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300tdi engine noise .. rattling or is it?

Discussion in 'Defender 90 / 110 / 130' started by owas, Jun 18, 2022.

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  1. owas

    owas Well-Known Member

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    So my trusty 300tdi doesn't sound right,well atleast I don't think it does.
    Sounded a lot more rattly than it usualy did on the way back from Harrogate to Birmingham.
    A turbo pipe popped off too, these were just bodged together bits when I did the conversion so I've now replaced them with Steve Parkes kit.

    Sounded like valve clearances to me so I popped the cover off and found 3 caps missing, all replaced and set correctly.
    Still sounds rattly.

    Put a new exhaust and inlet manifold gasket on as I'd had the inlet manifold off twice without actually replacing the gasket. Still sounds rattly.

    I am now over sensitive to any noise so I don't know anymore so it could just be normal???:)

     
  2. tottot

    tottot Well-Known Member

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    It is not the same listening to a video as being there in person but My opinion is it sounds like a cold 300 with a bit slow tick over. Did you recover any lost caps ?
     
  3. owas

    owas Well-Known Member

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    Didn't find any of the lost caps.
    But nevermind,definitely not OK.
    Took it out for a test and it's cut out and won't start :rolleyes:

    I'll start going through it tomorrow, can't be bothered now.

    I reckon the rocker shaft might be snapped again,happend before and you couldn't tell till you took it off
     
    Last edited: Jun 18, 2022
  4. tottot

    tottot Well-Known Member

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    Have found lost cap between valve spring coils, this I recon could cause a jam resulting in a load on the rocker shaft.
     
  5. owas

    owas Well-Known Member

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    How do I check if the timing belts snapped?
    Had it done 15kish miles ago, only job I havnt done myself.
     

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  6. marjon

    marjon Well-Known Member Full Member

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    For me just by looking at those pushrods is enough.
    Dont know but the front cover needs to come off.

    J
     
  7. owas

    owas Well-Known Member

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    Yeah pulling off the cover now,
    Crank bolts come off nice and easy, just need to go grab a puller for the pulley.

    Through the wading hole I can see bits of oily shredded belt.
     
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  8. owas

    owas Well-Known Member

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    OK so belt in bits,
    When I had it done I told them to do everything while in there shouldn't the bottom pulley have a lip if it was replaced??

    Tbh I don't really know what I'm doing from now so I'll have to have a look at a guide ..
     

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  9. tottot

    tottot Well-Known Member

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    Before giving up the rattling may well have been because the belt had jumped a tooth and put the timing out, tdi's will run [ sort of ] a tooth out.
    Early 300's had problems with timing belt alignment but a kit was produced to fix this. It may be yours escaped the fix.
    Not a difficult job but has to be done right. Have a look on the you tube " 300 tdi timing belt replacement by Britannic restorations". lot's of good info.
     
  10. owas

    owas Well-Known Member

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    Having a look through all the videos now :)
    It was only a few years ago I had it done so looks like they decided they couldn't be bothered to replace it all,charged for it though!

    There seems to also be a 13mm headed bolt where I'm seeing should be a Allen key bolt on the tensioner.o_O
     
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  11. owas

    owas Well-Known Member

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    No good,
    Did the timing belt along with the seals and pulleys, replaced the push rods and rocker shaft, set the clearences,
    Ran beautifully, better than it ever has.
    Gave it a few revs and rattle, something seems to be wrong with valve 8.
    Cap missing and push rod stuck in hole, doesn't go up and down much at all.
    I know I'll have to pop the head off, not too difficult once I can find some time.
    With it being stuck down in the hole I'm thinking somethings gone wrong with the Cam follower when the timing belt snapped?
     
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