Results 1 to 18 of 18

Thread: Valve Adjustment?

Discussions of Triumph motor cars

  1. #1
    Luke Skywalker
    Join Date
    Jan 2007
    Location
    Winnipeg ,Manitoba,Canada
    Posts
    1,889
    Thanks Thanks Given 
    5
    Thanks Thanks Received 
    1
    Thanked in
    1 Post

    Valve Adjustment?

    How often should the valves be adjusted on a TR3? How can you tell when they need adjustment? Should they be adjusted warm? Any other valve adjustment tips?

  2. #2
    Yoda CJD's Avatar
    Join Date
    Feb 2011
    Location
    Southlake, TX, USA
    Posts
    5,108
    Thanks Thanks Given 
    4
    Thanks Thanks Received 
    20
    Thanked in
    20 Posts

    Re: Valve Adjustment?

    Funny...GM and Ford always said to adjust hot...but Triumph gives the cold adjust numbers. So set them cold.

    If they start to make a lot of noise (chattering or one valve clicking above the others)...then it's time.

    If you spend a lot of time at highway speeds using unleaded gas...check about every oil change.

    If you have an old rocker shaft and arms, then a feeler gage will not give an accurate gap. It bridges any wear marks on the arm tips, giving a larger actual gap than measured. Use a dial indicator for worn shafts and arms to get true gap.

    I make it a habit to check valves at every oil change, although that's probably overkill.
    John

    1955 TR2

  3. #3
    Great Pumpkin TR3driver's Avatar
    Join Date
    Aug 2003
    Location
    Sunny So California
    Posts
    19,034
    Thanks Thanks Given 
    4
    Thanks Thanks Received 
    86
    Thanked in
    82 Posts

    Re: Valve Adjustment?

    The TR4 workshop manual says to run the valves every 6000 miles, but I've never done it that often unless there is a problem. Normally, the clearances will only change very slowly as long as the oil is kept clean and so on. So I only do it once a year, as part of what I think of as a "major tune-up".

    In addition to excess noise as John mentioned, poor idle quality is another symptom of incorrect valve lash (particularly if they are too tight as a result of valve seat recession). Not getting a clear peak when adjusting mixture is another symptom.
    Randall
    56 TR3 TS13571L once and future daily driver
    71 Stag LE1473L waiting engine rebuild
    71-72-73 Stag LE2013LBW waiting OD gearbox rebuild

  4. #4
    Senior Member
    Join Date
    Oct 2018
    Location
    Livermore, Ca
    Posts
    106
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    5
    Thanked in
    5 Posts

    Re: Valve Adjustment?

    Pull all the spark plugs and gap them while you can still find your feeler gauge. This makes the engine easy to turn by hand. Then use the rule of nine.
    I bought a feeler gauge and when I got home I found it had a .009 and a.011 but no .010. I just used .011 and kept them a little tight.

    Steve

  5. #5
    Obi Wan
    Join Date
    Feb 2016
    Location
    Macon Georgia
    Posts
    2,272
    Thanks Thanks Given 
    10
    Thanks Thanks Received 
    26
    Thanked in
    24 Posts

    Re: Valve Adjustment?

    When I started to run my engine I had a valve tick. Checked the clearances again and it still ticks. So I removed the valve cover and ran the engine and put pressure an the rockers in turn till I found the culprit. I did noticed that I was getting oil to the rockers.
    The ticking rocker was not lose in fact it seemed a little tight so I slackened the adjuster right off to check for wear on the end of the rocker. No wear but the bushing was worn allowing the rocker to move up and down on the shaft.

    Have to order new bushes and shaft. I do have a spare that I am cleaning up to see if that can be pressed into service.

    I suppose the morale of the story is a ticking valve may not have too much clearance but have a worn rocker bush.

    David
    TR3A TS75524L

  6. #6
    Yoda poolboy's Avatar
    Join Date
    Oct 2007
    Location
    S.W. Mississippi
    Posts
    3,690
    Thanks Thanks Given 
    13
    Thanks Thanks Received 
    11
    Thanked in
    11 Posts

    Re: Valve Adjustment?

    Or an bad spark plug wire...I adjusted and checked (obsessively) valve lash even swapped rocker assemblies trying to eliminate a louder than normal tick on 'tick over'.
    Gave up...but much later for some other purpose I checked wire resistance..I found a bad one, replaced it and then the ticking sounded normal again.
    DRIVE 'EM IF YOU GOT 'EM

  7. #7
    Obi Wan
    Join Date
    Feb 2016
    Location
    Macon Georgia
    Posts
    2,272
    Thanks Thanks Given 
    10
    Thanks Thanks Received 
    26
    Thanked in
    24 Posts

    Re: Valve Adjustment?

    Good point worth remembering.

    David
    TR3A TS75524L

  8. #8
    Jedi Warrior 6TTR3A's Avatar
    Join Date
    Mar 2008
    Location
    San Diego, CA
    Posts
    420
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    2
    Thanked in
    2 Posts

    Re: Valve Adjustment?

    I just modified the feeler gauge to compensate for rocker arm wear at the
    valve stem contact point.
    Attached Images Attached Images

  9. #9
    Great Pumpkin TR3driver's Avatar
    Join Date
    Aug 2003
    Location
    Sunny So California
    Posts
    19,034
    Thanks Thanks Given 
    4
    Thanks Thanks Received 
    86
    Thanked in
    82 Posts

    Re: Valve Adjustment?

    You can actually buy feeler gauges with narrow tips, for that reason.

    Personally, I prefer to have the rockers rebuilt when they get that worn. It's easy to remove the shaft, and there is a service out here that does them. I don't recall the numbers offhand, but the total cost with shipping was very comparable to what I would spend for just the parts to do it. The results came back looking like new, I still don't know if they actually replaced the arms or just gave them a flash coat of copper. But only the pedestals and caps were obviously original.

    They've moved up north, but originally they were located in the same city where I worked.
    https://www.rockerarms.com/
    Randall
    56 TR3 TS13571L once and future daily driver
    71 Stag LE1473L waiting engine rebuild
    71-72-73 Stag LE2013LBW waiting OD gearbox rebuild

  10. #10
    Obi Wan
    Join Date
    Feb 2016
    Location
    Macon Georgia
    Posts
    2,272
    Thanks Thanks Given 
    10
    Thanks Thanks Received 
    26
    Thanked in
    24 Posts

    Re: Valve Adjustment?

    Started to clean up the spare rocker assembly.

    The rockers look like they are bronze bit the tip is steel? I need to check them with a magnet. No wear on them.

    David
    TR3A TS75524L

  11. #11
    Great Pumpkin TR3driver's Avatar
    Join Date
    Aug 2003
    Location
    Sunny So California
    Posts
    19,034
    Thanks Thanks Given 
    4
    Thanks Thanks Received 
    86
    Thanked in
    82 Posts

    Re: Valve Adjustment?

    The workshop manual says case hardened steel.
    Randall
    56 TR3 TS13571L once and future daily driver
    71 Stag LE1473L waiting engine rebuild
    71-72-73 Stag LE2013LBW waiting OD gearbox rebuild

  12. #12
    Obi Wan
    Join Date
    Feb 2016
    Location
    Macon Georgia
    Posts
    2,272
    Thanks Thanks Given 
    10
    Thanks Thanks Received 
    26
    Thanked in
    24 Posts

    Re: Valve Adjustment?

    Got the spare one cleaned up and checked that the oil passage was clear to all the rockers. No play on the rockers so I swapper the rocker assembly out with the one on the car. Took the opportunity to re-torque the head bolts.

    Set the gaps to 0.010" inlet and 0.012 exhaust as the book says. Or has that been updated?

    Still get some ticking. Maybe that is the normal amount on these motors.

    David
    TR3A TS75524L

  13. #13
    Great Pumpkin TR3driver's Avatar
    Join Date
    Aug 2003
    Location
    Sunny So California
    Posts
    19,034
    Thanks Thanks Given 
    4
    Thanks Thanks Received 
    86
    Thanked in
    82 Posts

    Re: Valve Adjustment?

    Unless you have a TR2 or early TR3 with cast iron rocker pedestals; the exhausts should be set to .010".

    But .012" won't hurt anything, except a little more noise.

    And yes, they always make some valve noise. The curse of solid lifters.
    Last edited by TR3driver; 02-12-2019 at 02:47 PM.
    Randall
    56 TR3 TS13571L once and future daily driver
    71 Stag LE1473L waiting engine rebuild
    71-72-73 Stag LE2013LBW waiting OD gearbox rebuild

  14. #14
    Obi Wan
    Join Date
    Feb 2016
    Location
    Macon Georgia
    Posts
    2,272
    Thanks Thanks Given 
    10
    Thanks Thanks Received 
    26
    Thanked in
    24 Posts

    Re: Valve Adjustment?

    Hello Randall

    I thought I remembered they were both 0.010" but could not find the info in a quick leaf through my books so I went with 0.012" to be safe. I well re set later this morning.

    The noise sounds more even now. Before there was a definite location for the louder noise.

    David
    TR3A TS75524L

  15. #15
    Great Pumpkin TR3driver's Avatar
    Join Date
    Aug 2003
    Location
    Sunny So California
    Posts
    19,034
    Thanks Thanks Given 
    4
    Thanks Thanks Received 
    86
    Thanked in
    82 Posts

    Re: Valve Adjustment?

    My apologies, misremembered the change point. The aluminum pedestals were introduced to production at TS12564E, which isn't even TR2, let alone an early one! My earlier engine must have been retro-fitted at some point.

    Anyway, the .010" number can be found in the back of the factory workshop manual (Engine section of the TR3 supplement), or in Practical Hints (page 31 in the 6th edition)
    https://drive.google.com/open?id=0B2...EyZDgxMzUyNzUw
    Randall
    56 TR3 TS13571L once and future daily driver
    71 Stag LE1473L waiting engine rebuild
    71-72-73 Stag LE2013LBW waiting OD gearbox rebuild

  16. #16
    Luke Skywalker
    Join Date
    Jan 2007
    Location
    Winnipeg ,Manitoba,Canada
    Posts
    1,889
    Thanks Thanks Given 
    5
    Thanks Thanks Received 
    1
    Thanked in
    1 Post

    Re: Valve Adjustment?

    Can the tip of the rocker arms not be lightly cleaned up with a fine file provided the wear is not excessive?

  17. #17
    Senior Member
    Join Date
    May 2012
    Location
    Robbinsville, NC; Everglades City, Fl
    Posts
    598
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    4
    Thanked in
    4 Posts

    Re: Valve Adjustment?

    Karls59

    You would have a hard time getting the flatness (parallel to the shaft) and the roundness (perpendicular) right.

    Bob

  18. #18
    Obi Wan
    Join Date
    Feb 2016
    Location
    Macon Georgia
    Posts
    2,272
    Thanks Thanks Given 
    10
    Thanks Thanks Received 
    26
    Thanked in
    24 Posts

    Re: Valve Adjustment?

    A file will probable not make any impression on them. The tips are very hard.

    A machine shop with a flat grinding wheel would be able to do it.

    David
    TR3A TS75524L

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •