDC reading from the CPS. The ECU then modulates the timing device solenoid to increase or decrease internal fuel pressure against the spring loaded timing device to turn it as required to set the point of injection at 1 or 2 degrees BTDC. The only thing that will be apparent if the static timing is set at .80 mm at TDC, is that the modulation will be at the higher side of the acceptable normal, which should be between 45% and 55% engine warm and at idle. If the static timing is set retarded, the modulation will be higher than normal and if the static timing is advanced the modulation will be lower than normal. None of that effects the amount of fuel injected. And neither should it cause any running temp change.
     
  18. myfirstl322

    myfirstl322 Well-Known Member Full Member

    Joined:
    Dec 29, 2012
    Posts:
    34,427
    Likes Received:
    17,026
    Location:
    Hoots mon...
    So number four injector has a pressure sensor?
    Please don't say Oh dear.
     
  19. wammers

    wammers No longer with us, RIP Donater

    Joined:
    Oct 19, 2008
    Posts:
    58,171
    Likes Received:
    11,666
    Location:
    Preston Lancs.
    Yes it sends a signal to the ECU as it cracks to indicate the point of injection...
     
  20. myfirstl322

    myfirstl322 Well-Known Member Full Member

    Joined:
    Dec 29, 2012
    Posts:
    34,427
    Likes Received:
    17,026
    Location:
    Hoots mon...
    Interesting.

    Like all good governments a deputy is unnecessary.
     
< Previous Thread | Next Thread >