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!

Do tappets affect cold starts?

Discussion in '2.5 N/A' started by Genus Coffea, Feb 25, 2016.

< Previous Thread | Next Thread >
  1. Genus Coffea

    Genus Coffea Member

    Joined:
    Aug 5, 2015
    Posts:
    87
    Likes Received:
    1
    Location:
    Berkshire
    Just did the tappets, clearances were way too tight, motor now cold starting in 10-15 seconds and is much quieter, but sometimes when driving I now sometimes hear a sound like a pin dropping, no rhythm to the sound and it comes and goes irrespective of road/engine speed. Ideas?
     
  2. callisr

    callisr Well-Known Member

    Joined:
    Jun 21, 2005
    Posts:
    615
    Likes Received:
    287
    Location:
    Burton-on-Trent, Staffs
    I guess ig clearances were none existant then compression would be lost if valve wasnt fully closed. If there was a gap on each tappet then I wouldnt expect it to affect starting as each valve would be closed during compression.
    Is 10 - 15 seconds including heat time or cranking? If its cranking time I would check the heater plugs. Remove them one at time and connect them straight across a battery (hold the body of the plug onto the neg using pair of grips / pliers and run wire from the positive of the battery to the terminal on the heater plug).
    When connected, you should see the tip of the heater plug glow cherry red after a few seconds.
    Rich
     
  3. Paul D

    Paul D Old, nackered 'n broke, but the Landy is fine . :) LZIR Despatch Agent

    Joined:
    Jun 3, 2007
    Posts:
    14,902
    Likes Received:
    2,527
    Location:
    Doncaster
    I'd first do as above, if that doesn't help, I'd check the tappet springs and collets/top hats, then I'd probably take the head off and have a look at the bores, with a view to changing piston rings to get some compression back which helps cold starting no end.
     
  4. Genus Coffea

    Genus Coffea Member

    Joined:
    Aug 5, 2015
    Posts:
    87
    Likes Received:
    1
    Location:
    Berkshire
    Just heat time and one crank. Replaced the plugs a while before I did the tappets.
     
  5. Turboman

    Turboman Rural Activist

    Joined:
    Aug 21, 2010
    Posts:
    54,827
    Likes Received:
    56,871
    Location:
    Continuously Cruising
    Unserviced injectors dribbling fuel instead of spraying a nice plume of spray are very unhelpful with cold starting as well.
     
  6. Genus Coffea

    Genus Coffea Member

    Joined:
    Aug 5, 2015
    Posts:
    87
    Likes Received:
    1
    Location:
    Berkshire
    If that was the case would injector servicing be something a local garage could do or would a diesel shop have to do it.
     
  7. Genus Coffea

    Genus Coffea Member

    Joined:
    Aug 5, 2015
    Posts:
    87
    Likes Received:
    1
    Location:
    Berkshire
    Or would new injectors be cheaper...
     
  8. jamesmartin

    jamesmartin Well-Known Member

    Joined:
    Dec 8, 2010
    Posts:
    91,883
    Likes Received:
    20,290
    Location:
    louth lincs
    the fact you had a gap shouldnt effect a cold start unless there was no gap ,too large a gap retards cam timing and lowers compression as valve isnt fully opening
     
  9. Turboman

    Turboman Rural Activist

    Joined:
    Aug 21, 2010
    Posts:
    54,827
    Likes Received:
    56,871
    Location:
    Continuously Cruising
    Pull them out and take them to a fuel injection place, they will have a tester.
     
< Previous Thread | Next Thread >