Survey by Qualaroo
+ Reply to Thread
Results 1 to 9 of 9
Like Tree1Likes
  • 1 Post By Xulfiqar

Thread: Advice Needed: Toyota Corolla 2009 head valves

  1. #1
    PakWheeler Follow
    mohsin225's Avatar
    Join Date
    May 2009
    Location
    Lahore
    Age
    27
    Posts
    17
    Follows
    0
    Following
    0
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0

    Default Advice Needed: Toyota Corolla 2009 head valves

    Hi all,

    I am having Toyota Corolla GLi model 2010 80k KM done. The car is well maintained (oil and all other fluids replaced regularly) and in all genuine condition except that CNG has been installed in it at 30k KMs. The consumption and performance on CNG was poor in past and RPM used to fluctuate on CNG (sometimes drops to 0) but it has been fixed by mechanic by adjusting tappets gap and since then all is working well (average on petrol is 13 kmpl and around 140-150 per CNG cylinder).

    All i have to discuss is that rattling noise of tappets due to gaps is very annoying and as per mechanic i have to go for valves replacement in order to get it fixed permanently with default value. Please suggest whether i should get the new valves installed (pros and cons if any) and if so please suggest any good mechanic / Kharadia in LHR.

    Thanks in advance.

  2. #2
    Senior PakWheeler Follow
    Xulfiqar's Avatar
    Join Date
    Aug 2003
    Location
    Other
    Age
    38
    Posts
    24,405
    Follows
    131
    Following
    0
    Mentioned
    3992 Post(s)
    Tagged
    94 Thread(s)
    Problems Posted
    0
    Problems Solved
    4
    Best Answers
    0
    Good Answers
    6

    Default

    the new engines have very hard valve seats which dont wear out that quick. I read that you claim your mechanic adjusted the tappets, If that was done by "mechanic removing the head and shipping it to lathe shop" then the shop ground the valve stem tips and screwed them up.

    The tappet gaps are set by replacing the "lifters" - toyota make 11 different sizes of these lifters. Setting the tappets is a bit expensive business on these new engines.

    For new valves - buy them from a toyota parts supplier for replacements or from the dealership/showroom for genuine toyota items.
    ZRS - Zulfiqar Racing Systems ..... - professionals at work - at crackwheels.com

  3. #3
    Senior PakWheeler Follow
    omarabdullah022's Avatar
    Join Date
    Oct 2012
    Location
    Karachi
    Posts
    2,642
    Follows
    1
    Following
    1
    Mentioned
    96 Post(s)
    Tagged
    1 Thread(s)
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0

    Default

    Edit post-
    Contact a 3s dealership and follow Xulfiqar's directions... i think there was a different head on the cng fitted 2nz-fe's

  4. #4
    PakWheeler Follow
    ustaad_007's Avatar
    Join Date
    Jul 2005
    Location
    Karachi
    Age
    30
    Posts
    465
    Follows
    1
    Following
    0
    Mentioned
    11 Post(s)
    Tagged
    0 Thread(s)
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0

    Default

    Advice Needed: Toyota Corolla 2009 head valves - toyota corolla 2009 3677344


    I think this is the engine, but I heard from someone that this engine dosen't require tappet adjustment, and valves dosen't tear off that early.

  5. #5
    Senior PakWheeler Follow
    Xulfiqar's Avatar
    Join Date
    Aug 2003
    Location
    Other
    Age
    38
    Posts
    24,405
    Follows
    131
    Following
    0
    Mentioned
    3992 Post(s)
    Tagged
    94 Thread(s)
    Problems Posted
    0
    Problems Solved
    4
    Best Answers
    0
    Good Answers
    6

    Default

    you heard wrong, the tappet gaps are adjusted - but at about 60,000 kms (they are pretty much in spec even then). To adjust the gaps, the cams are removed and the whole lifter is swapped out for a different item (toyota sell different size lifters for this purpose).


    btw the rad cap is loose in this picture, will result in overheat.
    ZRS - Zulfiqar Racing Systems ..... - professionals at work - at crackwheels.com

  6. #6
    PakWheeler Follow
    mohsin225's Avatar
    Join Date
    May 2009
    Location
    Lahore
    Age
    27
    Posts
    17
    Follows
    0
    Following
    0
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0

    Default

    Thnx Zulfiqar and ustaad_007 for your reply.

    I am still confused what should i do...either valves needed to be replaced or tappets adjustment is required once again. (As per local mechanic RPM will not be stable on CNG if tappets are re-adjusted to default value).

    If i go for valves replacement what would be its cost in LHR and does it will be considered as whole head overhaul?

  7. #7
    Senior PakWheeler Follow
    Xulfiqar's Avatar
    Join Date
    Aug 2003
    Location
    Other
    Age
    38
    Posts
    24,405
    Follows
    131
    Following
    0
    Mentioned
    3992 Post(s)
    Tagged
    94 Thread(s)
    Problems Posted
    0
    Problems Solved
    4
    Best Answers
    0
    Good Answers
    6

    Default

    these new engines have quite good valve quality and excellent cooling too, unless the valve margin is completely shot or the seats are fully pounded in (very unlikely) - all you would need is a good old fashioned valve job which is not very hard, I have only seen valve stems go bad in engines that were purely run on CNG (overheated valves)

    ask for rates to verify in your city. Call up a few parts shops.
    ZRS - Zulfiqar Racing Systems ..... - professionals at work - at crackwheels.com

  8. #8
    PakWheeler Follow
    teletubby's Avatar
    Join Date
    Sep 2013
    Posts
    35
    Follows
    0
    Following
    2
    Mentioned
    2 Post(s)
    Tagged
    0 Thread(s)
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0

    Default

    Quote Originally Posted by Xulfiqar View Post
    these new engines have quite good valve quality and excellent cooling too, unless the valve margin is completely shot or the seats are fully pounded in (very unlikely) - all you would need is a good old fashioned valve job which is not very hard, I have only seen valve stems go bad in engines that were purely run on CNG (overheated valves)

    ask for rates to verify in your city. Call up a few parts shops.
    Respected sir zulfiqar,i hope you are well.i own a ford cortina running in a 4k engine with 4speed floor shift the cars suspention is orignal.i am looking forward to get its ball joints and rack endds changed its doesnt have the modren steringg assembly will i be able to get itts parts the car behaves weird it has ply in steering and makes thug sound on bumps ?also i have got a new clutch set for it the car eats away cluth very often what could be the problem?i need advise would i be able to find parts its for cortina mark 1 1966 the car orignally had 1500 cc engine changed bu its previous owner changed it to 4k

  9. #9
    PakWheeler Follow
    teletubby's Avatar
    Join Date
    Sep 2013
    Posts
    35
    Follows
    0
    Following
    2
    Mentioned
    2 Post(s)
    Tagged
    0 Thread(s)
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0

    Default

    Poster sorry for highjacking as i get answer i shall delete my post

+ Reply to Thread

User Tag List

Posting Permissions

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