Cracked head or Injector O-rings





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  1. #1
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    Default Cracked head or Injector O-rings

    Hi Everyone!
    Hope your weekend has been good so far.

    I was hoping to get some advice, I recently bought a 1999 Defender 90 td5 (10p head) with 330 000km on the clock!!

    Got it for a really good price and it's in pretty decent condition for it's age.

    So after buying it I realised I never had a look at the oil level! :/ yeah, I know, rookie mistake!

    The level was really high up on the dipstick but the oil didn't smell like diesel and wasn't watered down. Thought previous owner might have overfilled with oil.

    Yesterday I drained the oil and did all the filters and new oil! Drained just over 8 liters of oil.

    Took the car for a drive round the block to check for any leaks and all was okay.

    This morning I checked the oil after the car has been standing all night and the level again was sky high on the dipstick. No obvious smell of diesel and oil feels fine between my fingers.

    I know the 10p heads are prone to cracking. Hoping its not that.

    Think I might do the injector washers and o rings first to see if it helps. I really hope it's not the head, who has that kind of money!?

    Any advice would be appreciated.

  2. #2
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    Default Re: Cracked head or Injector O-rings

    Oil rising s typically o-rings and washers, I would start there. It can be done diy if you have a torque wrench, injector puller and a few basic tools. If that does not work have the head pressure tested.

    Do you know if the head has been done? A 10p head on 330 000km that is still original would be pretty impressive.
    Pieter Greyling
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    Default Re: Cracked head or Injector O-rings

    Hi Theo,

    PM sent.

    Cheers,

    Bill.

  4. #4
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    Default Re: Cracked head or Injector O-rings

    Thanks. I thought it might be a good idea to do the washers and o rings first to see if it might be that.

    I have no idea if the head has been done. But agree that a 10p head with 330 000km on and still be original is probably to good to be true.

    Will report back after I have done the washers and o rings!
    Last edited by Theo Botha; 2017/11/12 at 06:07 PM.

  5. #5
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    Default Re: Cracked head or Injector O-rings

    The TD5 cylinder head gasket normally tend to start leaking before that amount of kilos.

    Bill.

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    Default Re: Cracked head or Injector O-rings

    Quote Originally Posted by Bills View Post
    What's left of the TD5 cylinder head gasket normally tend to start leaking before that amount of kilos.

    Bill.
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    Default Re: Cracked head or Injector O-rings

    Quote Originally Posted by Theo Botha View Post
    Will report back after I have done the washers and o rings!
    It may be overkill, but I heated my washers red hot and quenched them to anneal them prior to fitting them.
    Admittedly, it was a new head, so I wasn't expecting a leak, but decided that it wouldn't do any harm.
    Cheers,
    John

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  8. #8
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    Default Re: Cracked head or Injector O-rings

    I did the washers on my other td5 a while back, used tdi washers and also heated them up before fitting. It's been more than a year and no problems at all.

    So do you guys think I should go down the injector seals route first?

    When I drained the oil and replaced the tappet cover gasket I didn't see any white/milky sludge. Oil was just black! So is that a good indication that it's not water filling my sump?

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    Default Re: Cracked head or Injector O-rings

    Quote Originally Posted by Theo Botha View Post
    So do you guys think I should go down the injector seals route first?
    I would do that first. A LOT cheaper than a new head.
    Cheers,
    John

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    Default Re: Cracked head or Injector O-rings

    To keep things accurate, fuel can get into the oil only through the O-rings or a crack in the head, the copper washers have nothing to do with fuel in oil only with combustion gas in fuel which leads to hard starting and missfire though off course that if o-rings or washers are the problem they must be changed both

    to see if it's o-ring issue remove the rocker cover and turn ignition to II(dont crank it) then the pump will pressurise the system and if fuel is leaking near the o-rings you'll see it bubbling there or where the crack is if that's the case, here is a cross section of the head to be clear what's happening there
    Attached Images Attached Images  
    Last edited by sierrafery; 2017/11/13 at 08:22 PM.
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  11. #11
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    Default Re: Cracked head or Injector O-rings

    Just a tip when doing o-rings, make sure they are seated properly i.e not twisted.
    Pieter Greyling
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    Default Re: Cracked head or Injector O-rings

    Quote Originally Posted by pjf110 View Post
    Oil rising s typically o-rings and washers, I would start there. It can be done diy if you have a torque wrench, injector puller and a few basic tools. If that does not work have the head pressure tested.

    Do you know if the head has been done? A 10p head on 330 000km that is still original would be pretty impressive.
    To pop TD5 injectors out, you just put the short end of a 5mm allen key under the "bridge" and lever them
    As already mentioned, annealed TDi washers are the way to go
    Rob
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  13. #13
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    Default Re: Cracked head or Injector O-rings

    Hi Everyone. Sorry for only getting back to now. I did the injector O-rings and washers and did the fuel pressure regulator while I was at it.

    It seems to have solved my problem. Oil level looks better for now. Haven't been driving with the car a lot lately so wil check again in about a week or so.

    Now on to the next problem. The aircon compressor is so noisy I can't even hear the glorious TD5 rumble.

    Took the belt off and spun all the pulleys. And it seem to be just the aircon pulley.

    Is there a way to dismantle this thing and replace the bearing?
    Last edited by Theo Botha; 2017/12/07 at 11:05 AM.

  14. #14
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    Default Re: Cracked head or Injector O-rings

    Hi Theo,

    It is quite easy to strip.

    I have a new bearing lying in my garage. It is not a standard bearing.

    Cheers,

    Bill.

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    Default Re: Cracked head or Injector O-rings

    Hi Bill thanks for the reply, do I have to take the unit off to strip it? I only see one bolt on the front of the pulley, took it of and tried getting the pulley of but to no avail.

  16. #16
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    Default Re: Cracked head or Injector O-rings

    Theo,
    You dont have to take the unit off. I seem to remember that once you have the bolt out there is a washer and then a circlip.

    after you remove the circlip the pulley will slide off.

  17. #17
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    Default Re: Cracked head or Injector O-rings

    Thanks Bill. Will have a look a bit later. Don't remember seeing any washers or circlips.

    Will get back to you.

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