Page 1 of 2 12 LastLast
Results 1 to 10 of 14

Thread: 300 tdi noises

  1. #1
    Join Date
    Oct 2022
    Location
    Brisbane, QLD
    Posts
    39
    Total Downloaded
    0

    300 tdi noises

    Hi all, got a noisy 300 tdi in a 110. There's a top end ticking noise which I'm tipping is vallve adjustment or a leaking exhaust manifold, but there's also a sort of sucking noise at the same frequency (but different phase) as the tick, so perhaps HG? Anyway, I've attached some audio, just wondering if anyone recognises these noises?

    Cheers, Will

    Audio: Tdi.m4a - Google Drive (I tried to attach it but the forum doesn't accept m4a)

  2. #2
    DiscoMick Guest
    Does the pulley on the timing belt have a slight wobble, causing it to touch something?
    There was an upgrade from LR, but you would assume it had been done by now.

  3. #3
    Join Date
    Oct 2022
    Location
    Brisbane, QLD
    Posts
    39
    Total Downloaded
    0
    Quote Originally Posted by DiscoMick View Post
    Does the pulley on the timing belt have a slight wobble, causing it to touch something?
    There was an upgrade from LR, but you would assume it had been done by now.
    I'll check that - assuming you're refering to this in relation to the tick? The tick seems to be coming from the top of the motor, and louder behind the motor on the passenger side, so don't think it's belt related, but I will check. Cheers for the response!

  4. #4
    Join Date
    Jun 2013
    Location
    Warner Area - SEQ
    Posts
    1,855
    Total Downloaded
    0
    I gather you have not touched the timing at all? U haven't changed the timing belt at all recently?

  5. #5
    Join Date
    Oct 2022
    Location
    Brisbane, QLD
    Posts
    39
    Total Downloaded
    0
    Quote Originally Posted by Robmacca View Post
    I gather you have not touched the timing at all? U haven't changed the timing belt at all recently?
    Nah haven't touched timing at all, are you thinking valves htting the pistons or some other timing issue? I might pop the rocker cover off and see how all that gear looks, although I don't really want to lash the valves myself. Just bought the car around a month ago, didn't notice the noise when I looked at it (twice, pretty thoroughly) but noticed it after a little while on the drive home (not saying it wasn't there initially, just didn't notice it). It's persisted this long but hasn't gotten worse, or shown any other symptoms, engine runs quite well otherwise

  6. #6
    Join Date
    Jun 2013
    Location
    Warner Area - SEQ
    Posts
    1,855
    Total Downloaded
    0
    Quote Originally Posted by Oberon 110 View Post
    Nah haven't touched timing at all, are you thinking valves htting the pistons or some other timing issue? I might pop the rocker cover off and see how all that gear looks, although I don't really want to lash the valves myself. Just bought the car around a month ago, didn't notice the noise when I looked at it (twice, pretty thoroughly) but noticed it after a little while on the drive home (not saying it wasn't there initially, just didn't notice it). It's persisted this long but hasn't gotten worse, or shown any other symptoms, engine runs quite well otherwise
    Check for missing/damaged lash caps...

  7. #7
    Join Date
    Oct 2022
    Location
    Brisbane, QLD
    Posts
    39
    Total Downloaded
    0
    Quote Originally Posted by Robmacca View Post
    Check for missing/damaged lash caps...
    Will do! Cheers

  8. #8
    Join Date
    Jan 2013
    Location
    Yarra Valley, Victoria
    Posts
    96
    Total Downloaded
    0
    Will, I had a similar issue in a Disco 300tdi. I removed the valve cover and turned the crankshaft over slowly. At a particular point every two revolutions a valve would snap shut with a loud clicking noise. It turned out that the camshaft drive pulley was working loose on the camshaft. (It is held in place by 3 hex-head setscrews) This allowed the camshaft to momentarily jump ahead by a few degrees before the drive pulley "caught up". The solution was a replacement drive pulley and threadlocker on the setscrews. From memory I had the timing belt replaced and timing reset at the same time.
    Cheers, Rob S

  9. #9
    Join Date
    Apr 2016
    Location
    Melbourne
    Posts
    4,200
    Total Downloaded
    0
    Before you chase down the 'complicated' stuff, also look into the more simple(and not so durable) items like the vacuum pump.

    Notorious for clicky/tappety noise and puffy/sucking/choofing/noises.

    Noises can deceptively 'travel' or bounce around and while you think it's coming from one point, it turns out it's coming from somewhere else.

    I had this issue on my D1 tdi, and drove me spare! ... loud clicky/clacky noise, and I was sure maybe a tappet or lash adjuster. Seemed to be louder on the passenger side of the engine, and more accurately about cyl 2 and 3.
    Cover off and all valves had good clearance and all caps still there. Maybe exhaust manifold .. ???
    Only place I couldn't point a stethoscope was near the front fan serpentine belt area, so off with the belt and motor idling ... and noise gone!
    Maybe water pump had some crud inside it .. could start to understand what this loud clack could be. Belt back on but fan off, allowed me to turn pump and get stethoscope near by gingerly avoiding spinning pulleys, and noise still seemed to be pass side near cyls 2/3.
    I thought to place slight pressure on serpentine belt adjuster and noise gone... and now I was getting closer. tighter belt ... noise gone. adjuster maybe shonky. new adjuster ... same stupid clack noise! ... arrgghhh!
    Issue was so simple ... belt stretched just that bit too much the adjuster was bouncing on it's end stop.
    Fitted a new belt, and with both old and new adjuster fitted, no clacking

    The point isn't that you don't have a valve or cam or whatever issue ... just that sometimes the issue is so simple ... and easy to eliminate from the probability list.

    That is: you have a noise whilst engine is spinning over. You can safely run the engine at idle for a few seconds with no fan or fan belt .. no problems.
    If you do this, does the noise change? If so then issue is going to be more simple than you may have originally considered.

    Another thing to keep in mind .. you could have multiple issues. The sucking like sound could also be gasket on inlet side leaky, or intake hose loose or something, and the tappety noise is something else.
    Arthur.

    '99 D1 300Tdi Auto
    '03 D2 Td5 Auto

  10. #10
    Join Date
    Oct 2022
    Location
    Brisbane, QLD
    Posts
    39
    Total Downloaded
    0
    Quote Originally Posted by LR1953 View Post
    Will, I had a similar issue in a Disco 300tdi. I removed the valve cover and turned the crankshaft over slowly. At a particular point every two revolutions a valve would snap shut with a loud clicking noise. It turned out that the camshaft drive pulley was working loose on the camshaft. (It is held in place by 3 hex-head setscrews) This allowed the camshaft to momentarily jump ahead by a few degrees before the drive pulley "caught up". The solution was a replacement drive pulley and threadlocker on the setscrews. From memory I had the timing belt replaced and timing reset at the same time.
    Cheers, Rob S
    Cheers Rob, I'll check for this when I pull the valve cover off

Page 1 of 2 12 LastLast

Tags for this Thread

Bookmarks

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
  •  
Search AULRO.com ONLY!
Search All the Web!